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I am a programmer by profession and new to Robotics. I have studied ECE, so know electronics, but not very familiar with mechanical aspects of robotics. I am working on a learning project with Dagu Rover 5 platform.

I am trying to control the 4 DC motors with PWM and want to use the optical encoders for feedback. I am looking for some algorithms, example code in C to effectively control the rover. I know how to control the GPIO, PWM and interrupts from the processor. I am more interested in learning the algorithm that controls the motors based on this. For now, i am working on a manual robot, controlled with up/down/left/right keys. In future, I would like to add sensors, camera etc and work on autonomous aspects. Any pointers would be helpful.

For reference, I am working on the Raspberry Pi platform to control the rover.

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closed as primarily opinion-based by Bending Unit 22, Mark Booth Apr 15 '16 at 9:51

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ The word "control" can mean a lot of things in robotics. For instance are you asking how you send commands to the robot or how ensure the motors do what you intend them to do? $\endgroup$ – DaemonMaker Sep 21 '13 at 17:29
  • $\begingroup$ This question needs a bit more focus. What specific thing would you like the robot to do? That will guide the choice of algorithm. $\endgroup$ – Ian Sep 28 '13 at 18:34
  • $\begingroup$ you could be more specific in the project you are creating? what are the skills you want the robot? logarithms are many that can be used. I would like to accompany you $\endgroup$ – Andrea Andrea Apr 14 '16 at 0:54
  • $\begingroup$ On Robotics, we prefer practical, answerable questions based on actual problems that you face, so it is a good idea to include details of what what you would like to achieve, what you have tried, what you expected to see & what you actually saw. Please take a look at How to Ask & tour for more information on how stack exchange works and work through the Robotics question checklist to edit your question to make it clearer. $\endgroup$ – Mark Booth Apr 15 '16 at 9:51
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Specifically about control of motors by PWM, you should learn about the PID controller.

The sky's the limit for what you want to learn about. Find a robotics simulator to start playing around with algorithms -- otherwise you will find that you will spend all year building the robot instead.

For a mobile robot, motion planning or mapping algorithms would be a good start.

Real sensors are noisy and ambiguous, so machine learning (i.e. statistical, fuzzy learning) is a whole field you can look at if you're interested, with applications in control, motion planning, and vision processing. How much time do you have?

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  • $\begingroup$ Thanks..! Can you point me to some online material which is good for beginners? $\endgroup$ – Punit Soni Sep 27 '13 at 18:12

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