電液伺服閥之射出速度控制

The Ejection Speed Control of Hydraulic Servo Valve

林昆緯(Kun-Wei Lin)

指導教授 ： 林鴻裕 ； 蔡循恒

國立屏東科技大學/工學院/機械工程系所/碩士(2012年)

https://doi.org/10.6346/NPUST.2012.00243

摘要

本研究主要目的是使用工業界常用的PID控制器，有效控制電液伺服閥之射出速度，使射出成型機的實際射出速度可以更容易達到預設射出速度，完成最佳化控制。
研究實驗分為兩大部分，其一為直接使用單體法於射出成型機所內建的PID控制器參數調整上。其二為對電液伺服閥進行系統識別，估測出系統的數學模型，並運用軟體模擬開迴路系統與單體PID控制，最後進行射出成型機的實機驗證，確認此數學模型的正確性。由實驗結果得知單體法確實能減少調整PID參數的時間，並且透過系統識別更可以得知射出系統之模型，達到讓單體法自行運算的效果，求取最佳PID參數。

關鍵字

電液伺服閥 ； 系統識別 ； 單體法

並列摘要

The main purpose of this study is to use PID controller commonly used in industry to effectively control the velocity of injection on hydraulic servo valve. By controlling, it can be easier to adjust the actual injection speed to meet the preset injection speed on the injection molding machine, and then finish the optimum control.
The experiment of this study can be divided into two parts. In first part, we directly used simplex method to adjust the parameters of PID controller on the injection molding machine; in second part, we carried out the system identification on hydraulic servo valve, to estimate the mathematical model of the system. And then we simulated the open-loop system and did simplex method on PID control by the software. Finally, we made testing to confirm correctness of this model on the injection molding machine.
The results of experiment showed that simplex method can really reduce the time for adjusting the parameters of PID controller, and we can know the model of inject system by using system identification. It generated the effect that simplex method can be computed on its own way, and then found the optimum PID parameters.

並列關鍵字

Hydraulic servo valve ； System identification ； Simplex method

參考文獻

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