Parameter Estimation and Supervisory Techniques for Robust Longitudinal Control of Heavy Vehicles

Maria Druzhinina, Lasse Moklegaard and Anna G. Stefanopoulou

Institute of Transportation Studies, Research Reports, Working Papers, Proceedings from Institute of Transportation Studies, UC Berkeley

Abstract: This report describes the development and experimental validation of a coordination scheme between friction and discretely variable compression brakes for a Class 8 Freightliner truck used as a development platform in the California PATH program. The coordination scheme that we developed maintains the speed tracking performance of the nominal PID controller which was originally designed by the UCLA team for the case of friction brakes only. Through the coordination scheme, the command of the nominal PID controller is split into a friction brake command and compression brake command. The integration of the compression brake into the speed control framework reduces the usage and wear of the conventional friction brakes. This report describes the experimental hardware and software setup; open-loop experiments that were conducted to identify the models for the friction brake and the compression brake; the identification procedure of the friction brake and compression brake characteristics and the identification results; the development of the coordination scheme for the friction and compression brakes and the results of closed loop experiments that were used to validate the coordination scheme performance.

Date: 2003-04-01
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