Helmut Kogler, Rudolf Scheidl,
"Linear Motion Control with a Low Power Hydraulic Switching Converter - Part I: Concept, Test Rig, Simulations"
, in Proc. of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 3-2015, ISSN: 0959-6518
Linear Motion Control with a Low Power Hydraulic Switching Converter - Part I: Concept, Test Rig, Simulations
Sprache des Titels:
Switching control can also be employed for hydraulic motion control. Among the many hydraulic switching methods investigated so far, the so called hydraulic buck converter convinces by its simplicity. It consists of two switching valves, an inertance pipe, and a
hydraulic accumulator to flatten the pulsation resulting from switching. This accumulator entails significant softness and nonlinearity which, in combination with sealing friction of
the hydraulic cylinder, may lead to inferior performance with simple control concepts. In this paper a sub kilowatts hydraulic buck converter, its components, design, dimensioning,
and steady state performance characteristics are presented first. Measurements on a test rig for linear motion employing a simple P-controller show the necessity of a model based
control to achieve the desired control performance. Therefore, a dynamic model of the converter and the linear drive is derived and studied by simulations. It is shown, that the
model incorporates the relevant physical effects and that it is qualified for a flatness based control, which is derived in Part II of the publication.
Sprache der Kurzfassung:
Proc. of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering