The H_∞ performance analysis and controller design for linear networked control systems(NCSs) are presented.The NCSs are considered a linear continuous system with time-varying interval input delay by assuming that t...The H_∞ performance analysis and controller design for linear networked control systems(NCSs) are presented.The NCSs are considered a linear continuous system with time-varying interval input delay by assuming that the sensor is time-driven and the logic Zero-order-holder(ZOH) and controller are event-driven.Based on this model,the delay interval is divided into two equal subintervals for H_∞ performance analysis.An improved H_∞ stabilization condition is obtained in linear matrix inequalities(LMIs) framework by adequately considering the information about the bounds of the input delay to construct novel Lyapunov–Krasovskii functionals(LKFs).For the purpose of reducing the conservatism of the proposed results,the bounds of the LKFs differential cross terms are properly estimated without introducing any slack matrix variables.Moreover,the H_∞ controller is reasonably designed to guarantee the robust asymptotic stability for the linear NCSs with an H_∞ performance level γ.Numerical simulation examples are included to validate the reduced conservatism and effectiveness of our proposed method.展开更多
基金Supported by the National Natural Science Foundation of China(No.50879090 and No.51509256)the Key Program of Hydrodynamics of China(No.9140A1403071251311044)+1 种基金the Aeronautical Science Foundation of China(Grant No.20152316005)the Innovation Research Foundation for Ph.D.Candidates of Naval University of Engineering(Grant No.4142C15F)~~
文摘本文基于三维移动脉动源格林函数(Three Dimensional Translating-Pulsating source Green function,3DTP)求解的水动力系数,通过频时域转换法求解时延函数,建立了船舶耐波性时域计算方法,比较了在平动坐标系和随动坐标系下求解船体运动方程对运动计算结果的影响,并与频域计算结果和试验结果进行了对比。结果表明,采用频时域转换法求解时延函数快速高效。在耐波性平动坐标系下求解船体运动方程得到的运动结果与频域结果相比存在偏差,在重心随动坐标系下求解船体运动方程得到的运动结果与频域结果和试验结果吻合良好。
基金Project (61304046) supported by the National Natural Science Funds for Young Scholar of ChinaProject (F201242) supported by Natural Science Foundation of Heilongjiang Province,China
文摘The H_∞ performance analysis and controller design for linear networked control systems(NCSs) are presented.The NCSs are considered a linear continuous system with time-varying interval input delay by assuming that the sensor is time-driven and the logic Zero-order-holder(ZOH) and controller are event-driven.Based on this model,the delay interval is divided into two equal subintervals for H_∞ performance analysis.An improved H_∞ stabilization condition is obtained in linear matrix inequalities(LMIs) framework by adequately considering the information about the bounds of the input delay to construct novel Lyapunov–Krasovskii functionals(LKFs).For the purpose of reducing the conservatism of the proposed results,the bounds of the LKFs differential cross terms are properly estimated without introducing any slack matrix variables.Moreover,the H_∞ controller is reasonably designed to guarantee the robust asymptotic stability for the linear NCSs with an H_∞ performance level γ.Numerical simulation examples are included to validate the reduced conservatism and effectiveness of our proposed method.
