Modification of vehicle handling characteristics via steer-by-wire

Yih, P.; Ryu, Jeha; Gerdes, J. Christian

doi:10.1109/acc.2003.1243465

Cited by 79 publications

(100 citation statements)

References 14 publications

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“…Recently, J. Christian Gerdes and al, [13] have developed HW force feedback based on a disturbance observer in which the align moment is considered as a source of disturbance in the system dynamics. Therefore, the aligning torque can be estimated without any torque sensors.…”

Section: A Model-based Approachmentioning

confidence: 99%

“…The inertia and damping constant of steering system. These constants are chosen based on steering system identification done by [13]. Step size: 0.001 (s).…”

Section: Simulationmentioning

confidence: 99%

“…Those include model-based approach [8], [13], [18], torque sensor-based method [9], [15], torque-map method [3], [15].…”

Section: A Model-based Approachmentioning

confidence: 99%

“…Recently, disturbance observerbased approach is implemented by Yih, P. and Gerdes, J.C. [13], and Shoji Asai, 2004 [5], etc. For this method, the realistic feelings could be obtained from the dynamic model using an observer.…”

Section: Introductionmentioning

confidence: 99%

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Direct current measurement based steer-by-wire systems for realistic driving feeling

Nguyen

Ryu

2009

2009 IEEE International Symposium on Industrial Electronics

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-In this paper, a method to reproduce realistic driving feeling and improve the returnability of steer-by-wire systems (SBW) is proposed by measuring the roadwheel motor's current directly. The key contribution presented here is a novel method to recreate the driving feeling in term of force feedback with simple and cheap current sensors. A current sensor is used to fully measure the steering torque on the rack of steering mechanism. This measured steering torque therefore, includes the overall effects of road conditions, aligning moments, tire properties and so on. Beside that, a free control scheme is proposed to improve returnability as well as the handwheel stability in a free motion. Moreover, during this research, the significant frequency effect of handwheel motions was found. This effect could be useful and valuable for improving steer-by-wire development based on torque-map based method. This method is investigated with simulation results using the control design and simulation module in LabVIEW programming language. The simulated results show that this method offers a cheaper and simpler solution for the development of steer-by-wire systems. In addition, stability and returnability of handwheel in steer-by-wire systems could be improved.

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Section: A Model-based Approachmentioning

confidence: 99%

“…The inertia and damping constant of steering system. These constants are chosen based on steering system identification done by [13]. Step size: 0.001 (s).…”

Section: Simulationmentioning

confidence: 99%

“…Those include model-based approach [8], [13], [18], torque sensor-based method [9], [15], torque-map method [3], [15].…”

Section: A Model-based Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Direct current measurement based steer-by-wire systems for realistic driving feeling

Nguyen

Ryu

2009

2009 IEEE International Symposium on Industrial Electronics

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“…This steering system is called the Steer-byWire (SBW) steering system. It uses an electric controller in place of a direct mechanical linkage or steering column to steer the wheel [8]. The obvious difference between this design and the conventional steering design is the removal of the steering shaft and column, which means there is no physical connection between the steering wheel and the rack and pinion setup [9,10].…”

Section: Introductionmentioning

confidence: 99%

Ride Comfort Simulation of a Vehicle Equipped With Semi-Active Steering System

Maharun¹,

Baharom²,

Mohd³

2015

Int. J. Automot. Mech. Eng.

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This paper presents a ride comfort analysis for a vehicle equipped with a novel steering system called the Semi-Active Steering system (SAS). Current vehicle steering systems, especially in cars which are equipped with a rack and pinion steering system, cause discomfort to the driver whenever the vehicle is driven on an uneven surface or over a pot hole. The driver may feel the vibration on the steering wheel due to the mechanical linkage of the rack and pinion steering system. The unique design of SAS which omits the solid linkage and replaces it with a low stiffness resilient shaft has made it possible to reduce the discomfort felt by the driver. In this research, two vehicle models were built in vehicle simulation software; one with a normal rack and pinion steering system and the other with the SAS system. Both vehicles were simulated on a four-post suspension test rig. Vibrations and steering wheel feel were observed and compared between the two models. The results show that the vehicle with the SAS system managed to improve the comfort by reducing the amount of vibration at the steering wheel. The findings may be useful for car manufacturers to improve the ride and comfort of the vehicle.

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Robust adaptive control of steer‐by‐wire systems under unknown state‐dependent uncertainties

Shukla

Roy

Gupta

2021

Adaptive Control & Signal

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Steer-by-wire (SBW) systems are considered as one of the most significant innovations among the technologies developed for advanced driver-assistance systems and autonomous vehicles. The main control challenge in a SBW system is to follow the steering commands in the face of parametric uncertainties and external disturbances; crucially, perturbations in inertial parameters and damping forces give rise to state-dependent uncertainties, which cannot be bounded a priori by a constant. However, the state-of-the-art control methods of SBW system rely on a priori bounded uncertainties, and thus, become inapplicable when state-dependent dynamics become unknown. This work, to the best of the authors' knowledge for the first time, proposes an adaptive control framework that can tackle the state-dependent uncertainties and external disturbances in a typical SBW system without any a priori knowledge of their structures and of their bounds. The stability of the closed-loop system is studied analytically via uniformly ultimately bounded notion and the effectiveness of the proposed solution is verified via simulations against the state-of-the-art solution.

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Modification of vehicle handling characteristics via steer-by-wire

Cited by 79 publications

References 14 publications

Direct current measurement based steer-by-wire systems for realistic driving feeling

Direct current measurement based steer-by-wire systems for realistic driving feeling

Ride Comfort Simulation of a Vehicle Equipped With Semi-Active Steering System

Robust adaptive control of steer‐by‐wire systems under unknown state‐dependent uncertainties

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