宇航级三浮陀螺仪三质量块隔振模型

Three-mass vibration isolation model of astronautical three-floated gyro

从三浮陀螺仪的结构出发,考虑浮液和动压气体轴承的特点及隔振作用,运用振动理论和隔振技术,建立并论述了三浮陀螺仪三质量块振动模型。对该模型在受迫振动下的运动方程进行了分析,得到了运动方程的解。对该模型的参数进行了识别,对浮液阻尼特性进行了分析,用摄动法求解了阻尼系数c12;对波纹管弹性系数进行了推导计算,得到了弹性系数k12的表达式;对气体轴承的动态阻尼和刚度进行了分析说明,得到了阻尼系数c23和弹性系数k23的表达式。基于此模型,给出了力传递系数的求解方法以及表达式。对三浮陀螺仪振动传递研究有一定指导作用。

According to the physical structure of the floated gyro and considering the vibration-isolation effect of the viscous liquid and aerodynamic bearings, a three-mass model of three-floated gyro is established and discussed based on the vibration theory vibration-isolation technique. The motion equations under forced vibration are analyzed and solved. The parameters of the model are identified, the damp c12 is got in the method of perturbation, and the damp c23, stiffness k12 and k23 are given. Based on the proposed model, the solution to the modulus of force transmission is obtained. These analyses could provide reference for the research of three-floated gyro's vibration transmission. ©, 2014, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.