Design and implementation of a micro-vibration testing platform for spaceborne high-resolution camera stabilization
Mangmang Wang, Sihui Li, Xuan Chen, Xiaohua Zhou, Yong Liu · 2025
The impact of micro-vibrations on high-resolution cameras is often overlooked in terms of the coupling effects between optical elements and disturbance sources, as well as the differences between ground and in-orbit microgravity environments, leading to significant errors in image shift assessment. This paper presents a dual-axis composite image stabilization design scheme based on damping vibration isolation and fast steering mirrors, along with a ground-based testing and evaluation method. A ground test platform simulating the microgravity environment in orbit was built using a spring suspension system, and a vibration measurement scheme for the rigid body attitude of optical elements based on accelerometers was designed and its accuracy was validated. In conjunction with ZEMAX software, a semi-hardware-in-the-loop simulation test platform was established to calculate and evaluate micro-vibration impact on image quality in an orbital environment. Analysis and verification were performed in both time and frequency domains by comparing the test data results with the image stabilization system on and off. The results show that the image stabilization system can reduce the image motion from 1.35 pixels (with a pixel size of 7 μm) to 0.3 pixels, meeting high-resolution cameras' dynamic imaging quality requirements and demonstrating significant engineering application value.