Abstract
This paper presents an integrated control algorithm for a compound hybrid excavator. Both conventional hydraulic excavator and compound hybrid excavator models are developed to compute fuel consumption. The excavator simulation models, which consist of engine, pump and electric components have been validated with test data. To design the hybrid system’s integrated control algorithm which determines the output power of two motor/generators and ultra capacitor, a rule-based control algorithm to improve fuel economy is proposed. Simulation studies have been conducted for a typical digging process to investigate the performance of the proposed rulebased controller. Simulation results show that 26% reduction of fuel consumption can be obtained using the proposed controller to the compound hybrid excavator compared to the conventional hydraulic excavator.
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