Publications
103 results found
Meisel J, Shabbir W, Evangelou SA, 2015, Control of PHEV and HEV Parallel Powertrains Using a Sequential Linearization Algorithm
Using measurable physical input variables, an implementable control algorithm for parallel architecture plug-in and non-plug-in hybrid electric vehicle (PHEV and HEV) powertrains is presented. The control of the electric drive is based on an algebraic mapping of the accelerator pedal position, the battery state-of-charge (SOC), and the vehicle velocity into a motor controller input torque command. This mapping is developed using a sequential linearization control (SLC) methodology. The internal combustion engine (ICE) control uses a modified accelerator pedal to throttle plate angle using an adjustable gain parameter that, in turn, determines the sustained battery SOC. Searches over an admissible control space or the use of pre-defined look-up tables are thus avoided. Actual on-road results for a Ford Explorer with a through-the-road (TTR) hybrid powertrain using this control methodology are presented. In addition, Matlab-based simulation results for PHEVs and HEVs using this single control algorithm are presented employing a model of the Explorer. These results show the gasoline consumption and SOC over 48 repeated cycles of three common driving schedules. Further studies of acceleration performance illustrate the trade-off of minimizing gasoline consumption vs. higher performance using more gasoline. All-electric range (AER) vs. battery capacity is also presented as well as the fuel consumption and final SOC for two PHEV control strategies.
Das HB, Evangelou SA, Jabez Dhinagar S, 2015, An Objective Evaluation of Characterisation Matrix for Two Wheeler Powertrain with Control Oriented Mathematical Model, SAE 2015 World Congress & Exhibition, Publisher: SAE International
The objective of this paper is to estimate characteristics parameters of two wheeler powertrain with simulated vehicle model. The evaluation is applied to define required characteristics for future motor integrated powertrain. The main parameters for the characteristics matrix are Fuel consumption and NOx gas emission. In the 1st phase of work, a mathematical model for the complete powertrain is developed using suitable modelling approach for different sub-modules of the complete system. The objectives of the model are, to simulate dynamic power-flow from the engine to wheel and to simulate NOx gas emission. The powertrain model consists of a carburetted spark ignition (S.I) engine and gear transmission system. The S.I engine model is capable of simulating dynamic torque output of engine as well as the NOx gas emission. The model is experimentally compared with available test data of production ready engine from TVS Motor Company, India. The dynamic effects of change of ignition timing and fueling on torque output and NOx gas emissions are simulated based on this model and discussed on the paper. The paper adapted two types of transmission model, one with Continuous Variable Transmission (CVT) and other one with Fixed Geared Transmission. The mathematical model for the CVT system is developed to capture automatic gear shift actuation and power transfer to the wheel. The model simulates the toque control system of the driven pulley as well as speed control system of the drive pulley. The mathematical model for the fixed gear ratio system with wet clutch system is proposed to simulate the manual gear based powertrain. The above mentioned model demands computationally intensive resources due to presence of higher order dynamics, mathematical discontinuity and non-linear functions. So this model is not suitable for control design application. In 2nd phase of work, the model is converted to lower complexity control oriented model by using feed-forward approach. The contr
Arana C, Evangelou SA, Dini D, 2015, Series Active Variable Geometry Suspension for Road Vehicles, IEEE-ASME TRANSACTIONS ON MECHATRONICS, Vol: 20, Pages: 361-372, ISSN: 1083-4435
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- Citations: 34
Shabbir W, Evangelou SA, 2014, Real-time control strategy to maximize hybrid electric vehicle powertrain efficiency, Applied Energy, Vol: 135, Pages: 512-522, ISSN: 0306-2619
The proposed supervisory control system (SCS) uses a control map to maximize the powertrain efficiency of a hybrid electric vehicle (HEV) in real-time. The paper presents the methodology and structure of the control, including a novel, comprehensive and unified expression for the overall powertrain efficiency that considers the engine-generator set and the battery in depth as well as the power electronics. A control map is then produced with instructions for the optimal power share between the engine branch and battery branch of the vehicle such that the powertrain efficiency is maximized. This map is computed off-line and can thereafter be operated in real-time at very low computational cost. A charge sustaining factor is also developed and introduced to ensure the SCS operates the vehicle within desired SOC bounds. This SCS is then tested and benchmarked against two conventional control strategies in a high-fidelity vehicle model, representing a series HEV. Extensive simulation results are presented for repeated cycles of a diverse range of standard driving cycles, showing significant improvements in fuel economy (up to 20%) and less aggressive use of the battery.
Evangelou SA, Tomas-Rodriguez M, 2014, Motorcycle Dynamic Modes and Passive Steering Compensation, Modelling, Simulation and Control of Two-Wheeled Vehicles, Pages: 221-241, ISBN: 9781119950189
This chapter introduces the main characteristics of motorcycle oscillatory modes and then discusses how their damping can be increased by employing steering compensation. Weave mode is a fishtailing-type motion involving yaw and roll of the motorcycle body and steering system oscillations. Wobble mode is a steering oscillation that is reminiscent of the supermarket cart front-wheel caster shimmy. The chapter describes a high-fidelity motorcycle model that is used to illustrate quantitatively the characteristics of the oscillatory modes and the influence of steering damping on machine stability. A mathematical model is used to analyse and illustrate the behaviour of motorcycles. This model takes into account the aerodynamic forces and moments, which are proportional to the square of the speed. The chapter explains a design methodology for steering compensation that improves modal damping. Finally, it provides an analysis of burst oscillations followed by a design of steering compensation to suppress these oscillations.
Thommyppillai M, Evangelou S, Sharp RS, 2014, Towards a practical virtual racing-car driver, Pages: 4943-4948
Fundamental approaches to modelling the control of a car by a driver are reviewed briefly. The context of the work presented is explained. Then, previous research on the application of optimal linear preview control to aspects of driving road vehicles is extended. This prior research treated the tracking of a roadway by a vehicle and driver at constant forward speed and the tracking of a speed demand while running straight. The two previously separate problems are combined, so that longitudinal and lateral path demands are considered in parallel. A new feature is that low-pass filters are included in the driver modelling, to represent driver bandwidth limitations. This feature enables the finding of the influence of the driver's control bandwidth on the optimal strategies. A new optimal preview control toolbox is employed for the computations. A simulation of the virtual driver-controlled car is shown to demonstrate the closed-loop system following longitudinal and lateral position demands.
Arana C, Evangelou SA, Dini D, 2014, Car attitude control by series mechatronic suspension, 19th World Congress of the International-Federation-of-Automatic-Control (IFAC), Publisher: ELSEVIER SCIENCE BV, Pages: 10688-10693, ISSN: 2405-8963
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- Citations: 1
Shabbir W, Evangelou SA, 2014, Efficiency analysis of a continuously variable transmission with linear control for a series hybrid electric vehicle, 19th World Congress of the International-Federation-of-Automatic-Control (IFAC), Publisher: ELSEVIER SCIENCE BV, Pages: 6264-6269, ISSN: 2405-8963
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- Citations: 1
Meisel J, Shabbir W, Evangelou SA, 2013, Evaluation of the through-the-road architecture for plug-in hybrid electric vehicle powertrains, 2013 IEEE International Electric Vehicle Conference, IEVC 2013
This paper investigates the through-the-road (TTR) powertrain architecture and its suitability for plug-in hybrid-electric vehicles (PHEVs) in the passenger vehicle category. The advantages and disadvantages of this architecture with respect to cost, sizing, control and manufacturability are contrasted against those of conventional architectures. The comparison extends into powertrain configurations used in recent commercial vehicles, such as the Toyota Prius and the Chevrolet Volt. The research includes the characterization of the mechanical dynamics and constraint equations of each architecture to quantify the control requirements. It is found that the TTR architecture excels in terms of manufacturability, and its ability to blend the motor and engine torques independently. © 2013 IEEE.
Meisel J, Shabbir W, Evangelou SA, 2013, A Practical Control Methodology for Parallel Plug-In Hybrid Electric Vehicle Powertrains, The 9th IEEE Vehicle Power and Propulsion Conference (VPPC)
Evangelou SA, Arana C, Shabbir W, et al., 2013, Method and Apparatus for Power Source Control
Lot R, Evangelou SA, 2013, Lap Time Optimization of a Sports Series Hybrid Electric Vehicle, World Congress on Engineering 2013; WCE2013
Evangelou SA, Limebeer DJN, Tomas-Rodriguez M, 2013, Suppression of Burst Oscillations in Racing Motorcycles, JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME, Vol: 80, ISSN: 0021-8936
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- Citations: 7
Lot R, Evangelou SA, 2013, Green Driving Optimization of a Series Hybrid Electric Vehicle, 2013 IEEE 52ND ANNUAL CONFERENCE ON DECISION AND CONTROL (CDC), Pages: 2200-2207, ISSN: 0743-1546
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- Citations: 13
Evangelou SA, Limebeer DJN, Tomas-Rodriguez M, 2013, Suppression of Burst Oscillations in Racing Motorcycles, JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME, Vol: 80
Shabbir W, Evangelou SA, 2012, Efficiency Maximizing and Charge Sustaining Supervisory Control for Series Hybrid Electric Vehicles, 51st Conference on Decision and Control; CDC2012
Arana C, Evangelou SA, Dini D, 2012, Pitch Angle Reduction for Cars under Ac- celeration and Braking by Active Variable Geometry Suspension, 51st Conference on Decision and Control; CDC2012
Moreno C, Tomas-Rodriguez M, Evangelou SA, 2012, Dynamical Analysis of a Duolever Suspension System, UKACC
Shabbir W, Evangelou SA, Arana C, 2012, Series hybrid electric vehicle supervisory control based on off-line efficiency optimization, 2012 IEEE International Electric Vehicle Conference
Evangelou SA, Dini D, De Meerschman O, et al., 2012, Variable-geometry suspension apparatus and vehicle comprising such apparatus
Evangelou SA, Shukla A, 2012, Advances in the modelling and control of series hybrid electric vehicles, American Control Conference (ACC), Publisher: IEEE COMPUTER SOC, Pages: 527-534, ISSN: 0743-1619
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- Citations: 13
Evangelou SA, Limebeer DJN, Tomas-Rodriguez M, 2010, Suppression of Burst Oscillations in Racing Motorcycles, 49th Conference on Decision and Control; CDC 49
Evangelou SA, 2010, Control of motorcycles by variable geometry rear suspension, IEEE International Conference on Control Applications Part of 2010 IEEE Multi-Conference on Systems and Control, Publisher: IEEE, Pages: 148-154, ISSN: 1085-1992
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- Citations: 5
Thommyppillai M, Evangelou S, Sharp RS, 2009, Car driving at the limit by adaptive linear optimal preview control, Vehicle System Dynamics, Vol: 47
Thommyppillai M, Evangelou S, Sharp RS, 2009, Advances in the development of a virtual car driver, MULTIBODY SYSTEM DYNAMICS, Vol: 22, Pages: 245-267, ISSN: 1384-5640
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- Citations: 20
Thommyppillai M, Evangelou S, Sharp RS, 2009, Rear-heavy car control by adaptive linear optimal preview, Vehicle System Dynamics
Thommyppillai M, Evangelou S, Sharp RS, 2009, Towards a Practical Virtual Racing-Car Driver, European Control Conference 2009
Evangelou S, Limebeer DJN, Rodriguez MT, 2008, Influence of Road Camber on Motorcycle Stability, JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME, Vol: 75, ISSN: 0021-8936
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- Citations: 11
Evangelou S, Limebeer DJN, Tomas-Rodriguez M, 2007, Influence of Road Camber on Motorcycle Stability., Journal of Applied Mechanics
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