A Novel Approach for Brake Squeal Control Using Shunted Piezoceramics

Neubauer, Marcus; Niederberger, Dominik; Morari, Manfred

doi:10.4271/2006-01-3198

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…The reaction force from the piezoceramics upon the mechanical system is not considered. This is hardly met in reality, because the rectangular shaped force signal generated by the piezoceramics is highly nonlinear and may excite higher harmonics within the system [11], so that the assumption of a harmonic excitation is not fulfilled. In order to have the most general results, normalized parameters are introduced,…”

Section: Modelingmentioning

confidence: 99%

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Analytical and experimental investigation of the frequency ratio and switching law for piezoelectric switching techniques

Neubauer

Wallaschek

2008

Smart Mater. Struct.

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Piezoelectric shunt damping with mechanical structures has been an active research topic for several years. Standard passive techniques suffer from a very limited and frequency-dependent damping performance. Recently, semi-active switching techniques-namely SSDI (synchronized switch damping on inductor) and SSDV (synchronized switch damping on voltage source) techniques-have been proposed, which are capable of adapting to variations of the excitation frequency without reduction in performance. Crucial for the damping performance is the tuning of the shunt parameters and the precise switching sequence.In this paper, an analytical analysis of the switching technique is presented, which includes the influence of all shunt parameters and the switching times. New results concerning the optimal tuning of the inductance and the switching sequence are obtained, and it is shown that the enhanced SSDV technique can be equated with the SSDI technique, albeit with an increased effective piezoelectric force factor. Measurements are conducted to validate the theoretical results.

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Section: Modelingmentioning

confidence: 99%

“…Because of the adaption to the excitation frequency, they can be used in systems with time-varying vibration frequencies. In [11], a switching technique was used to suppress squealing on an automotive disc brake.…”

Section: Introductionmentioning

confidence: 99%

Analytical and experimental investigation of the frequency ratio and switching law for piezoelectric switching techniques

Neubauer

Wallaschek

2008

Smart Mater. Struct.

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“…Like passive LR shunts, LRC networks with negative capacitance must be tuned to one frequency. Negative capacitance shunts have successfully been tested on a disc brake to suppress brake squeal [6,7].…”

Section: Introductionmentioning

confidence: 98%

Optimal piezoelectric switching technique for vibration damping

Neubauer¹,

Oleskiewicz

2007

SPIE Proceedings

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This paper describes piezoelectric switching techniques for vibration damping. The dynamical behaviour of a piezoceramics connected to a switching LR shunt and the dissipated energy are obtained using a fundamental piezoelectric model. All calculations are performed in a normalized way and highlight the influence of the electromechanical coupling coefficient of the piezoceramics and the shunt parameters. For the first time, a precise result for the dynamics of a shunted piezoceramics is derived. The analytic results are used to determine the optimal switching sequence and external branch parameters in order to maximize the damping performance. The results are validated by measurements of a clamped beam.

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“…Што је још важније, показало се да је активни систем контроле могао да спречи чак и појаву шкрипе. То доводи до могућег активног система контроле интегрисаног у кочни систем аутомобила у циљу спречавања шкрипе [197,198].…”

Section: активна контрола шкрипе кочницаunclassified

“…Слика 7.21 PZT актуатор унутар клипа стеге [197] Генерисање сигнала за погон актуатора захтева коришћење генератора функције, појачавача и трансформатора одговарајуће импедансе. [197].…”

Section: активна контрола шкрипе кочницаunclassified

nema

Glišović¹

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Automotive disc brake squeal is a major problem for the manufacturers of brake systems in terms of cost claim within the warranty period and it is a challenging problem for researchers for many years. The aim of this dissertation is to develop the mechanical finite element model of disc brake system which dynamic instability leads to the appearance of squeal and to verify the model by experimental research. The key issue in this process is to reveal the mechanism of high-frequency oscillations of the disc brake mechanisms and their effect on indicators of braking efficiency and overall levels of vehicle noise. Experimental research on a typical passenger car brake was conducted where the test matrix represents a partial simulation of SAE J2521 brake noise test. Laboratory testing using a brake dynamometer was performed to measure the squealing noise and braking torque and other parameters of braking process: braking pressure, speed and disc's temperature. This leads to the verification of the results predicted by numerical modeling. The unpredictable nature of squealing brakes was noticed through appearing and disappearing of eigenvalues of system as functions of various parameters, such as the sliding velocity, pressure and temperature during braking period. Parametric studies of geometry and material properties of brake components determine the contribution of each of these parameters to the emergence of squealing brakes. The developed approach can therefore be used as a tool to evaluate disc brake squeal by using finite element method.

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A Novel Approach for Brake Squeal Control Using Shunted Piezoceramics

Cited by 6 publications

References 12 publications

Analytical and experimental investigation of the frequency ratio and switching law for piezoelectric switching techniques

Analytical and experimental investigation of the frequency ratio and switching law for piezoelectric switching techniques

Optimal piezoelectric switching technique for vibration damping

nema

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