| The retarder was equiped with railway by 1960s. we started to research it by the end of 1970s. And, the facility which examine the retarder is fogyism. The most of methods is that we estimate it by experience. Partially, we check it with apparatus out of the door where we can use the railcar. The method has lower efficiency which may waste many time and money. Some of the institute or corporation has designed the equipment with using indoor. But it has some demerit, for example , it still need more rooms , the proceeding of experimentation loads down with trivial details. It can not be seasoned by the practice.This thesis puts forward a new ideal equipment by using a hydraulic actuating cylinder to impact the retarder, which tally with the active state of it, and base on the studying relevant workings. 1 design a digital servo valve clique and participate in designing the servo-valve control system of the clique. And it is applied to it in the retarder examined system successfully. The dynamic and static characteristics of the control system and hydraulic system are investigated by simulation. The effect is also discussed when the parameter in the system has been changed. It will offer a theoretics direction which can upgrade the performance.The main tasks of this paper are as follows.Chapter 1 makes a summary of the retarder's structure and examination method. then introduces the purpose, meaning and creative point of this thesis.Chapter 2 introduces the whole design project of system included the digital servo valve,the soft of the control system.Chapter 3 describes the mathematical model of the digital servo valve control asymmetry fluid cylinker. And expound how to simulate the system by Matlab.Chapter 4 is about the experiment and the conclusion based on the new equipment. It seems that the conclusion of simulation and the experiment are such adjacence which means the theoretics being identical with the fact basically.Chapter 5 is the summarization of this papper and prospect.
|
PDF Full Text Request