摘要:傳統(tǒng)的繼電振蕩PID 參數(shù)自整定方法由于在整定期間要使系統(tǒng)處于臨界振蕩狀態(tài)，并且整定周期較長，限制了在許多工業(yè)控制過程中的應(yīng)用。介紹了一種基于開關(guān)階躍響應(yīng)算法的PID 參數(shù)自整定控制器，通過在實際溫度控制系統(tǒng)的應(yīng)用，與繼電振蕩PID 參數(shù)自整定算法以及Modicon PLC 的PID 參數(shù)自整定模塊進行分析比較，證明該算法在安全性及整定時間上明顯優(yōu)于其他兩種算法。
關(guān)鍵詞自整定控制器PID 控制階躍響應(yīng)繼電振蕩
Abstract Conventional relay feedback PID self-tuning leads processes into critical oscillation which is not permitted in industrial control systems，and it is time-consuming to get PID parameters. In this paper，a new PID auto-tuner based on switched step responses algorithm is presented. Through a practical temperature control system，the PID auto-tuner using switched step responses is compared with the relay feedback auto-tuner and the PID auto-tuning module of Modicon PLC. Results of the temperature test show that the new auto-tuner is better in security and faster than those of the others.
Keywords Autotune controller PID control Step response Relay feedback