基于多模型的捷联红外导引头隔离度在线补偿方法
发布时间：2018-12-21 14:59
【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。
[Abstract]:Based on the engineering application of strapdown infrared seeker, an online isolation compensation method based on multiple models (multiple model,MM) is proposed to solve the isolation problem caused by scale error. The isolation degree model of strapdown infrared seeker is established, and the influence of isolation degree on the stability and guidance accuracy of missile guidance system is analyzed. The discrete modeling of scale error is carried out, and the conditional probability of matching each model with real value is updated in real time by using filter algorithm based on MM, and the estimated value of scale error is obtained. Finally, the error estimation of the scale at the current time is substituted into the guidance loop for online compensation. The results show that the existence of isolation degree of strapdown seeker will weaken the stability of guidance system and reduce the guidance accuracy, especially when the parasitic loop is positive feedback. The proposed online compensation method of isolation degree based on MM can estimate the scale error of the system in real time, and it can effectively suppress the isolation degree caused by the scale error. It has good robustness and adaptability. The aim of improving guidance performance and guidance precision is achieved.
【作者单位】： 北京理工大学宇航学院;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;贵州大学电气工程学院;北京航天新风机械设备有限责任公司;
【基金】：国家自然科学基金(61172182)资助课题
【分类号】：TJ765.333
[Abstract]:Based on the engineering application of strapdown infrared seeker, an online isolation compensation method based on multiple models (multiple model,MM) is proposed to solve the isolation problem caused by scale error. The isolation degree model of strapdown infrared seeker is established, and the influence of isolation degree on the stability and guidance accuracy of missile guidance system is analyzed. The discrete modeling of scale error is carried out, and the conditional probability of matching each model with real value is updated in real time by using filter algorithm based on MM, and the estimated value of scale error is obtained. Finally, the error estimation of the scale at the current time is substituted into the guidance loop for online compensation. The results show that the existence of isolation degree of strapdown seeker will weaken the stability of guidance system and reduce the guidance accuracy, especially when the parasitic loop is positive feedback. The proposed online compensation method of isolation degree based on MM can estimate the scale error of the system in real time, and it can effectively suppress the isolation degree caused by the scale error. It has good robustness and adaptability. The aim of improving guidance performance and guidance precision is achieved.
【作者单位】： 北京理工大学宇航学院;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;贵州大学电气工程学院;北京航天新风机械设备有限责任公司;
【基金】：国家自然科学基金(61172182)资助课题
【分类号】：TJ765.333
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