04267nam 22005535 450 991076548650332120231115113346.03-031-41969-310.1007/978-3-031-41969-0(MiAaPQ)EBC30949298(Au-PeEL)EBL30949298(DE-He213)978-3-031-41969-0(CKB)28861485900041(EXLCZ)992886148590004120231115d2023 u| 0engurcnu||||||||txtrdacontentcrdamediacrrdacarrierScheduling and Reconfiguration of Real-Time Systems A Supervisory Control Approach /by Xi Wang, ZhiWu Li1st ed. 2023.Cham :Springer International Publishing :Imprint: Springer,2023.1 online resource (218 pages)Print version: Wang, Xi Scheduling and Reconfiguration of Real-Time Systems Cham : Springer International Publishing AG,c2023 9783031419683 Introduction -- 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.This 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.Computers, Special purposeComputer scienceControl engineeringSpecial Purpose and Application-Based SystemsTheory of ComputationControl and Systems TheoryComputers, Special purpose.Computer science.Control engineering.Special Purpose and Application-Based Systems.Theory of Computation.Control and Systems Theory.629.89Wang Xi1372991Li ZhiWu1448648MiAaPQMiAaPQMiAaPQBOOK9910765486503321Scheduling and Reconfiguration of Real-Time Systems3644350UNINA