Research On The Testing Method Of Servo Control Subassembly

The servo control subassembly, which is made up of four individual but combined boards such as the gyro board, the servo control board, the power amplification board, and the communication board, is a core of electric cabinet of the servo control system in a certain weaponry equipment and plays the role of stabilizing, searching and track of the rotary table. A series of factory checking and testing must be done for the servo control subassembly, the result of which has a direct impact on the properties of the weaponry equipment. In order to guarantee the testing quality and the authority of the malfunctions testing on the servo control subassembly, their interior signals are usually tested one by one manually in the course of the manufacturing, debugging and daily maintenance, which not only wastes a lot of human and material resources, but also is dramatically limited by such factors as circumstances, time and environments. As a result, it is obvious that all this cannot meet the special demands of this weaponry system.The issue of this paper originates from the assembly line in the China Airborne Missile Academy, in which the testing system is specifically designed for measuring the servo control subassembly. The study aims to achieve three purposes. Firstly, based on the analysis of the systematic functions and the main technical indicators of the integrated testing system in detail and by means of uniting the modern testing technology and computer technology, the study puts forward an overall project. Based on the"camera obscura"testing theory, by using the on-line test as a major means and the off-line test as a minor means, the project designs a general testing module based on the virtual instrument (VI) and basic testing module on the basis of the digital signal processor (DSP) and the complex programmable logical device (CPLD) with regard to the principles of standardization, modularization, versatility and openness. In addition, excellent development tools have been put into use, including CCS2(C2000),MAX+PLUSâ…¡, Prote199SE and LabWindows/CVI. Secondly, the study has accomplished the following designs: the interface adapters module, the signal generator module, the waveform testing module, the power real-time monitor module, the resolver demodulation testing module, theserial communication module and serial communication monitor module. Thirdly, the testing system simulates all functions of the servo control subassembly in the normal running state, and sets the quality requirements, then carries on the systematic adjustment and testing in the normal state, and finally logs the track record and analyses testing result and prints the testing conclusion.This system is expected to replace the manual work of the debugging and quality-testing tasks of the servo control subassembly. What's more, it is to exercise many other functions such as self-checking, self-calibration, locating malfunctions, repairing suggestions, database management, and printing the testing report, etc. Hence, it will tremendously enhance the productivity and the rate of malfunctions rehabilitation, which will ultimately help lengthen the life span of the servo control subassembly and the other related equipments attached to it and at the same time help greatly reduce the manufacturing and maintaining costs. Therefore, the application of the system is to lead up to some enormous economic benefits and have some special practical values as well.