在轨纳卫星的主动热控建模及控制策略研究

Modeling and Control Strategy of Active Thermal System for On-orbit Nano-satellite

采用基于微机电(MEMS)的高效冷却技术,利用专家智能整定PID控制策略对纳卫星主动热控系统在轨时受到的轨道热环境及内部热源干扰进行控制。通过合理的分析与简化,建立了纳卫星MEMS主动热控系统的在轨动态数学模型,并利用人工智能领域专家的知识和经验结合经典PID控制给出了相应的控制策略。仿真结果验证了所提出的控制策略和方法是有效可行的.对工程应用有着指导意义。

MEMS （Micro Electro Mechanical Systems）-based efficient cooling system was introduced and the expert intelligent tuning PID control strategy was adopted for the On-orbit nano-satellite active thermal control system under the disturbances of the orbital thermal environment and the intemal heat payload. A dynamic model for the On-orbit nano-satellite MEMS-based active thermal control system was established by means of lumped parameter method with physical and logical simplification, and then the control strategy of combination of the artificial intelligent of expert system and classical PID control law was done as well. Simulation results validate that the control strategies and the methods proposed are feasible; moreover, it has an instructional significance for the engineering applications.