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This research paper gives a description of the Permo-Drive Regenerative Energy Management System, (PDREMS), and describes the development of a quasi-static computer based simulation of the Hydraulic Regenerative system for use on heavy commercial vehicles. Modeling of the PDREMS was done in the Matlab/Simulink environment, which was then implemented into the NREL's Advanced Vehicle Simulator (ADVISOR). Validation of the model was achieved through comparison to fuel trials performed on a vehicle with the PDREMS fitted. From the ADVSIOR software, predictions of PDREMS performance were made under different operating conditions on a series of different driving cycles. A brief summary of the postgraduate research being done at Monash University is given in the conclusion.

The work in this paper presents a technique for controlling a hybrid powertrain using fuzzy logic. Work has been carried out in this area previously for the case of hybrid-electric vehicles (HEV's), but the case for hydraulic-hybrids presents several different challenges. This paper describes the overall project on the hydraulic regenerative system, and its method of assisting braking and acceleration. The Fuzzy Logic Controller (FLC) for the powertrain is then introduced, along with the rule base and general strategy for operation. Thirdly, a description of the fuzzy controller's implementation into the NREL's ADVISOR is made, along with estimates of potential gains. Fourth, a discussion regarding the implementation of the FLC into the actual vehicle's control unit is made, with some suggestions for future work.