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Author: Sven Reimann
Publisher:
ISBN: 9783832539801
Category :
Languages : en
Pages : 0
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Book Description
Modern control systems are usually realized as embedded systems. This typically leads to resource-constrained control systems due to constraints on computing speed, memory size or communication bandwidth. In this thesis, scheduling and control strategies as well as event-triggered control strategies are addressed for handling the limited computation and communication resources. All proposed strategies are designed in a way, such that they can be realized based on output information. Part I focuses on scheduling and control design methods for distributing efficiently the limited computation and communication resources. First, an integrated control and scheduling design is proposed for controlling several plants over one share communication network, which assumes full state measurement. By including a switched observer the control and scheduling can be realized based on output information. Second, a strategy for scheduling a set of PI control tasks with limited computation resources is developed. The focus lies on the scheduling of PI control tasks with low computational overhead. Both presented strategies are online scheduling algorithms, where the scheduling decision is made based on output-feedback information of the plants. This allows a reactiveness to disturbances and reference changes and, hence, an improved control performance compared with offline scheduling algorithms. In Part II, a novel event-triggered PI control concept is developed for setpoint tracking problems. The focus lies on reducing the resource utilization, especially the communication over the feedback link, while maintaining a certain level of performance. An event-triggered PI control strategy is proposed, where both the event-triggering condition and the PI controller are realized periodically, such an implementation can be easily realized in a standard time-sliced embedded software architecture. Further, a control synthesis is presented, which allows to design the control parameters taking the event-triggered implementation into account. All proposed strategies in Part I and Part II are evaluated by simulations and experimental studies in comparison with related approaches from literature, to demonstrate the effectiveness.
Author: Sven Reimann
Publisher:
ISBN: 9783832539801
Category :
Languages : en
Pages : 0
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Book Description
Modern control systems are usually realized as embedded systems. This typically leads to resource-constrained control systems due to constraints on computing speed, memory size or communication bandwidth. In this thesis, scheduling and control strategies as well as event-triggered control strategies are addressed for handling the limited computation and communication resources. All proposed strategies are designed in a way, such that they can be realized based on output information. Part I focuses on scheduling and control design methods for distributing efficiently the limited computation and communication resources. First, an integrated control and scheduling design is proposed for controlling several plants over one share communication network, which assumes full state measurement. By including a switched observer the control and scheduling can be realized based on output information. Second, a strategy for scheduling a set of PI control tasks with limited computation resources is developed. The focus lies on the scheduling of PI control tasks with low computational overhead. Both presented strategies are online scheduling algorithms, where the scheduling decision is made based on output-feedback information of the plants. This allows a reactiveness to disturbances and reference changes and, hence, an improved control performance compared with offline scheduling algorithms. In Part II, a novel event-triggered PI control concept is developed for setpoint tracking problems. The focus lies on reducing the resource utilization, especially the communication over the feedback link, while maintaining a certain level of performance. An event-triggered PI control strategy is proposed, where both the event-triggering condition and the PI controller are realized periodically, such an implementation can be easily realized in a standard time-sliced embedded software architecture. Further, a control synthesis is presented, which allows to design the control parameters taking the event-triggered implementation into account. All proposed strategies in Part I and Part II are evaluated by simulations and experimental studies in comparison with related approaches from literature, to demonstrate the effectiveness.
Author: Robert Klein
Publisher: Springer Science & Business Media
ISBN: 146154629X
Category : Business & Economics
Languages : en
Pages : 379
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Book Description
Project management has become a widespread instrument enabling organizations to efficiently master the challenges of steadily shortening product life cycles, global markets and decreasing profit margins. With projects increasing in size and complexity, their planning and control represents one of the most crucial management tasks. This is especially true for scheduling, which is concerned with establishing execution dates for the sub-activities to be performed in order to complete the project. The ability to manage projects where resources must be allocated between concurrent projects or even sub-activities of a single project requires the use of commercial project management software packages. However, the results yielded by the solution procedures included are often rather unsatisfactory. Scheduling of Resource-Constrained Projects develops more efficient procedures, which can easily be integrated into software packages by incorporated programming languages, and thus should be of great interest for practitioners as well as scientists working in the field of project management. The book is divided into two parts. In Part I, the project management process is described and the management tasks to be accomplished during project planning and control are discussed. This allows for identifying the major scheduling problems arising in the planning process, among which the resource-constrained project scheduling problem is the most important. Part II deals with efficient computer-based procedures for the resource-constrained project scheduling problem and its generalized version. Since both problems are NP-hard, the development of such procedures which yield satisfactory solutions in a reasonable amount of computation time is very challenging, and a number of new and very promising approaches are introduced. This includes heuristic procedures based on priority rules and tabu search as well as lower bound methods and branch and bound procedures which can be applied for computing optimal solutions.
Author: Christian Artigues
Publisher: John Wiley & Sons
ISBN: 1118623703
Category : Technology & Engineering
Languages : en
Pages : 235
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Book Description
This title presents a large variety of models and algorithms dedicated to the resource-constrained project scheduling problem (RCPSP), which aims at scheduling at minimal duration a set of activities subject to precedence constraints and limited resource availabilities. In the first part, the standard variant of RCPSP is presented and analyzed as a combinatorial optimization problem. Constraint programming and integer linear programming formulations are given. Relaxations based on these formulations and also on related scheduling problems are presented. Exact methods and heuristics are surveyed. Computational experiments, aiming at providing an empirical insight on the difficulty of the problem, are provided. The second part of the book focuses on several other variants of the RCPSP and on their solution methods. Each variant takes account of real-life characteristics which are not considered in the standard version, such as possible interruptions of activities, production and consumption of resources, cost-based approaches and uncertainty considerations. The last part presents industrial case studies where the RCPSP plays a central part. Applications are presented in various domains such as assembly shop and rolling ingots production scheduling, project management in information technology companies and instruction scheduling for VLIW processor architectures.
Author: Ewa Ratajczak-Ropel
Publisher: Springer
ISBN: 3319628933
Category : Technology & Engineering
Languages : en
Pages : 247
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Book Description
This book addresses two of the most difficult and computationally intractable classes of problems: discrete resource constrained scheduling, and discrete-continuous scheduling. The first part of the book discusses problems belonging to the first class, while the second part deals with problems belonging to the second class. Both parts together offer valuable insights into the possibility of implementing modern techniques and tools with a view to obtaining high-quality solutions to practical and, at the same time, computationally difficult problems. It offers a valuable source of information for practitioners dealing with the real-world scheduling problems in industry, management and administration. The authors have been working on the respective problems for the last decade, gaining scientific recognition through publications and active participation in the international scientific conferences, and their results are obtained using population-based methods. Dr E. Ratajczk-Ropel explores multiple agent and A-Team concepts, while Dr A. Skakovski focuses on evolutionary algorithms with a particular focus on the population learning paradigm.
Author: Ulrich Dorndorf
Publisher: Springer Science & Business Media
ISBN: 9783790815160
Category : Business & Economics
Languages : en
Pages : 180
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Book Description
Project Scheduling is concerned with the allocation of scarce resources over time. The rich optimisation models with time windows that are treated in this book cover a multitude of practical decision problems arising in diverse application areas such as construction engineering or make-to-order production planning. The book shows how Constraint Propagation techniques from Artificial Intelligence can be successfully combined with Operations Research methods for developing powerful exact and heuristic solution algorithms for a very general class of scheduling problems. Example applications demonstrate the effectiveness of the approach.
Author: Christoph Schwindt
Publisher: Springer
ISBN: 3319054430
Category : Business & Economics
Languages : en
Pages : 691
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Book Description
Due to the increasing importance of product differentiation and collapsing product life cycles, a growing number of value-adding activities in the industry and service sector are organized in projects. Projects come in many forms, often taking considerable time and consuming a large amount of resources. The management and scheduling of projects represents a challenging task, and project performance may have a considerable impact on an organization's competitiveness. This handbook presents state-of-the-art approaches to project management and scheduling. More than sixty contributions written by leading experts in the field provide an authoritative survey of recent developments. The book serves as a comprehensive reference, both, for researchers and project management professionals. The handbook consists of two volumes. Volume 1 is devoted to single-modal and multi-modal project scheduling. Volume 2 presents multi-project problems, project scheduling under uncertainty and vagueness, managerial approaches and a separate part on applications, case studies and information systems.
Author: Bo Huang
Publisher: John Wiley & Sons
ISBN: 1119619696
Category : Technology & Engineering
Languages : en
Pages : 288
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Book Description
Presents strategies with reachability graph analysis for optimizing resource allocation systems Supervisory Control and Scheduling of Resource Allocation Systems offers an important guide to Petri net (PN) models and methods for supervisory control and system scheduling of resource allocation systems (RASs). Resource allocation systems are common in automated manufacturing systems, project management systems, cloud data centers, and software engineering systems. The authors—two experts on the topic—present a definition, techniques, models, and state-of-the art applications of supervisory control and scheduling problems. The book introduces the basic concepts and research background on resource allocation systems and Petri nets. The authors then focus on the deadlock-free supervisor synthesis for RASs using Petri nets. The book also investigates the heuristic scheduling of RASs based on timed Petri nets. Conclusions and open problems are provided in the last section of the book. This important book: Includes multiple methods for supervisory control and scheduling with reachability graphs, and provides illustrative examples Reveals how to accelerate the supervisory controller design and system scheduling of RASs based on PN reachability graphs, with optimal or near-optimal results Highlights both solution quality and computational speed in RAS deadlock handling and system scheduling Written for researchers, engineers, scientists, and professionals in system planning and control, engineering, operation, and management, Supervisory Control and Scheduling of Resource Allocation Systems provides an essential guide to the supervisory control and scheduling of resource allocation systems (RASs) using Petri net reachability graphs, which allow for multiple resource acquisitions and flexible routings.
Author: Jacek Błażewicz
Publisher:
ISBN:
Category : Operations research
Languages : en
Pages : 380
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Book Description
Author: Kevin Basil Gerard Luxford
Publisher:
ISBN:
Category : Production scheduling
Languages : en
Pages : 166
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Book Description
Author: Artin Avanes
Publisher:
ISBN:
Category :
Languages : en
Pages : 204
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Book Description
