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检索条件"任意字段=Proceedings First Int Conf Event Based Control Commu Signal Processing"

共 45 条记录，以下是11-20 订阅

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An event-based PI controller Autotuning Technique for integral Processes 1

An Event-based PI Controller Autotuning Technique for Integr...

引用

proceedings first int conf event based control commu signal processing

作者： Beschi, Manuel Dormido, Sebastian Sanchez, Jose Visioli, Antonio CNR Ist Tecnol Ind & Automaz Milan Italy UNED Dept Informat & Automat Madrid Spain Univ Brescia Dipartimento Ingn Meccan & Ind Brescia Italy

ISBN: (纸本)9781467378888

In this paper we propose an autotuning methodology for a symmetrical send-on-delta PI controller for integral processes. In particular, a technique already proposed for self-regulating processes is extended to deal with non self-regulating processes. It is based on the estimation of the parameters of an integrator-plus-dead-time transfer function by means of a single relay-feedback experiment where a roughly tuned PI controller is also used in the feedback system. Then, new controller parameters can be selected based on the identified process model. Simulation results demonstrate the effectiveness of the methodology.

关键词： control systems Limit-cycles Process control Sensors Time-frequency analysis Tuning

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event-based Consensus in Directed Network Topologies with Linear Dynamic Agents 1

Event-based Consensus in Directed Network Topologies with Li...

引用

proceedings first int conf event based control commu signal processing

作者： Noorbakhsh, S. Mohammad Ghaisari, Jafar Isfahan Univ Technol Deptartment Elect & Comp Engn Esfahan *** Iran

ISBN: (纸本)9781467378888

This paper considers consensus problem for multi-agent systems with general linear dynamics communicating over a directed topology and proposes an event-based consensus controller which guarantees asymptotic stability along with decreasing in data transmission among agents. A co-design procedure is given to determine the parameters of the event-triggered transmission protocol and the consensus controller, simultaneously. In the proposed approach, each agent broadcasts data to the neighbors just at its own trigger instants, unlike to the most existing related works in which continuous communication among agents was required. As a result, such control scheme decreases the network bandwidth usage, sensor energy consumption, and actuator wears. The stability of the closed-loop system under event-based controller is proved analytically. Furthermore, Zeno behavior exclusion is discussed analytically. The effectiveness of the proposed controller is illustrated by simulation results.

关键词： event-triggered control onsensus problem Multi-agent systems Linear agents

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event-based thermal control for high-density processors 1

Event-based thermal control for high-density processors

引用

proceedings first int conf event based control commu signal processing

作者： Leva, Alberto Terraneo, Federico Fornaciari, William Politecn Milan Dipartimento Elettron Informaz & Bioingn Piazza Leonardo da Vinci 32 I-20133 Milan Italy

ISBN: (纸本)9781467378888

The increasing computational density of modern processors, and the advent of 3D chip layouts, are making thermal control a requirement, often crucial for the life itself of the device. In demanding applications, traditional on/ off control solutions - based e. g. on clock gating - cannot deliver the required regulation quality if not unacceptably reducing the computational performance of the system, while schemes based on modulating control require so fast sampling rates to cause an equally unacceptable overhead. In this paper we present an event-based thermal control scheme, capable of guaranteeing safe operation with a low effort. We also show how the proposed solution can be divided into a hardware and a software part, further improving efficiency. The claims above are supported by cycle-accurate simulations on a literature benchmark.

关键词： Hardware Libraries Object oriented modeling Program processors Temperature control Thermal management

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event-based CODING OF STILL IMAGES USING A BIO-INSPIRED FRAME 1

EVENT-BASED CODING OF STILL IMAGES USING A BIO-INSPIRED FRAM...

引用

proceedings first int conf event based control commu signal processing

作者： Doutsi, Effrosyni Fillatre, Lionel Antonini, Marc Gaulmin, Julien Univ Nice Sophia Antipolis CNRS I3S UMR 7271 F-06900 Sophia Antipolis France 4G TECHNOL F-06370 Mouans Sartoux France

ISBN: (纸本)9781467378888

The growing interest of event-based systems has influenced image processing field and is expected to be a groundbreaking architecture for image and video compression. The human visual system is an efficient event-based biological system which is a source of inspiration to design an event-based codec. This paper introduces a bio-inspired encoding architecture for still images. A bio-inspired filter is first applied to the input image and then the retinal-filtered image is fed to an integrate And Fire (IAF) sampler. The spike train produced by the IAF sampler is decoded in order to reconstruct the still image at the receiver. We prove that the retinal filter has a frame structure, so the reconstruction is almost perfect provided that the IAF sampling is sufficiently fine.

关键词： event-based systems bio-inspired processing spatiotemporal filter integrate And Fire sampling

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event based control Applied to Wireless Throttling Valves 1

Event Based Control Applied to Wireless Throttling Valves

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proceedings first int conf event based control commu signal processing

作者： Blevins, Terry Nixon, Mark Wojsznis, Willy Emerson Proc Management Future Control Architecture Round Rock TX USA

ISBN: (纸本)9781467378888

This paper addresses the PID modifications and communication support that enable effective control using wireless throttling valves. To conserve the battery power used by a wireless positioner, the PID in a control system can be modified to minimize changes to the actuator position.. Effectively, a controller's output to an actuator is event-driven. It is not based on regular scan periods. A new WirelessHART command is proposed that allows the PID to compensate for communications delays from the control system to wireless throttling valve. This paper presents the performance achieved in a flow lab using an industrial size prototype wireless throttling valve in closed loop control of a liquid flow process. In this wireless control field trial, control performance using a wireless valve was evaluated using both a wired and wireless transmitter for the flow measurement.

关键词： wireless control throttling valve WirelssHART PIDPlus

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Model Predictive control with event Driven Operation 1

Model Predictive Control with Event Driven Operation

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proceedings first int conf event based control commu signal processing

作者： Wojsznis, Willy K. Blevins, Terry Nixon, Mark J. Emerson Proc Management Future Control Architecture Innovat Ctr Austin TX 78759 USA

ISBN: (纸本)9781467378888

Model Predictive control (MPC) operation is based on the process model, which can be conveniently used in event-based MPC operation. The process model can estimate control parameters when a measurement fails or when lab sampling is used as a control parameter. Wireless control is another case in which event-based MPC operation, including both slow sampling and randomness, is required. MPC wireless operation has been validated on a Divided Wall Column (DWC) process which can provide potentially huge savings in energy and capital cost compared to a conventional column design. In the installation at the University of Texas, WirelessHART transmitters take many of the process measurements used in control. This paper details event driven wireless MPC operation and design and discusses the application challenges illustrated by the test results.

关键词： Model Predictive control event Driven control Wireless control Multi Rate MPC control

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Relay-type Safeguarding Regulator for MPC with Unknown Computational Time 1

Relay-type Safeguarding Regulator for MPC with Unknown Compu...

引用

proceedings first int conf event based control commu signal processing

作者： Demenkov, Max Inst Control Sci Profsoyuznaya Str 65 Moscow 117997 Russia

ISBN: (纸本)9781467378888

A hot topic of research in the model predictive control community is the real-time implementation of MPC controllers for "fast" systems (e.g. in automotive and aerospace applications). The controller needs to optimize a control sequence on-line while maintaining strict constraints on the time of computations. In this work-in-progress paper we discuss the possibility of asynchronous MPC computations while maintaining the stability of the closed-loop system. In case the computations cannot be performed within the available time slot and this can affect the stability of the closed-loop system, a second controller is activated, which is based on the explicitly constructed MPC cost function. In the case of continuous linear plant dynamics and polyhedral cost, this approach leads to the easily implementable relay-type control.

关键词： Cost function Lyapunov methods Predictive control Regulators Stability analysis

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Dynamic event-triggered control under Packet Losses: The Case with Acknowledgements 1

Dynamic Event-triggered Control under Packet Losses: The Cas...

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proceedings first int conf event based control commu signal processing

作者： Dolk, V. S. Heemels, W. P. M. H. Eindhoven Univ Technol Dept Mech Engn Control Syst Technol Grp Eindhoven Netherlands

ISBN: (纸本)9781467378888

In this paper, a dynamic ETC strategy for nonlinear state-feedback systems is proposed that results in guarantees for a finite L-p-gain from disturbance input to performance output and a strictly positive lower bound on the inter-event times despite the presence of packet losses. The proposed dynamic ETC strategy has several advantages with respect to the commonly studied static ETC strategy including significantly larger average inter-event times. The proposed design methodology results in tradeoffs between the maximum allowable number of successive packet dropouts, (minimum and average) inter-event times and L-p-gains, which will be illustrated by means of a numerical example.

关键词： Closed loop systems Packet loss Robustness Time-domain analysis Wireless communication Wireless sensor networks

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event-triggered attitude control for flying robots using an event approach based on the control 1

Event-triggered attitude control for flying robots using an ...

引用

proceedings first int conf event based control commu signal processing

作者： Guerrero-Castellanos, J. F. Marchand, N. Durand, S. Vega-Alonzo, A. Tellez-Guzman, J. J. Autonomous Univ Puebla BUAP Fac Elect Puebla Mexico Aix Marseille Univ ISM FR-13009 Marseille France CNRS Univ Grenoble ENSE3 GIPSA Lab Lab Control Syst DeptSySCo Team F-38402 St Martin Dheres France

ISBN: (纸本)9781467378888

This paper presents the development of a quaternion-based nonlinear event-triggered control for the attitude stabilization of Flying robots. firstly, it is proved the existence of a control Lyapunov Function. Unlike some previously proposed schemes, the aim of this paper is to propose a new and simpler event function. The control law ensures the asymptotic stability of the closed-loop system to the desired attitude. The approach is validated in real-time using a quadrotor mini-helicopter. The experiments show that the event driven controller reduces the control update without deteriorating the closed-loop system performance.

关键词： Attitude control control systems Lyapunov methods Nonlinear systems Quaternions Robot kinematics

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Model-based event-triggered control for freeway traffic systems 1

Model-based event-triggered control for freeway traffic syst...

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proceedings first int conf event based control commu signal processing

作者： Ferrara, Antonella Sacone, Simona Siri, Silvia Univ Pavia Dept Elect Comp & Biomed Engn I-27100 Pavia Italy Univ Genoa Dept Informat Bioengn Robot & Syst Engn Genoa Italy

ISBN: (纸本)9781467378888

In this paper a model-based event-triggered control scheme for freeway traffic systems is proposed. The freeway network is a spatially distributed system in which sensors and actuators act on portions of the overall system. Measurements and control actions can be transmitted among the plant and the controllers via a shared communication network. For this reason the freeway network can be controlled relying on a design framework typical of Networked control Systems. In the proposed control scheme the number of transmissions over the network is reduced by adopting local triggering conditions included in sensors, allowing transmissions from the sensors to the controller only when such conditions are verified. One of the novelties of this work stands in considering not only sensors able to measure the freeway traffic state but also sensors which measure the traffic demands, which can be regarded as disturbances affecting the system dynamics.

关键词： Atmospheric measurements Particle measurements Sensor systems Time measurement Traffic control Vehicles

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