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In order to improve the dynamics behavior of roll gimbal in an aerial three-axis ISP system while minimizing the mass and external size, the modal analysis with Finite Element Method (FEM) was carried out. Based on the modal analysis results, the structure of roll gimbal was optimized. Compared to the original structure, the dynamics performance of the optimized structure is improved remarkably, whose...
The objective of the paper is to present a method for modal parameter identification of model structure in shaking table test by using the seismic response records. The method includes two key steps. Firstly, the adaptive on-line system identification method is adopted to investigate whether the time-varying response occurs during the process of vibration, and the acceleration response record is divided...
Wood is a kind of natural resource, and it has better strength and stiffness, so it is adapt to build wood structures, such as wooden bridge and building. However, wood is vulnerable to decay by all kinds of rot fungi, so it is need to find some effective methods to test the information of defect and evaluate the position and degree of defect. Finite element method (FEM) and experiment modal analysis...
Modal analysis of satellite system is the basic requirement for the satellite structural design. The theory of normal modes is analysed rounded in this paper. And the finite element model of a small satellite, of which the monolithic structure is honeycomb sandwich plate, is established by using the finite element analysis software PATRAN/NASTRAN. Furthermore, the equivalent model for honeycomb sandwich...
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