Multi-degree of freedom micro-vibrating environment simulating method

Abstract

The invention provides a multi-degree of freedom micro-vibrating environment simulating method. The method includes the following steps: forecasting micro-vibrating environment conditions; identifyinga multiple-input-multiple-output system transfer function matrix; and conducting multi-degree of freedom micro-vibrating signal simulation control. The method herein conducts closed-loop control on the multiple-input-multiple-output system based on a multi-degree of freedom reference signal, the transfer function of the system and a multi-degree of freedom response signal that are configured, drives a micro-vibrating excitation system to move, and simulates the multi-degree of freedom micro-vibrating environment. According to the invention, the method herein has excellent universality and high efficiency, and better addresses the technical problems of micro-vibrating tests.

Description

technical field [0001] The invention belongs to the field of spacecraft mechanics environment test, and in particular relates to a multi-degree-of-freedom micro-vibration environment simulation method. Background technique [0002] At present, the simulation of micro-vibration environment mainly adopts the method of installing disturbing source equipment, installing vibration exciter equipment and using excitation system. The method of installing the disturbing source equipment is to generate a real micro-vibration environment by making the disturbing source equipment work normally; the method of installing the vibrator is to simulate the micro-vibration environment by using the exciter to generate an excitation signal similar to the real disturbance source; In a systematic approach, a micro-vibration excitation system is used to generate a micro-vibration signal to simulate a micro-vibration environment. For example, the micro-vibration environment simulation system based ...

AI Technical Summary

Problems solved by technology

[0003] However, regardless of the method of installing the disturbance source or the installation of the exciter, a complex test system needs to be built during the test; and for different test objects, the types and models of the disturbance source and the exciter used are different

Therefore, these two methods generally have the problems of time-consuming, complex and poor versatility

However, the method of simulating the micro-vibration environment by foreign institutions through the micro-vibration excitation system is currently unheard of in China.

In addition, foreign institutions use micro-vibration excitation systems to simulate the micro-vibration environment of fast mirrors and mid-infrared cameras. The experimental objects are relatively single, and there are defects in the applicability of micro-vibration environment simulation for other payloads or key parts of spacecraft.

Images