应用基于Kriging替代模型的拓优化算法在空中摄像机的镜像设计和优化中的应用
1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sensors (Basel, Switzerland)
|August 26, 2023
概括
这项研究优化了用于航空光电子设备的轻量级主镜,使用Kriging替代模型和拓优化实现了10.41nm (RMS) 的表面精度. 该设计符合严格的光学和环境要求.
科学领域:
- 光学工程是指光学工程.
- 材料科学 材料科学 材料科学
- 航空航天工程 航空航天工程
背景情况:
- 主镜表面的精度对于Cassegrain光学系统的图像质量至关重要.
- 设计具有高品质光学表面的轻型镜子对于航空光电子设备至关重要.
- 现有的方法可能无法完全整合结构优化与表面精度要求.
研究的目的:
- 为航空光电子设备中的轻量级主镜提供综合设计优化流程.
- 使用先进的建模技术,建立镜像结构和表面精度之间的关系.
- 为了实现符合光学性能和环境适用性规格的初级镜子设计.
主要方法:
- 使用Kriging代用模型与拓优化算法嵌套在一起.
- 构建了一个响应面,用于镜像根平均平方 (RMS) 值.
- 在结构优化中采用增量标准和多目标优化分析.
- 通过有限元法 (FEM) 分析验证了代用模型的精度.
- 进行了动力分析,以评估在加速度负载下的性能.
主要成果:
- 实现了10.41nm的初级镜像根平均平方 (RMS) 值,超过了1/40 λ (λ = 632.8 nm) 规格.
- 与FEM分析相比,Kriging替代模型表现出高精度,误差为0.28%.
- 优化的镜子结构在三向20g加速负载下没有表现出塑性变形或故障.
- 该设计成功满足了光学性能和环境适用性要求.
结论:
- 综合设计优化过程有效地产生了轻量级的初级镜子,具有卓越的表面精度.
- 克里金替代模型准确地预测了镜面的精度,从而实现了高效的设计优化.
- 开发的镜子设计适用于苛刻的航空环境,满足严格的光学和机械规格.
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