- 學位論文
高速射出油壓伺服系統調控響應 特性之探討
A Study on the Regulating Response Characteristics of Hydraulic Servo System for the High-Speed Injection Molding
摘要
摘 要 本論文為研究高速射出油壓伺服系統，針對調控射出速度的方法，並設計一組類似熔膠射出阻力的負載系統，來探討系統發生延遲時間和反應時間的因素對系統響應特性的影響。 為了瞭解系統的響應特性，在本研究中，分別透過類比式和數位式PID控制放大器做PI控制，並架設以LabVIEW軟體撰寫的人機介面監控裝置，擷取埋設在油壓缸後端內LVDT的訊號。另使用HyPneu軟體模擬和設計多組的負載，以研究影響速度響應的原因。 實驗結果顯示，系統在速度閉迴路控制且穩定的前提下，透過PI控制且使速度上升時間縮的愈短的控制策略，其反應時間也就愈短；而隨著射出系統負載的增加，反應時間會有增加的趨勢；並且藉由不同PID控制放大器的差異性，在不同速度命令下，找出影響系統之延遲時間的最大因素為滑軸反應的初始速度。本研究的結果期以提供高速射出成型機之研究者在系統開發時，對性能要求設計上的一個參考依據。
並列摘要
Abstract This paper presents the study of hydraulic servo system for the high-speed injection molding. The purpose of research is study the influence of delay and reaction time to response characteristics of system. The methods of regulated injection speed collocate with and without melt load were addressed. In this study, we utilized PI control by analog and digital V/P control cards to understand the response characteristics of system. The human-computer interface through LabVIEW software was also developed to collect LVDT signal. In addition, to discuss the reason of effecting speed response through the HyPneu software simulation. The results show that under velocity closed-loop control, stable and stepping up the PI velocity control, the response time system will be quickly. On the other hand, large melt load will increase the response time. Moreover, under different velocity commands and V/P control cards, it can be seen that the maximum factor to affect delay time of system was initial velocity of spool. The results of this study provide a better design rule and function for designers and operators to develop a high-speed injection molding machine with hydraulic servo system.