基于Modelica语言的反作用飞轮多领域建模与仿真

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

反作用飞轮是三轴稳定小卫星高精度姿态控制系统的首选执行机构。针对反作用飞轮多领域耦合特性及其高置信度数值仿真问题,探索了基于Modelica语言实现反作用飞轮多领域建模与仿真的可行性。在反作用飞轮控制领域、电气领域、力学领域等不同领域数学模型的基础上,采用Modelica搭建了相应的反作用飞轮多领域仿真模型,并在设定工况下对其动态特性进行了数值仿真分析,得到了飞轮系统的多领域耦合特性。该仿真模型实现了飞轮系统不同领域模型之间的无缝集成和数据交换,能够有效分析各领域间的耦合特性。

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.