机载光电侦察平台复合减振设计

为减小振动对机载光电侦察平台成像质量和稳定精度的影响,对光电平台进行了复合减振设计.分析了复合减振原理,针对以往单级隔振系统存在的缺点在平台内框架和外框架之间设计了二级减振系统,更加有效地隔离了外框架传递到内框架上的振动.采用二维参数优化方法计算出了复合减振系统的最优固有频率比fopt为1.43,最优阻尼比ζopt为0...

Vibration damping design for airborne electro-optical surveillance platform

In order to reduce the influence of vibration on the image quality and precision stability of a airborne electro-optical surveillance platform,a vibration damping design was performed. Based on the detailed analysis of complex damping theory,a two-grade damping system between the inter and outer frames of the platform was designed to isolate the vibration from inter frame to outer frame effectively in view of the shortcoming of the single-stage vibration isolation system. By using the two-dimensional parameter optimization method, the optimum natural frequency ratio f_opt and the optimum damping ratio ζ_opt of the vibration damping system were calculated to be 1.43 and 0.243,respectively. Finally, the vibration damping effect was illustrated through a vibration test. Compared with the previous single-stage vibration isolation system, experimental results show that the maximum vibration transmissibility of vibration damping system is lower by 50%, the frequency range of vibration transmission rate less than 1 is wider, and the amplitude range of transmissibility on high frequency is much better than that of the single-stage vibration isolation system. It is concluded that the vibration damping design is feasible and effective for electro-optical surveillance platforms.