autonomous rover- no motors, just servo for steering and actuator for braking- rolling down hill

Posted by john smith on March 19, 2017 at 11:55am

The objective is to build an autonomous gravity racer (no motors, just rolling down a hill) to go through several waypoints. Autonomy through GPS and magnetometer.

Was wondering if anyone can direct me a little in terms of how the coding to control the brakes for steering around corners, using an actuator, can be implemented.

Also, if how the servo and actuators are connected in the attached planned schematic is appropriate.


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Tags: 26, apm, gravity, racer
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Replies

  • Ray Quintana March 20, 2017 at 9:51pm

    Output 3 but yeah that's how I would do it.  You're a little bit out of my standard R/C car based wheelhouse but I imagine you would get the desired result doing it that way.  Something that big I would have some sort of remote emergency brake on too, just in case.


    john smith said:

    Thanks!!
    So in terms of wiring, the brakes/actuators should be connected to APM input 3 and then calibrated/set using mission planner?

    Yeah it's going to be a 20kg racer and the actuators that are going to be used run off 12V, so it seemed appropriate to have 3s Lipos. I'm a bit new to this, so any help will be much appreciated


    Ray Quintana said:

    Not too sure about your diagram but I imagine you could use your brake on the throttle channel and just set it so full throttle = brake off and brake applies the brakes as expected.  It looks like you are planning on using some pretty heavy duty brake parts there based on the fact you want to give each one its own 3s lipo.

  • john smith March 20, 2017 at 11:12am

    Thanks!!
    So in terms of wiring, the brakes/actuators should be connected to APM input 3 and then calibrated/set using mission planner?

    Yeah it's going to be a 20kg racer and the actuators that are going to be used run off 12V, so it seemed appropriate to have 3s Lipos. I'm a bit new to this, so any help will be much appreciated


    Ray Quintana said:

    Not too sure about your diagram but I imagine you could use your brake on the throttle channel and just set it so full throttle = brake off and brake applies the brakes as expected.  It looks like you are planning on using some pretty heavy duty brake parts there based on the fact you want to give each one its own 3s lipo.

  • Ray Quintana March 19, 2017 at 7:59pm

    Not too sure about your diagram but I imagine you could use your brake on the throttle channel and just set it so full throttle = brake off and brake applies the brakes as expected.  It looks like you are planning on using some pretty heavy duty brake parts there based on the fact you want to give each one its own 3s lipo.

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