胃肠道微诊疗装置无线电能传输的鲁棒优化研究

The micro device with multiple functions in gastrointestinal (GI) tract inspecting and therapy becomes to the development direction of noninvasive diagnosis and treatment, and the power supply is the bottleneck in this process. The research object of this project is the wireless power transmission system in the GI tract, aimed at the study of the power transmission theory and robust optimization method when the wireless power transmission system is working for the micro device with multiple working states in the GI tract environment. Specific content includes: Dynamic model is built to describe the rule of power transmission when the system was in the environment of the GI tract, of which the uncertain parameters were introduced to depict the attitude disturbance of human body in the primary coil, the change of the position and attitude of the second coils, as well as the switch of the load. The robust control approaches are study according different working states of the micro device, and so as the switching rule of various controllers. Testing the rubust stability of the proposed controllers, the rubust boundary condition is acquired. Heat dissipation model of the micro device, built based on the pennes bioheat transfer function, are used to explore the numerical relationship between the structure of the secondary coils, transmission power margin and the rise of temperature, and temperature safety boundary conditions are obtained. Colligate the constraint conditions of rubust stability, temperature rise, electro-magnetic field for human and the volume of the device inside the GI tract, an optimal model, aimed at the maximum of the power transmission efficiency, is built to optimal the electrical parameters of the system. And it established the theoretical foundation for the optimization and practical design of the wireless power transmission system in the gastrointestinal tract inspecting and therapy.

具备多种用途的胃肠道微诊疗装置是胃肠道微创、无创诊疗技术发展的方向，电能供给是其发展的瓶颈。为解决这一热点问题，本项目以胃肠道环境下的无线电能传输系统为研究对象，对其在胃肠道环境以及为多工作状态微诊疗装置供能过程中的电能传输规律和鲁棒优化方法进行研究。具体内容包括：1.建立动力学模型描述无线电能传输系统在胃肠道环境下的电能传输规律，以不确定参数刻画导致电能传输不稳定的摄动因素，如人体姿态扰动、副边线圈姿态和位置变化、负载变化等对电能传输的作用机理；2.研究不同工作状态下微诊疗装置的鲁棒控制方法、工作状态改变时控制器的切换规律，以及系统的电气参数鲁棒稳定性边界条件；3.研究胃肠道内微诊疗装置的热传导规律及其温升阈值带来的安全性边界条件；4.综合鲁棒稳定性、温升安全性、电磁生物安全性等边界条件，建立以传输效率为目标的系统电气参数优化模型，为胃肠道无线电能传输系统的控制和优化设计提供理论依据。

具备多种用途的胃肠道微诊疗装置是胃肠道微创、无创诊疗技术发展的方向，电能供给是其发展的瓶颈。为解决这一热点问题，本项目以胃肠道环境下的无线电能传输系统为研究对象，对其在胃肠道环境以及为多工作状态微诊疗装置供能过程中的电能传输规律和鲁棒优化方法进行了研究。本项目研究成果包括两个方面的内容：.（1）发射线圈与接收线圈拓扑结构分析；（2）接收线圈优化设计方法.在第一个方面，以副边线圈姿态和位置变化为主要因素，刻画发射线圈与接收线圈的不同拓扑结构对应的电能传输波动情况，获得不同给定条件下，发射线圈与接收线圈的最优拓扑结构。.在第二个方面，综合鲁棒稳定性、温升安全性、电磁生物安全性等边界条件，建立了以传输效率为目标的系统电气参数优化模型，明确了接收线圈结构与电能传输稳定性之间的对应关系，提出了接收线圈结构优化的方法，并据此设计了接收线圈的新结构。.最后，结合这两个方面的研究成果，设计用于动物实验的发射-接收线圈对，对无线电能传输系统传热特性、线圈结构与电能传输稳定性关系等方面的结论进行了实验验证。