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Refers to the frequency of a coupled system, in which the external periodic excitation in the system brings about the maximum amplitudes, i.e. where the exciter amplitude is most amplified.

Rotary encoders

Conversion of an analogue variable into a discrete representation. In general, therefore, this means quantising an amplitude, with the amplitude area divided into smaller subsections. The process is k

Error, which arises when quantising analogue sizes, as only a limited resolution is possible, which causes a systematic error . It is equal to half of the change of the input voltage needed to change

Toroidal ring made of elastic materials, with an almost square cross-section ( Figure Q 1 ).

Describes the flow rate-pressure characteristic of a concentric flow resistance ( orifice , Bernoulli's principle). Does not apply for laminar flow resistance (e.g. capillary tube ).

Pressure/flow control

Allows moving to a certain point on the level, without needing to define a functional relationship along the movement path in the individual path axes. The movements may be performed simultaneously or

Adjustments of positive displacement machines.

Valve that switches the pump to a pressure-free circulation as soon as its flow rate is no longer needed in the circuit. Special 2/2 directional valves or pressure valves are suitable for use as a shu