自适应模糊滑模控制在火箭炮电液伺服系统中的应用

Application of Adaptive Fuzzy Sliding Mode Control to Rocket Launcher Electro-hydraulic Position Servo System

针对某火箭炮电液位置伺服系统,提出了一种自适应模糊滑模控制方法。为了使等效控制器的设计不依赖于对象的精确数学模型,利用切换函数及其变化率设计了自适应模糊系统来代替等效控制,并且为了解决抖振问题,利用抖振参数和切换函数的绝对值设计了模糊系统动态调节边界层厚度。仿真结果表明,该方法不仅能保证系统的响应速度和控制精度,有效抑制抖振,并且对结构参数不确定性具有很强的鲁棒性。

An adaptive fuzzy sliding mode control approach was proposed to control the electro-hydraulic position servo system of a certain type of rocket launcher.The proposed technique has two merits.First,the equivalent controller is substituted by an adaptive fuzzy system constructed based on the switching function and its change rate,so the design of equivalent control system is independent of an accurate mathematical model which is difficult to obtain in practice.Second,the thickness of the boundary layer is tuned online by a fuzzy system which is designed based on the chattering variable and the absolute value of the switching function,therefore the chattering problem is also avoided.The simulation results show that the proposed approach can guarantee the response speed and accuracy, avoids the chattering problem effectively,and possesses a strong robustness to structure parameter uncertainties.