Multi-objective Optimization of Fixed Honeycomb Panel Space Radiator Based on NSGA-II Algorithm
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摘要: 空间辐射器是航天热控系统的重要组成部分。为满足某低轨卫星散热与减重需求,借助反设计理念提出一种固定式蜂窝板辐射器的优化策略,通过宏观与微观传热角度阐述出辐射器性能改善的根本原因。以热管-管路布局参数作为设计变量,采用Kriging构建代理模型并基于NSGA-II算法迭代优化得到方案α与方案β,仿真结果表明:优化方案在降低辐射器质量约1/4的基础上,分别提高表面温度均匀性3.09K与4.98K,提高散热能力18.7%与28.8%。对优化前后方案卫星绕轨运行温度水平进行对比分析,结果表明辐射器的优化设计使航天器热控系统具有更大的温度控制余量且具备显著的减重优势,更有助于航天器在轨任务的进行与拓展。Abstract: Space radiator is an important part of aerospace thermal control system. In order to meet the heat dissipation and weight reduction requirements of a low-orbit satellite, an optimization strategy of fixed honeycomb plate space radiator has been proposed with the help of inverse design concept, and the root cause of space radiator performance improvement has been expounded from the perspective of macro and micro heat transfer. Taking the layout parameters of heat pipes and fluid loop as the design variables, Kriging was used to construct the surrogate model, and the scheme α and β were obtained by iterative optimization based on NSGA-II algorithm. The simulation results show that the optimization schemes improve the surface temperature uniformity by 3.09K and 4.98K respectively, and improve the heat dissipation capacity by 18.7% and 28.8% on the basis of reducing the mass by about 1/4. The on-orbit temperature level of satellite were compared and analyzed. The verification results show that the optimal design of the radiator makes the spacecraft thermal control system have greater temperature control margin and significant weight reduction advantages, which is more conducive to the development and expansion of spacecraft on-orbit tasks.
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Key words:
- space radiator /
- NSGA-II algorithm /
- surrogate model /
- sensitivity analysis
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