Virtual sinusoidal vibration testing method for spacecrafts

Abstract

The invention discloses a virtual sinusoidal vibration testing method for spacecrafts, which comprises a simulation model building step, a parameter setting step for virtual sinusoidal vibration testing, a transfer function computing step, a testing driving signal generating step and a virtual sinusoidal vibration testing step. By the virtual sinusoidal vibration testing method, all key links of real vibration testing of the spacecrafts are taken into consideration sufficiently, transfer functions of a vibration platform testing control system and a plurality of forming systems are integrated, and reality and accuracy of the conventional open-loop numerical method are evidently improved by the closed-loop computing method.

Description

technical field [0001] The invention relates to a test method for virtual sinusoidal vibration of a spacecraft, which can be directly applied to the technical field of vibration tests of spacecraft. Background technique [0002] Spacecraft such as satellites have to experience severe vibration environmental loads during the launch process. In order to ensure that the spacecraft will not be damaged by vibration loads during the launch process, vibration environment tests must be carried out on the ground during the development process to assess the structural strength of the product. Vibration table simulation vibration environment is a commonly used method at present. In the product design stage, the simulation analysis of the vibration environment test is carried out by numerical calculation methods, especially the large mass method or the forced motion excitation method, but the analysis results of these open-loop simulation methods often have a large gap with the vibratio...

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Problems solved by technology

Analyzing the reasons, in addition to the difference between the established analysis model and the actual product, the simulation analysis method is also different from the vibration test method, mainly reflected in the fact that the current analysis method basically does not consider the coupling effect of the shaking table system on the product vibration test , does not consider the impact of the closed-loop control of the vibration control system, so the gap between the two is relatively large

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