Fault-Tolerant Control of EMB Systems

Ki, Young-Hun; Ahn, Hyun-Sik; Cheon, Jae-Seung

doi:10.4271/2012-01-1795

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…Schwarz et al [40] first proposed measuring the brake pad position by measuring motor rotor position and motor current. Many others followed, showing that a force sensor can be saved by measuring the electric attributes of the motor and its position [39,[41][42][43][44].…”

Section: Sensorsmentioning

confidence: 99%

Short Review of EMB Systems Related to Safety Concepts

et al. 2022

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A growing interest in Electromechanical Brakes (EMBs) is discernible in the automotive industry. Nevertheless, no EMBs have ever been deployed for series production, although countless publications have been made, and patents have been filed. One reason for this is the need for the optimization of functional safety. Due to the missing mechanical/hydraulic link between the driver and the actuator, sophisticated concepts need to be elaborated upon. This paper presents the current state of the art of safety concepts for EMB systems (only publicly available publications are reviewed). An analysis of current regulatory and safety requirements is conducted to provide a base for design options. These design options are explored on the basis of an extensive patent and literature research. The various discovered designs are summarized and analyzed according to their (a) EMB actuators; (b) control topology; (c) energy supply; and (d) communication architecture. This paper concludes by revealing the weak points of the current systems.

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Section: Sensorsmentioning

confidence: 99%

Short Review of EMB Systems Related to Safety Concepts

et al. 2022

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“…There have been numerous studies on motor control methods that address clamping force control, including PI controller using basic control of current and speed under vector control [4], control of clamping force using a sliding mode controller [5], adaptive sliding mode control using a neural network to estimate [6], estimation methods of clamping force considered as gear friction [7], estimated control of clamping force using the rotor position due to impossible applications of force sensors based on the spatial constraints of the driving part [8,9], observer-based sensor-less robust force control methods [10], and fault diagnosis and tolerant control techniques based on the failure of the sensor [11][12][13][14][15][16]. Despite the number of studies, challenges still remain in terms of improving the safety requirements in automotive field, as well as the aspect of increasing costs of the entire braking system due to the complexity of the control system in comparison with hydraulic systems.…”

Section: Introductionmentioning

confidence: 99%

A Clamping Force Performance Evaluation of the Electro Mechanical Brake Using PMSM

Baek

Kim

et al. 2018

Energies

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This paper deals with clamping force simulation and experimental result of the Electro Mechanical Brake (EMB) for the High-Speed-Train (HST). Three phase Surface Permanent Magnet Synchronous Motor (SPMSM) is applied to the clamping force control of EMB. At the initial development stage, Proportional Integral (PI) current control under synchronous d-q axis frame was applied to the SPMSM torque control. In addition, an anti-windup controller, which is advantageous for fast current tracking, is proposed to improve the torque output. Matlab/Simulink simulation results were compared with the experimental results measured by the clamping force sensors of the EMB test rig. The experimental results were verified compared to the brake design specification of the High-Speed Electric Multiple Unit-430 Experimental (HEMU-430X) train.

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“…Kim et al [13] proposed an FTC strategy for four-wheel distributed braking systems at the vehicle dynamics level using a sliding mode algorithm and verified the effectiveness of this approach with a series of hard-inloop simulations. Ki et al [14] proposed a fault-tolerant logic to detect sensor faults during driving or braking. To maintain performance in the case of faults, a bumpless transfer technique was used.…”

Section: Introductionmentioning

confidence: 99%

Driver Model-Based Fault-Tolerant Control of Independent Driving Electric Vehicle Suffering Steering Failure

Cen

Zhang

2018

Automot. Innov.

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This paper presents a fault-tolerant control (FTC) strategy for a four-wheel independent driving electric vehicle suffering steering failure. The method is based on the functional redundancy of driving and braking actuators to recover the vehicle's steering ability. A dynamic vehicle model is derived with the function of four-wheel driving. A sliding mode controller with a combined sliding surface is employed as a motion controller, allowing the desired vehicle motion to be tracked by the adaptive driver model. An extended Kalman filter-based state estimator is adopted to virtually measure the sideslip angle while considering the nonlinear tire force. A new allocation strategy, involving two distribution modes of coordination, is designed. In addition, a weight coefficient adjustment strategy is implemented in optimal mode based on the lateral load transfer, thus improving the steering performance. Simulations are conducted to verify the proposed FTC algorithm. The results demonstrate that steering failure can be effectively covered by the functional redundancy of the driving/braking actuators.

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Fault-Tolerant Control of EMB Systems

Cited by 7 publications

References 19 publications

Short Review of EMB Systems Related to Safety Concepts

Short Review of EMB Systems Related to Safety Concepts

A Clamping Force Performance Evaluation of the Electro Mechanical Brake Using PMSM

Driver Model-Based Fault-Tolerant Control of Independent Driving Electric Vehicle Suffering Steering Failure

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