Hardware-In-the-Loop (HIL) Testing of ESP (Electronic Stability Program) Commercial Hydraulic Units and Implementation of New Control Strategies 2004-01-2770
Firstly, the paper presents Politecnico di Torino Hardware-in-the-Loop (HIL) brake systems test bench. Secondly, it describes in detail all the necessary basic tests to characterize, on the bench, an ESP hydraulic unit: for example, step response of each valve, measurement of pressure limiter valves calibration, step response of motor pump unit. The experimental results are reported.
Thirdly, the paper deals with the frequency response of ESP valves, by using Pulse Width Modulation. Pressure gradients and pressure oscillations obtained in the tests are commented in detail.
An open loop actuation strategy for ESP is presented, permitting to obtain, in each condition, the desired wheels pressure levels, without having any output pressure sensor in the hydraulic unit. This strategy was conceived by simulation and then successfully tested on the bench.
An ESP control strategy, complete of a diagnostic algorithm, was added to the actuation logic described before and tested on the bench.
Citation: Sorniotti, A. and Velardocchia, M., "Hardware-In-the-Loop (HIL) Testing of ESP (Electronic Stability Program) Commercial Hydraulic Units and Implementation of New Control Strategies," SAE Technical Paper 2004-01-2770, 2004, https://doi.org/10.4271/2004-01-2770. Download Citation
Aldo Sorniotti, Mauro Velardocchia
Politecnico di Torino, Department of Mechanics
22nd Annual Brake Colloquium & Exhibition
SAE 2004 Transactions Journal of Passenger Cars: Mechanical Systems-V113-6