Work

Test Mass Capture Control for Drag-Free Satellite Based on State-Dependent Riccati Equation Method

Year: 2024

Type: article

Abstract: The drag-free satellite plays an important role in the space-based gravitational wave observatory. The capture control of test mass after release is a crucial technology that can affect the success of the mission. The test mass must be released to the center of the electrostatic suspension cage accurately. This paper presents a nonlinear dynamic model of drag-free satellites in Lagrange formalism. A capture control scheme for test mass release phase is proposed based on the state-dependent Riccati equation (SDRE) strategy. To deal with the actuator saturation problem, a nonlinear saturation model is introduced to the dynamics of satellite, while the SDRE strategy is applied to the non-affine system. The effectiveness of the proposed methodology is verified by the numerical simulation for the drag-free satellite.

Source: Actuators

DOI: 10.3390/act13110434

Authors: Yingjie Chen, Yankai Wang, Ti Chen, Zhengtao Wei, Javad Tayebi

Institution: Nanjing University of Aeronautics and Astronautics

Language: English

Topic: Spacecraft Dynamics and Control

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,728

Funder: National Key Research and Development Program of China