Testing the Mechatronic Wedge Brake

Roberts, R.; Gombert, B.; Hartmann, Henry; Lange, Dittmar; Schautt, Martin

doi:10.4271/2004-01-2766

Cited by 39 publications

(21 citation statements)

References 2 publications

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“…The results presented in this paper were generated using an initial version of the controller, prior to optimization of the mechatronic system. Consequently they represent relatively slow dynamics compared both to earlier results from the tandem motor concept [3] and to the current state of development of this actuator.…”

Section: Roller Test Bench Resultsmentioning

confidence: 86%

“…The initial investigation of the wedge brake concept is described in [1]. The concept was then further developed by eStop, which introduced the alpha-prototype, with the ability to realize the full braking force expected from a modern disc brake system [2,3]. At the center of the alpha prototype design is the brake heart, which realized the wedge braking principle, and the dual motor concept, which removed backlash in the transmission (Figure 1).…”

Section: History Of the Electronic Wedge Brakementioning

confidence: 99%

“…The cascaded controller concept for the single motor solution is structurally simpler than the control for the Beta prototype which had two motors. In the Beta solution, which was used in the references [2] and [3], a preload control had to be added to prevent backlash effects disturbing the control quality. Since the new prototype is designed such that the freeplay can be neglected over the lifetime of the brake, a preload control is no longer required and the controller has a pure cascaded structure, as depicted in Fig.…”

Section: Cascaded Controllermentioning

confidence: 99%

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Modeling and Control of a Single Motor Electronic Wedge Brake

Fox¹,

Roberts²,

Baier-Welt³

et al. 2007

SAE Technical Paper Series

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Siemens VDO is currently developing a brake-by-wire solution called the Electronic Wedge Brake (EWB). Earlier prototypes used a two-motor concept inside the brake actuator to drive the wedge. In this paper, a new prototype generation is presented where only one motor is needed. This is more efficient in terms of cost, and actuator weight, and also reduces the complexity of the control strategy. A state-space model is derived for the new actuator and two controller structures are explained. Simulations and experimental results from a roller test bench are shown.

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Section: Roller Test Bench Resultsmentioning

confidence: 86%

Section: History Of the Electronic Wedge Brakementioning

confidence: 99%

Section: Cascaded Controllermentioning

confidence: 99%

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Modeling and Control of a Single Motor Electronic Wedge Brake

Fox¹,

Roberts²,

Baier-Welt³

et al. 2007

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…(1) and (2) relates to the applied force direction. Roberts et al [9] have presented a self amplifying disc brake with two electrical actuators to generate the applied force both in forward and reverse directions. They have modelled the brake and compared the experimental and analytical results.…”

Section: Introductionmentioning

confidence: 99%

Influence of Water, Oil and Dust on the Performance of Conventional and Wedge Disc Brakes

Mahmoud

Mourad

2014

Int. J. Vehicle Structures and Systems

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In this work, laboratory tests have been carried out to investigate the influence of the presence of water and oil film, as well as the existence of wet dust between the disc and brake pads on the performance characteristics of conventional and wedge disc brakes are examined. The number of brake application and its influence on friction at dry and wet conditions are also investigated. The results indicated that the presence of a water layer between brake pads and disc led to increased friction coefficient and therefore increased the brake shoe factor. The presence of oil film between the friction surfaces lead to obvious reduction in the coefficient of friction. The influence of the presence of wet dust between the friction surfaces has a negligible influence on both conventional and wedge disc brakes.

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“…Siemens VDO are pioneers of making a working EWB systems from 2004 to 2007. They developed the 'beta' in 2004 which had dual motor activation for backlash prevention [10]. The brake was designed to be mounted on a brake disk inside a wheel and was tested in test vehicles.…”

mentioning

confidence: 99%

Modelling and Validation of An Electronic Wedge Brake System with Realistic Quarter Car Model for Anti-Lock Braking System Design

Soomro

Hassan

Ahmad

2019

IJIE

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Automotive vehicles are an integral part of almost every human being in every part of the world. The coming years will see increasing electrification of vehicles. The shift to electric vehicles is driven by the need of energy efficient and eco-friendly vehicles with low CO2 emission. Efficient use of the available energy requires the following [1]: Minimizing power losses in passive mode.  Maximizing efficiency of components.  Controlling power consumption via intelligent battery management and consumers. These factors motivate car companies to move towards drive-by-wire solutions in the future. With the advent of faster and more powerful computers and electronic components, the shift from mechanical systems to mechatronic systems is becoming reality. Mechatronic systems provide smarter, safer and more efficient solutions for vehicles.Drive-by-wire refers to automotive systems which replace the bulky and prone to failure mechanical systems like steering, braking, throttling, by mechatronic components. In drive-by-wire systems, the command signals to achieve the different tasks are carried by wires in form of electric signals and the command is passed on to mechatronic actuators. One such system is brake-by-wire (BBW), where the bulky brake fluids, pumps and pipes are replaced by electric wires, Abstract: With the advancement in battery and electronics technologies, soon Electric Vehicles (EV) will replace traditional vehicles as they are more efficient and environment friendly. This will require replacement of all mechanical systems in vehicles with their electrical counterparts. This study focuses on electromechanical brakes (EMB) as replacement of hydraulics brakes. Particularly a type of EMB known as Electronic Wedge Brake (EWB) which uses wedges to create self reinforcing braking force and consume less power than other EMBs. Detailed mathematical model of an EWB system is presented which provides braking force and torque to the disk brake. A Quarter Car Model (QCM) with realistic parameter values and aerodynamic deceleration is modelled to validate the EWB system. The system is validated for different road conditions and anti-lock braking system (ABS) is demonstrated for snowy road using a single PID controller. The results validate the brake and car model and a need for cascaded control strategy to implement ABS is established.

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Testing the Mechatronic Wedge Brake

Cited by 39 publications

References 2 publications

Modeling and Control of a Single Motor Electronic Wedge Brake

Modeling and Control of a Single Motor Electronic Wedge Brake

Influence of Water, Oil and Dust on the Performance of Conventional and Wedge Disc Brakes

Modelling and Validation of An Electronic Wedge Brake System with Realistic Quarter Car Model for Anti-Lock Braking System Design

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