class RosCar():
def __init__(self, cfg):
self.STEERING_NEUTRAL = cfg['servo_neutral_angle']
self.MIN_STEERING_ANGLE = cfg[
'servo_min_angle_limit'] # Steering left/right max angle.
self.MAX_STEERING_ANGLE = cfg[
'servo_max_angle_limit'] # Steering left/right max angle.
self.STEERING_RATE = cfg[
'steering_rate'] # Server steering angle is fomula angle. But car_client depends on car. Drift type steering, normal steering, etc. Therefore, use this rate for ajust good angle.
self.MOTOR_NEUTRAL_SPEED = cfg['motor_neutral_speed']
self.MOTOR_FORWARD_SPEED_RATE = float(
cfg['motor_max_speed_limit']
) / float(
100
) # Server max speed is 100. But car_client depends on config parameter.
self.MOTOR_BACK_SPEED_RATE = float(
cfg['motor_min_speed_limit']
) / float(
-100
) # Server min speed is -100. But car_client depends on config parameter.
self.steering = Servo(cfg)
self.motor = Motor(cfg)
self.steering.set_angle(self.STEERING_NEUTRAL, delay=0)
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
self.speed = self.MOTOR_NEUTRAL_SPEED
self.back_in = False
self.back_start_time = None
return
def __del__(self):
self.steering.set_angle(self.STEERING_NEUTRAL, delay=0)
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
return
def listener(self):
"""
READ ROS TOPICS AND RUN FUNCTION BY HZ.
rosnode list
rosnode info /twist_filter
rostopic echo /cmd_vel
"""
rospy.init_node('ROSCarNano', anonymous=True)
rospy.Subscriber('/cmd_vel', Twist, self.cmd_vel)
# spin() simply keeps python from exiting until this node is stopped
rospy.spin()
return
def cmd_vel(self, values):
"""
ステアリング・速度のターゲット値の処理
ステアリング値のomegaはターゲット角速度である。現在の速度を加味してomegaを算出しなければならない
self.target_speed: target speed (m/s)
"""
"""
Autoware 1.9.1にバック機能は無い。
そのため速度は負の値は正の値として扱う。
"""
print("/cmd_vel: {}".format(values))
speed = abs(values.linear.x)
target_speed = map(speed, 0.0, 0.22, 0.0, 30.0)
"""
Autowareの角速度は右カーブがマイナス、左カーブがプラス。
omega: rad/s and 10 Hz
1 processing = 1 Hz = 0.1 * omega
left/right = -1 * omega
"""
omega = values.angular.z
"""
omegaはtarget_speedが時速2kmの時、ベストマッチ。
速度が上がった時、それに応じてomegaを減算させる。
"""
print("omega: {} speed: {}".format(omega, speed))
self.set_speed(target_speed)
self.set_angle_rad(omega)
return
def omega_to_angle(self, omega):
"""
角速度ωをサーボ可動域に変換する。
omegaは右カーブがマイナス、左カーブがプラス。
サーボは右カーブが90-180度、左カーブが0-90度となるため、
omegaの正負を逆にしてdegreeに変換してから90度加える。
ω(rad/s)
θ= ω*180/pi (deg/s)
rad = θ*pi/180
"""
omega = -1.0 * omega
theta = float(omega) * float(180) / math.pi
angle = 90.0 - (180.0 - theta) / 2.0
return angle
def set_angle_rad(self, omega):
"""
omega: rad/s
"""
steering_angle = self.omega_to_angle(omega)
#print("omega to angle: {} -> {}".format(omega, steering_angle))
steering_angle = int(float(steering_angle) * float(self.STEERING_RATE))
steering_angle = self.STEERING_NEUTRAL + steering_angle
"""
Adjust within operable angle
"""
if steering_angle > self.MAX_STEERING_ANGLE:
steering_angle = self.MAX_STEERING_ANGLE
if steering_angle < self.MIN_STEERING_ANGLE:
steering_angle = self.MIN_STEERING_ANGLE
print("steering: {}".format(steering_angle))
self.steering.set_angle(steering_angle)
def set_speed(self, speed):
"""
speed: Analog int value for PCA9685
"""
motor_speed = speed
if motor_speed > 0:
motor_speed = int(
float(motor_speed) * float(self.MOTOR_FORWARD_SPEED_RATE))
elif motor_speed < 0:
motor_speed = int(
float(motor_speed) * float(self.MOTOR_BACK_SPEED_RATE))
self.motor.set_speed(motor_speed)
def brake(self, value):
if value.data:
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
def main():
print("start")
motor = None
try:
"""
LOAD SETUP VARIABLES
"""
cfg = load_config()
motor = Motor(cfg)
"""
# NEUTRAL ANALOG RANGE: 370-393
neutral = 370
print(motor.analog_to_pulse(neutral))
neutral = 393
print(motor.analog_to_pulse(neutral))
# FORWARD MAXIMUM ANALOG VALUE: 280
analog = 280
print(motor.analog_to_pulse(analog))
# BACKWARD MAXIMUM ANALOG VALUE: 440
analog = 440
print(motor.analog_to_pulse(analog))
"""
# FORWARD: 369(START) - 280(MAX SPEED)
motor.set_speed(0)
time.sleep(2)
speed = 0
"""
for i in range(100):
speed += 1
motor.set_speed(speed)
print(motor.get_speed())
time.sleep(0.1)
for i in range(100):
speed -= 1
motor.set_speed(speed)
print(motor.get_speed())
time.sleep(0.1)
"""
# Setting the "BACKWARD" value to the value will apply the brake. (It is probably the function of ESC.)
# BACKWORD: 394(START) - 440(MAX SPEED)
speed = -30 # 30% backword throttle
delay = 5.0
for i in range(2):
speed = 30 # 30% throttle
motor.set_speed(speed, delay)
time.sleep(2.5)
speed = 0
motor.set_speed(speed, delay)
time.sleep(2.5)
motor.set_speed(0)
time.sleep(2)
except:
import traceback
traceback.print_exc()
finally:
if motor is not None:
motor.set_speed(0)
time.sleep(3)
print("end")
class RosCar():
def __init__(self, cfg):
self.STEERING_NEUTRAL = cfg['servo_neutral_angle']
self.MIN_STEERING_ANGLE = cfg[
'servo_min_angle_limit'] # Steering left/right max angle.
self.MAX_STEERING_ANGLE = cfg[
'servo_max_angle_limit'] # Steering left/right max angle.
self.STEERING_RATE = cfg[
'steering_rate'] # Server steering angle is fomula angle. But car_client depends on car. Drift type steering, normal steering, etc. Therefore, use this rate for ajust good angle.
self.MOTOR_NEUTRAL_SPEED = cfg['motor_neutral_speed']
self.MOTOR_FORWARD_SPEED_RATE = float(
cfg['motor_max_speed_limit']
) / float(
100
) # Server max speed is 100. But car_client depends on config parameter.
self.MOTOR_BACK_SPEED_RATE = float(
cfg['motor_min_speed_limit']
) / float(
-100
) # Server min speed is -100. But car_client depends on config parameter.
self.steering = Servo(cfg)
self.motor = Motor(cfg)
self.steering.set_angle(self.STEERING_NEUTRAL, delay=0)
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
self.speed = self.MOTOR_NEUTRAL_SPEED
return
def __del__(self):
self.steering.set_angle(self.STEERING_NEUTRAL, delay=0)
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
return
def listener(self):
"""
ROS Topicの更新時に処理を行う設定
rosnode list
rostopic echo /cmd_vel
rostopic echo /ackermann_cmd
"""
rospy.init_node('ROSCarNano', anonymous=True)
"""
アッカーマン運動力学
"""
ackermann = AckermannPublisher()
ackermann.add()
rospy.Subscriber('/ackermann_cmd', AckermannDriveStamped,
self.ackermann_cmd)
# spin() simply keeps python from exiting until this node is stopped
rospy.spin()
return
def ackermann_cmd(self, values):
"""
ステアリング・速度のターゲット値の処理
ステアリング値のsteering_angleは角度(rad)なので、degreeに変換する
speed: m/s
target_speed: motor power %
# map(指示を受けた速度(m/s), 指示速度の後方最高速度m/s, 指示速度の最高速度m/s, モーター後方最高出力%, モーター前方最高出力%)
# ここでは前後モーター最高出力は100%として、デバイス設定時に車両設定の速度制限を適用する。
"""
print("/ackermann_cmd: {}".format(values))
#speed = abs(values.drive.speed) # no backwords
speed = values.drive.speed
target_speed = map(speed, -0.28, 0.28, -100.0, 100.0)
"""
ステアリング角
アッカーマン運動力学のステアリング角を利用する
"""
angle_rad = values.drive.steering_angle
self.set_speed(target_speed)
self.set_angle_rad(angle_rad)
def rad_to_angle(self, angle_rad):
"""
angle_radをサーボ可動域に変換する。
angle_radは右カーブがマイナス、左カーブがプラス。
サーボは右カーブが90-180度、左カーブが0-90度となるため、
angle_radの正負を逆にしてdegreeに変換してから90度加える。
ω(rad/s)
θ= angle_rad*180/pi (deg/s)
rad = θ*pi/180
"""
angle_rad = -1.0 * angle_rad
theta = float(angle_rad) * float(180) / math.pi
angle = 90.0 - (180.0 - theta) / 2.0
return angle
def set_angle_rad(self, angle_rad):
"""
omega: rad/s
"""
steering_angle = self.rad_to_angle(angle_rad)
#print("omega to angle: {} -> {}".format(omega, steering_angle))
steering_angle = int(float(steering_angle) * float(self.STEERING_RATE))
steering_angle = self.STEERING_NEUTRAL + steering_angle
"""
Adjust within operable angle
"""
if steering_angle > self.MAX_STEERING_ANGLE:
steering_angle = self.MAX_STEERING_ANGLE
if steering_angle < self.MIN_STEERING_ANGLE:
steering_angle = self.MIN_STEERING_ANGLE
print("steering: {}".format(steering_angle))
self.steering.set_angle(steering_angle)
def set_speed(self, speed):
"""
speed: Analog int value for PCA9685
"""
motor_speed = speed
if motor_speed > 0:
motor_speed = int(
float(motor_speed) * float(self.MOTOR_FORWARD_SPEED_RATE))
elif motor_speed < 0:
motor_speed = int(
float(motor_speed) * float(self.MOTOR_BACK_SPEED_RATE))
print("motor: {}".format(motor_speed))
self.motor.set_speed(motor_speed)
def brake(self, value):
if value.data:
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
class RosCar():
def __init__(self, cfg):
self.STEERING_NEUTRAL = cfg['servo_neutral_angle']
self.MIN_STEERING_ANGLE = cfg[
'servo_min_angle_limit'] # Steering left/right max angle.
self.MAX_STEERING_ANGLE = cfg[
'servo_max_angle_limit'] # Steering left/right max angle.
self.STEERING_RATE = cfg[
'steering_rate'] # Server steering angle is fomula angle. But car_client depends on car. Drift type steering, normal steering, etc. Therefore, use this rate for ajust good angle.
self.MOTOR_NEUTRAL_SPEED = cfg['motor_neutral_speed']
self.MOTOR_FORWARD_SPEED_RATE = float(
cfg['motor_max_speed_limit']
) / float(
100
) # Server max speed is 100. But car_client depends on config parameter.
self.MOTOR_BACK_SPEED_RATE = float(
cfg['motor_min_speed_limit']
) / float(
-100
) # Server min speed is -100. But car_client depends on config parameter.
self.steering = Servo(cfg)
self.motor = Motor(cfg)
self.steering.set_angle(self.STEERING_NEUTRAL, delay=0)
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
return
def listener(self):
"""
READ ROS TOPICS AND RUN FUNCTION BY HZ.
angle_deg: -45 to 45
speed_deg: -100 to 100
brake_bool: True or False
"""
rospy.init_node('RoboCarROS', anonymous=True)
rospy.Subscriber('/steer/angle_deg', Int8, self.set_angle)
rospy.Subscriber('/motor/speed_deg', Int8, self.set_speed)
rospy.Subscriber('/motor/brake_bool', Bool, self.brake)
# spin() simply keeps python from exiting until this node is stopped
rospy.spin()
return
def set_angle(self, angle):
"""
angle.data: -45 to 45 degree.
"""
steering_angle = angle.data
steering_angle = int(float(steering_angle) * float(self.STEERING_RATE))
steering_angle = self.STEERING_NEUTRAL + steering_angle
"""
Adjust within operable angle
"""
if steering_angle > self.MAX_STEERING_ANGLE:
steering_angle = self.MAX_STEERING_ANGLE
if steering_angle < self.MIN_STEERING_ANGLE:
steering_angle = self.MIN_STEERING_ANGLE
self.steering.set_angle(steering_angle)
def set_speed(self, speed):
motor_speed = speed.data
if motor_speed > 0:
motor_speed = int(
float(motor_speed) * float(self.MOTOR_FORWARD_SPEED_RATE))
elif motor_speed < 0:
motor_speed = int(
float(motor_speed) * float(self.MOTOR_BACK_SPEED_RATE))
self.motor.set_speed(motor_speed)
def brake(self, value):
if value.data:
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
class RosCar():
def __init__(self, cfg):
self.STEERING_NEUTRAL = cfg['servo_neutral_angle']
self.MIN_STEERING_ANGLE = cfg['servo_min_angle_limit'] # Steering left/right max angle.
self.MAX_STEERING_ANGLE = cfg['servo_max_angle_limit'] # Steering left/right max angle.
self.STEERING_RATE = cfg['steering_rate'] # Server steering angle is fomula angle. But car_client depends on car. Drift type steering, normal steering, etc. Therefore, use this rate for ajust good angle.
self.MOTOR_NEUTRAL_SPEED = cfg['motor_neutral_speed']
self.MOTOR_FORWARD_SPEED_RATE = float(cfg['motor_max_speed_limit'])/float(100) # Server max speed is 100. But car_client depends on config parameter.
self.MOTOR_BACK_SPEED_RATE = float(cfg['motor_min_speed_limit'])/float(-100) # Server min speed is -100. But car_client depends on config parameter.
self.steering = Servo(cfg)
self.motor = Motor(cfg)
self.steering.set_angle(self.STEERING_NEUTRAL, delay=0)
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
self.speed = self.MOTOR_NEUTRAL_SPEED
self.back_in = False
self.back_start_time = None
self.target_speed = self.MOTOR_NEUTRAL_SPEED
return
def __del__(self):
self.steering.set_angle(self.STEERING_NEUTRAL, delay=0)
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)
return
def listener(self):
"""
READ ROS TOPICS AND RUN FUNCTION BY HZ.
rosnode list
rosnode info /twist_filter
rostopic echo /twist_cmd
"""
rospy.init_node('RoboCarROS', anonymous=True)
rospy.Subscriber('/twist_cmd', TwistStamped, self.twist_cmd)
# current_velocity
rospy.Subscriber('/current_velocity', TwistStamped, self.current_velocity)
# spin() simply keeps python from exiting until this node is stopped
rospy.spin()
return
def current_velocity(self, values):
"""
現在速度と目標速度を比較して、モーター出力を調整する。
self.speed: モーター出力
current_velocity: 現在速度
self.target_speed: 目標速度
"""
current_velocity = values.twist.linear.x
print("speed now: {} target: {}".format(current_velocity, self.target_speed))
if current_velocity < self.target_speed:
self.speed += 1
elif current_velocity > self.target_speed:
self.speed -= 1
if self.speed >= 100:
self.speed = 100
elif self.speed <= 0:
self.speed = 0
"""
現在速度が0.1(m/s)未満の時、急発進を抑えるためにモーター出力を制限する。
"""
if self.speed > 25 and current_velocity < 0.1:
self.speed = 25
self.set_speed(self.speed)
return
def twist_cmd(self, values):
"""
ステアリング・速度のターゲット値の処理
ステアリング値はここで適用する
速度は変数で保持し、current_velocityによる現在速度取得時に適用する
ステアリング値のomegaはターゲット角速度である。現在の速度を加味してomegaを算出しなければならない
self.target_speed: target speed (m/s)
"""
#print(values)
"""
Autoware 1.9.1にバック機能は無い。
そのため速度は負の値は正の値として扱う。
"""
speed = abs(values.twist.linear.x)
self.target_speed = speed
"""
Autowareの角速度は右カーブがマイナス、左カーブがプラス。
omega: rad/s and 10 Hz
1 processing = 1 Hz = 0.1 * omega
left/right = -1 * omega
"""
omega = values.twist.angular.z
"""
omegaはtarget_speedが時速2kmの時、ベストマッチ。
速度が上がった時、それに応じてomegaを減算させる。
"""
print("before omega: {} speed: {}".format(omega, speed))
if self.target_speed >= 0.56:
"""
目標速度が時速2km(0.56m/s)以上の時、比率に応じてomegaを小さくする
"""
ratio = map(self.target_speed, 2.0, 1000.0, 1.0, 1000.0)
omega = omega*ratio
print("after omega: {} speed: {}".format(omega, speed))
self.set_angle_rad(omega)
return
def omega_to_angle(self, omega):
"""
角速度ωをサーボ可動域に変換する。
omegaは右カーブがマイナス、左カーブがプラス。
サーボは右カーブが90-180度、左カーブが0-90度となるため、
omegaの正負を逆にしてdegreeに変換してから90度加える。
ω(rad/s)
θ= ω*180/pi (deg/s)
rad = θ*pi/180
"""
omega = -1.0 * omega
theta = float(omega)*float(180)/math.pi
angle = 90.0 - (180.0 - theta)/2.0
return angle
def set_angle_rad(self, omega):
"""
omega: rad/s
"""
steering_angle = self.omega_to_angle(omega)
#print("omega to angle: {} -> {}".format(omega, steering_angle))
steering_angle = int(float(steering_angle) * float(self.STEERING_RATE))
steering_angle = self.STEERING_NEUTRAL + steering_angle
"""
Adjust within operable angle
"""
if steering_angle > self.MAX_STEERING_ANGLE:
steering_angle = self.MAX_STEERING_ANGLE
if steering_angle < self.MIN_STEERING_ANGLE:
steering_angle = self.MIN_STEERING_ANGLE
print("steering: {}".format(steering_angle))
self.steering.set_angle(steering_angle)
def set_speed(self, speed):
"""
speed: Analog int value for PCA9685
"""
motor_speed = speed
if motor_speed > 0:
motor_speed = int(float(motor_speed) * float(self.MOTOR_FORWARD_SPEED_RATE))
elif motor_speed < 0:
motor_speed = int(float(motor_speed) * float(self.MOTOR_BACK_SPEED_RATE))
self.motor.set_speed(motor_speed)
def brake(self, value):
if value.data:
self.motor.set_speed(self.MOTOR_NEUTRAL_SPEED, delay=0)