def estimate_rot(data_num=1):
#your code goes here
imu = io.loadmat(
os.path.join(os.path.dirname(__file__),
"imu/imuRaw" + str(data_num) + ".mat"))
#imu = io.loadmat('imu/imuRaw'+str(data_num)+'.mat')
accel = imu['vals'][0:3, :]
gyro = imu['vals'][3:6, :]
T = np.shape(imu['ts'])[1]
time = imu['ts']
w_z, w_x, w_y, a_x, a_y, a_z = calibration(imu, accel, gyro, T)
angular_velocities = np.array([w_x, w_y, w_z])
accelerations = np.array([a_x, a_y, a_z])
dt = np.diff(time)
iters = accelerations.shape[1] - 1
roll, pitch, yaw = [], [], []
#print(angular_velocities[:, 0])
ukf = UKF(angular_velocities, accelerations, dt)
roll, pitch, yaw = ukf.main(ukf, iters)
"""
for i in range(iters):
print("At Iteration: {}".format(i ))
omega = angular_velocities[:, i].reshape(3, 1)
accel = accelerations[:, i].reshape(3, 1)
ukf.forward(i)
mu_q = Quaternion()
mu_q.q = ukf.mu
euler_angles = mu_q.euler_angles()
roll.append(euler_angles[0])
pitch.append(euler_angles[1])
yaw.append(euler_angles[2])
"""
roll, pitch, yaw = np.array(roll), np.array(pitch), np.array(yaw)
return roll, pitch, yaw
def setUp(self):
def fx(x, T): return x
def hx(x): return x
x0 = np.array([0, 0])
P0 = np.array([[1, 0.5], [0.5, 1]])
Q = np.eye(2)
R = np.eye(2)
self.ukf = UKF(fx, hx, Q, R, x0, P0)
class TestUKF(unittest.TestCase):
def setUp(self):
def fx(x, T): return x
def hx(x): return x
x0 = np.array([0, 0])
P0 = np.array([[1, 0.5], [0.5, 1]])
Q = np.eye(2)
R = np.eye(2)
self.ukf = UKF(fx, hx, Q, R, x0, P0)
def test_predict(self):
self.ukf.predict(T=1)
(x, P) = self.ukf.get_state()
x = np.round(x, decimals=5)
P = np.round(P, decimals=5)
self.assertTrue((x == np.array([0, 0])).all())
self.assertTrue((P == np.array([[2, 0.5], [0.5, 2]])).all())
def test_update(self):
self.ukf.predict(T=1)
self.ukf.update(np.array([1, 1]))
(x, P) = self.ukf.get_state()
x = np.round(x, decimals=5)
P = np.round(P, decimals=5)
self.assertTrue((x == np.array([0.71429, 0.71429])).all())
self.assertTrue((P == np.array([[0.65714, 0.05714], [0.05714, 0.65714]])).all())
def estimate_rot(data_num=1):
vals_data = []
ts_data = []
filename = os.path.join(os.path.dirname(__file__), "imu/imuRaw" + str(data_num) + ".mat")
imuRaw = io.loadmat(filename)
trim_imu = {k:imuRaw[k] for k in ['vals', 'ts']}
trim_imu['vals'] = np.rollaxis(trim_imu['vals'], 1)
trim_imu['ts'] = np.rollaxis(trim_imu['ts'], 1)
trim_imu['vals'][:, [3, 5]] = trim_imu['vals'][:, [5, 3]]
trim_imu['vals'][:, [3, 4]] = trim_imu['vals'][:, [4, 3]]
trim_imu['vals'] = trim_imu['vals'].astype(float)
vals_data.append(trim_imu['vals'])
ts_data.append(trim_imu['ts'])
imu_data_new = []
for data in vals_data:
cleaned_data = clean_data_imu(data)
imu_data_new.append(cleaned_data)
imu_data_new[0][:,0] = -imu_data_new[0][:,0]
imu_data_new[0][:,1] = -imu_data_new[0][:,1]
delta_ts = []
ts = np.diff(ts_data[0], axis = 0)
delta_ts = np.concatenate([np.array([0]).reshape(1,1), ts])
###UKF
roll, pitch, yaw = UKF(imu_data_new[0], delta_ts)
return roll,pitch,yaw
def create_filter(x, P):
def fx(x, T):
# x.shape = (N, k, 1)
# x = [xp, yp, v, phi, dphi]
xp = x[:, 0, :] + T * x[:, 2, :] * np.cos(x[:, 3, :])
yp = x[:, 1, :] + T * x[:, 2, :] * np.sin(x[:, 3, :])
v = x[:, 2, :]
phi = x[:, 3, :] + T * x[:, 4, :]
dphi = x[:, 4, :]
x = np.concatenate((xp, yp, v, phi, dphi), axis=1)
return x[..., None]
q_v = 1**2
q_dphi = 1**2
gamma = np.array([[0, 0, 1, 0, 0], [0, 0, 0, 0, 1]])
Q = gamma.transpose() @ np.diag([q_v, q_dphi]) @ gamma
def hx(x):
# x.shape = (N, k, 1)
return x[:, 0:-1, :]
r_x = 3**2
r_y = 3**2
r_v = 3**2
r_phi = 2**2
R = np.diag([r_x, r_y, r_v, r_phi])
ukf = UKF(fx, hx, Q, R, x, P)
return ukf
def solve_ukf(self):
def fx(x, dt):
# x[4], x[5], x[6] = x[4], normalize_angle(x[5]), normalize_angle(x[6])
sol = self.ode2(x)
# sol = self.ode_int(x)
return np.array(sol)
def hx(x):
return np.array([x[3], x[2], normalize_angle(x[4])])
# points = MerweScaledSigmaPoints(n=7, alpha=.00001, beta=2., kappa=-4.)
points = JulierSigmaPoints(n=7, kappa=-4., sqrt_method=None)
# points = SimplexSigmaPoints(n=7)
kf = UKF(dim_x=7,
dim_z=3,
dt=self.dt,
fx=fx,
hx=hx,
points=points,
sqrt_fn=None,
x_mean_fn=self.state_mean,
z_mean_fn=self.meas_mean,
residual_x=self.residual_x,
residual_z=self.residual_z)
x0 = np.array(self.ini_val)
# x0 = np.reshape(x0, (1,7))
kf.x = x0 # initial mean state
kf.Q *= np.diag([.0001, .0001, .0001, .0001, .0001, .01, .01])
kf.P *= 0.000001 # kf.P = eye(dim_x) ; adjust covariances if necessary
kf.R *= 0.0001
Ms, Ps = kf.batch_filter(self.zs)
Ms[:, 5] = self.al_to_th(Ms[:, 5])
Ms[:, 6] = self.al_to_th(Ms[:, 6])
return Ms
def __init__(self, prediction, trackIdCount):
"""Initialize variables used by Track class
Args:
prediction: predicted centroids of object to be tracked
trackIdCount: identification of each track object
Return:
None
"""
self.track_id = trackIdCount # identification of each track object
self.KF = UKF(
prediction) #,self.iterate_x) # KF instance to track this object
self.prediction = np.asarray(prediction) # predicted centroids (x,y)
self.skipped_frames = 0 # number of frames skipped undetected
self.trace = [] # trace path
def move_wheelchair(self):
self.ini_cwo_l = 2 * np.pi * np.random.random_sample() * -np.pi
self.ini_cwo_r = 2 * np.pi * np.random.random_sample() * -np.pi
while rospy.get_time() == 0.0:
continue
rospy.sleep(1)
# self.ini_val = [self.wheel_cmd.angular.z, -self.wheel_cmd.linear.x, -self.odom_y, self.odom_x, self.odom_th, self.th_to_al(self.l_caster_angle), self.th_to_al(self.r_caster_angle)]
self.ini_val = [
0.0, 0.0, 0.0, 0.0, 0.0, self.ini_cwo_l, self.ini_cwo_r
]
# self.ini_val = np.random.uniform(low=-1.0, high=1.0, size=(7,)).tolist()
# UKF initialization
def fx(x, dt):
sol = self.ode2(x)
return np.array(sol)
def hx(x):
return np.array([x[3], x[2], normalize_angle(x[4])])
# points = MerweScaledSigmaPoints(n=7, alpha=.00001, beta=2., kappa=-4.)
points = JulierSigmaPoints(n=7, kappa=-4., sqrt_method=None)
# points = SimplexSigmaPoints(n=7)
kf = UKF(dim_x=7,
dim_z=3,
dt=self.dt,
fx=fx,
hx=hx,
points=points,
sqrt_fn=None,
x_mean_fn=self.state_mean,
z_mean_fn=self.meas_mean,
residual_x=self.residual_x,
residual_z=self.residual_z)
x0 = np.array(self.ini_val)
kf.x = x0 # initial mean state
kf.Q *= np.diag([.0001, .0001, .0001, .0001, .0001, .01, .01])
kf.P *= 0.000001 # kf.P = eye(dim_x) ; adjust covariances if necessary
kf.R *= 0.0001
count = 0
rospy.loginfo("Moving robot...")
start = rospy.get_time()
self.r.sleep()
while (rospy.get_time() - start <
self.move_time) and not rospy.is_shutdown():
self.pub_twist.publish(self.wheel_cmd)
z = np.array([self.odom_x, -self.odom_y, self.odom_th])
self.zs.append(z)
kf.predict()
kf.update(z)
self.xs.append(kf.x)
self.pose_x_data.append(self.odom_x)
self.pose_y_data.append(self.odom_y)
self.pose_th_data.append(self.odom_th)
self.l_caster_data.append(self.l_caster_angle)
self.r_caster_data.append(self.r_caster_angle)
count += 1
self.r.sleep()
# Stop the robot
self.pub_twist.publish(Twist())
self.xs = np.array(self.xs)
rospy.sleep(1)
return z
if __name__ == "__main__":
read_file = True
if read_file:
t, v, w = readFile()
vc, wc = generateVelocities(t)
else:
t = np.arange(0, params.tf, params.dt)
vc, wc = generateVelocities(t)
v = vc + np.sqrt(params.alpha1 * vc**2 + params.alpha2 * wc**2) * np.random.randn(vc.size)
w = wc + np.sqrt(params.alpha3 * vc**2 + params.alpha4 * wc**2) * np.random.randn(wc.size)
Car = CarAnimation()
ukf = UKF(params.dt)
x_hist = []
mu_hist = []
err_hist = []
x_covar_hist = []
y_covar_hist = []
psi_covar_hist = []
K_hist = []
x0 = params.x0
y0 = params.y0
phi0 = params.theta0
state = np.array([x0, y0, phi0])
dead_reckon = np.array([x0, y0, phi0])
mu = np.array([x0, y0, phi0])
rnn100 = load_model('models/rnn-units100-simungm-{0}-{1}.h5'.format(
training_size, T))
all_y = []
all_x = []
ukf_mses = []
ekf_mses = []
lstm_mses = []
lstm_stacked_mses = []
bar = ProgressBar()
for s in bar(range(num_sims)):
#x_0 = np.random.normal(0, x_var, 1)
x_0 = np.array([0])
sim = UNGM(x_0, R, Q, x_var)
ukf = UKF(sim.f, sim.F, sim.h, sim.H, sim.Q, sim.R, 5., first_x_0, 1)
ekf = EKF(sim.f, sim.F, sim.h, sim.H, sim.Q, sim.R, first_x_0, 1)
for t in range(T):
x, y = sim.process_next()
ukf.predict()
ukf.update(y)
ekf.predict()
ekf.update(y)
ukf_mses.append(MSE(ukf.get_all_predictions(), sim.get_all_x()))
ekf_mses.append(MSE(ekf.get_all_predictions(), sim.get_all_x()))
all_x.append(np.array(sim.get_all_x()))
all_y.append(np.array(sim.get_all_y()))
X = np.array(all_y)[:, :-1, :]
y = np.array(all_x)[:, 1:, :]
def main():
np.set_printoptions(precision=3)
# Process Noise
q = np.eye(6)
q[0][0] = 0.0001
q[1][1] = 0.0001
q[2][2] = 0.0004
q[3][3] = 0.0025
q[4][4] = 0.0025
q[5][5] = 0.0025
realx = [0]
realy = [0]
estimatex = [0]
estimatey = [0]
t = [0]
# create measurement noise covariance matrices
r_imu = np.zeros([2, 2])
r_imu[0][0] = 0.01
r_imu[1][1] = 0.03
r_compass = np.zeros([1, 1])
r_compass[0][0] = 0.02
r_encoder = np.zeros([1, 1])
r_encoder[0][0] = 0.001
# pass all the parameters into the UKF!
# number of state variables, process noise, initial state, initial coariance, three tuning paramters, and the iterate function
state_estimator = UKF(6, q, np.zeros(6), 0.0001 * np.eye(6), 0.04, 0.0,
2.0, iterate_x)
with open('example.csv', 'r') as csvfile:
reader = csv.reader(csvfile)
headers = next(reader)
last_time = 0
# read data
for row in reader:
row = [float(x) for x in row]
cur_time = row[0]
d_time = cur_time - last_time
real_state = np.array([row[i] for i in [5, 6, 4, 3, 2, 1]])
# create an array for the data from each sensor
compass_hdg = row[9]
compass_data = np.array([compass_hdg])
encoder_vel = row[10]
encoder_data = np.array([encoder_vel])
imu_accel = row[7]
imu_yaw_rate = row[8]
imu_data = np.array([imu_yaw_rate, imu_accel])
last_time = cur_time
# prediction is pretty simple
state_estimator.predict(d_time)
# updating isn't bad either
# remember that the updated states should be zero-indexed
# the states should also be in the order of the noise and data matrices
state_estimator.update([4, 5], imu_data, r_imu)
state_estimator.update([2], compass_data, r_compass)
state_estimator.update([3], encoder_vel, r_encoder)
print("--------------------------------------------------------")
print("Real state: ", real_state)
print("Estimated state: ", state_estimator.get_state())
print("Difference: ", real_state - state_estimator.get_state())
realx.append(real_state[3])
realy.append(real_state[1])
estimatex.append(state_estimator.get_state(3))
estimatey.append(state_estimator.get_state(1))
t.append(d_time)
plt.plot(estimatex, "-b")
plt.plot(realx, "-r")
import numpy as np
import matplotlib.pyplot as plt
import car_params as params
import scipy.io as sio
from ukf import UKF
from ukf import unwrap
from extractdata import *
if __name__ == "__main__":
ukf = UKF()
x_hist = truth_data['x_truth']
y_hist = truth_data['y_truth']
theta_hist = truth_data['th_truth']
t_truth = truth_data['t_truth']
mu_hist = []
err_hist = []
covar_hist = []
x0 = params.x0
y0 = params.y0
phi0 = params.theta0
mu = np.array([x0, y0, phi0])
Sigma = np.eye(3)
t_prev = 0.0
meas_index = 0
for i in range(odom_t.size):
#stuff for plotting
mu_hist.append(mu)
dt = odom_t.item(i) - t_prev
[0, 0, 1.0000]]) # MATLAB's CAMERA
self.tf_cam_ego = inv_tf(
np.array([[0., 0., 1., 0.05], [-1., 0., 0., 0.],
[0., -1., 0., 0.07], [0., 0., 0., 1.]]))
def pnt3d_to_pix(self, pnt_c):
""" input: assumes pnt in camera frame output: [row, col] i.e. the projection of xyz onto camera plane """
rc = self.K @ np.reshape(pnt_c[0:3], 3, 1)
return np.array([rc[1], rc[0]]) / rc[2]
if __name__ == '__main__':
np.set_printoptions(
linewidth=100,
suppress=True) # format numpy so printing matrices is more clear
ukf = UKF()
ukf.mu = np.array([
-0.88312477, -0.15021993, 0.83246046, 0., 0., 0., 0.99925363,
-0.00460481, 0.00205432, 0.03829992, 0., 0, 0.
])
ukf.camera = camera()
ukf.bb_3d = np.array([[0.135, 0.135, 0.065, 1.],
[0.135, 0.135, -0.065, 1.],
[0.135, -0.135, -0.065, 1.],
[0.135, -0.135, 0.065, 1.],
[-0.135, -0.135, 0.065, 1.],
[-0.135, -0.135, -0.065, 1.],
[-0.135, 0.135, -0.065, 1.],
[-0.135, 0.135, 0.065, 1.]])
tf_ego_w = np.array([[0.99903845, 0.01473524, 0.04129215, 3.6821852],
def run_execution_loop():
b_use_gt_bb = rospy.get_param('~b_use_gt_bb')
b_use_gt_pose_init = rospy.get_param('~b_use_gt_pose_init')
b_use_gt_detect_bb = rospy.get_param('~b_use_gt_detect_bb')
b_use_track_checks = rospy.get_param('~b_use_track_checks')
b_verbose = rospy.get_param('~b_verbose')
detection_period_ros = rospy.get_param('~detection_period') # In seconds
objects_sizes_yaml = rospy.get_param('~object_sizes_file')
objects_used_path = rospy.get_param('~object_used_file')
classes_names_file = rospy.get_param('~classes_names_file')
b_pub_3d_bb_proj = rospy.get_param('~b_pub_3d_bb_proj')
detector_weights = rospy.get_param('~detector_weights')
detector_cfg = rospy.get_param('~detector_cfg')
b_filter_meas = True
ros = ROS(b_use_gt_bb,
b_verbose,
b_use_gt_pose_init,
b_use_gt_detect_bb,
b_pub_3d_bb_proj,
b_publish_gt_3d_projections=(
False and b_pub_3d_bb_proj)) # create a ros interface object
# Returns dict of params per class name
category_params = load_category_params()
bb_3d, obj_width, obj_height, classes_names, classes_ids, objects_names_per_class, connected_inds = \
get_object_sizes_from_yaml(objects_sizes_yaml, objects_used_path, classes_names_file, category_params) # Parse objects used and associated configurations
ros.objects_names_per_class = objects_names_per_class
ros.bb_3d = bb_3d
if b_use_gt_bb:
rospy.logwarn(
"\n\n\n------------- IN DEBUG MODE (Using Ground Truth Bounding Boxes) -------------\n\n\n"
)
time.sleep(0.5)
if not b_use_gt_bb:
print('Waiting for first image')
im = ros.get_first_image()
print('initializing image segmentor!!!!!!')
detector_name = 'edge_tpu_mobile_det' # detector_name='edge_tpu_mobile_det' | yolov3 (default)
ros.im_seg = ImageSegmentor(im,
detector_name=detector_name,
use_trt=rospy.get_param('~b_use_tensorrt'),
detection_period=detection_period_ros,
verbose=b_verbose,
detect_classes_ids=classes_ids,
detect_classes_names=classes_names,
use_track_checks=b_use_track_checks,
use_gt_detect_bb=b_use_gt_detect_bb,
detector_weights=detector_weights)
print('initializing DONE - PLAY BAG NOW!!!!!!')
time.sleep(0.5)
rate = rospy.Rate(30) # max filter rate
ukf_dict = {} # key: object_id value: ukf object
ros.camera = camera(ros)
my_camera = ros.camera
loop_time_hist = []
fe_time_hist = []
be_time_hist = []
loop_ave_info = [0, 0] # [running mean, num els]
fe_ave_info = [0, 0] # [running mean, num els]
be_ave_info = [0, 0] # [running mean, num els]
ros.create_subs_and_pubs()
dim_state = 13
state_est = np.zeros((dim_state + dim_state**2, ))
loop_count = 0
previous_image_time = 0
if b_use_gt_bb:
init_state_from_gt(ros, ukf_dict['quad4'])
img_seg = None
tic = time.time()
while not rospy.is_shutdown():
# store data locally (so it doesnt get overwritten in ROS object)
loop_time = ros.latest_img_time
if loop_time <= previous_image_time or ros.latest_img_time < 0:
# this means we dont have new data yet
rate.sleep()
continue
if loop_count == 0:
# first iteration, need initial time so dt will be accurate
previous_image_time = loop_time
loop_count += 1
rate.sleep()
continue
t_be_start = time.time() # start timer for backend
new_fe_time = ros.front_end_time
fe_time_hist.append(new_fe_time)
loop_time_hist.append(loop_time - previous_image_time)
previous_image_time = loop_time # this ensures we dont reuse the image
# get latest data from ros
processed_image = ros.im_process_output
im_seg_mode = ros.latest_bb_method
# do we have any objects?
num_obj_in_img = len(processed_image)
if num_obj_in_img == 0: # if no objects are seen, dont do anything
print("No objects detected/tracked in FOV")
rate.sleep()
continue
tf_w_ego = ros.tf_w_ego
tf_w_ego_gt = ros.tf_w_ego_gt
tf_ego_w = inv_tf(tf_w_ego) # ego quad pose
if b_use_gt_bb:
raise RuntimeError("b_use_gt_bb option NOT YET IMPLEMENTED")
# handle each object seen
obj_ids_tracked = []
for obj_id, (abb, class_str, valid) in processed_image.items():
ukf = None
if not obj_id in ukf_dict: # New Object
print("new object (id = {}, type = {})".format(
obj_id, class_str))
ukf_dict[obj_id] = UKF(camera=my_camera,
bb_3d=bb_3d[class_str],
obj_width=obj_width[class_str],
obj_height=obj_height[class_str],
ukf_prms=category_params[class_str],
init_time=loop_time,
class_str=class_str,
obj_id=obj_id,
verbose=b_verbose)
if b_use_gt_pose_init:
approx_position, _ = ukf_dict[obj_id].approx_pose_from_bb(
abb, tf_w_ego)
gt_pose = ros.get_closest_pose(class_str, approx_position)
ukf_dict[obj_id].reinit_filter_from_gt(gt_pose)
# Avoid reusing GT to initialize pose TODO Currently limits gt to first object
b_use_gt_pose_init = False
else:
ukf_dict[obj_id].reinit_filter_approx(abb, tf_w_ego)
continue
obj_ids_tracked.append(obj_id)
if ukf_dict[obj_id] is not None:
ukf_dict[obj_id].step_ukf(abb, tf_ego_w,
loop_time) # update ukf
if b_pub_3d_bb_proj:
tf_w_ado = state_to_tf(ukf_dict[obj_id].mu)
if ros.b_publish_gt_3d_projections: # concatenate the gt projection
tf_w_ado_gt_array = ros.get_closest_pose(
class_str, ukf_dict[obj_id].mu[0:3])
tf_w_ado_gt = np.eye(4)
tf_w_ado_gt[0:3, 3] = tf_w_ado_gt_array[0:3]
tf_w_ado_gt[0:3,
0:3] = quat_to_rotm(tf_w_ado_gt_array[3:7])
ukf_dict[obj_id].projected_3d_bb = np.vstack(
(np.fliplr(
pose_to_3d_bb_proj(tf_w_ado, tf_w_ego,
ukf_dict[obj_id].bb_3d,
ukf_dict[obj_id].camera)),
np.fliplr(
pose_to_3d_bb_proj(tf_w_ado_gt, tf_w_ego_gt,
ukf_dict[obj_id].bb_3d,
ukf_dict[obj_id].camera))))
else:
ukf_dict[obj_id].projected_3d_bb = np.fliplr(
pose_to_3d_bb_proj(tf_w_ado, tf_w_ego,
ukf_dict[obj_id].bb_3d,
ukf_dict[obj_id].camera))
if class_str in connected_inds:
ukf_dict[obj_id].connected_inds = connected_inds[
ukf_dict[obj_id].class_str]
be_time_hist.append(time.time() - t_be_start)
ros.publish_filter_state(obj_ids_tracked, ukf_dict)
ros.publish_bb_msg(processed_image, im_seg_mode, loop_time)
# update running averages
loop_ave_info = update_running_average(loop_ave_info,
loop_time_hist[-1])
fe_ave_info = update_running_average(fe_ave_info, fe_time_hist[-1])
be_ave_info = update_running_average(be_ave_info, be_time_hist[-1])
if loop_count % 10 == 0:
print(
"loop itr {}:\n\tAve front end time = {}\n\tAve back end time = {}\n\tAve loop time - {}\n\t%% detects = {}"
.format(
loop_count, fe_ave_info[0], be_ave_info[0],
loop_ave_info[0],
100 * ros.im_seg.num_detections / ros.num_imgs_processed))
# Save current object states in image segmentor
ros.im_seg.ukf_dict = ukf_dict
# ros.im_seg_mode = ros.TRACK
if b_verbose:
print("FULL END-TO-END time = {:4f}\n".format(time.time() - tic))
rate.sleep()
tic = time.time()
loop_count += 1
def main():
np.set_printoptions(precision=3)
# Process Noise
q = np.eye(6)
q[0][0] = 0.0001
q[1][1] = 0.0001
q[2][2] = 0.0004
q[3][3] = 0.0025
q[4][4] = 0.0025
q[5][5] = 0.0025
# create measurement noise covariance matrices
r_imu = np.zeros([2, 2])
r_imu[0][0] = 0.01
r_imu[1][1] = 0.03
r_compass = np.zeros([1, 1])
r_compass[0][0] = 0.02
r_encoder = np.zeros([1, 1])
r_encoder[0][0] = 0.001
# pass all the parameters into the UKF!
# number of state variables, process noise, initial state, initial coariance, three tuning paramters, and the iterate function
state_estimator = UKF(6, q, np.zeros(6), 0.0001*np.eye(6), 0.04, 0.0, 2.0, iterate_x)
i=0
csvfile=open('example.csv', 'r')
for reader in csvfile:
#print()
#reader = csv.reader(csvfile)
#reader=next(reader)
row=reader.split(',')
#print(reader)
last_time = 0
# read data
if i!=0:
#for row in reader:
print(row)
'''
try:
row = [float(x) for x in row]
except ValueError:
print("error")
'''
cur_time = float(row[0])
d_time = cur_time - last_time
real_state = np.array([float(row[i]) for i in [5, 6, 4, 3, 2, 1]])
# create an array for the data from each sensor
compass_hdg = float(row[9])
compass_data = np.array([compass_hdg])
encoder_vel = float(row[10])
encoder_data = np.array([encoder_vel])
imu_accel = float(row[7])
imu_yaw_rate = float(row[8])
imu_data = np.array([imu_yaw_rate, imu_accel])
last_time = cur_time
# prediction is pretty simple
state_estimator.predict(d_time)
# updating isn't bad either
# remember that the updated states should be zero-indexed
# the states should also be in the order of the noise and data matrices
state_estimator.update([4, 5], imu_data, r_imu)
state_estimator.update([2], compass_data, r_compass)
state_estimator.update([3], encoder_vel, r_encoder)
print ("--------------------------------------------------------")
print ("Real state: ", real_state)
print ("Estimated state: ", state_estimator.get_state())
print ("Difference: ", real_state - state_estimator.get_state())
i+=1
import animation
reload(animation)
from animation import Animation
# import plotData
# reload(plotData)
# from plotData import plotData
import ukf
reload(ukf)
from ukf import UKF
dynamics = Dynamics()
animation = Animation()
# dataPlot = plotData()
ukf = UKF()
states = dynamics.states()
mu = ukf.get_mu()
sig = ukf.get_sig()
Ks = ukf.get_k()
t = P.t_start
while t < P.t_end:
t_next_plot = t + P.t_plot
while t < t_next_plot:
t = t + P.Ts
vc = 1 + 0.5 * np.cos(2 * np.pi * (0.2) * t)
omegac = -0.2 + 2 * np.cos(2 * np.pi * (0.6) * t)
noise_v = vc + np.random.normal(
0, np.sqrt(P.alpha1 * vc**2 + P.alpha2 * omegac**2))
def ukf_move_wheelchair(self):
while rospy.get_time() == 0.0:
continue
rospy.sleep(1)
def fx(x, dt):
x[0], x[1] = normalize_angle(x[0]), normalize_angle(x[1])
self.prev_alpha1 = x[0]
self.prev_alpha2 = x[1]
return self.caster_model_ukf(x, dt)
def hx(x):
# print "2: ", self.prev_alpha1
delta_alpha1 = x[0] - self.prev_alpha1
delta_alpha2 = x[1] - self.prev_alpha2
alpha1dot = delta_alpha1 / self.dt
alpha2dot = delta_alpha2 / self.dt
sol = self.meas_model(x[0], x[1], alpha1dot, alpha2dot)
return sol
self.ini_pose = [
self.wheel_cmd.angular.z, -self.wheel_cmd.linear.x, -self.odom_y,
self.odom_x, self.odom_th
]
self.save_pose_data.append(
[self.ini_pose[2], self.ini_pose[3], self.ini_pose[4]])
points = MerweScaledSigmaPoints(n=2, alpha=.1, beta=1., kappa=-1.)
kf = UKF(dim_x=2,
dim_z=2,
dt=self.dt,
fx=fx,
hx=hx,
points=points,
sqrt_fn=None,
x_mean_fn=self.state_mean,
z_mean_fn=self.meas_mean,
residual_x=self.residual_x,
residual_z=self.residual_z)
# self.ini_val = [normalize_angle(self.l_caster_angle-np.pi), normalize_angle(self.r_caster_angle-np.pi)]
self.ini_val = [3.1, -3.14]
self.save_caster_data.append(self.ini_val)
kf.x = np.array(self.ini_val) # initial mean state
kf.P *= 0.0001 # kf.P = eye(dim_x) ; adjust covariances if necessary
# kf.R *= 0
# kf.Q *= 0
zs = []
xs = []
# xs.append(self.ini_val)
count = 0
# print "Est1: ", normalize_angle(kf.x[0]+np.pi), normalize_angle(kf.x[1]+np.pi)
rospy.loginfo("Moving robot...")
last_odom_x = self.odom_x
last_odom_th = self.odom_th
start = rospy.get_time()
self.r.sleep()
while (rospy.get_time() - start <
self.move_time) and not rospy.is_shutdown():
curr_odom_x, curr_odom_th = self.odom_x, self.odom_th
delta_x, delta_th = curr_odom_x - last_odom_x, curr_odom_th - last_odom_th
z = np.array([delta_x / self.dt, delta_th / self.dt])
# z = np.array([self.odom_vx, self.odom_vth])
if count % self.factor == 0:
zs.append(z)
kf.predict()
kf.update(z)
xs.append([
normalize_angle(kf.x[0] + np.pi),
normalize_angle(kf.x[1] + np.pi)
])
# print "Est: ", normalize_angle(kf.x[0]+np.pi), normalize_angle(kf.x[1]+np.pi)
# print "Act: ", normalize_angle(self.l_caster_angle), normalize_angle(self.r_caster_angle)
self.save_caster_data.append(
[self.l_caster_angle, self.r_caster_angle])
self.save_pose_data.append(
[self.odom_x, self.odom_y, self.odom_th])
# print len(self.save_caster_data)
self.pub_twist.publish(self.wheel_cmd)
count += 1
last_odom_x, last_odom_th = curr_odom_x, curr_odom_th
self.r.sleep()
# Stop the robot
self.pub_twist.publish(Twist())
self.caster_sol_ukf = np.array(xs)
self.caster_sol_act = np.array(self.save_caster_data)
self.pose_act = np.array(self.save_pose_data)
# self.pose_act = np.reshape(self.pose_act, (len(self.save_pose_data), 3))
rospy.sleep(1)
def main():
np.set_printoptions(precision=3)
# Process Noise
q = np.eye(5)
q[0][0] = 0.001
q[1][1] = 0.001
q[2][2] = 0.001
q[3][3] = 0.001
q[4][4] = 0.001
# q[5][5] = 0.0025
realx = []
realy = []
realv = []
realtheta = []
realw = []
estimatex = []
estimatey = []
estimatev = []
estimatetheta = []
estimatew = []
estimate2y = []
estimate2x = []
estimatev2 = []
realyaw = []
estimateyaw = []
estimateyaw2 = []
realyawr = []
estimateyawr = []
estimateyawr2 = []
estimate3x = []
estimate3y = []
ex = []
ey = []
# create measurement noise covariance matrices
r_imu = np.zeros([1, 1])
r_imu[0][0] = 0.001
r_compass = np.zeros([1, 1])
r_compass[0][0] = 0.001
r_encoder = np.zeros([1, 1])
r_encoder[0][0] = 0.001
r_gpsx = np.zeros([1, 1])
r_gpsx[0][0] = 0.001
r_gpsy = np.zeros([1, 1])
r_gpsy[0][0] = 0.001
ini = np.array([0.000, 0.000, 0.000, 0.000, 0.000])
xest = np.array([[0.000], [0.000], [0.000], [0.000], [0.000]])
pest = np.eye(5)
jf = np.eye(5)
#ガウス分布の粒子の生成
p = 100
x_p = np.zeros((p, 5))
pw = np.zeros((p, 5))
x_p_update = np.zeros((p, 5))
z_p_update = np.zeros((p, 5))
for i in range(0, p):
x_p[i] = np.random.randn(5)
xp = np.zeros((1, 5))
# pass all the parameters into the UKF!
# number of state variables, process noise, initial state, initial coariance, three tuning paramters, and the iterate function
state_estimator = UKF(5, q, ini, np.eye(5), 0.04, 0.0, 2.0, iterate_x)
with open('example.csv', 'r') as csvfile:
reader = csv.reader(csvfile)
headers = next(reader)
last_time = 0
# read data
for row in reader:
row = [float(x) for x in row]
cur_time = row[0]
d_time = cur_time - last_time
real_state = np.array([row[i] for i in [5, 6, 3, 4, 2]])
# create an array for the data from each sensor
compass_hdg = row[9]
compass_data = np.array([compass_hdg])
encoder_vel = row[10]
encoder_data = np.array([encoder_vel])
gps_x = row[11]
gpsx_data = np.array([gps_x])
gps_y = row[12]
gpsy_data = np.array([gps_y])
imu_yaw_rate = row[8]
imu_data = np.array([imu_yaw_rate])
last_time = cur_time
observation_data = np.array([[row[11]], [row[12]], [row[10]],
[row[9]], [row[8]]])
observation_con = np.eye(5)
observation_con[0][0] = 0.001
observation_con[1][1] = 0.001
observation_con[2][2] = 0.001
observation_con[3][3] = 0.001
observation_con[4][4] = 0.001
# prediction is pretty simple
state_estimator.predict(d_time)
# updating isn't bad either
# remember that the updated states should be zero-indexed
# the states should also be in the order of the noise and data matrices
state_estimator.update([4], imu_data, r_imu)
state_estimator.update([3], compass_data, r_compass)
state_estimator.update([2], encoder_data, r_encoder)
state_estimator.update([1], gpsy_data, r_gpsy)
state_estimator.update([0], gpsx_data, r_gpsx)
#ekf
ret2 = state_estimator.motion_model(xest)
jf = state_estimator.jacobi(ret2)
xest, pest = state_estimator.ekf_estimation(
xest, pest, observation_data, observation_con, jf, ret2)
"""
#particle filter
for i in range(0,p):
x_p_update[i,:] = motion_model2(x_p[i,:])
z_p_update[i,:] = x_p_update[i,:]
pw[i] = cul_weight(observation_data,z_p_update[i,:])
sum1=0.000
sum2=0.000
sum3=0.000
sum4=0.000
sum5=0.000
for i in range(0,p):
sum1=sum1+pw[i,0]
sum2=sum1+pw[i,1]
sum3=sum1+pw[i,2]
sum4=sum1+pw[i,3]
sum5=sum1+pw[i,4]
#normalize
for i in range(0,p):
pw[i,0]=pw[i,0]/sum1
pw[i,1]=pw[i,1]/sum2
pw[i,2]=pw[i,2]/sum3
pw[i,3]=pw[i,3]/sum4
pw[i,4]=pw[i,4]/sum5
#resampling
for i in range(0,p):
u = np.random.rand(1,5)
qt1=np.zeros((1,5))
for j in range(0,p):
qt1=qt1+pw[j]
if np.all(qt1) > np.all(u):
x_p[i]=x_p_update[j]
break
xest2 =np.zeros((1,5))
for i in range(0,p):
xest2[0,0]=xest2[0,0]+x_p[i,0]
xest2[0,1]=xest2[0,1]+x_p[i,1]
xest2[0,2]=xest2[0,2]+x_p[i,2]
xest2[0,3]=xest2[0,3]+x_p[i,3]
xest2[0,4]=xest2[0,4]+x_p[i,4]
xest2[0,0] = xest2[0,0] / p
xest2[0,1] = xest2[0,1] / p
xest2[0,2] = xest2[0,2] / p
xest2[0,3] = xest2[0,3] / p
xest2[0,4] = xest2[0,4] / p
"""
print("----------------------------------------------------------")
print("Real state: ", real_state)
print("UKF Estimated state: ", state_estimator.get_state())
print("EKF Estimated state: ", xest.T)
ex.append(row[11])
ey.append(row[12])
realx.append(real_state[0])
realy.append(real_state[1])
estimatex.append(state_estimator.get_state(0))
estimatey.append(state_estimator.get_state(1))
realv.append(real_state[2])
estimatev.append(state_estimator.get_state(2))
estimate2x.append(xest[0, 0])
estimate2y.append(xest[1, 0])
estimatev2.append(xest[2, 0])
realyaw.append(real_state[3])
estimateyaw.append(state_estimator.get_state(3))
estimateyaw2.append(xest[3, 0])
realyawr.append(real_state[4])
estimateyawr.append(state_estimator.get_state(4))
estimateyawr2.append(xest[4, 0])
#figl=plt.figure(4)
#plt.subplot(411)
plt.plot(realx, realy, label="real_state")
plt.plot(estimatex, estimatey, label="ufk_estimator")
plt.plot(estimate2x, estimate2y, label="efk_estimator")
#plt.plot(ex,ey,label="estimator")
#plt.plot(estimate3x,estimate3y,label="pk_estimator")
plt.xlabel("x")
plt.ylabel("y")
plt.legend(loc="best")
#plt.xlim(0,2)
#plt.ylim(0,2)
"""
plt.subplot(412)
plt.plot(realv)
plt.plot(estimatev)
plt.plot(estimatev2)
plt.xlabel("sample")
plt.ylabel("v")
plt.subplot(413)
plt.plot(realyaw)
plt.plot(estimateyaw)
plt.plot(estimateyaw2)
plt.xlabel("sample")
plt.ylabel("yaw")
plt.subplot(414)
plt.plot(realyawr)
plt.plot(estimateyawr)
plt.plot(estimateyawr2)
plt.xlabel("sample")
plt.ylabel("yawr")
"""
sigma1 = 0
sigma2 = 0
sigma3 = 0
sigma4 = 0
sigma5 = 0
sigma6 = 0
sigma7 = 0
sigma8 = 0
sigma9 = 0
sigma10 = 0
for i in range(0, len(realx)):
sigma1 += (realx[i] - estimatex[i])**2
sigma2 += (realy[i] - estimatey[i])**2
sigma3 += (realx[i] - estimate2x[i])**2
sigma4 += (realx[i] - estimate2y[i])**2
sigma5 += (realx[i] - estimatev[i])**2
sigma6 += (realy[i] - estimatev2[i])**2
sigma7 += (realx[i] - estimateyaw[i])**2
sigma8 += (realx[i] - estimateyaw2[i])**2
sigma9 += (realx[i] - estimateyawr[i])**2
sigma10 += (realy[i] - estimateyawr2[i])**2
REME_x = math.sqrt(sigma1 / len(realx))
REME_y = math.sqrt(sigma2 / len(realx))
REME_x2 = math.sqrt(sigma3 / len(realx))
REME_y2 = math.sqrt(sigma4 / len(realx))
REME_v1 = math.sqrt(sigma5 / len(realx))
REME_v2 = math.sqrt(sigma6 / len(realx))
REME_y1 = math.sqrt(sigma7 / len(realx))
REME_y2 = math.sqrt(sigma8 / len(realx))
REME_yr1 = math.sqrt(sigma9 / len(realx))
REME_yr2 = math.sqrt(sigma10 / len(realx))
print("RMSE(ukf)_x=", REME_x, "RMSE(ekf)_x=", REME_x2)
print("RMSE(ukf)_y=", REME_y, "RMSE(ekf)_y=", REME_y2)
print("RMSE(ukf)_v=", REME_v1, "RMSE(ekf)_v=", REME_v2)
print("RMSE(ukf)_yaw=", REME_y1, "RMSE(ekf)_yaw=", REME_y2)
print("RMSE(ukf)_yawr=", REME_yr1, "RMSE(ekf)_yawr=", REME_yr2)
"""
def main():
np.set_printoptions(precision=3)
# Process Noise
q = np.eye(5)
q[0][0] = 0.001
q[1][1] = 0.001
q[2][2] = 0.004
q[3][3] = 0.025
q[4][4] = 0.025
# q[5][5] = 0.0025
realx = []
realy = []
realv = []
realtheta = []
realw = []
estimatex = []
estimatey = []
estimatev = []
estimatetheta = []
estimatew = []
estimate2y = []
estimate2x = []
# create measurement noise covariance matrices
r_imu = np.zeros([1, 1])
r_imu[0][0] = 0.01
r_compass = np.zeros([1, 1])
r_compass[0][0] = 0.02
r_encoder = np.zeros([1, 1])
r_encoder[0][0] = 0.001
r_gpsx = np.zeros([1, 1])
r_gpsx[0][0] = 0.1
r_gpsy = np.zeros([1, 1])
r_gpsy[0][0] = 0.1
ini = np.array([0, 0, 0.3, 0, 0.3])
# pass all the parameters into the UKF!
# number of state variables, process noise, initial state, initial coariance, three tuning paramters, and the iterate function
state_estimator = UKF(5, q, ini, np.eye(5), 0.04, 0.0, 2.0, iterate_x,
r_imu, r_compass, r_encoder, r_gpsx, r_gpsy)
xest = np.zeros((5, 1))
pest = np.eye(5)
jf = []
with open('example.csv', 'r') as csvfile:
reader = csv.reader(csvfile)
headers = next(reader)
last_time = 0
# read data
for row in reader:
row = [float(x) for x in row]
cur_time = row[0]
d_time = cur_time - last_time
real_state = np.array([row[i] for i in [5, 6, 3, 4, 2]])
# create an array for the data from each sensor
compass_hdg = row[9]
compass_data = np.array([compass_hdg])
encoder_vel = row[10]
encoder_data = np.array([encoder_vel])
gps_x = row[11]
gpsx_data = np.array([gps_x])
gps_y = row[12]
gpsy_data = np.array([gps_y])
imu_yaw_rate = row[8]
imu_data = np.array([imu_yaw_rate])
last_time = cur_time
observation_data = np.array(
[row[11], row[12], row[10], row[9], row[8]])
observation_datac = np.array([0.1, 0.1, 0.001, 0.02, 0.01])
# prediction is pretty simple
state_estimator.predict(d_time)
# updating isn't bad either
# remember that the updated states should be zero-indexed
# the states should also be in the order of the noise and data matrices
state_estimator.update([4], imu_data, r_imu)
state_estimator.update([3], compass_data, r_compass)
state_estimator.update([2], encoder_data, r_encoder)
state_estimator.update([1], gpsy_data, r_gpsy)
state_estimator.update([0], gpsx_data, r_gpsx)
jf = state_estimator.jacobi(xest)
xest, pest = state_estimator.ekf_estimation(
xest, pest, observation_data, observation_datac, jf)
print("--------------------------------------------------------")
print("Real state: ", real_state)
print("Estimated state: ", state_estimator.get_state())
print("Difference: ", real_state - state_estimator.get_state())
print("Estimated state2: ", xest)
realx.append(real_state[0])
realy.append(real_state[1])
estimatex.append(state_estimator.get_state(0))
estimatey.append(state_estimator.get_state(1))
realv.append(real_state[2])
estimatev.append(state_estimator.get_state(2))
estimate2x.append(xest[0])
estimate2y.append(xest[1])
figl = plt.figure(2)
plt.subplot(211)
plt.plot(estimatex, estimatey, "-b", label="ufk_estimator")
plt.plot(realx, realy, "-r", label="real_position")
plt.plot(estimate2x, estimate2y, "-g", label="efk_estimator")
plt.xlabel("x")
plt.ylabel("y")
plt.legend(loc="best")
plt.subplot(212)
plt.plot(realv, "-r", label="real_v")
plt.plot(estimatev, "-b", label="estimator_v")
plt.legend(loc="best")
if __name__ == "__main__":
delta_t = 1.
position = np.array([0., 0.])
velocity = np.array([0., 0.])
acceleration = np.array([1., 0.]) # randomly set ~N(0, 1)
variance = np.matlib.identity(2, dtype=float) * ahrs8_noise
measurement = np.array([0., 0.]) # randomly set ~N(position, 1)
true_acceleration = np.array([1., 0.])
true_velocity = np.array([0., 0.])
true_final_velocity = np.array([0., 0.])
true_position = np.array([0., 0.])
ukf = UKF(R, Q, G, H)
for i in range(1, 100):
acceleration = np.array([
gauss(true_acceleration[0], ahrs8_noise),
gauss(true_acceleration[1], ahrs8_noise)
])
final_velocity = np.array([
velocity[j] + (delta_t * acceleration[j])
for j in range(len(position))
])
#measurement = np.array([gauss(true_position[k], 0.1) for k in range(len(position))])
measurement = np.array([
true_position[k] + delta_t *
((final_velocity[k] + velocity[k]) / 2)
for k in range(len(position))
[twr.Getx()[1],
twr.Getx()[1] + body_radius * np.sin(twr.Getx()[2])])
robot_head.set_xdata(headx)
robot_head.set_ydata(heady)
fig.canvas.draw()
plt.pause(0.01)
if __name__ == "__main__":
# Two-Wheeled Robot Init
twr = TWR() # TWR model object
# Kalman Filter Init
ukf = UKF(twr.c, twr.nl)
body_radius = 0.3
fig, lines, lines_est, msensor, robot_body, robot_head = InitPlot(
twr, body_radius)
mu = ukf.mu
K = ukf.K
two_sig_x = np.array([[2 * np.sqrt(ukf.cov.item((0, 0)))],
[-2 * np.sqrt(ukf.cov.item((0, 0)))]])
two_sig_y = np.array([[2 * np.sqrt(ukf.cov.item((1, 1)))],
[-2 * np.sqrt(ukf.cov.item((1, 1)))]])
two_sig_theta = np.array([[2 * np.sqrt(ukf.cov.item((2, 2)))],
[-2 * np.sqrt(ukf.cov.item((2, 2)))]])
for i in range(int(twr.t_end / twr.dt)):
# truth model updates
twr.Propagate()