| 摘要: |
| 在轨制造桁架缓解了空间大型结构体积大、结构复杂带来的对火箭运载能力的压力，摆脱火箭运载能力对桁架包络尺寸的限制，提高航天任务的灵活性，具有广阔应用前景。传统桁架结构采用桁架构型和模块先设计、后制造的工序，无法处理在轨制造中面临的桁架任务重构、桁架框架建造失败再设计等多种突发问题。为此，本文提出了一种基于内点法求解的在轨制造桁架结构变设计域优化方法，通过统一多个设计域尺寸不同的优化问题的方式综合考虑整个桁架的设计与制造过程，在已经建造的桁架结构基础上重新规划剩余的桁架单元分布，实现桁架结构的设计与制造工序同步。算例表明，变设计域优化方法可以根据当前已经建造的桁架结构和载荷分配，优化剩余未建造的桁架结构，保障整体承载设计目标下降可控，能够为大型在轨制造桁架结构提供设计理论支撑。 |
| 关键词: 在轨制造 桁架结构 变设计域 内点法 |
| 基金项目:国家重点研发计划项目（2023YF****4800）；国家自然科学基金项目（11802031；12072029；12172055）；机械系统与振动全国重点实验室开放基金项目（SV2020-KF-11）。 |
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| Research on Variable Design Domain Optimization Method for In-space Manufacturing of Truss Structures |
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Chen Yang1, Jing Shikai1, Bin Fengjiao2, Zhao Tong1, Xiao Dengbao*2, Yang Dongsheng3, Liang Chunzu3, Han Jianchao3
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1. Industrial and Intelligent Systems Engineering Research Institute, Beijing Institute of Technology, Beijing 100081;2. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081;3. Beijing Spacecraft Manufacturing Co., Ltd., Beijing 100094
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| Abstract: |
| In-space manufacturing of truss structures alleviates the pressure on rocket launch capacity caused by the large volume and complex configuration of space mega-structures, breaking through the payload envelope constraints imposed by launch vehicles and enhancing mission flexibility, demonstrating broad application prospects. Traditional truss construction follows a sequential design-then-manufacture paradigm for truss configurations and modules, which cannot address various contingencies encountered during in-space manufacturing such as mission reconfiguration requirements and structural framework reconstruction after construction failures. To overcome these limitations, this paper proposes a variable design domain optimization method for in-space manufacturing of truss structures that synergistically integrates the design and fabrication processes by unifying optimization problems with different sizes across multiple design domains, which could be solved using the interior-point algorithm. This approach enables dynamic reconfiguration of remaining truss unit distribution based on existing constructed structures, achieving concurrent optimization of truss unit design and manufacturing sequences. Case studies demonstrate that the proposed variable design domain optimization method can effectively optimize unconstructed truss sections according to current structural status and load distribution, ensuring controlled degradation of overall load-bearing objectives. This methodology provides theoretical foundations for designing large-scale in-space manufactured truss structures. |
| Key words: in-space manufacturing truss structure variable design domain interior-point algorithm |
