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检索条件"主题词=Control Algorithms"

共 697 条记录，以下是231-240 订阅

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Optimization of control system for modified configuration of a refrigeration unit 23rd

Optimization of control system for modified configuration of...

引用

23rd KES International Conference on Knowledge-Based and Intelligent Information and Engineering Systems (KES)

作者： Lokietek, Tomasz Jaszczak, Slawomir Nikonczuk, Piotr West Pomeranian Univ Technol Szczecin Fac Maritime Technol & Transport Al Piastow 41 PL-71065 Szczecin Poland West Pomeranian Univ Technol Szczecin Fac Comp Sci & Informat Technol Zolnierska 49 PL-71210 Szczecin Poland

The paper presents an optimization of temperature control system for the refrigeration unit. Basic technological limits, which have influence on a control quality are also described. From a technological point of view the considered refrigeration unit operates in two modes. It allows the temperature stabilization inside the chamber despite the layer of frost growing up on the surface of evaporator. It is the main reason of changes dynamic parameters of the refrigeration unit. Authors analysed other technological factors, which may disturb a temperature inside of the cold chamber. The main idea was to find robust control algorithms for the temperature control, which makes a process stable in any working point. At the final part of paper the selected real time experiments were presented. It shows typical working modes of the refrigeration unit and proof robustness of developed and implemented control algorithm. (C) 2019 The Authors. Published by Elsevier B.V.

关键词： refrigeration unit control algorithms temperature control

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Model Based control for a Selective Catalytic Reduction (SCR) System in an Exhaust Gas Aftertreatment System for a Diesel Engine

Model Based Control for a Selective Catalytic Reduction (SCR...

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International Conference on Energy Efficient Technologies for Sustainability (ICEETS)

作者： Rasheed, Waseem A. Goyal, Parul Joseph, Cyril Manipal Inst Technol Dept Instrumentat & Control Manipal Karnataka India

ISBN: (纸本)9781467361507;9781467361491

The application of Selective Catalytic Reduction (SCR) in Automobiles makes the system complex, while trying to meet the stringent Emission norms, especially in mobile heavy-duty diesel applications. As EURO VI emission standards are on the line, these strict specifications and the dynamic behavior of automobiles demands advanced control system design. Such a control system design requires a model based control approach. In this paper, we incorporates a model-based Feed-Forward controller (FFC) which handles the known dynamics of the plant along with a Feed-Back controller (FBC) to mitigate the effects caused by disturbances and slowly varying parameters.

关键词： Diesel Engine Exhaust Gas After-treatment system Selective Catalytic Reduction System Modeling control algorithms

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Furthering the Study of Real-Time Life Extending control for Ocean Energy Conversion

Furthering the Study of Real-Time Life Extending Control for...

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General Meeting of the IEEE-Power-and-Energy-Society

作者： Stillinger, Chad J. Brekken, Ted K. A. von Jouanne, Annette

ISBN: (纸本)9781467327299

Renewable energy is a topic of significant interest and importance in the world today. Ocean wave energy, particularly on the western coasts of land masses, has considerable potential as a renewable resource. However, to rightly evaluate the overall cost of energy for wave energy converters, survivability and maintenance issues must be addressed. This study endeavors to develop tools for real-time damage quantification for use with life extending control algorithms, and shows that energetic sea conditions may cause much greater damage than the associated benefits in power production. Therefore, control strategies that consider a tradeoff between damage and power production will be necessary in implementing cost effective wave energy converter operation.

关键词： Wave Energy Converter Life Extending control Ocean Energy control algorithms

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Observers and Predictors for Wireless Time-Sensitive control Loops 16

Observers and Predictors for Wireless Time-Sensitive Control...

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16th IEEE International Conference on Factory Communication Systems (WFCS)

作者： Osuna Ibarra, Linda Patricia Gomez Gutierrez, David Cavalcanti, Dave Caballero Barragan, Humberto Intel Guadalajara Jalisco Mexico Intel Hillsboro OR USA

ISBN: (纸本)9781728152974

The present work deals with diminishing the effects of wireless communication latency in time-sensitive networks. It takes advantage of modern approaches that offer bounded latency and it focuses on methods to cope with the non-deterministic delays introduced by communication latency. An observer-predictor scheme module is designed and added in the control loop to prevent the performance degradation when a wireless network is introduced. The goal is to allow the use of same controllers used in wired networks. This module may exploit information provided by the wireless communication devices, such as expected latency, timestamp, and time synchronization along the network. The proposed module allows the controller to have a performance similar as when in a wired network. This enables wireless networked control in systems with low time constants (i.e. time-sensitive). Lab experiments are presented in real-time to illustrate the observer-predictor scheme module proposed. Finally, the conclusions and future work are presented.

关键词： industrial control wireless time sensitive networking (WTSN) control algorithms wireless control loops

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Application of a virtual inerter in active vibration control using inertial actuators

Application of a virtual inerter in active vibration control...

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Conference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems

作者： Debattisti, N. Bacci, M. L. Cinquemani, S. Politecn Milan Dipartimento Meccan Via La Masa 1 I-20156 Milan Italy

ISBN: (数字)9781510635364

ISBN: (纸本)9781510635364

In this paper the application of an inerter to a control system based on inertial actuators is investigated. Since the dynamics of this kind of actuators affects the stability of the controlled system, the application of the inerter aims to limit instability problems by shifting down the resonance frequency of the actuator. The interaction of this passive element with the other vibration modes of the structure under control is not negligible. The inerter should be physically placed in parallel with the elastic suspension of the actuator and the transducer;in this paper, the inerter behavior is simulated by the inertial actuator through an acceleration feedback. First, the study is carried out on a two degrees-of-freedom model and stability considerations are made;then, the approach is implemented on the Finite Element model of a clamped-clamped beam which is also used as experimental test rig. Finally, the proposed solution is validated with experimental results.

关键词： Vibration control Inertial actuators control algorithms Automation

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MODEL-BASED COMBUSTION DURATION AND IGNITION TIMING PREDICTION FOR COMBUSTION PHASING control OF A SPARK-IGNITION ENGINE USING IN-CYLINDER PRESSURE SENSORS

MODEL-BASED COMBUSTION DURATION AND IGNITION TIMING PREDICTI...

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American-Society-of-Mechanical-Engineers(ASME) International Design Engineering Technical Conferences / 39th American-Society-of-Mechanical-Engineers(ASME) Computers and Information in Engineering Conference (IDETC-CIE)

作者： Wang, Xin Khameneian, Amir Dice, Paul Chen, Bo Shahbakhti, Mandi Naber, Jeffrey D. Archer, Chad Qu, Qiuping Glugla, Chris Huberts, Garlan Michigan Technol Univ Dept Mech Engn Engn Mech Houghton MI 49931 USA Ford Motor Co Dearborn MI 48121 USA

ISBN: (纸本)9780791859292

Combustion phasing, which can be defined as the crank angle of fifty percent mass fraction burned (CA50), is one of the most important parameters affecting engine efficiency, torque output, and emissions. In homogeneous spark-ignition (SI) engines, ignition timing control algorithms are typically mapbased with several multipliers, which requires significant calibration efforts. This work presents a framework of modelbased ignition timing prediction using a computationally efficient control-oriented combustion model for the purpose of real-time combustion phasing control. Burn duration from ignition timing to CA50 (A0IGN-cAso) on an individual cylinder cycle-by-cycle basis is predicted by the combustion model developed in this work. The model is based on the physics of turbulent flame propagation in SI engines and contains the most important control parameters, including ignition timing, variable valve timing, air-fuel ratio, and engine load mostly affected by combination of the throttle opening position and the previous three parameters. With 64 test points used for model calibration, the developed combustion model is shown to cover wide engine operating conditions, thereby significantly reducing the calibration effort. A Root Mean Square Error (RMSE) of 1.7 Crank Angle Degrees (CAD) and correlation coefficient (R2) of 0.95 illustrates the accuracy of the calibrated model. On -road vehicle testing data is used to evaluate the performance of the developed model-based burn duration and ignition timing algorithm. When comparing the model predicted burn duration and ignition timing with experimental data, 83% of the prediction error falls within 3 CAD.

关键词： Combustion Pressure sensors Cylinders Ignition Spark-ignition engine Engines Calibration Cycles Errors Computer-aided design Testing Valves Vehicles Flames Stress algorithms Fuels Turbulence Physics Torque Emissions control algorithms Roads

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Gliding Robotic Fish: control and Exploration Under Localization Uncertainties

Gliding Robotic Fish: Control and Exploration Under Localiza...

引用

作者： Coleman, Demetris Michigan State University

学位级别：Ph.D., Doctor of Philosophy

Autonomous underwater vehicles have a variety of applications such as environmental monitoring, search and rescue, ocean exploration, and fish tracking. One such class of these vehicles is gliding robotic fish, which realizes energy-efficient locomotion and high maneuverability by combining buoyancy-driven gliding and fin-actuated swimming. The goal of this dissertation is to endow gliding robotic fish with advanced control capability and autonomy, to facilitate their ultimate applications in aquatic ***, an overview of the gliding robotic fish platform GRACE is presented and design improvements for the third generation of GRACE are discussed. These include adding Iridium satellite-based communication for remote operation, making the robot more robust for ocean operation, and developing a miniaturized version (Miniglider) to enable rapid testing of functionality and control ***, a backstepping-based trajectory tracking controller for the energy-efficient gliding-like motion of gliding robotic fish is proposed. The controller is designed to track the desired pitch angle and reference position in 3D space. In particular, under-actuation is addressed by exploiting the coupled dynamics and introducing a modified error term that combines pitch and horizontal position tracking errors. Two-time-scale analysis of singularly perturbed systems is used to establish the convergence of all tracking errors to a neighborhood around zero. The effectiveness of the proposed control scheme is demonstrated via simulation and experimental ***, incorporating observability into control schemes is discussed. Incorporating observability can enhance an observer’s ability to recover accurate estimates of unmeasured states, minimize estimation error, and ultimately, allow the original control objective to be achieved. The use of control barrier functions (CBFs) is proposed to enforce observability and thereby encourage convergence of state estimates to the

关键词： control algorithms Gliding robotic fish Nonlinear control Observability

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Training Systems for control of Mobile Manipulator Robots in Augmented Reality 15

Training Systems for Control of Mobile Manipulator Robots in...

引用

15th Iberian Conference on Information Systems and Technologies (CISTI)

作者： Herrera, Karen A. Rocha, Jessica A. Silva, Franklin M. Andaluz, Victor H. Univ Fuerzas Armadas ESPE Sangolqui Ecuador

ISBN: (纸本)9789895465903

In this article, an augmented reality application interface was developed, using a technological tool oriented towards teaching-learning that allows a mobile manipulator robot training system to be created. Focusing on the simulation of autonomous control algorithms and the implementation of animations made in the Unity 3D software, which will allow the user to interact with the real world through a mobile device where the rear camera will used to capture the image and the touch screen for visualization. It is verified that the application is intuitive and understandable for the user to operate, in order to provide the necessary knowledge of the operation and structure of the robot.

关键词： Augmented reality control algorithms Unity 3D animations

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A method to overcome wireless communication limits in decentralized active control applications

A method to overcome wireless communication limits in decent...

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Conference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems

作者： Debattisti, N. Bacci, M. L. Cinquemani, S. Politecn Milan Dipartimento Meccan Via La Masa 1 I-20156 Milan Italy

ISBN: (数字)9781510635364

ISBN: (纸本)9781510635364

In this work the use of many stand-alone devices is considered for active vibration control. A stand-alone device represents a control unit which is able to independently perform the vibration control task, since it is embedded with sensors, an inertial actuator and a microcontroller, in which the control algorithm is implemented. The developed active controller is also embedded with a wireless module, in order to share information with other devices within the network. The proposed solution aims to improve the performance a decentralized control architecture and it is based on the optimal control theory. The Linear Quadratic Regulator works with the full-state of the system, which is provided through a state estimation. A state recovery algorithm is then adopted to improve the quality of the estimation without placing a hefty burden on the wireless channel. Numerical analysis is made in order to study the advantages of this method. Finally, the proposed solution is validated with experimental results from a clamped-clamped beam.

关键词： Vibration control Inertial actuators control algorithms Wireless sensors Automation

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A prototype for on-line monitoring and control of energy performance for renewable energy buildings

A prototype for on-line monitoring and control of energy per...

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5th International Conference on Informatics in control, Automation and Robotics

作者： Paris, Benjamin Eynard, Julien Francois, Gregory Talbert, Thierry Polit, Monique Univ Perpignan Lab ELIAUS F-66860 Perpignan France

ISBN: (纸本)9789898111326

In this article, ways for improving the energetic performance of buildings are investigated. A state of the art leads to the introduction of a performance indicator expressed in kWh/m(2)/yr. To improve the value of this indicator, a processor-based prototype of a real-time data-acquisition and monitoring system is developed in collaboration with two industrial companies. The set of measurements and corresponding sensors that are necessary to compute the value of the indicator while being consistent with the natural segmentation of energy consumption, is listed, thanks to the representation of the building using a systemic approach. control algorithms are tested in simulation to improve renewable energy consumption while reducing fossil energy dependence, which are deemed to be applicable in practice using the proposed electronics. Simulations concerning the control and optimization of the power applied to two warmers in a room show large potential for fossil energy consumption reduction.

关键词： renewable energies energy performance indicators monitoring system smart transducers control algorithms predictive control optimal control high efficiency buildings

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