摘要
在风机系统速度控制器设计和闭环系统稳定性分析时,应用李雅普诺夫(Lyapunov)稳定性理论可以有效地提高风机速度控制系统的控制性能。文章基于李雅普诺夫稳定性理论研究了一类转动负载为不确定非线性函数的风机速度控制系统,通过引入辅助变量估计未知参数并应用反步法设计速度控制器,探索了风机速度对于给定参考速度的全局渐近跟踪控制问题。结果表明:基于李雅普诺夫稳定性理论证明了所设计的速度控制器能够实现对任意给定速度的渐近跟踪控制并达到稳定状态;Matlab仿真结果验证了控制算法的有效性,控制方案对风机速度控制系统中存在的未知参数具有良好的稳定性。
Lyapunov stability theory plays an important role in improving the control performance for the fan speed control system,and provides an effective tool for the speed controller design and stability analysis in closed-loop system.Assuming that the load torque is a nonlinear uncertain function in a fan speed control system,with the help of the introduced auxiliary variables estimating the unknown parameters,the backstepping design procedure is invoked to construct the armature current and achieve the asymptotic tracking control for any given reference speed.The Lyapunov stability can be realized for the closed-loop system.The effectiveness of the proposed control method is verified by computer simulations on Matlab.The simulation results demonstrate that the proposed control scheme could realize the asymptotic tracking control for any given speed in the case of nonlinear load torque and moreover is stable for the unknown parameters in the fan speed control systems.
作者
于江波
刘怡彤
石啊莲
YU Jiangbo;LIU Yitong;SHI Alian(School of Science, Shandong Jianzhu University, Jinan 250101, China;School of Mathematics, Qilu Normal University, Jinan 250200, China)
出处
《山东建筑大学学报》
2020年第5期35-41,共7页
Journal of Shandong Jianzhu University
基金
国家自然科学基金项目(61803228)
中国博士后科学基金项目(2017M612271)。
