靜液壓傳動系統之控制與實驗分析

Control and Experiment Analysis of Hydrostatic Transmission Systems

張書瑋(Shu-Wei Zhang)

指導教授 ： 許坤寶

國立虎尾科技大學/工程學院/機械與機電工程研究所/碩士(2008年)

摘要

本論文針對靜液壓傳動系統做一研究，進而設計一控制器控制該系統轉速以及提昇系統的抗干擾性。主要使用的控制法則為類神經網路、適應性控制以及滑動模式控制，配合系統原動機轉速的變化與外部干擾的影響，調整靜液壓傳動系統中液壓泵與液壓馬達的排量變化，以調變系統輸出的轉速。
控制器的設計主要是根據靜液壓傳動系統轉速訊號，控制液壓泵與液壓馬達的排量以及調整控制器的參數。利用個人電腦進行實驗平台各機構的控制，進行不同轉速及負載的模擬與實驗來調整控制器的參數，讓控制器發出正確的命令，將系統最佳的運轉狀態。
實驗結果顯示，在使用二次轉速系統調節系統進行煞車能量回收方面，透過蓄壓器確實可回收並儲存能量。而本文所提出的ANFSMC控制器，隨著系統的外部干擾變化以及原動機轉速變化，可以有效的控制靜液壓傳動系統的輸出轉速，以AC馬達代替內燃機引擎，在輸入轉速於一定範圍內的情形下，控制系統輸出轉速，證明本文所設計的控制系統在使用內燃機引擎作為原動機時，可使內燃機運作在燃油經濟效益高的轉速範圍內，利用靜液壓傳動系統與ANFSMC控制器可得到所需的轉速變化與穩定輸出。

關鍵字

靜液壓傳動系統 ； 二次轉速調節系統 ； 適應性類神經模糊滑動模式控制

並列摘要

The research was aimed at the control of the hydrostatic transmission systems, This study used the controller called “Adaptive Neural Fuzzy Sliding Mode Controller (ANFSMC)” to control the rotational speed of the system and maintain its robustness.
Using the speed of the power source and hydraulic motor as inputs, the fuzzy theory combined with sliding mode and neural network is adopted as the basic algorithm to control the displacement of the hydraulic pump and hydraulic motor. The Matlab/simulink and VC++ program is used to design the PC-based controller and experiments.
The experimental results show that the kinetic energy of the flywheel can be transmitted through the hydraulic motor to the hydraulic accumulator by implementing the secondary velocity-regulated system during braking, It is possible to in incorporate energy storage into the power-train to improve the driving performance and efficiency. Hence, considering vehicle jerk, the operation of the hydrostatic transmission system using secondary velocity-regulated system can result in improved fuel economy and performance using the proposed ANFSMC.

並列關鍵字

hydrostatic transmission systems ； secondary velocity-regulated system ； Adaptive Neural Fuzzy Sliding mode Controller

參考文獻

【1】 Gray, Jr., Hydraulic hybrid vehicle, United States Patent, US6719080 B1, 2004.

【2】 John S. Cundiff, Fluid Power Circuits and Controls, CRC Press.

【3】 Wilson W.E., ”Control Systems for Hydrostatic Transmissions,” Machine Design, Vol.40, No.8, pp.141-144, 1968.

【4】 Merritt, Herbert E., Hydraulic Control Systems, Wiley, New York, 1967.

【5】 Yu Jinghong, Chen Zhaoneng, Lu Yuanzhang, “The variation of oil effective bulk modulus with pressure in hydraulic systems,” Journal of Dynamic Systems, Measurement, and Control, Transactions of ASME, Vol. 116, pp.146-150, 1994.