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| Numerical Simulation of the Multi-Input Multi-Output Random Vibration Tests Based on Pseudo Excitation Method |
| WANG Zhaoxi， ZHAI Shihui， ZHAO Fan， WANG Zhelan， XIE Xiayang |
| Shanghai Spaceflight Precision Machinery Institute， Shanghai 201600， China |
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Abstract In this paper, the numerical simulation and control effect of double-vibration test for the slender aerocraft were studied. Using the Mode-superposition method, a dynamic model of the slender aerocraft under multi-input multi-output random vibration tests was proposed in this paper. The pseudo excitation method and inverse pseudo excitation method were adopted to study the influence of the reference point number and the reference spectral density matrix. The numerical simulation of the Multi-Input Multi-Output random vibration tests of a simulator of the slender aerocraft under different reference point numbers and reference spectral density matrices was acquired. Finally, the numerical simulation results were promoted through the pseudo excitation method, and the vibration responses of the various control point combinations were different for the double-vibration system.
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Received: 14 December 2022
Published: 06 July 2023
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2023, Vol. 6 
