The Parameters Of High Dynamic Platform Testing Technology Research

It has an important significance to obtain associated dynamic parameters in the flight for analysis of a missile performance, and it can also provide important reference value for the validation and optimization of system design as well as product acceptance. In this paper, taking the testing requirements of dynamic parameters in a particular model rocket for background, a parametric test system for high dynamic platform is designed and developed, according to the testing requirements and signal characteristics.Firstly, based on the basic knowledge of geomagnetic field, it makes an analysis and comparison of principle and performance of several common magnetic sensor. Combined with the test requirements and characteristics of the systems, it respectively chooses the coil geomagnetic sensor and angular velocity sensor as the high and low range speed measurement unit, according to different test environments.Secondly, after the functions of high dynamic parametric test system is divided, the design of data acquisition system and parameter measurement system has been completed. In data acquisition system,the analog-to-digital converter is controlled by FPGA, so that three channel analog signals can be sampled and stored to the flash storage array in real time. This parameter measurement system which takes STM32for the main chip is used to measure speed, acceleration and attitude of projectilem, as well as environmental parameters.Thirdly, the software of upper computer is designed to read the measurement data. It analyzes measurement data and calculates missile attitude through establishment of the system model in Simulink,so that the virtual demonstration can be completed by virtual reality toolbox in Matlab.Finally,it completes the comprehensive test of the system, and experimental results shows that the system workes well and desired design requirements are achieved.