why the nonlinear model of a small UAV cant give correct results when using a discret PID?
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hi, i have a nonlinear model of a small UAV controlled by PID controller, when using the continuous PID, it gives the desired results, but when using the discret version of the PID controller, it doesnt give results.
the discret version of the PID is implemented using the xilinx system generator and it is correct because we tried with other models and it gave us good results.
so, i dont konw where is the problem exactly? we tried with changing the sampling time, as we tried to make a lot of changes, but no results?? i hope from you to give me a a solution thank you very much
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David Sanchez
2013-5-8
Hi, what do you mean by "it doesn't give results"? Does that mean the UAV becomes unstable or that the system crashes? If the UAV becomes unstable with the discrete PID, I think you should re-tune the PID parameters and/or adjust the sample time. I had a similar problem time ago and it worked for me. Good luck
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