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为分析隔振平台对星上飞轮扰动的衰减效果,研究了飞轮隔振平台组合系统的动力学建模问题.首先推导出含有静动不平衡量的飞轮加隔振平台组合系统的动力学模型.从模型中得出,飞轮和平台之间存在耦合;转子的静动不平衡会体现为飞轮的多项扰动力和扰动力矩.其次,对这些扰动项进行量级分析,并据此简化系统方程.最后利用数值仿真将简化模型与之前的完整模型作对比,验证了此简化模型的合理性;并通过初步的整星系统仿真,说明了隔振系统对航天器姿态稳定度的改善效果.
In order to analyze the damping effect of the vibration isolation platform on the flywheel disturbance, the dynamic modeling of the flywheel vibration isolation platform combination system is studied.First, the dynamic model of the flywheel and vibration isolation platform combination system with the static and dynamic unbalance is deduced. From the model, there is a coupling between the flywheel and the platform, and the static and dynamic imbalance of the rotor will be reflected as a number of perturbations and disturbances of the flywheel.Secondly, the perturbation terms are orderly analyzed and the system equations Finally, numerical simulation is used to compare the simplified model with the previous complete model, which verifies the rationality of the simplified model. Finally, the effect of the vibration isolation system on the attitude stability of the spacecraft is illustrated through the preliminary simulation of the whole satellite system.