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Research on Locking Position Determination of Space-arm Based on Modal Analysis

机译：基于模态分析的空间臂锁定位置确定研究

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To ensure the safe and reliable operation of the space-arm when it working in the space, the space-arm should be locked reliably during launching. The optimal number and position of the locking spots should be determined when consider locking plan. The finite element analysis method was employed to accomplish modal analysis of space-arm under different constraints state. Modal analysis was employed in simplified model of the space-arm. The relative larger displacement of the part can be identified form mode shapes which can help to determine the key locking spots. Moreover, the auxiliary locking points will be selected according to the characteristics of the arm. Thus, all the locking spots of space-arm with a series of multi-joints were selected primary. Under such locking condition, the dynamic characteristics of the space-arm will be improved increasingly. Depending on the mass characteristics of the support mechanism, its model is simplified into springs and reasonable constraint equations were established to simulate their properties. This study provides an effective theoretical basis for dynamic design and optimization design of the space-arm and the lock-unlock mechanism.
机译：为确保空间臂在太空中工作时安全可靠地操作，在发射期间应可靠地锁定空间臂。考虑锁定计划时，应确定锁定点的最佳数量和位置。采用有限元分析方法对不同约束状态下的空间臂进行模态分析。在空间臂的简化模型中采用了模态分析。可以从模式形状中识别出零件的相对较大的位移，这可以帮助确定钥匙锁定点。此外，将根据臂的特性选择辅助锁定点。因此，首先选择了具有一系列多关节的空间臂的所有锁定点。在这种锁定条件下，空间臂的动态特性将得到不断改善。根据支撑机构的质量特性，将其模型简化为弹簧，并建立合理的约束方程来模拟其性能。该研究为空间臂和锁-开锁机构的动态设计和优化设计提供了有效的理论依据。

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