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IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (EIConRus)

作者： Imanova, Azaliya A. Tulegenov, Erlan M. Bespalov, Viktor Y. ANO CPE MOMENTUM Moscow Russia Natl Res Univ Moscow Power Engn Inst Moscow Russia

ISBN: (纸本)9781728103396

The article presents an assessment of the characteristics of the electric drive of the cold-pilgering mill, in which each phase of the stator motor windings is connected to an independent DC source. The evaluation was performed according to the criterion of maximum speed. A set of mathematical equations with lumped parameters of an electrical machine was adopted as a model, and a semiconductor converter was represented by an aperiodic link of the second order. A synchronous motor based on an asynchronous motor with a phase rotor was used as an electric machine. In an electric car, the stator windings of the motor were connected to a DC source. The rotor windings were connected to a frequency converter. It is shown that the speed of the control circuit of the electromagnetic torque in such a scheme does not exceed 130 rad/s. This speed is limited to the analog-to-digital converter through which the control signal from the output of the speed regulator is fed. To increase the system response speed, it is proposed to generate a control signal via a serial digital channel, for example, Ethernet. The rejection of the analog form of the control signal will significantly increase the accuracy of the electric drive system, while the expected cut-off frequency in the control circuit of the torque can reach 700-800 rad/s.

关键词： control algorithms finite element analysis electric machine with switching of magnetic flux limiting modes

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Rotating stall control of an axial flow compressor using pulsed air injection

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JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME 1997年第4期119卷 742-752页

作者： DAndrea, R Behnken, RL Murray, RM WL MNAG EGLIN AFB FL 32542 USA CALTECH DIV ENGN & APPL SCI PASADENA CA 91125 USA

This paper presents the use of pulsed air injection to control rotating stall in a low-speed, axial flow compressor. In the first part of the paper the injection of air is modeled as an unsteady shift of the compressor characteristic, and incorporated into a low dimensional model of the compressor. By observing the change in the bifurcation behavior of this model subject to nonlinear feedback, the viability of various air injection orientations is established. An orientation consistent with this analysis is then used for feedback control. By measuring the unsteady pressures near the rotor face, a control algorithm determines the magnitude and phase of the first mode of rotating stall and controls the injection of air in the front of the rotor face. Experimental results show that this technique eliminates the hysteresis loop normally associated with rotating stall. A parametric study is used to determine the optimal control parameters for suppression of stall. The resulting control strategy is also shown to suppress surge when a plenum is present. Using a high-fidelity model, the main features of the experimental results are duplicated via simulations.

关键词： Axial flow Engineering simulation Rotors Simulation control algorithms Compressors Bifurcation Optimal control Surges Feedback

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Switching algorithms for Single Phase Matrix Converter with Input Capacitance 20

Switching Algorithms for Single Phase Matrix Converter with ...

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International Conference on Applied Electronics (AE)

作者： Pittermann, Martin Drabek, Pavel Bednar, Bedrich Univ W Bohemia Dept Electromech & Power Elect Plzen Czech Republic

ISBN: (纸本)9788026103868

This paper describes the switching algorithms for single phase matrix converter (switching logic for matrix converter). There is shown two basic methods of the control of the switches in the matrix converter and these modifications (and combining algorithm). First method needs the knowledge of the polarity of the output current of the converter and the second method needs the knowledge of the polarity of the input voltage.

关键词： Single phase matrix converter control algorithms Commutation in power electronic

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ADMSV - A Differential Machine Learning based Steering controller for Smart Vehicles

ADMSV - A Differential Machine Learning based Steering Contr...

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IEEE World AI IoT Congress (AIIoT)

作者： Abegaz, Brook W. Loyola Univ Dept Engn Chicago IL 60611 USA

ISBN: (纸本)9781665484534

Electric power-assisted steering (EPAS) is a mechanism of using electric power to enhance the efficiency, performance, and reliability of steering operations in vehicles. In the modern-day fully-autonomous and semi-autonomous vehicles, the real-time operation of EPAS systems has challenges related to the unmodeled dynamics, irregularity of the system operation, and variable road conditions. In this paper, a machine learning-based control system (ADMSV) that incorporates motion-related inputs such as direction, velocity, and torque has been developed to optimize and improve the overall efficiency of electric power-assisted steering in intelligent vehicles. The proposed system is used to calculate numerous external inputs and generate steering-related outputs (angular velocity, angular difference, output torque) which could help supply the adequate amount of torque that helps the vehicle to maneuver the wheels more easily or comfortably depending on various road and driving conditions.

关键词： Electrical power-assisted steering (EPAS) Torque Position Velocity Machine-learning control algorithms

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INVESTIGATION OF MODEL CONFIGURATION PARAMETERS FOR STICK-SLIP MODELING 40

INVESTIGATION OF MODEL CONFIGURATION PARAMETERS FOR STICK-SL...

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40th ASME International Conference on Ocean, Offshore and Arctic Engineering (OMAE)

作者： Wiktorski, Ekaterina Sui, Dan AkerBP Stavanger Norway Univ Stavanger Stavanger Norway

ISBN: (纸本)9780791885208

Stick-slip vibrations modeling is an important topic within drillstring dynamics. Thus, a number of mathematical models has been suggested to describe behavior of drillstrings under torsional . Most of the models take similar approach with regard to, for instance, drillstring discretization, definition of external forces and velocity-weakening effect. Commonly, research papers focus on the models' core - mathematical expressions that describe stick-slip oscillations and inherent to it negative damping. The results are usually presented in terms of downhole rotational velocity or displacement and reaction forces at various surface rotational velocities and applied external forces. However, little attention is paid to discussion and justification of selected model configuration, which includes definition of the following 1) total simulation time, time step, number of masses/elements, etc., 2) initial conditions and boundary conditions, and 3) numerical solver to obtain solution in time. This paper reviews commonly used configurations for stick-slip vibrations modeling and discusses selection criteria provided in the references. It also presents case studies to evaluate effect of the above-mentioned configuration properties on simulations outcome. A simple in-house IDOF torsional dynamics model was used for that purpose, where one explicit and one implicit numerical solvers were applied to obtain solution in time. Three case studies are presented, which compare performance of two numerical solvers with respect to convergence and stability. The results from the case studies show, for example, that applied explicit numerical solver (Central Difference Method) introduces numerical damping, while implicit solver (Newton-Raphson Method) does not. Central Difference Method provides convergence when initial force is applied, while damping function has to be defined in case of Newmark-Raphson method to obtain convergence. Stability of the explicit numerical solver is determine

关键词： Modeling Stick-slip Drill strings Damping Simulation Performance Vibration Dynamics (Mechanics) Stability Drilling System dynamics Boundary-value problems Calibration Displacement Newton's method Oscillations control algorithms

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Formation of Work Plans and Schedules at Enterprises with Conveyor Assembly

Formation of Work Plans and Schedules at Enterprises with Co...

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International-Federation-of-Information-Processing-Working-Group-5.7 (IFIP WG 5.7) International Conference on Advances in Production Management Systems (APMS)

作者： Khobotov, E. N. Ermolova, M. A. Russian Acad Sci Trapeznikov Inst Control Sci Moscow Russia Bauman Moscow State Tech Univ Moscow Russia

ISBN: (纸本)9783030858742;9783030858735

The methods of constructing plans and schedules for the production of components and assembly of manufactured products from them on the conveyors of machine-building enterprises are considered. Work planning can be carried out both in the production of incoming orders for manufactured products, and in the production of products taking into account the current demand for it.

关键词： Modeling methods Planning Equipment Components Conveyor assembly control algorithms Schedule theory

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SHOCKLESS EXPLOSION COMBUSTION - EXPERIMENTAL INVESTIGATION OF A NEW APPROXIMATE CONSTANT VOLUME COMBUSTION PROCESS

SHOCKLESS EXPLOSION COMBUSTION - EXPERIMENTAL INVESTIGATION ...

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ASME Turbo Expo: Turbine Technical Conference and Exposition

作者： Reicher, Thoralf G. Bobusch, Bernhard C. Paschereit, Christian Oliver Schaepel, Jan-Simon King, Rudibert Klein, Rupert Tech Univ Berlin Hermann Fottinger Inst Chair Fluid Dynam Berlin Germany Tech Univ Berlin Chair Measurement & Control Berlin Germany Free Univ Berlin Geophys Fluid Dynam Dept Math Berlin Germany

ISBN: (纸本)9780791849767

Approximate constant volume combustion (aCVC) is a promising way to achieve a step change in the efficiency of gas turbines. This work investigates a recently proposed approach to implement aCVC in a gas turbine combustion system: shock less explosion combustion (SEC). The new concept overcomes several disadvantages such as sharp pressure transitions, entropy generation due to shock waves, and exergy losses due to kinetic energy which are associated with other aCVC approaches like, e.g., pulsed detonation combustion. The combustion is controlled via the the fuel/air mixture distribution which is adjusted such that the entire fuel/air volume undergoes a spatially quasi homogeneous autoignition. Accordingly, no shock waves occur and the losses associated with a detonation wave are not present in the proposed system. Instead, a smooth pressure rise is created due to the heat release of the homogeneous combustion. An atmospheric combustion test rig is designed to investigate the autoignition behavior of relevant fuels under intermittent operation, currently up to a frequency of 2 Hz. Application of OH*- and dynamic pressure sensors allows for a spatially and time-resolved detection of ignition delay times and locations. Dimethyl ether (DME) is used as fuel since it exhibits reliable autoignition already at 920K mixture temperature and ambient pressure. First, a model-based control algorithm is used to demonstrate that the fuel valve can produce arbitrary fuel profiles in the combustion tube. Next, the control algorithm is used to achieve the desired fuel stratification, resulting in a significant reduction in spatial variance of the auto-ignition delay times. This proves that the control approach is a useful tool for increasing the homogeneity of the autoignition.

关键词： Fuels Pressure sensors Kinetic energy Gas turbines Delays Shock waves Waves Ethers (Class of compounds) Temperature Entropy Combustion systems Pressure Ignition delay Heat Valves control algorithms Explosions Combustion Ignition Exergy

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Ensuring the Security of the Operation of Complex Systems: New Models and algorithms 20th

Ensuring the Security of the Operation of Complex Systems: N...

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20th IFAC Conference on Technology, Culture, and International Stability (TECIS)

作者： Kononov, Dmitry Furugyan, Meran Russian State Univ Humanities Inst Control Sci Russian Acad Sci Moscow Russia Russian Acad Sci Fed Res Ctr Comp Sci & Control Moscow Russia

The relevance of the development and application of real-time systems as essential elements of ensuring the safety of complex systems is considered. The functions of its main blocks are highlighted: the network model generator, the schedule generator, and the control optimization block. Formulations of problems of existence and the construction of a valid schedule with interruptions are proposed. Unlike traditional statements, the case is considered when the graph of connections between processors is not complete and can vary over time. It also takes into account the time required to process interrupts and switches during the execution of works. A multi -product network model was built, and the necessary and sufficient conditions for the solution of the problem were indicated. New algorithms have been developed for effective planning and control of work performance, used in the design of real-time systems. An algorithm of optimal arrangement of control modules is proposed. Estimates of the complexity and accuracy of the developed algorithms are obtained. The scope of application of the developed algorithms is supposed. Copyright (C) 2021 The Authors.

关键词： Complex system ensuring the safety of operation multiprocessor real-time system valid schedule network model directive interval control module work planning control algorithms

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Identification of inertial model for oscillating system 19

Identification of inertial model for oscillating system

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19th International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Kurek, J. Warsaw Univ Technol Inst Automat Control & Robot Warsaw Poland

ISBN: (纸本)9781479950812

There is presented a method for calculation of inertial model for an open-loop oscillating system based on the system step response. Presented method is simple and can be easily used in automatic control practice. Identified model can be applied in control algorithms more advanced than the PID controller, for instance in the predictive control.

关键词： nonlinear control systems open loop systems predictive control three-term control PID controller automatic control practice control algorithms inertial model identification open-loop oscillating system proportional-integral-derivative controller system step response Approximation methods Educational institutions Prediction algorithms Predictive control Predictive models Robots Transfer functions Predictive control Proportional Integral Derivative control Open loop systems Three term control systems Computer algorithms Prediction algorithms oscillatory system Nonlinear control systems Approximation method Educational institutions TRANSFER FUNCTIONS Prediction models Robot

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Simulation environment for development of quad-copter controls incorporating physical environment in urban setting 23

Simulation environment for development of quad-copter contro...

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Conference on Unmanned Systems Technology XXIII

作者： Lederman, Carl Kirk, Kelly T. Perry, Vincent Kraczek, Brent DEVCOM Army Res Lab Attn FCDD RLC HC 328 Hopkins Rd Aberdeen Proving Ground MD 21005 USA Parsons Corp Pasadena CA 91124 USA DEVCOM Army Res Lab Attn FCDD RLC S 328 Hopkins Rd Aberdeen Proving Ground MD 21005 USA

ISBN: (数字)9781510643543

ISBN: (纸本)9781510643543

The intersection between control algorithms and the environment pose multiple issues regarding safe and reliable operations of remote-controlled and autonomous quadcopters for commercial and defense applications. This is particularly true in urban environments, which can pose significant problems to navigation and safety. We are developing a new platform for the development and testing of control schemes for quad-copters in urban environments, with emphasis on the intersection of drone and environmental physics, the uncertainty inherent in each, and control algorithms employed. As our basis, we are using Unreal Engine, which provides flexibility for physics and controls used, in addition to state-of-the-art visualization, environmental interactions (e.g. collision simulation) and user interface tools. We incorporate the open-source, open-architecture PixHawk PX4 software platform, with the object of transitioning control algorithms to hardware in the future. Finally, we convert models of actual cities from MapBox and OpenStreetMap for use in Unreal Engine. We conclude with a demonstration of human-controlled drone flight in a section of Chicago, IL with light, uni-directional winds.

关键词： Simulation environment control algorithms

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