Design and realization of detection channel for angular acceleration of AT output shaft

DONG Zhu-rong1，2， LIANG Song-feng1， HE Ping1
（1. Department of Automotive and Transportation Engineering， Shenzhen Polytechnic， Shenzhen 518055， China；
2. School of Mechanical， Electronic and Control Engineering， Beijing Jiaotong University， Beijing 100044，　China）

Abstract： Aiming at the causes of automobile automatic transmission shift shock，output shaft angular acceleration detection channel for automobile automatic transmission performance testing bench was designed，including channel structure，signal processing hardware circuits and corresponding detection software program. Aiming at corresponding signal processing circuits，Newton interpolation method was adopted to deduce angular acceleration calculation formula and establish angular acceleration mathematical model. LabVIEW software program of angular acceleration algorithm based on Newton interpolation method was developed. Corresponding output shaft test data was acquired by means of bench test，algorithmic program was analyzed and compared with calculation results of Matlab. The results indicate that both the software and hardware design of the detection channel have good real-time attribute and accuracy.
Key words： automatic transmission（AT）；test-bed；angular acceleration；Newton interpolation algorithm；LabVIEW；Matlab