Add gimbal gazebo plugin, applying in task1 to stabilize the camera.

jsk_mbzirc_tasks/CMakeLists.txt

@@ -21,9 +21,23 @@ include_directories(include ${catkin_INCLUDE_DIRS} ${GAZEBO_INCLUDE_DIRS})
 add_executable(uav_teleop_keyboard src/uav_teleop_keyboard.cpp)
 target_link_libraries(uav_teleop_keyboard ${catkin_LIBRARIES})
 
+# build plugins
+add_library(mbzirc_gazebo_gimbal_plugin src/mbzirc_gazebo_gimbal_plugin.cpp)
+target_link_libraries(mbzirc_gazebo_gimbal_plugin ${GAZEBO_LIBRARIES} ${catkin_LIBRARIES} ${Boost_LIBRARIES})
+
+#############
+## Install ##
+#############
+
 #############
 ## Install ##
 #############
+install(TARGETS
+  mbzirc_gazebo_gimbal_plugin
+  DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
+  LIBRARY DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
+  )
+
 install(DIRECTORY launch urdf config
   DESTINATION ${CATKIN_PACKAGE_SHARE_DESTINATION}
   USE_SOURCE_PERMISSIONS)

jsk_mbzirc_tasks/include/jsk_mbzirc_tasks/mbzirc_gazebo_gimbal_plugin.h

@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2016, JSK Robotics Laboratory, The University of Tokyo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the Willow Garage, Inc. nor the names of its
+ *       contributors may be used to endorse or promote products derived from
+ *       this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef JSK_MBZIRC_TASKS_MBZIRC_GAZEBO_GIMBAL_PLUGIN_H
+#define JSK_MBZIRC_TASKS_MBZIRC_GAZEBO_GIMBAL_PLUGIN_H
+
+#include <gazebo/common/Plugin.hh>
+#include <gazebo/common/Time.hh>
+#include <gazebo/math/Quaternion.hh>
+#include <gazebo/common/Events.hh>
+#include <gazebo/physics/physics.hh>
+
+// ROS
+#include <ros/ros.h>
+#include <ros/callback_queue.h>
+#include <tf/transform_broadcaster.h>
+#include <tf/transform_listener.h>
+#include <geometry_msgs/QuaternionStamped.h>
+#include <sensor_msgs/JointState.h>
+#include <geometry_msgs/Twist.h>
+#include <sensor_msgs/Imu.h>
+#include <nav_msgs/Odometry.h>
+#include <std_srvs/Empty.h>
+
+// Boost
+#include <boost/thread.hpp>
+#include <boost/bind.hpp>
+
+#include <cmath>
+#include <string>
+
+namespace gazebo
+{
+class GazeboGimbal : public ModelPlugin
+{
+public:
+  GazeboGimbal();
+  virtual ~GazeboGimbal();
+
+protected:
+  virtual void Load(physics::ModelPtr _model, sdf::ElementPtr _sdf);
+  virtual void Update();
+  virtual void Reset();
+
+private:
+  struct Servo
+  {
+    std::string name;
+    math::Vector3 axis;
+    physics::JointPtr joint;
+    float filter_command;
+    float i_term;
+    float velocity;
+    float angle;
+    Servo() : velocity() {}
+  }
+    servos_[3];  // the special style of roslint
+
+  ros::NodeHandle* node_handle_;
+
+  ros::Subscriber imu_subscriber_;
+  ros::Subscriber state_subscriber_;
+  ros::Publisher joint_state_pub_;
+  tf::TransformListener* transform_listener_;
+
+  ros::CallbackQueue callback_queue_;
+  common::Time prev_update_time_;
+  event::ConnectionPtr update_connection_;
+
+  physics::WorldPtr world_;
+  physics::LinkPtr link_;
+  std::string link_name_;
+
+  math::Quaternion rotation_;
+  geometry_msgs::QuaternionStamped::ConstPtr current_cmd_;
+  sensor_msgs::JointState joint_state_;
+
+  ros::Time state_stamp_;
+  math::Pose pose_;
+  math::Vector3 euler_;
+
+  std::string namespace_;
+  std::string imu_topic_;
+  std::string state_topic_;
+
+  // parameters
+  std::string robot_name_space_;
+  std::string topic_name_;
+  std::string joint_state_name_;
+  common::Time control_period_;
+
+  float proportional_controller_gain_;
+  float derivative_controller_gain_;
+  float integral_controller_gain_;
+  double maximum_velocity_;
+  float maximum_torque_;
+  double time_constant_;
+
+  unsigned int count_of_servos_;
+  unsigned int order_of_axes_[3];
+
+  void calculateVelocities(double dt);
+  void publish_joint_states();
+  float updatePID(Servo* servo, float new_input, float x, float dx, float dt);
+
+  void imuCallback(const sensor_msgs::ImuConstPtr&);
+  void stateCallback(const nav_msgs::OdometryConstPtr&);
+};
+}  // namespace gazebo
+
+#endif  // JSK_MBZIRC_TASKS_MBZIRC_GAZEBO_GIMBAL_PLUGIN_H