摘要
针对制导炮弹非线性模型且带有不确定气动参数的情况,研究采用反步法与I&I方法相结合的方式来设计控制器。首先建立了参数估计误差流形,再通过控制器输入及参数适应率确保该流形不变且吸引,让参数估计误差在这一流形上趋向于0,采用该方法设计的参数估计器不必遵循确定性——等价性原理,最后由Lyapunov稳定性理论验证了炮弹闭环控制系统的稳定性。仿真结果表明,基于该方法设计的控制器在部分气动系数不确定的情况下仍能精确跟踪攻角。
To nonlinear model of guided projectile with some uncertain and unknown aerodynamic parameters,a controller was designed by combining the backstepping with immersion and invariance （I＆amp;I）. First,a manifold that denotes the parameter estimation error was set up ,then its invariance and attractiveness were maintained by the input of controller and parameter adaptive rate so that the estimation error will converge to zero on this manifold.It was not necessary for the parameter estimator to obey the certainty -equivalence principle.Finally,the stability of the closed-loop control system of the projectile was verified by Lyapunov stability theory.The simulation result shows that the proposed control system can accomplish the trajectory control of the angle of attack under the condition of uncertainty of aerodynamic parameters .
出处
《电光与控制》
北大核心
2014年第3期18-22,共5页
Electronics Optics & Control
基金
中国博士后基金(20100481145)
中央高校基本科研专项资金(NUST2011YBXM25)
作者简介
陈圣（1989-），男，安徽阜阳人，硕士生，研究方向为飞行器飞行动力学与控制系统设计。
