Development of Linear Motor for Fuel Pump System (for Reaction Control System) in Artificial Satellite

随着人造卫星反应控制系统燃料消耗量的增加，传统的加压气体进料式燃料供应系统高压油箱的体积和重量都有所增加。在之前的工作中，我们提出了一种新型的直线电机推进燃油泵系统，该系统在直线电机两侧安装两个泵，并组织带有弹簧的谐振系统来减小额定推力。本研究的目的是开发最适合快速往复运动使用的轻量、小尺寸直线电机，并研究其最优控制策略。本工作取得的主要成果如下：1。为了研究运动控制，我们安装了一个新的实验装置，该装置由线性脉冲电机（LPM）、驱动器和位置传感器、推力传感器等测量装置组成。实验证实了LPM按指示往复运动。在为驾驶员增加再生制动功能后，我们将确定弹簧常数、额定推力、行程和弹簧-质量共振系统中共振频率的最佳组合，并对最优控制算法进行实验研究。提出了一种利用非线性规划技术对直线电机设计参数进行优化的方法，并将多目标规划技术应用到优化方案中。利用优化程序设计并生产了小型单面直线感应电动机。目前，我们一直在对逆变器系统进行改进，以研究矢量控制。研究了直线直流电动机的设计方法和分析方法。现在，我们正在做优化程序。

With increasing consumption of fuel in an artificial satellite reaction control system, the high pressure tank of conventional pressurized-gas feed type fuel supply system has increased in size and weight. In the previous work, we proposed a new type fuel pump system with linear motor propulsion, inwhich two pumps were equipped on both sides of a linear motor and resonant system with springs was organized to decrease the rated thrust. The aim of this research is to develop the light weight and small size linear motor most suitable for the quick reciprocating motion use and investigate the optimum control strategy.Principal results obtined by this work are as follows ;1. For studying the motion control, we install a new experimental apparatus consisted of a linear pulse motor (LPM), a driver and measurement devices such as position sensor and thrust sensor. It is confirmed experimentally that the LPM reciprocates as instructed. After adding the regenerative braking function to the driver, we will decide the best combinations of the spring constant, the rated thrust, the stroke and the resonance frequency in the spring-mass resonance system and investigate the optimum control algorithm experimentally.2. We develop a method of optimizing the design parameters of the linear motor using nonlinear programming technique and we, moreover, apply the multi-objective programming technique to the optimization program. We design and produce a small-sized single sided linear induction motor by use of the optimization program. Now, we have been improving the inverter system for studying the vector control.3. We research the design method and analytical method for linear direct current motors. Now, we are making the optimization program.