Based on input-output approach, the robust stability and stabilization problems for uncertain singular systems with time-varying delays are investigated. The parameter uncertainties are assumed to be norm-bounded and ...Based on input-output approach, the robust stability and stabilization problems for uncertain singular systems with time-varying delays are investigated. The parameter uncertainties are assumed to be norm-bounded and the time-varying delays include both discrete delay and distributed delay. By introducing a new input-output model, the time-delay system is embedded in a family of systems with a forward system without time delay and a dynamical feedback uncertainty. A sufficient and necessary condition, which guarantees the system regular, impulse-free and stable for all admissible uncertainties, is obtained. Based on the strict linear matrix inequality, the desired robust state feedback controller is also obtained. Finally, a numerical example is provided to demonstrate the application of the proposed method.展开更多
The design problem of delay-dependent robust control for uncertain discrete singular systems with time-varying delay is addressed in this paper. The uncertainty is assumed to be norm-bounded. By establishing a finite ...The design problem of delay-dependent robust control for uncertain discrete singular systems with time-varying delay is addressed in this paper. The uncertainty is assumed to be norm-bounded. By establishing a finite sum inequality based on quadratic terms, a new delay-dependent robust stability condition is derived and expressed in terms of linear matrix inequalities (LMIs). A suitable robust state feedback control law is presented, which guarantees that the resultant closed-loop system is regular, causal and stable for all admissible uncertainties. Numerical examples are given to demonstrate the applicability of the proposed method.展开更多
In this paper,we propose a hardware design for an effective real time indoor localization system for staff working in high-risk manufacturing areas.Because of the special requirements of our system,the chirp spread sp...In this paper,we propose a hardware design for an effective real time indoor localization system for staff working in high-risk manufacturing areas.Because of the special requirements of our system,the chirp spread spectrum(CSS) is the most suitable indoor localization technology.The details of the new localization system are described.The system involves several anchors,tags,and a gateway,all of which use the nanoLOC TRX transceiver(NA5TR1) RF chip(Nanotron Co.,Germany),which is based on the CSS technology.To validate the effectiveness of our system,both ranging and localization tests were carried out.The difference between the ranging accuracy indoors and outdoors was small.The localization system can position indoor mobile staff precisely,enabling the establishment of an emergency rescue mechanism.展开更多
基金Project supported by the Key Program of the National NaturalScience Foundation of China (No. 60434020)the National Natural Science Foundation of China (No. 60604003)
文摘Based on input-output approach, the robust stability and stabilization problems for uncertain singular systems with time-varying delays are investigated. The parameter uncertainties are assumed to be norm-bounded and the time-varying delays include both discrete delay and distributed delay. By introducing a new input-output model, the time-delay system is embedded in a family of systems with a forward system without time delay and a dynamical feedback uncertainty. A sufficient and necessary condition, which guarantees the system regular, impulse-free and stable for all admissible uncertainties, is obtained. Based on the strict linear matrix inequality, the desired robust state feedback controller is also obtained. Finally, a numerical example is provided to demonstrate the application of the proposed method.
基金Project (Nos. 60434020 and 60604003) supported by the NationalNatural Science Foundation of China
文摘The design problem of delay-dependent robust control for uncertain discrete singular systems with time-varying delay is addressed in this paper. The uncertainty is assumed to be norm-bounded. By establishing a finite sum inequality based on quadratic terms, a new delay-dependent robust stability condition is derived and expressed in terms of linear matrix inequalities (LMIs). A suitable robust state feedback control law is presented, which guarantees that the resultant closed-loop system is regular, causal and stable for all admissible uncertainties. Numerical examples are given to demonstrate the applicability of the proposed method.
基金Project (No. KYH063112027) supported by the Department of Science and Technology of Zhejiang Province,China
文摘In this paper,we propose a hardware design for an effective real time indoor localization system for staff working in high-risk manufacturing areas.Because of the special requirements of our system,the chirp spread spectrum(CSS) is the most suitable indoor localization technology.The details of the new localization system are described.The system involves several anchors,tags,and a gateway,all of which use the nanoLOC TRX transceiver(NA5TR1) RF chip(Nanotron Co.,Germany),which is based on the CSS technology.To validate the effectiveness of our system,both ranging and localization tests were carried out.The difference between the ranging accuracy indoors and outdoors was small.The localization system can position indoor mobile staff precisely,enabling the establishment of an emergency rescue mechanism.
