class Supervisor(object):
"""
Steps: P = placement, G = grasp, p = pre-P, g = pre-G
0. P <-> GP
1. P <-> gP
2. gP <-> GP
3. GP <-> G
4. GP <-> Gp
5. Gp <-> G
"""
##
# \param lpTasks list of low priority tasks. If None, a Posture task will be used.
# \param hpTasks list of high priority tasks (like balance)
def __init__(self, sotrobot, lpTasks=None, hpTasks=None):
self.sotrobot = sotrobot
self.hpTasks = hpTasks if hpTasks is not None else _hpTasks(sotrobot)
self.lpTasks = lpTasks if lpTasks is not None else _lpTasks(sotrobot)
self.currentSot = None
from dynamic_graph.sot.core.switch import SwitchVector
self.sot_switch = SwitchVector("sot_supervisor_switch")
plug(self.sot_switch.sout, self.sotrobot.device.control)
from agimus_sot.events import Events
self.done_events = Events("done", sotrobot)
self.error_events = Events("error", sotrobot)
self.done_events.setupNormOfControl(sotrobot.device.control, 1e-2)
self.done_events.setupTime(
) # For signal self. done_events.timeEllapsedSignal
self.error_events.setupTime(
) # For signal self.error_events.timeEllapsedSignal
def makeInitialSot(self):
# Create the initial sot (keep)
from .solver import Solver
sot = Solver('sot_keep', self.sotrobot.dynamic.getDimension())
self.keep_posture = Posture("posture_keep", self.sotrobot)
self.keep_posture._task.setWithDerivative(False)
self.keep_posture._signalPositionRef(
).value = self.sotrobot.dynamic.position.value
self.keep_posture.pushTo(sot)
sot.doneSignal = self.done_events.controlNormSignal
sot.errorSignal = False
self.addSolver("", sot)
## Set the robot base pose in the world.
# \param basePose a list: [x,y,z,r,p,y] or [x,y,z,qx,qy,qz,qw]
# \return success True in case of success
def setBasePose(self, basePose):
if len(basePose) == 7:
# Currently, this case never happens
from dynamic_graph.sot.tools.quaternion import Quaternion
from numpy.linalg import norm
q = Quaternion(basePose[6], basePose[3], basePose[4], basePose[5])
if abs(norm(q.array) - 1.) > 1e-2:
return False, "Quaternion is not normalized"
basePose = basePose[:3] + q.toRPY().tolist()
if self.currentSot == "" or len(basePose) != 6:
# We are using the SOT to keep the current posture.
# The 6 first DoF are not used by the task so we can change them safely.
self.sotrobot.device.set(
tuple(basePose + list(self.sotrobot.device.state.value[6:])))
self.keep_posture._signalPositionRef(
).value = self.sotrobot.device.state.value
return True
else:
return False
## \name SoT managements
## \{
def addPreAction(self, name, preActionSolver):
self.preActions[name] = preActionSolver
self._addSignalToSotSwitch(preActionSolver)
def addSolver(self, name, solver):
self.sots[name] = solver
self._addSignalToSotSwitch(solver)
def duplicateSolver(self, existingSolver, newSolver):
self.sots[newSolver] = self.sots[existingSolver]
def addPostActions(self, name, postActionSolvers):
self.postActions[name] = postActionSolvers
for targetState, pa_sot in postActionSolvers.iteritems():
self._addSignalToSotSwitch(pa_sot)
## This is for internal purpose
def _addSignalToSotSwitch(self, solver):
n = self.sot_switch.getSignalNumber()
self.sot_switch.setSignalNumber(n + 1)
self.sots_indexes[solver.name] = n
plug(solver.control, self.sot_switch.signal("sin" + str(n)))
def _plug(e, events, n, name):
assert events.getSignalNumber() == n, "Wrong number of events."
events.setSignalNumber(n + 1)
events.setConditionString(n, name)
if isinstance(e, (bool, int)):
events.conditionSignal(n).value = int(e)
else:
plug(e, events.conditionSignal(n))
_plug(solver.doneSignal, self.done_events, n, solver.name)
_plug(solver.errorSignal, self.error_events, n, solver.name)
def _selectSolver(self, solver):
n = self.sots_indexes[solver.name]
self.sot_switch.selection.value = n
self.done_events.setSelectedSignal(n)
self.error_events.setSelectedSignal(n)
## \}
def topics(self):
c = self.hpTasks + self.lpTasks
for g in self.grasps.values():
c += g
for p in self.placements.values():
c += p
return c.topics
def plugTopicsToRos(self):
from dynamic_graph.ros.ros_queued_subscribe import RosQueuedSubscribe
self.rosSubscribe = RosQueuedSubscribe('ros_queued_subscribe')
from dynamic_graph.ros.ros_tf_listener import RosTfListener
self.rosTf = RosTfListener('ros_tf_listener')
topics = self.topics()
for name, topic_info in topics.items():
topic_handler = _handlers[topic_info.get("handler", "default")]
topic_handler(name, topic_info, self.rosSubscribe, self.rosTf)
def printQueueSize(self):
exec("tmp = " + self.rosSubscribe.list())
for l in tmp:
print(l, self.rosSubscribe.queueSize(l))
## Check consistency between two SoTs.
#
# This is not used anymore because it must be synchronized with the real-time thread.
# \todo Re-enable consistency check between two SoTs.
def isSotConsistentWithCurrent(self, transitionName, thr=1e-3):
if self.currentSot is None or transitionName == self.currentSot:
return True
csot = self.sots[self.currentSot]
nsot = self.sots[transitionName]
t = self.sotrobot.device.control.time
# This is not safe since it would be run concurrently with the
# real time thread.
csot.control.recompute(t)
nsot.control.recompute(t)
from numpy import array, linalg
error = array(nsot.control.value) - array(csot.control.value)
n = linalg.norm(error)
if n > thr:
print("Control not consistent:", linalg.norm(error), '\n', error)
return False
return True
def clearQueues(self):
self.rosSubscribe.readQueue(-1)
exec("tmp = " + self.rosSubscribe.list())
for s in tmp:
print('{} queue size: {}'.format(s,
self.rosSubscribe.queueSize(s)))
self.rosSubscribe.clearQueue(s)
## Wait for the queue to be of a given size.
# \param minQueueSize (integer) waits to the queue size of rosSubscribe
# to be greater or equal to \c minQueueSize
# \param timeout time in seconds after which to return a failure.
# \return True on success, False on timeout.
def waitForQueue(self, minQueueSize, timeout):
ts = self.sotrobot.device.getTimeStep()
to = int(timeout / self.sotrobot.device.getTimeStep())
from time import sleep
start_it = self.sotrobot.device.control.time
exec("queues = " + self.rosSubscribe.list())
for queue in queues:
while self.rosSubscribe.queueSize(queue) < minQueueSize:
if self.sotrobot.device.control.time > start_it + to:
return False, "Queue {} has received {} points.".format(
queue, self.rosSubscribe.queueSize(queue))
sleep(ts)
return True, ""
## Start reading values received by the RosQueuedSubscribe entity.
# \param delay (integer) how many periods to wait before reading.
# It allows to give some delay to network connection.
# \param minQueueSize (integer) waits to the queue size of rosSubscribe
# to be greater or equal to \p minQueueSize
# \param duration expected duration (in seconds) of the queue.
# \param timeout time in seconds after which to return a failure.
# \return success, time boolean, SoT time at which reading starts (invalid if success is False)
#
# \warning If \p minQueueSize is greater than the number of values to
# be received by rosSubscribe, this function does an infinite loop.
def readQueue(self, delay, minQueueSize, duration, timeout):
from time import sleep
print("Current solver {0}".format(self.currentSot))
if delay < 0:
print("Delay argument should be >= 0")
return False, -1
minSizeReached, msg = self.waitForQueue(minQueueSize, timeout)
if not minSizeReached:
return False, -1
durationStep = int(duration / self.sotrobot.device.getTimeStep())
t = self.sotrobot.device.control.time + delay
self.rosSubscribe.readQueue(t)
self.done_events.setFutureTime(t + durationStep)
self.error_events.setFutureTime(t + durationStep)
return True, t
def stopReadingQueue(self):
self.rosSubscribe.readQueue(-1)
# \return success, time boolean, SoT time at which reading starts (invalid if success is False)
def plugSot(self, transitionName, check=False):
if check and not self.isSotConsistentWithCurrent(transitionName):
# raise Exception ("Sot %d not consistent with sot %d" % (self.currentSot, id))
print("Sot {0} not consistent with sot {1}".format(
self.currentSot, transitionName))
if transitionName == "":
self.keep_posture._signalPositionRef(
).value = self.sotrobot.dynamic.position.value
solver = self.sots[transitionName]
# No done events should be triggered before call
# to readQueue. We expect it to happen with 1e6 milli-seconds
# from now...
devicetime = self.sotrobot.device.control.time
self.done_events.setFutureTime(devicetime + 100000)
self._selectSolver(solver)
print("{0}: Current solver {1}\n{2}".format(devicetime, transitionName,
solver.sot.display()))
self.currentSot = transitionName
if hasattr(self, 'ros_publish_state'):
self.ros_publish_state.transition_name.value = transitionName
return True, devicetime
# \return success, time boolean, SoT time at which reading starts (invalid if success is False)
def runPreAction(self, transitionName):
if self.preActions.has_key(transitionName):
solver = self.preActions[transitionName]
t = self.sotrobot.device.control.time + 2
self.done_events.setFutureTime(t)
self._selectSolver(solver)
print("{0}: Running pre action {1}\n{2}".format(
t, transitionName, solver.sot.display()))
return True, t - 2
print("No pre action", transitionName)
return False, -1
## Execute a post-action
# \return success, time boolean, SoT time at which reading starts (invalid if success is False)
def runPostAction(self, targetStateName):
if self.postActions.has_key(self.currentSot):
d = self.postActions[self.currentSot]
if d.has_key(targetStateName):
solver = d[targetStateName]
devicetime = self.sotrobot.device.control.time
self.done_events.setFutureTime(devicetime + 2)
self._selectSolver(solver)
print("{0}: Running post action {1} --> {2}\n{3}".format(
devicetime, self.currentSot, targetStateName,
solver.sot.display()))
return True, devicetime
print("No post action {0} --> {1}".format(self.currentSot,
targetStateName))
return False, -1
def getJointList(self, prefix=""):
return [prefix + n for n in self.sotrobot.dynamic.model.names[1:]]
def publishState(self, subsampling=40):
if hasattr(self, "ros_publish_state"):
return
from dynamic_graph.ros import RosPublish
self.ros_publish_state = RosPublish("ros_publish_state")
self.ros_publish_state.add("vector", "state", "/agimus/sot/state")
self.ros_publish_state.add("vector", "reference_state",
"/agimus/sot/reference_state")
self.ros_publish_state.add("string", "transition_name",
"/agimus/sot/transition_name")
self.ros_publish_state.transition_name.value = ""
plug(self.sotrobot.device.state, self.ros_publish_state.state)
plug(self.rosSubscribe.posture, self.ros_publish_state.reference_state)
self.sotrobot.device.after.addDownsampledSignal(
"ros_publish_state.trigger", subsampling)
class ControllerSwitch:
def __init__ (self,name,controllers,threshold_up,threshold_down):
"""
Use controller 0 until the condition signal value becomes greater than threshold.
Then use controller 1. Manually switch between controller using the latch.
OFF means controller 0 and ON means controller 1.
Currently support only two controllers.
- controllers: output signal of a controller
"""
self.reverse = (threshold_up < threshold_down)
# any(threshold_up < measured_torque) => torque control
self._condition_up = CompareVector (name + "_condition_up")
self._condition_up.setTrueIfAny(True)
self._condition_up.sin1.value = threshold_up
self._condition_up.sin2.value = threshold_up
# all(measured_torque < threshold_down) => position control
self._condition_down = CompareVector (name + "_condition_down")
self._condition_down.setTrueIfAny(False)
self._condition_down.sin1.value = threshold_down
self._condition_down.sin2.value = threshold_down
self._event_up = Event (name + "_event_up")
self._event_down = Event (name + "_event_down")
self._event_up .setOnlyUp(True);
self._event_down .setOnlyUp(True);
self._latch = Latch(name + "_latch")
self._latch.turnOff()
self._switch = SwitchVector (name + "_switch")
self._switch.setSignalNumber(len(controllers))
plug(self._condition_up .sout, self._event_up .condition)
plug(self._condition_down.sout, self._event_down.condition)
plug(self._latch.out , self._switch.boolSelection)
# This is necessary to initialize the event (the first recompute triggers the event...)
self._event_up.check.recompute(0)
self._event_down.check.recompute(0)
self._event_up .addSignal (name + "_latch.turnOnSout")
self._event_down.addSignal (name + "_latch.turnOffSout")
for n, sig in enumerate(controllers):
plug(sig, self.signalIn(n))
def setMeasurement (self,sig):
if self.reverse:
plug(sig, self._condition_up .sin1)
plug(sig, self._condition_down.sin2)
else:
plug(sig, self._condition_up .sin2)
plug(sig, self._condition_down.sin1)
@property
def thresholdUp (self):
if self.reverse:
return self._condition_up .sin2
else:
return self._condition_up .sin1
@property
def thresholdDown (self):
if self.reverse:
return self._condition_down.sin1
else:
return self._condition_down.sin2
@property
def signalOut (self): return self._switch.sout
def signalIn (self, n): return self._switch.signal("sin" + str(n))
@property
def conditionUp (self): return self._condition_up
@property
def conditionDown (self): return self._condition_down
@property
def eventUp (self): return self._event_up
@property
def eventDown (self): return self._event_down
@property
def latch (self): return self._latch
@property
def switch (self): return self._switch
