惯性动量轮滑模变结构控制  

Sliding Mode Variable-structure Control of Inertia Momentum Wheels

作　　者：张聪[1] 刘刚[1] 李光军[1] 

机构地区：[1]北京航空航天大学惯性技术国家重点实验室,北京市海淀区100191

出　　处：《中国电机工程学报》2012年第21期131-136,共6页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2009CB72400103)~~

摘　　要：为了改善惯性动量轮的动静态性能,提高其转速跟踪精度和输出力矩精度,提出一种滑模变结构控制算法。通过建立包括永磁无刷直流电机和功率变换器在内的惯性动量轮状态空间平均模型,基于李导数形式表述的到达条件,设计并推导出滑模变结构控制律。为验证该控制律的有效性,在惯性动量轮上进行实验分析,实验结果表明:相比传统的PID控制算法,所采用的滑模变结构控制算法响应时间和超调量较小,绕组电流更加平滑,具有更好的动静态性能,转速跟踪精度从2.51 rad/s提高到0.21 rad/s,输出力矩精度从0.01 N m提高到0.001 N m。To improve dynamic and static performance of inertia momentum wheels, its rotational speed tracking and output torque precision, a novel sliding mode variable-structure Control algorithm was presented. The state-space average model for inertia momentum wheels was established, that consisted of permanent magnet brushless DC motor and power convertor. Based the reach qualification expressed by Lee differential coefficient, the sliding mode variable-structure control law was designed and deduced. The experimentations were performed on inertia momentum wheels to validate the effectiveness of the proposed control law. Experimental results demonstrated that the proposed algorithm made the winding current smooth, improved the rotational speed tracking precision from 2.51 rad/s to 0.21 rad/s and output torque precision from 0.01 N.m to 0.001 N.m, and possessed faster response, smaller over-shoot, better dynamic and static performance.

关 键 词：惯性动量轮 滑模变结构 状态空间平均模型 到达条件 

分 类 号：V448[航空宇航科学与技术—飞行器设计]