航空遥感用三轴惯性稳定平台不平衡力矩前馈补偿方法  

Feedforward compensation method for three axes inertially stabilized platform imbalance torque

作　　者：房建成[1] 戚自辉[1] 钟麦英[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191

出　　处：《中国惯性技术学报》2010年第1期38-43,共6页Journal of Chinese Inertial Technology

基　　金：国家863计划(2008AA121302);国家973课题(2009CB72400201)

摘　　要：航空遥感用三轴惯性稳定平台用于稳定成像载荷,获取高分辨的遥感数据。但是由于稳定平台承载大且存在质量偏心,在载机加速度的作用下平台产生幅值较大的不平衡力矩,导致平台的稳定精度下降和相机成像质量退化。为了有效抑制不平衡力矩产生的影响,提高平台的稳定精度,提出了一种基于不平衡力矩观测器的惯性稳定平台不平衡力矩前馈补偿方法。首先设计一种不平衡力矩观测器,实时估计出平台的不平衡力矩;然后通过前馈补偿的方法抑制不平衡力矩的作用,从而达到提高平台的稳定精度的目的。仿真结果显示,平台的稳定精度得到大幅度提高,基于不平衡力矩观测器的惯性稳定平台不平衡力矩前馈补偿方法有显著补偿效果。Three axes inertially stabilized platform is used to stabilize the imaging sensor in airborne high-resolution remote sensing system. But due to the existence of mass imbalance in three axes inertially stabilized platform, the imbalance torque is inevitable under the effect of acceleration, which could lead to the decline of platform accuracy and the degeneration of image quality. In order to attenuate the influence of the imbalance torque, an observer-based imbalance torque feed-forward compensation method is proposed. Firstly, an imbalance torque observer is designed to estimate the real-time imbalance torque. Then, through feed-forward compensation, the influence of imbalance torque is restrained. The simulation results show that the platform stable accuracy is dramatically improved, and the effectiveness of the observer-based imbalance torque feed-forward compensation method is obvious.

关 键 词：航空遥感 三轴惯性稳定平台 质量不平衡 前馈补偿 观测器 

分 类 号：U666.1[交通运输工程—船舶及航道工程]