摘要
研究采用变速控制力矩陀螺群(VSCMGs)作为姿态控制执行机构的高姿态稳定度敏捷卫星的操纵律设计问题。将VSCMG分为控制力矩陀螺(CMG)和动量轮(MW)两种工作模式,针对每种工作模式进行奇异性分析,并给出逃避奇异的方法。为了获得较好的控制效果,还研究了VSCMGs转子转速向标称转速平衡的方法以及通过调整转子轴构型使转子转速快速返回到标称值的方法。最后通过对算例进行仿真,验证了所设计的操纵律的有效性。
The fast-maneuver and high-attitude-stability control problem of agile satellites is addressed by employing the variable speed control moment gyros （VSCMGs） as the actuator. A steering law is proposed by using the Lyapunov approach. The VSCMG can work in two modes, control moment gyro （CMG） mode or moment wheel（MW） mode. The singularity problem of each working mode is analyzed. An approach is proposed to avoid the singularity. To improve the control performanc% the problem of matching the VSCMGs wheel＇ s speed with its nominal value is also studied. A method for rapid dumping of wheel＇ s speed is presented by adjusting the formation of wheels. Numerical simulations illustrate the feasibility and performance of the proposed steering law.
出处
《空间控制技术与应用》
2008年第6期24-28,共5页
Aerospace Control and Application
关键词
变速控制力矩陀螺
奇异
操纵律
variable speed control moment gyro
singularity
steering law
