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For speed measurement analogue or digital measuring procedures are used. Analogue tacho generators or rotary encoders are not particularly suitable for low rotation speeds due to their low signal leve

Flow valve with fixed or adjustable throttling cross-section. Its flow is dependent on the pressure difference at the throttle: the smaller the pressure difference Δp between the (constant) inlet pres

Group of elastic materials, which become soft (thermoelastic) when energy is added (temperature increase), where moulded parts lose their form (voltage). When cooling, plastification of the materials

Motor in connection with a clock as a pilot actuation such that the motor follows the steps exactly. There have even been hydraulic stepper motors, in which a body of rotation controlled by a solenoid

Part of the description of a linear, time-invariant transfer element whereby the phase-frequency response represents the frequency-dependent element of the angle through which an is shifted in relatio

Hydraulic pump with constant geometric displacement V 1 for each revolution and therefore a constant delivery flow Q 1 at constant drive speed n 1: Q 1 = V 1 · n 1.

The reference variable in a control or is a variable not affected directly by the related control or feedback control that is provided to the open loop control system or the from the exterior and that

Complete sequence of events or conditions that repeat periodically ( working cycle ).

Processes the discrete time signals from a sampler. It comprises a controlled subsystem with , a microprocessor, a sampler (mostly A/D converters) and a holding element (Figure A 9). The sampler sampl

As new mineral oil is most definitely not pure (generally contamination class 6...7 according to NAS 1638), it should be filtered on filling the tank. Filler filters and breather filters comprise an a