The problem of admissibility analysis and control synthesis of discrete-time switched linear singular （SLS） systems for arbitrary switching laws is solved. By using the switched Lyapunov function approach, some new ...The problem of admissibility analysis and control synthesis of discrete-time switched linear singular （SLS） systems for arbitrary switching laws is solved. By using the switched Lyapunov function approach, some new sufficient conditions under which the SLS system is admissible for arbitrary switching laws are derived in terms of linear matrix inequalities （LMIs）. Based on the admissibility results, control synthesis is then to design switched state feedback and static output feedback controllers, guaranteeing that the resulting closed-loop system is admissible. The presented results can be viewed as the extensions of previous works on switched Lyapunov function approach from the regular switched systems to singular switched cases. Examples are provided to demonstrate the reduced conservatism and effectiveness of the proposed conditions.展开更多
The admissibility analysis and robust admissible control problem of the uncertain discrete-time switched linear singular (SLS) systems for arbitrary switching laws are investigated. Based on linear matrix inequalities...The admissibility analysis and robust admissible control problem of the uncertain discrete-time switched linear singular (SLS) systems for arbitrary switching laws are investigated. Based on linear matrix inequalities, some sufficient conditions are given for: A) the existence of generalized common Lyapunov solution and the admissibility of the SLS systems for arbitrary switching laws, B) the existence of static output feedback control laws ensuring the admissibility of the closed-loop SLS systems for arbitrary switching laws and norm-bounded uncertainties.展开更多
This paper is concerned with the problems of robust admissibility and static output feedback( SOF)stabilization for a class of discrete-time switched singular systems with norm-bounded parametric uncertainties.The obj...This paper is concerned with the problems of robust admissibility and static output feedback( SOF)stabilization for a class of discrete-time switched singular systems with norm-bounded parametric uncertainties.The objective is to design a suitable robust SOF controller guaranteeing the regularity,causality and asymptotic stability of the resulting closed-loop system under arbitrary switching laws. Based on the basic matrix inequality sufficient condition for checking the admissibility of switched singular systems,together with some matrix inequality convexifying techniques,the SOF controller synthesis is developed for the underlying systems. It is shown that the controller gains can be obtained by solving a set of strict linear matrix inequalities( LMIs). A simulation example is given to show the effectiveness of the proposed method.展开更多
空管系统为全国民用航空提供空中交通服务、通信导航监视、航空气象、航行情报服务,是民航运行的枢纽。供电设备故障会严重影响空中交通安全。为确保设备的供电安全,从航管小区供配电系统设计出发,提出基于双市电双油机供电、不间断电源...空管系统为全国民用航空提供空中交通服务、通信导航监视、航空气象、航行情报服务,是民航运行的枢纽。供电设备故障会严重影响空中交通安全。为确保设备的供电安全,从航管小区供配电系统设计出发,提出基于双市电双油机供电、不间断电源(Uninterruptible Power Supply,UPS)并机双路供电、分布式静态转换开关(Static Transfer Switch,STS)供电以及直流应急供电的多重冗余供电体系。在空管设备末端供电设计方面,针对设备结构和管制席位设备及功能,提出优化的冗余供电设计方案。展开更多
为了研究1200 V SiC MOSFET在重复非钳位感性开关(Unclamped-Inductive-Switching,UIS)应力下的电学参数退化机制,基于自行搭建的UIS实验平台以及Sentaurus仿真设计工具,首先深入分析了重复UIS测试后器件静态参数与动态参数的退化;接着...为了研究1200 V SiC MOSFET在重复非钳位感性开关(Unclamped-Inductive-Switching,UIS)应力下的电学参数退化机制,基于自行搭建的UIS实验平台以及Sentaurus仿真设计工具,首先深入分析了重复UIS测试后器件静态参数与动态参数的退化;接着基于FN隧穿公式对栅极漏电流数据进行拟合,得到随着UIS测试次数增加SiC/SiO2界面的势垒高度从2.52 eV逐渐降低到2.06 eV;最后解释了SiC MOSFET在重复UIS测试后的电流输运过程。结果表明,在重复雪崩应力的作用下,大量的正电荷注入至结型场效应管区域上方的栅极氧化层中,影响了该区域的电场分布以及耗尽层厚度,导致被测器件(Device Under Test,DUT)的导通电阻、漏源泄漏电流、电容特性等电学参数呈现出不同程度的退化,并且氧化物中的正电荷的积累也使电子隧穿通过栅介质的电流得到了抬升。展开更多
基金supported partly by the National Natural Science Foundation of China(6057400660835001)+1 种基金the Key Project of Chinese Ministry of Education(108060)the Jiangsu Planned Projects for Postdoctoral Research Funds(0802010c).
文摘The problem of admissibility analysis and control synthesis of discrete-time switched linear singular （SLS） systems for arbitrary switching laws is solved. By using the switched Lyapunov function approach, some new sufficient conditions under which the SLS system is admissible for arbitrary switching laws are derived in terms of linear matrix inequalities （LMIs）. Based on the admissibility results, control synthesis is then to design switched state feedback and static output feedback controllers, guaranteeing that the resulting closed-loop system is admissible. The presented results can be viewed as the extensions of previous works on switched Lyapunov function approach from the regular switched systems to singular switched cases. Examples are provided to demonstrate the reduced conservatism and effectiveness of the proposed conditions.
基金Supported by National Natural Science Foundation of P. R. China (6022130, 60334040, 60428304)
文摘The admissibility analysis and robust admissible control problem of the uncertain discrete-time switched linear singular (SLS) systems for arbitrary switching laws are investigated. Based on linear matrix inequalities, some sufficient conditions are given for: A) the existence of generalized common Lyapunov solution and the admissibility of the SLS systems for arbitrary switching laws, B) the existence of static output feedback control laws ensuring the admissibility of the closed-loop SLS systems for arbitrary switching laws and norm-bounded uncertainties.
基金Sponsored by the National Natural Science Foundation of China Grant No.61004038
文摘This paper is concerned with the problems of robust admissibility and static output feedback( SOF)stabilization for a class of discrete-time switched singular systems with norm-bounded parametric uncertainties.The objective is to design a suitable robust SOF controller guaranteeing the regularity,causality and asymptotic stability of the resulting closed-loop system under arbitrary switching laws. Based on the basic matrix inequality sufficient condition for checking the admissibility of switched singular systems,together with some matrix inequality convexifying techniques,the SOF controller synthesis is developed for the underlying systems. It is shown that the controller gains can be obtained by solving a set of strict linear matrix inequalities( LMIs). A simulation example is given to show the effectiveness of the proposed method.
文摘空管系统为全国民用航空提供空中交通服务、通信导航监视、航空气象、航行情报服务,是民航运行的枢纽。供电设备故障会严重影响空中交通安全。为确保设备的供电安全,从航管小区供配电系统设计出发,提出基于双市电双油机供电、不间断电源(Uninterruptible Power Supply,UPS)并机双路供电、分布式静态转换开关(Static Transfer Switch,STS)供电以及直流应急供电的多重冗余供电体系。在空管设备末端供电设计方面,针对设备结构和管制席位设备及功能,提出优化的冗余供电设计方案。
文摘为了研究1200 V SiC MOSFET在重复非钳位感性开关(Unclamped-Inductive-Switching,UIS)应力下的电学参数退化机制,基于自行搭建的UIS实验平台以及Sentaurus仿真设计工具,首先深入分析了重复UIS测试后器件静态参数与动态参数的退化;接着基于FN隧穿公式对栅极漏电流数据进行拟合,得到随着UIS测试次数增加SiC/SiO2界面的势垒高度从2.52 eV逐渐降低到2.06 eV;最后解释了SiC MOSFET在重复UIS测试后的电流输运过程。结果表明,在重复雪崩应力的作用下,大量的正电荷注入至结型场效应管区域上方的栅极氧化层中,影响了该区域的电场分布以及耗尽层厚度,导致被测器件(Device Under Test,DUT)的导通电阻、漏源泄漏电流、电容特性等电学参数呈现出不同程度的退化,并且氧化物中的正电荷的积累也使电子隧穿通过栅介质的电流得到了抬升。
