joint_torque_springs.py 文件源码

def attach_springs(self):
        """
        Switches to joint torque mode and attached joint springs to current
        joint positions.
        """
        # record initial joint angles
        self._start_angles = self._limb.joint_angles()

        # set control rate
        control_rate = rospy.Rate(self._rate)

        # for safety purposes, set the control rate command timeout.
        # if the specified number of command cycles are missed, the robot
        # will timeout and return to Position Control Mode
        self._limb.set_command_timeout((1.0 / self._rate) * self._missed_cmds)

        # loop at specified rate commanding new joint torques
        while not rospy.is_shutdown():
            if not self._rs.state().enabled:
                rospy.logerr("Joint torque example failed to meet "
                             "specified control rate timeout.")
                break
            self._update_forces()
            control_rate.sleep()