基于衰減頻率特性的PID參數(shù)優(yōu)化整定研究
Researching the Tuning Optimization of PID Parameters Based on Attenuated Frequency Characteristi

摘要:用衰減頻率特性法整定PID控制器可使閉環(huán)系統(tǒng)獲得要求的衰減比，但是求得的整定參數(shù)的解是不確定的，因而難以確定最佳整定參數(shù)。就此，將基于衰減頻率特性的PID控制器整定問題轉(zhuǎn)換成帶衰減比約束的控制器參數(shù)優(yōu)化問題，首先用Matlab計(jì)算出整定參數(shù)的解曲線或解曲面，然后利用Simulink在仿真環(huán)境下尋優(yōu)，獲得期望性能下的最佳整定參數(shù)。仿真結(jié)果表明所提出的整定方法有效，且控制器具有良好的抗干擾能力。
關(guān)鍵詞:PID控制器參數(shù)整定衰減頻率特性尋優(yōu)抗干擾性

Abstract; The desired attenuation ratio of a closed loop system can be obtained through tuning the PID controler場using atenuated frequency characteristic. However, it is difficult to determine the optimum tuning parameters due to the obtained solutions of tuning parameters are uncertain. A novel tuning method of PID controler is proposed the way of optimizing controller parameters with a constraint of atenuation ratio as as ubstitutefo rth atof ca lculatingth ec ontrolerp arametersw itha tenuatedf requencyc haracteristic.W itht hism ethod,fi rstlyc urveso rc urved surfaces of the solutions were worked out by using Matlab, then optimization was performed with Simulink to find out the optimum tuning parameters for expected performance. The simulation results demonstrate the validity of the proposed method and the high anti-interference capability of the controler.
Keywords;P IDc ontroler Parametertu ning Attenuatedfr equencyc haracteristic Optimization Anti-interference