基于多模型的捷联红外导引头隔离度在线补偿方法  

Multiple model based on-line compensation for disturbance rejection rate of strapdown infrared seeker

作　　者：宗睿[1,2] 林德福[1] 王伟[1] 盛晓彦 兰玲 

机构地区：[1]北京理工大学宇航学院,北京100081 [2]北京电子工程总体研究所复杂产品智能制造系统技术国家重点实验室,北京100854 [3]贵州大学电气工程学院,贵州贵阳550025 [4]北京航天新风机械设备有限责任公司,北京100854

出　　处：《系统工程与电子技术》2017年第1期147-155,共9页Systems Engineering and Electronics

基　　金：国家自然科学基金(61172182)资助课题

摘　　要：以捷联红外导引头的工程应用为研究背景,针对刻度尺误差带来的隔离度问题,提出一种基于多模型(multiple model,MM)的隔离度在线补偿方法。建立了捷联红外导引头隔离度模型,分析了隔离度对导弹制导系统稳定性和制导精度的影响;对刻度尺误差进行离散建模,采用基于MM的滤波算法,实时更新每个模型与真实值匹配的条件概率,得到刻度尺误差的估计值,最后将当前时刻的刻度尺误差估计值代入到制导回路进行在线补偿。研究结果表明,捷联导引头隔离度的存在会削弱制导系统稳定性、降低制导精度,特别在寄生回路正反馈时影响更为严重;所提出的基于MM的隔离度在线补偿方法可较好地实时估计出作用于系统的刻度尺误差,并有效实现了对刻度尺误差引起的隔离度的在线抑制,具有较好的鲁棒性和自适应性,达到了改善制导性能,提高制导精度的目的。On the background of engineering application in strapdown infrared seeker, an on-line compensa- tion method based on multiple model（MM）is proposed aiming at inhibiting the disturbance rejection rate due to scale error. The disturbance rejection rate model of strapdown infrared seeker is established. The effects on missile guidance system stability and guidance precision due to disturbance rejection rate are analyzed. The MM based algorithm is adopted to update the model probabilities based on a series of possible scale error models, and the real time estimated results of scale error are introduced into the guidance loop to get disturbance rejection rate compensated on-line. The research results indicate that the guidance system stability and guidance precision will be weakened by disturbance rejection rate of strapdown seeker, and the positive feedback of the parasitic loop is most serious. The proposed on-line compensation method can estimate the scale error in real time, the disturbance rejection rate due to scale error is inhibited on-line effectively with good robustness and adaptivity, and the performance and precision of the guidance system are improved after the compensation.

关 键 词：捷联红外导引头 刻度尺误差 隔离度 多模型 在线补偿 

分 类 号：TJ765.4[兵器科学与技术—武器系统与运用工程]