低成本航空发动机控制器的低温加热设计及优化

Low temperature heating design and its optimization oflow-cost aeroengine controller

为保证低成本航空发动机控制器在低温环境中稳定工作,设计了一种基于聚酰亚胺(polyimide, PI)加热膜的加热方案。对该加热方案在恒温阶段和升温阶段的加热效果进行了数值仿真分析以及实验验证,仿真与实验结果表明:该方案可以满足控制器的保温需求以及快速升温需求。针对主板元件在升温过程中温度均匀性较差的问题,提出了一种基于遗传算法的加热膜几何形状优化方法,对遗传算法的交叉操作流程和变异操作流程进行了改进,以满足加热膜在实际应用时受到的限制:加热膜布置区域必须为连通域、加热膜覆盖面积保持不变。使用该方法对主板加热膜的几何形状进行了优化,并对优化后的加热效果进行了仿真分析,仿真结果验证了该优化方法的有效性。

To make sure that the low-cost aeroengine controller works stably in low temperature environment,a heating scheme using polyimide heating film was designed.The heating scheme’s performance during thermostatic stage and heat-up stage was numerically analyzed and experimentally verified.Simulation results and experiment results show that the heating scheme meets the controller’s requirements in temperature preservation and rapid heat-up.In order to improve the temperature uniformity of the components on the main board during heat-up process,an optimization method for heating film’s geometry based on genetic algorithm was put forward.Crossover operator and mutation operator was modified according to the restrictions imposed by heating film during practical application:the heating film’s layout area should be a connected domain,and the heating film’s coverage area should remain constant.The optimization method was applied to the main board’s heating film,and numerical analysis was carried out after optimization.Simulation results confirm the effectiveness of the optimization method.