This paper describes the design and prototyping of a new high-performance actuation system that combines the benefits of conventional hydraulic systems and direct-drive electrical actuators, namely high torque/mass ratio and modularity. It is referred to as the electrohydraulic actuator (EHA) and results from the fusion of the above-mentioned technologies. The EHA is a unique device with its own characteristics and requires hydraulic components that are specifically tailored to its needs and requirements. Based on a mathematical model of the EHA, the requirements for its components are determined. These requirements are used as a basis for component selection, component modification, and design of a customized new symmetrical linear actuator. The analysis of the EHA presented is supported by experimental data and explains the extremely high level of performance attained by a prototype of the EHA.
[1]
James E. Bobrow,et al.
Modeling and Analysis of a High- Torque, Hydrostatic Actuator for Robotic Applications
,
1989,
ISER.
[2]
Watton,et al.
Fluid Power Systems
,
1991
.
[3]
S R Habibi,et al.
Computed-Torque and Variable-Structure Multi-Variable Control of a Hydraulic Industrial Robot
,
1991
.
[4]
Noah D. Manring,et al.
Modeling and Designing a Hydrostatic Transmission With a Fixed-Displacement Motor
,
1998
.
[5]
R. J. Richards,et al.
Hydraulic actuator analysis for industrial robot multivariable control
,
1994,
Proceedings of 1994 American Control Conference - ACC '94.