Dynamic analysis of a closed-circuit hydrostatic summation drive using bent axis motors

This article investigates the dynamic performance of a closed-circuit hydrostatic summation drive that has been carried out through system modeling and simulation. The proposed drive consists of a variable displacement piston pump and bent axis motors. The performances of the hydrostatic drive have been studied for its two different modes of operations, using single motor and two motors. The changing over of the drive mode is accomplished by on-/off-controlled direction control valve. Bondgraph simulation technique is used to model the hydrostatic drives. The characteristics of the loss coefficients of the drive are obtained from the steady-state model and they are identified through experimental investigation. Using them, the overall dynamic model of the hydrostatic drive has been validated experimentally. With respect to some critical parameters, the performances of the hydrostatic drive have also been studied.