Research Of The Testing Platform For Oil-Damper Based On AC Servo System

The increasing operating speed of the railway locomotive and vehicle put a higher demand on the dynamic performance of the train.Accordingly,the performance indexes of the oil-damper should be improved,because,the oil-damper is a key part for ameliorating the dynamic performance of the train and improving the comfortable degree of the passenger.At present,we have imported and produced multifold oil-dampers which can satisfy the demand of high-speed railway,and established a new standard of railway industry for testing the oil-damper.As the testing equipment of the oil-damper, the oil-damper test-bed should be invented urgently. In order to provide convenience for the engineers or researchers when they study on the performance of the oil-damper,the paper aims to constructing a measurement and control platform for oil-damper testing,which can be easily used and is suitable for the high-speed railway. According to the relevant technical requirements, the whole scheme of the testing platform for the oil-damper is researched on, and the working principle of the platform is specified based on the scheme.The paper designs the hardware and software of the measurement&control system for the test-bed.Hardware part begins with the introduction of the hardware structure of the system. Then,the data acquisition and control unit has been designed and implemented in detail,which is the hardcore of the system and includes the Intel 80C196 MCU-based dual CPUs module, switching signal interface circuit, limiting guarding circuit and CAN communication interface circuit. Meanwhile, the paper focuses on the function and the hardware implement of the signal modulation unit and the position regulator.Finaly, the paper introduces the anti-interference measurements which are used in the process of hardware designing.The software of the lower computer for the measurement&control system is composed and its detailed flowcharts are illustrated. The manner of software program is written by assemble language, which includes the main CPU program and the SPWM signal generated program.The fundamental principle of PMSM vector control strategy and SVPWM algorithm are studied. According to these theories, the paper simulates the AC servo system of the test-bed, and then analyses the simulation results.A testing system is constructed, in which the no-load test and simulation test are carried out. Experimental results show that the oil-damper test-bed which is designed by...