ABSTRACT
This chapter contains a short report on the researches carried out by the authors on the structure, stroking force, modeling, simulation, and experimental performance identification for two important categories of axial piston servopumps: bent axis and swashplate one. It also contains the results of a systematic research on the steady-state behavior, and the transients occurring in a basic hydrostatic system containing a servopump. The chapter is devoted to the numerical simulation of the dynamics on the hydromechanical pressure compensators that are included in any modern servopump together with the hydraulic or electrohydraulic servosystem for the pump's flow rate control. The modern servopumps are controlled by hydromechanic or electrohydraulic servosystems according to the application performance demands. Special applications such as military ones require hybrid systems, including electric control devices and mechanical feedback, rigid or elastic ones. The flow-control module of the servopump was tested using sinusoidal and triangular waveforms supplied by Stanford Systems precision analog waveform generator.
