Zhou Chengbo, Xu Zhenbang, Xia Mingyi
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
Sensors (Basel). 2024 Feb 17;24(4):1284. doi: 10.3390/s24041284.
To guarantee the accuracy of sophisticated equipment in spacecraft, it is essential to evaluate the dynamic forces of vibration sources. In contrast to conventional rigid-based measuring approaches, a method for predicting the interference of dynamic forces from large sources on spacecraft considering vibration coupling is proposed. In addition, a flexible-based dynamic force measuring platform capable of withstanding large masses and mounting large-volume vibration sources is designed. After that, the experiments for calibrating the platform and acquiring unknown terms in the derived theoretical models are detailed. The principle prototype is then manufactured for feasibility verification. It is demonstrated that despite the low fundamental frequency of the measuring platform of 242.8 Hz, the measurement error of the flexible measuring platform is less than 8% when the coupling is taken into account, which is 29% lower than that without coupling. Additionally, the prediction error of disturbance forces is within 17%. As a result, the accuracy of the proposed dynamic force measurement and prediction of large vibration sources considering coupling is substantially improved, providing a good reference for aerospace applications.
为确保航天器中精密设备的准确性，评估振动源的动态力至关重要。与传统的基于刚性的测量方法不同，提出了一种考虑振动耦合来预测大型源对航天器动态力干扰的方法。此外，还设计了一种基于柔性的动态力测量平台，该平台能够承受大质量并安装大体积振动源。之后，详细介绍了校准平台和获取推导理论模型中未知项的实验。然后制造原理样机进行可行性验证。结果表明，尽管测量平台的基频低至242.8 Hz，但考虑耦合时柔性测量平台的测量误差小于8%，比不考虑耦合时低29%。此外，干扰力的预测误差在17%以内。因此，所提出的考虑耦合的大型振动源动态力测量和预测的准确性得到了显著提高，为航空航天应用提供了良好的参考。
