Modelling and control of a brake system for an extended range electric vehicle equipped with axle motors

Bayar, Kerem; Biasini, Ricardo; Onori, Simona; Rizzoni, Giorgio

doi:10.1504/ijvd.2012.047387

Cited by 23 publications

(20 citation statements)

References 18 publications

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“…The sensor signals are transmitted to the brake- and motor-control modules having 5- and 1-ms sampling periods, respectively. For the details of the mathematical models used in the simulator, the reader is referred to studies of Bayar and colleagues 23–25 for brevity. The parameters used for the simulator (sprung/unsprung masses, drivetrain inertias, brake system parameters, etc.)…”

Section: Different Electric-vehicle Drivetrain Architecturesmentioning

confidence: 99%

Performance comparison of electric-vehicle drivetrain architectures from a vehicle dynamics perspective

Bayar

2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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Recent electric vehicle studies in literature utilize electric motors within an anti-lock braking system, traction-control system, and/or vehicle-stability controller scheme. Electric motors are used as hub motors, on-board motors, or axle motors prior to the differential. This has led to the need for comparing these different drivetrain architectures with each other from a vehicle dynamics standpoint. With this background in place, using MATLAB simulations, these three drivetrain architectures are compared with each other in this study. In anti-lock braking system and vehicle-stability controller simulations, different control approaches are utilized to blend the electric motor torque with hydraulic brake torque; motor ABS, torque decomposition, and optimal slip-tracking control strategies. The results for the anti-lock braking system simulations can be summarized as follows: (1) Motor ABS strategy improves the stopping distance compared to the standard anti-lock braking system. (2) In case the motors are not solely capable of providing the required braking torque, torque decomposition strategy becomes a good solution. (3) Optimal slip-tracking control strategy improves the stopping distance remarkably compared to the standard anti-lock braking system, motor anti-lock braking system, and torque decomposition strategies for all architectures. The vehicle-stability controller simulation results can be summarized as follows: (1) higher affective wheel inertia of the on-board and hub motor architecture dictates a higher need of wheel torque in order to generate the tire force required for the desired yaw rate tracking. A higher level of torque causes a higher level of tire slip. (2) Optimal slip-tracking control strategy reduces the tire slip trends drastically and distributes the traction/braking action to each tire with the control-allocation algorithm specifying the reference slip values. This reduces reference tire slip-tracking error and reduces vehicle sideslip angle. (3) Tire slip trends are lower with the hub motor architecture, compared to the other architectures, due to more precise slip control.

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Section: Different Electric-vehicle Drivetrain Architecturesmentioning

confidence: 99%

Performance comparison of electric-vehicle drivetrain architectures from a vehicle dynamics perspective

Bayar

2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…For this reason, a transition process is introduced for motor torque, which is effective to prevent the motor from overshoot. The transition process is described as equation (21) and (22).…”

Section: Distribution Of Regenerative and Friction Force On Driveshaftmentioning

confidence: 99%

“…pressure in caliper is 50ms [22]. It can be supposed that the response of DDEHB is faster than EHB because the oil in UDHC is compressed directly by EMLA while the pressure is still boosted by master cylinder at first and then passed to wheel cylinder by hydraulic pipeline in EHB.…”

Section: Experiments and Simulation Of Ddehbmentioning

confidence: 99%

Braking Method of Electric Vehicle Based on Direct Drive Electro- Hydraulic Brake Unit

Gong¹,

Chang²,

Jiang³

et al. 2015

TOMEJ

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For the characteristics of full electric propulsion, a novel kind of brake-by-wire unit is designed for electric vehicle to improve braking performance. A comprehensive brake-by-wire system including this unit is set up after its structure and principle are introduced. Then, a multi-layer fuzzy controller is proposed to regulate decelerate and wheel slip rate, and an optimal regenerative strategy is proposed to recover braking energy. At last, the experiment of brake unit is completed to verify that this novel unit is technologically feasible, and an electric vehicle co-simulation model based on MATLAB/Simulink and AMESim is established to prove that this novel unit is able to significantly improve braking performance of electric vehicle. The simulation result shows braking distance and time are shorten by 12.19% and 15.54% respectively compared with conventional ABS system in the same braking condition, and the recovery efficiencies in light and heavy braking are 53% and 28% respectively.

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“…For the safety of a motor vehicle, it would be very important to know the braking force on the wheel in real time. There are some indirect methods of measuring the braking force [7,8] and others that required a transformation of several vehicle systems [9]. However, at present, there is no device that allows this parameter, or the braking torque, to be measured directly without modifying the vehicle.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of a Compact Device for Measuring the Braking Torque of a Vehicle

Olmeda

Garrosa

Sánchez

et al. 2020

Sensors

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In this article, a new force transducer is designed, developed and built for the measurement of braking forces in the wheel rim of a motor vehicle. The parameters of the transducer design are justified using numerical simulation. In order to install it in the vehicle in a simple and interference-free way, the metal base of the caliper rod is used. It is manufactured and installed in a vehicle in order to obtain the signals of the wheel braking torque, in real time, and at different speeds of circulation, carrying out several tests on the track. Subsequently, data are obtained from calculations of the disc brake system itself. The latter provides instantaneous adherence values between the brake pad and the disc.

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Modelling and control of a brake system for an extended range electric vehicle equipped with axle motors

Cited by 23 publications

References 18 publications

Performance comparison of electric-vehicle drivetrain architectures from a vehicle dynamics perspective

Performance comparison of electric-vehicle drivetrain architectures from a vehicle dynamics perspective

Braking Method of Electric Vehicle Based on Direct Drive Electro- Hydraulic Brake Unit

Development and Characterization of a Compact Device for Measuring the Braking Torque of a Vehicle

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