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10. Internationales Fluidtechnisches
Kolloquium

8. - 10. März | 2016
in Dresden

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Kurzfassung

16:00   ics       Saal 4

Development of a Simulation Model of a Self-Energizing Hydraulic Brake to Actively Compensate Brake Torque Oscillations

First author:
Matthias Petry, RWTH Aachen University, Institute for Fluid Power Drives and Controls (IFAS), Germany

Co-author(s):
Olivier Reinertz, RWTH Aachen University, Institute for Fluid Power Drives and Controls (IFAS)
Julian Ewald, Robert Bosch GmbH, Chassis Systems Control, Abstatt, Germany
Hubertus Murrenhoff, RWTH Aachen University, Institute for Fluid Power Drives and Controls (IFAS)

Abstract:
Friction force oscillations caused by changing properties of the contact zone between
brake disc and pad are well known from various applications. Resulting effects like
brake judder are known phenomena in brake technologies and in the scope of various
scientific work. A new measure to potentially reduce brake torque oscillations is the
active compensation with the use of the control system of a self-energizing hydraulic
brake (SEHB). New in comparison to traditional disc brakes is the fact that the brake
torque is measured by the pressure in an additional supporting cylinder. Thus, the
brake system is able to work in brake torque control mode. Within this paper a dynamic
simulation model of the SEHB is shown and evaluated with measurement data
achieved from a full scale test rig for railway applications. Based on the simulation
model a pressure control strategy is developed to minimize brake torque oscillations of
lower frequencies. The control parameters of the simulation are transferred to the
experimental setup. Finally, simulation and experimental results are compared. Future
work will deal with the development of control strategies to additionally minimize brake
torque oscillations of the higher dynamics.