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020 _a9783031419690
_9978-3-031-41969-0
024 7 _a10.1007/978-3-031-41969-0
_2doi
050 4 _aQA76.5-.73
072 7 _aUYQE
_2bicssc
072 7 _aCOM011000
_2bisacsh
072 7 _aUYQE
_2thema
082 0 4 _a004
_223
100 1 _aWang, Xi.
_eauthor.
_0(orcid)
_10000-0002-6427-8090
_4aut
_4http://id.loc.gov/vocabulary/relators/aut
245 1 0 _aScheduling and Reconfiguration of Real-Time Systems
_h[electronic resource] :
_bA Supervisory Control Approach /
_cby Xi Wang, ZhiWu Li.
250 _a1st ed. 2023.
264 1 _aCham :
_bSpringer International Publishing :
_bImprint: Springer,
_c2023.
300 _aXIX, 205 p. 128 illus., 29 illus. in color.
_bonline resource.
336 _atext
_btxt
_2rdacontent
337 _acomputer
_bc
_2rdamedia
338 _aonline resource
_bcr
_2rdacarrier
347 _atext file
_bPDF
_2rda
505 0 _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.
520 _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.
650 0 _aComputers, Special purpose.
650 0 _aComputer science.
650 0 _aControl engineering.
650 1 4 _aSpecial Purpose and Application-Based Systems.
650 2 4 _aTheory of Computation.
650 2 4 _aControl and Systems Theory.
700 1 _aLi, ZhiWu.
_eauthor.
_4aut
_4http://id.loc.gov/vocabulary/relators/aut
710 2 _aSpringerLink (Online service)
773 0 _tSpringer Nature eBook
776 0 8 _iPrinted edition:
_z9783031419683
776 0 8 _iPrinted edition:
_z9783031419706
776 0 8 _iPrinted edition:
_z9783031419713
856 4 0 _uhttps://doi.org/10.1007/978-3-031-41969-0
912 _aZDB-2-SCS
912 _aZDB-2-SXCS
942 _cSPRINGER
999 _c186038
_d186038