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The co-design of scheduling and control of the network control system with resource constraints

Author: DuMingLi
Tutor: ZhouChuan
School: Nanjing University of Technology and Engineering
Course: Control Theory and Control Engineering
Keywords: Network Control System Network resource constraints Quantization scheduling algorithm Collaborative design Switching system
CLC: TP13
Type: Master's thesis
Year: 2012
Downloads: 35
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Abstract


In the network control system , a network resource constraint is an important factor affecting the control of the system performance is mainly caused by limited network bandwidth . This article studied the problem of scheduling and control co-design for networked control systems with resource constraints , The paper specific work arrangements are as follows : First, MEF-TOD proposed a dynamic scheduling algorithm with feedback controller co-design method for a class of random networked control systems with communication constraints . Consider the impact of communication constraints and random delay system is modeled as a switching system with parameter uncertainty discrete time switching system theory and Lyapunov stability theory, given the state feedback based scheduling algorithm MEF-TOD controller and robust H ∞ controller design method , the closed-loop system is asymptotically stable and has a good robustness . Secondly, the networked control system for a class with a bit rate constraints , it is proposed to quantify the scheduling algorithm with feedback controller collaborative design method based on static cycle . Level - center - uniform quantization by allocating bandwidth to determine the quantitative accuracy of the quantizer , considered binding in order to quantify the scheduling algorithm , fan- sector approach to quantization error , quantization error is equivalent to a fan-shaped sector uncertainty the system is modeled as a discrete switched systems with parametric uncertainties , which gives the algorithm under the state feedback controller and robust H ∞ controller design method , to ensure the stability and robustness of the system . Again , for a class of limited-bandwidth the delay network control system , a MEF-TOD - based dynamic scheduling algorithm with dynamic output feedback control co-design method to quantify . Using uniform quantizer level - the center of the encoded bits of the quantizer is determined according to the minimum accuracy of the signal being transmitted in claim MEF-TOD scheduling algorithm scheduling network node , re-use , the system is modeled as a discrete switching system, thereby giving in the algorithm under dynamic output feedback controller design method , the closed-loop system is asymptotically stable . Finally , according to the content of the study , the simulation model based on network control system Truetime simulation toolbox structures , simulation design . Simulation results show that the methods studied in this paper are valid .

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