LEADER 04267nam 22005535 450 001 9910765486503321 005 20231115113346.0 010 $a3-031-41969-3 024 7 $a10.1007/978-3-031-41969-0 035 $a(MiAaPQ)EBC30949298 035 $a(Au-PeEL)EBL30949298 035 $a(DE-He213)978-3-031-41969-0 035 $a(CKB)28861485900041 035 $a(EXLCZ)9928861485900041 100 $a20231115d2023 u| 0 101 0 $aeng 135 $aurcnu|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aScheduling and Reconfiguration of Real-Time Systems $eA Supervisory Control Approach /$fby Xi Wang, ZhiWu Li 205 $a1st ed. 2023. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2023. 215 $a1 online resource (218 pages) 311 08$aPrint version: Wang, Xi Scheduling and Reconfiguration of Real-Time Systems Cham : Springer International Publishing AG,c2023 9783031419683 327 $aIntroduction -- Preliminaries of Supervisory Control Theory -- Real-Time Scheduling and Reconfiguration -- Non-Preemptive Scheduling/Reconfiguration Based on Supervisory Control of TDES -- Priority-Free Conditionally-Preemptive Real-Time Scheduling Based on R-W Method -- Modular Scheduling/Reconfiguration with Exact Execution Time Based on R-W Method -- Scheduling/Reconfiguration Based on Supervisory Control of STS -- Conclusion and Future Work. 330 $aThis book presents a methodology for the real-time scheduling problems of real-time systems (RTS) from the viewpoint of control theory. Generally, any system can be viewed as an RTS if it performs real-time application functions and behaves correctly depending on given logical activities and satisfying specified deadlines for the activities. This monograph provides broad views and detailed introductions to supervisory control theory (SCT) and its application in real-time scheduling and reconfiguration. Based on three popular SCT modelling frameworks, discrete-event system (DES), timed DES (TDES), and state-tree structures (STS), the authors provide RTS modelling frameworks; thereafter, SCT is used to find their safe execution sequences. As the main contribution, we use (untimed) DES events to represent the execution and preemption of each individual RTS task. This modelling formalism brings the possibilities to model the preemptions of tasks? executions. Furthermore, in some cases, priorities cannot be assigned to real-time tasks. In order to solve this problem, a matrix-based priority-free conditional-preemption (PFCP) relation is provided, which generalizes fixed-priority (FP) RTS scheduling. As a natural extension, a generalized modular modelling framework is presented to model the task parameters instead of the global real-time task. The modular models are taken to be generic entities, which also considers the exact execution time of real-time tasks. STS are undoubtedly recognized as a computationally efficient SCT framework which manages the state explosion problem significantly. Hence, building on the (untimed) modular RTS models, a novel STS-based RTS modeling framework is formulated, by assigning dynamic priorities as specified optimality criteria, which can be utilized to model sporadic RTS processing both sporadic and (multi-period) periodic tasks, providing a small set of the safe execution sequences which rank at the top. 606 $aComputers, Special purpose 606 $aComputer science 606 $aControl engineering 606 $aSpecial Purpose and Application-Based Systems 606 $aTheory of Computation 606 $aControl and Systems Theory 615 0$aComputers, Special purpose. 615 0$aComputer science. 615 0$aControl engineering. 615 14$aSpecial Purpose and Application-Based Systems. 615 24$aTheory of Computation. 615 24$aControl and Systems Theory. 676 $a629.89 700 $aWang$b Xi$01372991 701 $aLi$b ZhiWu$01448648 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910765486503321 996 $aScheduling and Reconfiguration of Real-Time Systems$93644350 997 $aUNINA