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High-precision measuring instrument which determines pressure by "weighing" it whereby the force on the piston is compared with the force exerted by calibrated weights. In order to eliminate friction,

Theoretical methods for the studying static and dynamic behaviour of , e.g. differential equations, Nyquist plots, frequency response , root locus as well as digital or analogue simulation.

Sum of the measures and processes that are necessary for a drive to place itself in operation automatically. These include: measuring system polling as whether all systems are operational, Undertaking

Control whose program is specified by the type of functional elements and their connections (DIN 19 237). With hard-wired controls, application-specific logical connections are made by individual pipe

Squarewave AC signal from 70 to 400 Hz with low amplitude that is superimposed on the DC control voltage as "hum". The dither signal is used on continuously adjustable valves and has the task of placi

Valves for the control or feedback control of a flow rate. They are therefore used to control the velocity of cylinders and motors. A differentiation is made between: Throttle valves , which are press

Hydraulic motors which permit at least 1,000 min--1 as the upper rotation speed limit, with the lowest rotation speed determined by the hydraulic-mechanical efficiency factor. In the case of uncontrol

Special form of annular gear motor whereby the outer ring with its seven teeth remains still, while the inner wheel with its six teeth performs a planetary-type movement. As a result, a volume associa

Hydrostatic transmission involving a pump combined with a motor in a block design. In general, stationary forms of hydrostatic transmission are designed as an integral hydrostatic transmission whereby

Volume displaced by a stroke or other cycle on all displacement elements on a displacement unit (pump/motor) during one revolution of the drive shaft. The output volume is generally stated in cm 3 . G