WEI Yunbing¹   WANG Wanliang¹  ZHAO Yanwei¹    HUANG Jin²

(1. College of Information Engineering, Zhejiang University of Technology, Hangzhou 310014；

2. College of Electrical Engineering, Zhejiang University, Hangzhou 310027)

Abstract: The essential theory of the mechanical characteristic test of the wiper motor without torque and speed sensors is discussed in this paper. The relationship between wavelet ridge and instantaneous frequency is analyzed and a new method of the mechanical characteristic test of the wiper motor based on wavelet ridge algorithm is proposed. Experimental results show that the mechanical characteristic curve of the wiper motor can be rapidly and exactly acquired based on wavelet ridge.

Key words:Wavelet ridge  Instantaneous frequency  Wiper motor  Mechanical characteristic test

CLC No: TM306

国家自然科学基金资助项目(50307011, 60374056). Received 20050614, received in revised form  20051130