摘要: |
本文建立了考虑不确定间隙空间可展机构动力学模型,通过对不确定间隙进行描述,结合传统接触模型提出含不确定区间间隙的接触力模型,并将其嵌入展开单元动力学模型,通过切比雪夫区间求解对含区间系统动力学模型进行求解,针对区间求解中启动阶段估计不准、区间叠加误差过大、区间整合的问题与展开单元叠加问题,提出了相适应的区间扩张、局部均值分解与瞬时叠加方法降低区间求解误差,并给出区间间隙累加下动力学响应边界。结果表明:区间间隙大小主要对系统运动精度产生较大影响,而区间间隙数量对系统运动稳定度影响较为严重。区间叠加方法相比于传统拟合方法可进一步提高空间可展机构预示精度,相较于传统拟合结果可提高7.74%。 |
(1.College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China;2.School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China;3.Tianjin Institute of Aerospace Mechanical and Electrical Equipment, Tianjin Key Laboratory of Microgravity and Hypogravity Environment Simulation Technology, Tianjin 300301, China;4.School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China)
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