Modeling Analysis And Experimental Investigation Of A Variable Displacement Linkage Pump Shawn Wilhelm by Shawn Wilhelm instant download after payment.

In this thesis, a complete model of a variable displacement linkage pump is
developed. A method of constructing the adjustable sixbar mechanism and the possible
embodiments is presented. A new solution rectification technique is developed providing
a robust method of generating valid linkages that is generally applicable to other
mechanisms. The kinematics of the mechanism are then presented to describe the motion
of the links and output piston. A kinetostatic model of the mechanism provides a means
of determining the internal mechanical energy losses. A non-linear model of the bearing
friction augments the model, but requires numerical methods to solve, and increases
computational complexity. A dynamic model of the pumping cylinders and pump
manifold provide a means of determining the fluid behavior of the pump including output
flowrates and pressures. These models are coupled to create a complete understanding of
the variable displacement linkage pump. The model is designed to be predictive and
computationally inexpensive for use in multi-objective optimizations. As such, no
experimentally determined performance coefficients are required. No model of this level
of completeness exist for linkage driven pumps, variable displacement or otherwise.