新型动态控制力矩陀螺操纵律设计

Novel dynamic CMG steering law based on differential approximation

首先提出一类新型控制力矩陀螺(CMG)操纵律,改变使用静态数据求逆构造力矩分配矩阵的设计思路,利用近似的动态微分特性构造力矩分配矩阵,进而对新型操纵律奇异性进行分析.基于奇异分析结果,设计一种切换型CMG奇异回避策略,使CMG能在首选力矩分配矩阵接近奇异时,使用非奇异的备选分配矩阵将之替换.仿真结果表明,所设计的CMG操纵律具有较高的计算精度,同时具有一定的奇异适应性.

To address the control momentum gyros（CMG） control issue, a novel steering law is proposed, characterized by the approximate differential dynamics used in the control allocation to replace the statically calculated pseudo-inverse methods. The analysis is proceeded to figure out the singularity robustness. As a result, a switching strategy is proposed to handle the singularity by replacing the allocation matrix with a nonsingular one. Numerical simulations are applied to verify the performance of the algorithm which provides better accuracy and certain singularity robustness.