整星非线性行程放大能量采集与减振系统的建模、实验与分析

The nonlinear itinerary enlarged energy harvesting and vibration reduction system of whole-spacecraft can solve the problem of the whole-spacecraft the external energy limitation and vibration control. This project forces on the modeling, experiment and analysis of the itinerary enlarged energy harvesting and vibration absorber system for the whole-spacecraft. The nonlinear dynamic model under machine-electro-magnetic multi-field coupling is obtained by considering of the geometric nonlinearity of the lever-type nonlinear energy sink, enlarged itinerary effect of lever, the material nonlinearity and electromagnetic effect of the giant magnetostrictive vibration energy harvester and giant magnetostrictive piezomagnetic-piezoelectric composite energy harvester. The efficiency of the energy harvesting is improved while the reducing the mass and strengthening the vibration control of the whole-spacecraft by using the mechanism of the itinerary enlarged of the lever. A semi-analytical method for solving strong nonlinear multi-degree-of-freedom and multi-field coupled systems will be developed. The influence of energy harvesting and vibration reduction integrated parameters on the vibration control effect and output electric power of the whole star system is clarified. An embedded experimental program for the nonlinear itinerary enlarged energy harvesting and vibration reduction system of the whole-spacecraft is developed. The results of theoretical modeling and analytical analysis can be verified through the experiment. The development of this project will enrich the theory of strongly nonlinear multi-field coupled dynamics, expand the application of nonlinear vibration theory and lay a theoretical foundation for the design and optimization of integrated energy harvesting and vibration control. This project has important scientific and engineering significance.

整星非线性行程放大能量采集与减振系统能够解决整星系统的外界能源限制与振动控制问题。本项目着重于整星非线性行程放大能量采集与减振系统的理论建模、分析与实验研究。考虑杠杆型非线性能量汇的几何非线性、杠杆的行程放大效应以及超磁致伸缩能量采集、超磁致伸缩压磁压电复合式能量采集的材料非线性和电磁效应，建立机电磁多场耦合下的非线性动力学模型。利用杠杆行程放大机制，在减少结构负载质量并强化整星振动控制的同时，提高振动能量采集效率。发展一类解决强非线性多自由度多场耦合系统的半解析方法，明确能量采集与减振集成化参数对整星系统振动控制效果及输出电功率的影响。研发适用于整星非线性行程放大能量采集与减振系统的嵌入式实验方案，验证理论建模与解析分析结果。本项目的开展将丰富强非线性多场耦合动力学理论，拓展非线性振动理论应用，为设计和优化整星能量采集与振动控制集成化奠定理论基础，具有重要的科学和工程意义。

本项目首先提出了超磁致伸缩式振动能量采集与杠杆型非线性能量汇减振集成化整星系统设计方案以及超磁致伸缩压磁压电复合式振动能量采集与杠杆型非线性能量汇减振集成化整星系统设计方案；其次，分别通过理论分析、数值仿真研究了杠杆型行程放大式振动能量采集减振结构的振动控制效果以及输出电压、电功率；最后，研发了适用于整星系统的最优非线性行程放大能量采集与减振系统集成化嵌入式方案，实验结果验证了理论分析与数值结果。结果表明，整星非线性行程放大能量采集与减振一体化实验装置能够有效的降低整星结构各阶共振频率处的峰值，并且有着良好的能量采集效果。本项目的研究成果丰富了强非线性多场耦合动力学理论，拓展了非线性振动理论应用，为设计和优化整星能量采集与振动控制集成化奠定了一定的理论基础与技术储备。