Angular position test system of electromechanical convertor based on Mlx90316

ZHU He， LI Sheng， RUAN Jian
（Key Laboratory of Special Equipment and Advanced Manufacturing Technology， Ministry of Education，
 Zhejiang University of Technology， Hangzhou 310014， China）

Abstract： In order to improving the response speed and accuracy of the electro-hydraulic servo control system，the angular position test technique was investigated into the closed-loop control of the electromechanical converter. The signal of the stepper motor's position was added as the control parameter，and the position closed-loop control was made.After the analysis of Hall's angular position test and decoding technique，according to the timing requirements of Mlx90316，a non-contact angular position test system of the electromechanical convertor was established. Within the TMS320F2812 DSP as the master controller，the related functional modules were developed，the PID control strategy was used，the software and the hardware were done，a system that has stepper motor's position feedback and control circuit was built. The results show that the test speed is 2 800 fp/s，and the accuracy is as high as 12 bit. The system fits wide speed range and has high measurement speed and accuracy.
Key words： electromechanical convertor； angular position test； Mlx90316