中文摘要：

为反映航天器系统涉及的多学科交互作用下的控制特性,开发了包含机械、电气、控制、软件等的多领域统一建模与仿真平台.该平台包含姿控软件、飞轮系统（电机及其驱动器、轴承摩擦、飞轮机构等）、磁力矩器、姿态敏感器、姿态动力学、轨道动力学、环境力矩等不同领域的模块,各模块由Modelica语言实现,有机集成一体.对两种典型的姿态控制模式——姿态建立及姿态机动的仿真表明,利用该仿真平台不但可分析整个系统的闭环控制性能,还可评估各领域部件对整体性能的影响.在航天器研制的各个阶段（方案、子系统、系统等）充分使用该平台,可实现多学科设计优化的目标.

英文摘要：

In order to reflect the control characteristics of a spacecraft under the interaction between many disciplines,a multi-domain modeling and simulation platform,dealing with mechanics,electricity,control,software,et al.is developed.This platform is composed of the following modules： the attitude control software,the flywheel system（including motor and its driver,bearing friction,the mechanism of the flywheel et al.）,magnetotorquers,attitude sensors,attitude dynamic,orbital dynamic and environment torques,and so on.All the modules are realized using Modelica language,and integrated into an organic whole.The simulation of two typical attitude control modes—attitude established and attitude manoeuvre shows that,this simulation platform is not only used to analyze the control performance of the closed-loop system,but also to evaluate the effect of each domain＇s devices.Sufficient application of this platform during all the phases（project proposal,subsystem,system,et al.） can attain the purpose of Multidisciplinary Design Optimization.