The excessive vibration of hydraulic pipelines causes safety concern in aircraft and requires immediate response. The active vibration elimination is a complicated method and difficult to implement in aircraft hydraulic system. In this work, a new method of passive vibration elimination which optimized the clamps layout based on system characteristic impedance was presented. Firstly, the models of pipes and components were established, and based on Transfer Matrix Method (TMM), the law of characteristic impedance in frequency domain was obtained. The weighted sum of characteristic impedance in natural frequencies of vibration source was set as objective function. The locations of clamps were optimized by Particle Swarm Optimization (PSO) algorithm to make objective function take minimum value. Through the optimization of clamps layout, the characteristic impedance of the whole system was reduced by 28.13%. Finally simulation results showed that the proposed optimization method was effective and thus this work provided some theoretical basis for the optimization of the hydraulic pipe system.
Li Xin Wang Shaoping.
Analysis of vibration control on hydraulic pipelines in aircraft based on optimized clamps layout[J]. Journal of Vibration and Shock, 2013, 32(1): 14-20
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