驱动控制对太阳帆板驱动系统动力学特性的影响

准确预示太阳帆板驱动系统动力学特性是开展扰振机理和振动控制研究的基础。本文推导了考虑驱动控制因素的太阳帆板驱动装置等效力学特性参数表达式,构建了太阳帆板驱动系统动力学特性等效分析模型,并在仿真和试验验证基础上,讨论了驱动速度和控制增益对驱动装置力学特性参数和驱动系统动力学特性的影响规律。结果表明:所构建的等效分析模型能够在不同驱动速度和控制增益情况下准确预示驱动系统动力学特性,分析结果与试验误差小于10%；驱动装置等效阻尼与驱动速度和控制增益无关,但等效刚度随控制增益减小和驱动速度增大而减弱。随着驱动速度提高,驱动控制逐渐成为影响驱动系统动力学特性的重要因素。

Influence of drive control on dynamic characteristics of solar array drive system

Accurate prediction of dynamic characteristics is an indispensable research foundation for the disturbance mechanism and vibration control of SADS(solar array drive system). The equivalent mechanical parameters of the drive mechanism were deduced with the consideration of drive control, the equivalent dynamics-characteristics analysis model of SADS was built and verified via simulation and experiment, the influence of the drive speed and control gains on the equivalent mechanical parameters of drive mechanism and dynamic characteristics of SADS was discussed. The results show that the equivalent analysis model can accurately predict the dynamic characteristics of SADS with different drive speeds and control gains, and the error between the analysis results and the test data is less than 10%. The equivalent damping of the drive mechanism cannot be affected by the drive speed and control gain, but the equivalent stiffness decreases with the decrease of the control gain and the increase of the drive speed. The drive control gradually becomes an important factor affecting the dynamic characteristics of SADS with the increase of the drive speed.