直接侧向力/气动力复合控制系统的特征参数  

Characteristic Parameters of Dual Control System with Lateral Thrust and Aerodynamic Lift

作　　者：周荻[1] 李权[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《宇航学报》2011年第8期1676-1682,共7页Journal of Astronautics

基　　金：教育部新世纪优秀人才支持计划(NCET-08-0153);国家自然科学基金(60674102)

摘　　要：为考察在大气层内拦截弹上应用直接侧向力与气动力复合控制同应用纯气动力控制的本质区别,依据连续系统跟踪性能极限的研究成果,提出以复合控制对象的非最小相位零点作为描述复合控制系统性能的特征参数。气动力回路控制对象含有一个离虚轴较近的非最小相位零点;而通过合理设计气动力控制器,直接侧向力控制对象只包含一个离虚轴较远的非最小相位零点,复合控制系统的跟踪性能可望比纯气动力的更好。设计实例对此进行了分析,揭示了非最小相位零点在控制器设计中的重要作用。In order to investigate the fundamental difference between pure aerodynamic lift control and dual control i.e.lateral thrust and aerodynamic lift control,for endoatmospheric interceptors,according to theoretical analysis of tracking performance limitations in continuous systems,nonminimum phase zeros of the dual control plant are considered as characteristic parameters to describe the performance of the dual control system.By means of a suitable design of aerodynamic lift control law,there exists only one nonminimum phase zero far away from the imaginary axis in the plant for the design of lateral thrust control law.Therefore,the tracking performance of the dual control system would surpass that of a pure aerodynamic lift control system in which there exists a nonminimum phase zero near the imaginary axis.Numerical simulations show the importance of nonminimum phase zeros in the design process.

关 键 词：复合控制 特征参数 性能极限 非最小相位零点 

分 类 号：TJ765.2[兵器科学与技术—武器系统与运用工程]