摘要
基于双滑模变结构控制理论,对切换面的选取和控制量的切换规律做了进一步的分析,提出两个切换面可以分开单独设计,通过状态反馈保证在滑模区上的稳定性;在具有非匹配不确定性的情况下,证明了控制量的设计能够满足滑模控制的可达条件;提出了更简单的控制律设计方法,保证状态轨迹分别在两条滑模区上来回切换,降低了控制量振动频率。用动态平衡的方法,通过控制导弹的平衡迎角达到了控制加速度的目的。针对某型导弹纵向回路线性模型和非线性时变模型进行了仿真研究,结果证明了设计的可行性和有效性。
On the basis of double-sliding modes variable structure control theories, new design methods of switching surfaces and changing rules of inputs are analyzed. The two switching surfaces can be de- signed separately, using state-feedback to guarantee the stability; In the system with unmatched uncertainties, the inputs can trap the state trajectory on the switching surfaces; More simple changing rules of inputs are used. Then the state trajectory will hit one of the switching surfaces alternately, so the switching frequency is reduced. Using balanceable attack angle （sideslip angle）, ＂Acceleration Control＂ is realized. Simulations of a linear model and a time-varying nonlinear model are given; the results show the effectiveness and feasibility of the proposed methods.
出处
《飞行力学》
CSCD
北大核心
2005年第4期67-70,共4页
Flight Dynamics
关键词
双滑模
变结构控制
平衡迎角
加速度控制
double-sliding modes
variable structure control
balanceable attack angle
acceleration control
