基于能量平衡的平流层飞艇推进系统建模与优化设计

为了在平流层飞艇推进系统高效率和轻质量需求的矛盾之中取得平衡,提出基于能量平衡的平流层飞艇推进系统建模与优化设计方法。利用试验设计和代理模型技术分别建立了高空电动机、螺旋桨的主要设计参数与其效率和质量的代理模型。建立了包含太阳能电池和储能电池的飞艇能源系统质量计算模型。以整系统能量平衡和推阻平衡为约束,以推进与能源系统总质量最小为目标,借助多岛遗传算法构建了飞艇推进系统优化设计数学模型。对某型平流层飞艇推进系统进行了优化设计,结果表明:优化后的推进系统效率提升了23%,推进与能源系统总质量降低了340 kg,验证了该平流层飞艇推进系统建模与优化设计方法的可行性和应用价值。

Modeling and optimal design of stratospheric airship propulsion system based on energy balance

An modeling and optimal design method of stratospheric airship propulsion system based on energy balance was proposed to achieve both high efficiency and light weight goals.Efficiency and weight surrogate models of motor and propeller were individually established using design of experiments method and surrogate model technology. A weight calculation model for airship energy system containing solar cells and energy storage batteries was also built. Based on the multi-island genetic algorithm, the optimal design model of airship propulsion system was established with the energy and thrust balance as the constraints,and the minimum total weight of the propulsion and energy system as the goal. Optimization design of an example was carried out. The results show that the efficiency of the optimized propulsion system is increased by 23%,and the total weight of the propulsion and energy system is reduced by 340 kg,verifying the feasibility and application value of the modeling and optimal design method of stratospheric airship propulsion system.