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Coupling design of least-square-like scheduling and control
Author(s): 
Pages: 107-116
Year: Issue:  10
Journal: Electric Machines and Control

Keyword:  networked control systemsleast-square-like schedulingshort random delaylyapunov sta-bilitylinear matrix inequalities;
Abstract: First, a new scheduling scheme called least-square-like scheduling ( LSLS ) scheme, which combines priority-based scheduling with communication sequence ( or scheduling sequence ) , was pro-posed. Measurements from sensors were sent to LSLS scheduler in each sampling period, and then the scheduler was compared with the measurements determined by the scheduling sequence of LSLS with the states of the ideal dynamics which are determined by the same sequence. The variances between actual states and ideal states were hence calculated. In this context, the states corresponding to the scheduling sequence of bigger variance gained the access to network. Second, the networked control system with me-dium access constraint and short random delay was modeled as a switched system that switches according to the scheduling sequence. The stability was analyzed and the coupling design of control and scheduling was completed by Lyapunov stability theory and linear matrix inequalities ( LMI) method. Finally, the control performance of the proposed coupling design of LSLS and control is demonstrated by simulation. It is shown that the control performance of the proposed coupling design algorithm is better than the one of the coupling design of maximum error first with try once discard ( MEF-TOD) scheduling and control.
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