Lightweight design and analysis of optical cover plate for exoplanet imaging coronagraph

TL;DR

This paper presents a lightweight carbon fiber optical cover plate for exoplanet imaging coronagraphs, optimizing its design through finite element analysis to ensure stiffness and dynamic performance.

Contribution

It introduces a novel lightweight carbon fiber design for optical cover plates, replacing traditional aluminum alloy, with optimized layup configuration verified by simulation.

Findings

Carbon fiber cover plate reduces weight compared to aluminum.

Layup configuration [15/-75/-15/75]s achieves desired stiffness.

Dynamic response meets system requirements.

Abstract

In order to reduce the load mass and solve the problem that the aluminum alloy optical cover plate of exoplanet imaging coronagraph was easy to deform, based on the equal generation design method, this paper designed and determined the configuration of the carbon fiber optical cover plate. Through the simulation of layup by finite element analysis, this paper researched the influence of different layering angles and sequences on the stiffness of optical cover plate. Finally, the carbon fiber layup method was determined as [15/-75/-15/75]s. The dynamic response analysis show that all the indexes satisfy the system requirements, and verify the feasibility of carbon fiber optical cover plate.