| Title |
PID Autotuning Based on Saturation Function Feedback with A Static Load Disturbance |
| Keywords |
PID controller ; autotuning ; saturation function ; static load ; ocsillation |
| 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. |