It is possible that using a hydraulic or an electrical actuator to drive a machine will give a ‘good’ result in many situations. In these cases ‘good’ is a qualitative statement describing situations where the number revolutions per second, the speed, power or torque (or a combination of these values) provide a satisfactory operational result for the chosen drive mechanism. Often no qualitative constraints are stipulated for the accuracy of the speed, output force, torque or dynamic behaviour of the machinery. All these drives are so-called controlled or open-loop drives. There is no feedback mechanism from the main controlled variable. Many users would, initially, rather not have a feedback mechanism because for them it means that the delivery will include extra sensors and a mysterious ‘black box’ with an electronic control mechanism.
KeywordsMotion Control Positional Error Polar Diagram Hydraulic Cylinder Drive Mechanism
Unable to display preview. Download preview PDF.
- Albers, P.S., (1994) Course on Proportional and Servo-hydraulics, Ingenieursbureau Albers bvGoogle Scholar
- Course book: Systems and Control 1, Department of Mechanical Engineering, Technical University Delft, 2008Google Scholar
- Viersma, T.J., (1990) Analyses, Synthesis and Design of Hydraulic Servosystems and Pipelines, Delft University of TechnologyGoogle Scholar