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PID Autotuning Based on Saturation Function Feedback with A Static Load Disturbance  

Oh, Seung- Rohk (단국대학교 전기전자컴퓨터공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.51, no.12, 2002 , pp. 542-548 More about this Journal
Abstract
We consider an unknown linear time invariant plan with static load disturbance. A saturation function nonlinear element is sued to find th one point information in the frequency domain. We analyze an asymmetric self-oscillation caused by static load disturbance with relay feedback and saturation function feedback. We propose a new method to tune a PID controller using a saturation nonlinear feedback element in the presence of asymmetric oscillation. The proposed method does not require the knowledge of plant d.c. gain with an asymmetric oscillation in the plat output.
Keywords
PID controller; autotuning; saturation function; static load; ocsillation;
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