本研究的目標是開發複合動力系統之引擎發展控制策略,針對引擎性能曲線,制定引擎最佳效率運轉點,藉由電子節氣門(Electronic Throttle Control, ETC)位置控制及引擎轉速控制器,使引擎啓動後維持在最佳運轉點。節氣門位置控制器之設計,應用遞迴最小平方演算法(Recursive Least Square, RLS)預估近似節氣門之二階轉移函數模型,以尼克士調整法(Ziegler-Nichols tuning rules)設計,經由模擬計算出PID控制器的增益值並實驗調整,節氣門位置控制器亦加入一前饋補償(feedforward control)控制,克服在自然開度(LH position)磁滯問題(hysterisis),使節氣門能準確且快速達到任何欲開啓的角度。轉速控制器之設計,應用適應性引擎轉速控制器,並藉著RLS隨時預估引擎的參數,並修改調校轉速控制器之參數,由模擬及實驗結果顯示出,適應性轉速控制器較比例積分控制器佳。 在軟體設備方面,使用Matlab/Simulink建立動態模型,並將設計好的控制器參數,應用Motohawk在Matlab/Simulink內建立控制器模型程式,實現節氣門位置控制器及引擎轉速控制器,在硬體設備,採用Mototron公司所發展的ECU555-80為研究之引擎電腦控制單元,並以華擎公司1.3L引擎做為控制器驗證之引擎。
The target of the research is to develop engine speed control for hybrid electronic vehicle. According to engine map, we defined a sweet spot of the experiment engine and proposed to keep the engine running at the sweet spot by controlling Electronic Throttle Control (ETC) precisely. The Recursive Least Square technique is employed to identify the ETC as a second-order linear model. Ziegler-Nichols tuning method is used to design the ETC opening controller. Besides, the ETC opening controller also combines a feedforward control to solve the serious problem of hysterisis at the limp-home (LH) position. Therefore, the ETC opening controller makes it reach any required position fast and precisely. Furthermore, the proposed engine speed control is an adaptive controller. The Recursive Least Square technique is employed to identify the engine as a first-order linear model. Pole placement technique is then used to design the adaptive controller. Performances of the traditional PI control and proposed algorithms are evaluated using a nonlinear engine model in Matlab/Simulink and engine experiment. The simulated and experimental results show that the transient speed of the proposed algorithm deviates less than that of the traditional one under the presence of torque disturbance. In software, Matlab/Simulink is employed to build the dynamic model and to design the control parameters. Motohawk, a toolbox in Matlab/Simulink is utilized to design ETC opening controller and engine speed controller. In addition, China Engine Company 1.3L is used as the experiment engine and ECU555-80 developed by Mototron Coporation is used as the engine control unit.