| Citation: | CAI Zhi-ming, YANG Zhong-guang, ZHENG Duo-jin, HAN Rui-long, FENG Jian-chao, TANG Ning-biao, LIU Ye, FAN Yi-di, WANG Peng-cheng, SHI Xing-jian, CHEN Kun. Design and implementation of a full-chain dynamic simulation system for space-based gravitational wave detection[J]. Chinese Optics. doi: 10.37188/CO.2026-0084 |
To address the issue that traditional static noise superposition methods in space-based gravitational wave detection neglect the dynamic coupling between multi-physics fields and the control system, making it difficult to meet the requirements of high-fidelity mission simulations, it is proposed and designed that a full-chain dynamic simulation system for space-based gravitational wave detection, establishing closed-loop feedback capability between the multi-physics fields and the control system. The system adopts a dynamic closed-loop architecture, comprising a spacecraft multi-physics field simulation module, a full-chain noise simulation module, a drag-free control simulation module, and a data processing and analysis module. In this architecture, the physical field states are computed based on the spacecraft states after control, and noises are generated through full-chain noise models mapped from the physical field states. The system achieves physical source tracing and dynamic simulation of full-chain noises. Simulation experiments reveal that self-gravity acceleration disturbances induced by the motion of the Movable Optical Sub-Assembly (MOSA) and fuel consumption can reach 10−13 m·s−2· Hz−1/2 level in the observation frequency band(0.1 mHz-1 Hz), necessitating compensation or subtraction through high-precision in-orbit measurement and calibration methods. The constructed system is capable of capturing dynamic coupling effects neglected by static models, thereby providing a high-fidelity simulation platform for mission design, noise source tracing and sensitivity evaluation in space-based gravitational wave detection.
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