上海交通大学学报

上海交通大学学报

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电动飞机轻量化推进系统可靠性分配方法（网络首发）

  

  1. 上海交通大学电力传输与功率变换控制教育部重点实验室

Reliability Allocation Method for Electric Aircraft Lightweight Propulsion System

  1. （Key Laboratory of Control of Power Transmission and Conversion of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China)

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摘要： 针对电动飞机电推进系统轻量化与高可靠之间的矛盾，首次提出一种考虑轻量化约束的可靠性分配方法。构建重量与可靠性之间的解析表达，以此为约束考虑电动飞机运行工况的不确定性，提出基于典型飞行剖面的“重量-可靠性”多场景均衡优化方法，实现了可靠性约束下的重量最轻和重量约束下的可靠性最高。以“创新精神号”电动飞机为例，本文所提方法可在保证系统可靠性的同时，通过对各子系统的可靠性分配，将电动飞机推进系统总重量减轻3.5%，并通过设计不同场景验证所提出方法的有效性，为电动飞机高功重比发展提供技术支撑。

关键词: 可靠性, 轻量化, 不确定性, 电推进系统, 电动飞机

Abstract: In order to solve the contradiction between lightweight and high reliability of electric aircraft electric propulsion system, a reliability allocation method based on weight optimization is proposed. For the first time, the analytical expression of weight and reliability is introduced into the electric propulsion system design model as constraints, and a flexible "weight-reliability" optimization method is proposed, considering the uncertainty of the operating conditions of electric aircraft. design a lightweight design scheme under typical flight profile and operation scene. Taking the "Spirit of Innovation" electric aircraft as an example, the results show that under the condition of ensuring the reliability of the system, this method can reduce the total weight of the power system of the electric aircraft by 3.5%. And the applicability of the proposed method is reflected by designing different scenarios.

Key words: reliability, lightweight, uncertainty, electric propulsion system, electric aircraft

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