作者:林 靜(1982-),女,廣東茂名人,副教授,碩士,現就職于茂名職業技術學院,研究方向為信號處理與智能檢測。
摘要:在伺服系統中,運用PID算法對系統進行參數的調節,使得系統能滿足相應要求。將系統分為三部分進行分析,首先對系統進行分析方法的選擇(滿足最小相位系統條件),其次對伯德圖以及相對裕量分析,最后進行相位裕量的分析,從而確定該系統的穩定性能情況。采用PID算法對原系統進行校正使系統的振蕩次數(N)、最大超調量(σ)和調整時間(ts)減小,余差(ess)為零,性能達到最優。
關鍵詞:PID算法;MATLAB;相對裕量;伯德圖
Abstract: In the servo system, PID algorithm is used to adjust the parameters of the system, so that the system can meet the corresponding requirements required in the application. The system is divided into three parts for analysis. First, the analysis method of the system is selected to meet the minimum phase system condition. Secondly, the Bode diagram and relative margin analysis. Finally, the phase margin analysis is carried out to determine the stability of the system. PID algorithm is used to correct the original system to reduce the number of oscillations (N), the maximum overshoot (σ) and the adjustment time (ts) of the system, and the residual error (ess) is zero. The performance is optimal.
Key words: PID algorithm; MATLAB; Relative margin; Bode diagram
摘自《自動化博覽》2020年10月刊