轧机液压伺服位置系统的自适应输出反馈控制  

Adaptive output-feedback control for hydraulic servo position system of rolling mill

作　　者：李建雄[1] 方一鸣[1,2] 石胜利[1] 

机构地区：[1]燕山大学工业计算机控制工程河北省重点实验室,河北秦皇岛066004 [2]国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《电机与控制学报》2012年第1期104-110,共7页Electric Machines and Control

基　　金：国家自然科学基金(61074099)

摘　　要：针对具有不可测状态、未知参数和非线性的轧机液压伺服位置系统,提出一种基于高增益观测器和参数估计器的自适应输出反馈控制算法。所构造的高增益观测器不依赖于系统输入和参数估计值,它只用于估计系统状态,所设计的动态反馈控制器包括:用于保证系统稳定性的主反馈部分和抵消外部扰动和一些不确定性的补偿部分。理论分析表明,所提出的控制算法能够保证闭环系统的所有信号有界,且系统状态及其估计误差的最终收敛边界依赖于观测器的高增益值。以某650 mm可逆冷带轧机液压伺服位置系统为例进行仿真,仿真结果验证了所提出算法的有效性。A high-gain observer and parameter estimator based adaptive output feedback control algorithm is proposed for hydraulic servo position system of rolling mill which contains unmeasurable states, unknown parameters and nonlinearies. The constructed high-gain observer is independent on control input and estimates of the unknown parameters, which is only employed to estimate the system state. The designed feedback controller contained two parts： the main feedback part which was used to ensure the system stability and the compensative part which was used to attenuate the external disturbance and some un- certainties. It can be proved that the proposed algorithm can guarantee all the signals of the resulting closed-loop system are bounded, and the boundaries of the system state and its estimation error are defined by the given high-gain. Finally, simulation was carried out on the hydraulic servo position system of 650mm reversing cold-strip rolling mill. And the simulation results show the validity of the proposed method.

关 键 词：液压伺服位置系统 输出反馈控制 高增益观测器 参数估计 最终有界稳定 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]