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Adjusting stiffness of air spring and damping of oil damper using fuzzy controller for vehicle seat vibration isolation

Adjusting stiffness of air spring and damping of oil damper ...

引用

Siberian Conference on control and Communications (SIBCON)

作者： Senad Huseinbegovic Omer Tanovic Faculty of Electrical Engineering Department of Automatic Control and Electronics University of Sarajevo Sarajevo Bosnia and Herzegovina

In this paper we present one of the concepts of vehicle seat vibration damping, using a fuzzy controller. We used a fuzzy controller as a part of a semi-active vehicle suspension system, which consists of semi-active air spring and semi-active damper. system is implemented between the cabin floor and vehicle seat. Fuzzy controller is designed to adjust the stiffness of the air spring and damping of the oil damper, in order to isolate the vertical vibrations that are being caused by rough road surfaces. Input data for fuzzy controller are cabin floor acceleration, vehicle seat deflection and velocity of the vehicle seat deflection. Measure of the quality of suspension is the SEAT value, which is calculated as a quotient of effective seat vertical acceleration and effective cabin vertical acceleration (ISO 2631-1 standard).

关键词： Damping Springs Petroleum Shock absorbers Fuzzy control Vehicles Vibration control Acceleration Accelerometers ISO standards

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New fuzzy logic-based arithmetic and visual representations for systems' modelling and optimization

New fuzzy logic-based arithmetic and visual representations ...

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IEEE International Conference on Robotics and Biomimetics

作者： Walaa Ibrahim Mahmoud Gabr Hassen Taher Dorrah Automatic Control and Systems Engineering Group Department of Electric Power and Machines Engineering Faculty of Engineering Cairo University Giza Egypt

This paper is directed towards developing two new fuzzy logic-based representations for systems modelling and optimization using the notion of the normalized fuzzy matrices. The first is the arithmetic type based on dual cell representation, expressed by replacing each parameter with a pair of parentheses, the first is the actual value and the second is corresponding fuzzy level, (value, fuzzy level). The second is the visual type based on coloured cells representation expressed by replacing each parameter by its value and a coded (newly defined negative or positive colours based on the colour Hue circle) corresponding to its fuzzy level. For both cases, the theoretical foundations of the fuzzy logic algebra are presented for various cases of operations.

关键词： Fuzzy logic Fuzzy systems Arithmetic Power engineering and energy Fuzzy control Uncertainty Large-scale systems systems engineering and theory Power system modeling automatic control

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Development of Fuzzy Logic-based Arithmetic and Visual Representations for systems' modelling and optimization of interconnected networks

Development of Fuzzy Logic-based Arithmetic and Visual Repre...

引用

IEEE International Conference on Robotics and Biomimetics

The foundation of new Fuzzy Logic Level Arithmetic and Visual representations, normalized fuzzy matrices, and the principle of fuzzy logic-based level tracking were developed by Gabr and Dorrah for systems modelling and optimization during all stages of formulation and solution. This new concept has an unlimited scope of generalizations and extensions to many classes of problems and systems in various disciplines. In this paper, further development of the above concept to the modelling and multi-objective linear optimization of multi-stations operating interconnected network in a fully fuzzy environment is presented. The development approach is based on a fuzzy logic-based arithmetic or visual representation incorporated in spreadsheet form with built-in using macros normal Visual Basic Application (VBA) Language. The approach is capable of accommodating an unlimited number of parameters and variables with open scales of fuzzy levels. These fuzzy levels can then be transferred at the end of solution to actual uncertainties. The approach is applied to a Case Study of 8 (eight) interconnected electric operated pump stations irrigation network of El Nasr Region at West of Delta (Egypt). The results demonstrated strongly the applicability and efficacy of the developed techniques to handle medium and large scale interconnected networks operating in a fully fuzzy environment.

关键词： Fuzzy logic Fuzzy systems Arithmetic Power engineering and energy Fuzzy control Algebra Color Power system modeling Power system interconnection automatic control

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Combination of Lyapunov Functions and Density Functions for Stability of Rotational Motion

Combination of Lyapunov Functions and Density Functions for ...

引用

Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： J.F.Vasconcelos A.Rantzer C.Silvestre P.Oliveira the Institute for Systems and Robotics Instituto Superior Técnico the Department of Automatic Control Faculty of EngineeringLund University

Lyapunov methods and density functions provide dual characterizations of the solutions of a nonlinear dynamic system. This work exploits the idea of combining both techniques, to yield stability results that are valid for almost all the solutions of the system. Based on the combination of Lyapunov and density functions, analysis methods are proposed for the derivation of almost input-to-state stability, and of almost global stability in nonlinear systems. The techniques are illustrated for an inertial attitude observer, where angular velocity readings are corrupted by non-idealities.

关键词： ISS Lyapunov Combination of Lyapunov Functions and Density Functions for Stability of Rotational Motion

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Design of fuzzy logic control of permanent magnet DC motor under real constraints and disturbances

Design of fuzzy logic control of permanent magnet DC motor u...

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IEEE Conference on control Technology and Applications (CCTA)

作者： Jasmin Velagic Amar Galijasevic Department of Automatic Control and Electronics Faculty of Electrical Engineering Sarajevo Bosnia and Herzegovina Siemens Company Sarajevo Bosnia and Herzegovina

This paper presents a design of the fuzzy logic control for a permanent magnet DC motor. The main objective is to achieve a robust controller under disturbances and unmodeled dynamics acting, such as load torque, dead zone, measurement noise and nonlinearities. The whole system contains the DC motor, driver, tachogenerator, external load and microprocessor based system (dSPACE CLP1004). This system is considered such as black box. The fuzzy controller is designed in simulation mode first. The model of whole system was obtained through identification procedure. Then this fuzzy controller is included into a real physical control structure. control performance of the fuzzy controller in both simulation and experimental modes are compared under mentioned constraints. Also, results obtained by the fuzzy controller are compared with the same obtained by PID controller.

关键词： Fuzzy logic DC motors Fuzzy control Noise robustness Robust control Torque control control nonlinearities Nonlinear dynamical systems Torque measurement Noise measurement

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Access to process data with OPC-DA using IEC61499 Service Interface Function Blocks

Access to process data with OPC-DA using IEC61499 Service In...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： F. Perez D. Orive M. Marcos E. Estévez G. Morán I. Calvo Department Automatic Control and Systems UPV/EHU EISI of Bilbao Spain Electronic Division Faculty of Engineering Universidad Autónoma del Estado de Mexico Toluca Mexico

ISBN: (纸本)9781424427277

The need for flexibility in manufacturing systems is continuously growing. This need deals with the establishment of design methodologies for implementing distributed applications. The IEC61499 define a generic architecture for designing distributed applications, based on Functions Block (FB) networks. The interface between the control software and the hardware is achieved by means of the so called Service Interface FB. But guidelines to implement this type of FBs are provided neither by the standard nor by the available tools. On the other hand, one of the most widely used industrial communication standard is OPC that enables the exchange of data between multi-vendor devices and control applications without any proprietary restrictions. Thus, an easy integration of this communication standard within IEC61499 applications may contribute to consolidate such standard. This paper presents the guidelines to use OPC in industrial applications through the definition an implementation of SIFBs to access process data using OPC-DA (OPC Data Access) specification.

关键词： Communication standards Application software Communication system control Guidelines Manufacturing systems Design methodology Computer architecture Software tools Hardware Software standards

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Direct torque control of an IPM synchronous motor drive using model reference adaptive backstepping approach

Direct torque control of an IPM synchronous motor drive usin...

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IEEE International Conference on Robotics and Biomimetics

作者： Hai Lin Weisheng Yan Mingfeng Li Peng Wen Chunhui Zhang Mei Li Department of Mechanical Engineering and Automatic Control College of Marine Engineering Northwestern Polytechnical University Xi'an China Faculty of Mechanical Engineering and Automatic Control College of Marine Engineering Northwestern Polytechnical University Xi'an China First Natural Gas Plant ChangQing Oil-field Constituent Company Yinchuan China ChangQing oil field workers hospital ChangQing Oil-field Constituent Company Xi'an China

ISBN: (纸本)9781424447749

To enhance the performance of permanent magnet synchronous motor drive, a sensorless direct torque control (DTC) scheme based on adaptive backstepping control is proposed to control the torque and stator flux linkage, which use five-order permanent magnet synchronous motor (PMSM) dynamic model in the stationary frame with stator currents, rotor flux linkage and rotor speed. In the proposed scheme, the reference voltages were obtained by a designed model reference adaptive backstepping controller to drive PMSM. By combining the adaptive control, the system possesses the advantages of good transient performance and the robustness to the parametric uncertainties and load torque disturbance. Moreover, a adaptive flux linkage observer is designed to provide the simultaneous estimation of the rotor flux linkage and speed. The simulation results show that the designed controller can guarantee the globally asymptotically stability of system, and the system achieve excellent speed estimation and speed tracking performance.

关键词： Torque control Synchronous motors Programmable control Adaptive control Backstepping Couplings Permanent magnet motors Sensorless control Stators Rotors

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Droop based control of parallel-connected single-phase inverters in D-Q rotating frame

Droop based control of parallel-connected single-phase inver...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Saeed Golestan Mahmood Joorabian Hasan Rastegar Arman Roshan Josep M. Guerrero Faculty of Electrical Engineering Amirkabir University of Technology슠 Tehran Iran Shahid Chamran University Ahvaz Iran Center of Power Electronics Systems Virginia Polytechnic Institute and State University Blacksburg VA USA Department of Automatic Control Systems Computer Engineering Universitat Poliltècnica de Catalunya Barcelona Spain

ISBN: (纸本)9781424435067

In this paper, control of parallel single-phase inverters in direct-quadrature(DQ) rotating frame based on droop method is proposed. For each inverter, a secondary orthogonal imaginary circuit is created to provide the second phase required for the transformation; thus a DQ model of the inverter is obtained. The DQ transformation provides a time-invariant model of the inverter which makes the control design similar to that of dc-dc converters. The recognition of this analogy is important in that all of advanced dc-dc converters control techniques that have been previously developed can be applied to the control parallel inverters. The controller then is designed in DQ frame. Theoretically, infinite loop gain can be achieved in DQ rotating frame resulting in the elimination of the steady state error at the fundamental frequency of the inverter. The output impedance of the inverters is also considered, to ensure the decoupling between active and reactive power control using droop method. Simulation results are provided to prove the concept.

关键词： Inverters Communication system control Circuits DC-DC power converters Uninterruptible power systems Power system reliability control systems control design Frequency Reactive power control

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Modern approaches in power system control

Modern approaches in power system control

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IEEE International Conference on Automation, Quality and Testing, Robotics, AQTR

作者： S. St. Iliescu Ioana Fagarasan Automatic Control and Industrial Informatics Department Automatic Control and Computers Faculty University Politehnica of Bucharest Romania

The structure and coordination of the electrical power system (EPS) are presented in this paper with respect to three concepts: system theory, systems analysis and multi-agent techniques. The above mentioned concepts are discussed approaching the EPS behaviour and functioning based on actual problems regarding the globalisation of the energy production and transportation, integration of different renewable sources of energy with the conventional power systems and the safety aspects of connecting the distributed generation to the interconnected large system.

关键词： control systems Power systems Process control Power generation Artificial intelligence Medical services Multiagent systems

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Parity equations for fault detection and isolation

Parity equations for fault detection and isolation

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IEEE International Conference on Automation, Quality and Testing, Robotics, AQTR

作者： I. Fagarasan S.St. Iliescu Automatic Control and Industrial Informatics Department Automatic Control and Computers Faculty University Politehnica of Bucharest Romania

Sensors, actuators or physical components in engineering systems are often subjected to un-permitted or unexpected deviations from usual operating conditions. With a relatively small computing effort and with good results to unmeasured disturbances, the parity equations build for a specific process are proven to be very useful to provide fault detection residuals in order to identify the fault.

关键词： Mathematical model Equations Fault detection Sensors Generators Additives Temperature sensors

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