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目的:采用一种新型改进的和声搜索算法,对基于空间模态识别的传感器布置的优化方法进行研究。根据对门式起重机结构动力特性研究,得到更为理想的测点布置方案和优化结果。创新点:1.研究和声搜索算法的参数合理取值范围,提高计算效率;2.利用和声搜索算法结合模态置信度准则对起重机梁的空间模态识别进行研究,提出测点布置的合理优化方案。方法:1.基于一种改进的和声搜索算法与模态置信度准则相结合的方法对最优的传感器布置方案进行研究,通过建立的评估函数对优化得到的布置方案进行评估比较,得到近似最优的测点位置和传感器数目;2.结合门式起重机结构的动力学特性研究结果,对其在二维和三维空间的振动模态分别进行研究比较,得到更为理想的优化布置方案。结论:1.和声搜索算法具有程序实现简单和搜索能力较强的优点,本研究得到了其参数的合理取值范围,提高了其优化搜索的能力;2.研究得到了较为理想的测点位置和合理的传感器数目;3.根据起重机结构的动力特性,考虑其空间模态可得到更为理想的优化方案和识别能力。
OBJECTIVE: To study the optimization method of sensor placement based on spatial modal recognition using a new improved harmony search algorithm. According to the research on the dynamic characteristics of gantry crane structure, we get a more ideal arrangement of measuring points and optimization results. Innovative points: 1. To study the reasonable range of parameter of harmonic search algorithm, to improve the computational efficiency; 2. To study the space modal identification of crane girder by using the harmony search algorithm combined with modal confidence criteria, Rationally optimize the program. Based on an improved harmony search algorithm and modal confidence criteria, the optimal sensor placement scheme was studied, and the optimal placement scheme was evaluated and compared by the established evaluation function to obtain an approximate Optimal measuring point position and the number of sensors; 2. Combined with the research results of the dynamic characteristics of gantry crane structure, their vibration modes in two-dimensional and three-dimensional space are studied and compared respectively, and a more optimal layout scheme is obtained. Conclusions: 1. The harmony search algorithm has the advantages of simple procedure and strong searching ability. The reasonable range of its parameters is obtained in this study, and its ability of optimizing search is improved.2. The ideal measuring point Location and reasonable number of sensors; 3. According to the dynamic characteristics of the crane structure, taking into account its spatial modalities can be more optimal optimization programs and recognition capabilities.