ROS: No p gain specified for pid. Namespace: /gazebo_ros_control/pid_gains/shoulder_pitch_joint
运行 gazebo_ros_control.launch时， 错误如下： [ERROR] [1571212497.739111392, 0.166000000]: No p gain specified for pid. Namespace: /gazebo_ros_control/pid_gains/shoulder_pitch_joint [ERROR] [1571212497.744784033, 0.166000000]: No p gain specified for pid. Namespace: /gazebo_ros_control/pid_gains/elbow_roll_joint [ERROR] [1571212497.747626326, 0.166000000]: No p gain specified for pid. Namespace: /gazebo_ros_control/pid_gains/elbow_pitch_joint [ERROR] [1571212497.749455772, 0.166000000]: No p gain specified for pid. Namespace: /gazebo_ros_control/pid_gains/wrist_roll_joint [ERROR] [1571212497.751916855,