论文:2013,Vol:31,Issue(2):244-249
引用本文:
崇阳, 张科, 吕梅柏, 仝希. 离散自抗扰变结构末制导律设计[J]. 西北工业大学
Chong Yang, Zhang Ke, Lu Meibai, Tong Xi. Proposing an Effective Discrete-Time ADRC (Active Disturbance Rejection Control) Variable Structure Terminal Guidance Law[J]. Northwestern polytechnical university

离散自抗扰变结构末制导律设计
崇阳, 张科, 吕梅柏, 仝希
西北工业大学 航天学院, 陕西 西安 710072
摘要:
针对未来导弹拦截高速大机动目标高精度制导的需要,为使导弹制导系统具有良好的鲁棒性和精确性。提出了一种离散自抗扰变结构末制导律。首先利用自抗扰控制器中跟踪微分器具有的良好滤波特性,对被噪声污染的视线角速率信号进行滤波。其次通过扩张状态观测器实时估计目标加速度。最后采用了一种基于幂函数趋近律的离散变结构制导律,幂函数趋近律能够有效减弱变结构控制系统中切换函数抖动问题。因此这种离散自抗扰变结构末制导律能够有效克服量测噪声和目标加速度不确定对制导系统的影响。通过对机动目标进行仿真,结果表明该方法可以对输入噪声滤波且对目标加速度实时估计,具有较强的鲁棒性和抗干扰能力。
关键词:    制导律    自抗扰    变结构   
Proposing an Effective Discrete-Time ADRC (Active Disturbance Rejection Control) Variable Structure Terminal Guidance Law
Chong Yang, Zhang Ke, Lu Meibai, Tong Xi
College of Astronautics,Northwestern Polytechnical University,Xi'an 710072,China
Abstract:
In order to intercept high maneuvering target, we propose a discrete-time ADRC variable structure termi-nal guidance Law,which we believe is effective. First,Tracking-Differentiator (TD) filter has good filtering prop-erty; the differential angle of sight with noise pollution can be filtered by using TD filter. Secondly,it can predictthe target real acceleration from the extended state observer (ESO) in real time. Finally,we propose a reaching-law discrete-time variable structure terminal guidance law by using the power function. Power function algorithmcan effectively eliminate high-frequency chattering in switch function of discrete-time sliding mode control system.We present the simulation of maneuvering target; the simulation results and their analysis show preliminarily thatthis law has strong robustness and high guidance precision.
Key words:    acceleration    algorithms    computer simulation    design    functions    mathematical models    measure-ment errors    measurements    robustness(control systems)    schematic diagrams    sliding mode control    target tracking    variable structure control;active disturbance rejection control (ADRC)    extendedstate observer (ESO)    terminal guidance law    tracking differentiator(TD)   
收稿日期: 2012-06-03     修回日期:
DOI:
基金项目: 航空科学基金(20110153003)资助
通讯作者:     Email:
作者简介: 崇阳(1983-),西北工业大学博士研究生,主要从事导弹及航天器制导与控制技术研究。
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