Multi-domain Modeling and Simulation of Reaction Wheel Based on Modelica

Reaction wheel has become preferred actuator for precision attitude control in three-axis stabilized micro-satellites.In view of its inter-disciplinary coupling characteristics and high-confidence numerical simulation problem,a feasible scheme to implement multi-domain modeling and simulation of reaction wheels using Modelica was explored.A multi-domain simulation model of reaction wheel was established with Modelica on the basis of mathematical models of its control system,electric system and mechanical system.The inter-disciplinary coupling as well as dynamic characteristics of the reaction wheel was analyzed through a numerical simulation under given condition.The Modelica based simulation model achieves seamless integration and data exchange among models in different domains,and can make effective analyses of inter-disciplinary coupling.