ros_controllers problems

asked 2013-10-01 19:08:19 -0600

Enrico Mingo
121 ●20 ●21 ●27 http://www.iit.it/it/p...

Hi, I am writing a description of my robot combining xacros, gazebos and yamls files. I have some troubles with my controllers and sensors.

About sensors: I am tring to add an IMU in my robot. I have a link "imulink" in my xacro and a fixed joint "imujoint" between imu_link and another link in my robot. Now, in my robot.gazebo file I have the following:

< gazebo > < plugin name="imu_sensor_controller" filename="libgazebo_ros_imu.so" > < bodyName >imu_link< /bodyName > < always_on >1< /always_on > < !-- update_rate >1000.0< /update_rate -- > < robotNamespace >/COMAN< /robotNamespace > < topicName >coman_imu< /topicName > < /plugin > < /gazebo >

and in my robot_control.yaml I have:

imu_sensor_controller: type: imu_sensor_controller/ImuSensorController publish_rate: 50

In the launch file for the controller I use the controllermanager spawner to spawn the imusensor_controller. When I launch it I have the following error from GAZEBO:

[ERROR] [1380671129.134196839]: This controller requires a hardware interface of type 'hardware_interface::ImuSensorInterface'. Make sure this is registered in the hardware_interface::RobotHW class.

I think I have to put this in my transmission.urdf.xacro but I do not well know where is he syntax for the imu hardware interface. Do you have some suggestion? Maybe I am wronging something?

Thank you for your help.

Enrico

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<gazebo> <plugin name="quadrotor_imu_sim" filename="libhector_gazebo_ros_imu.so"> <updateRate>100.0</updateRate> <bodyName>imu_link</bodyName> <topicName>COMAN/raw_imu</topicName> <rpyOffsets>0 0 0</rpyOffsets>  <gaussianNoise>0</gaussianNoise>  <accelDrift>0.5 0.5 0.5</accelDrift> <accelGaussianNoise>0.35 0.35 0.3</accelGaussianNoise> <rateDrift>0.1 0.1 0.1</rateDrift> <rateGaussianNoise>0.05 0.05 0.015</rateGaussianNoise> <headingDrift>0.1</headingDrift> <headingGaussianNoise>0.05</headingGaussianNoise> </plugin> </gazebo> </robot>

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Does this IMU plugin simulate realistic data? I tried to simulate my IMU with "libgazebo\_ros\_imu.so", but the simulated data doesnt look very good....

psei ( 2013-10-10 05:52:13 -0600 )edit

Can you start a new question, and elaborate on "doesn't look very good"?

nkoenig ( 2013-10-10 10:31:02 -0600 )edit

Hello nkoenig, see http://answers.gazebosim.org/question/4717/imu-sensor-plugin-libgazebo_ros_imuso-strange-data/

psei ( 2013-10-14 07:27:17 -0600 )edit

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