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On systems that correspond to a 1st degree differential equation, the corner frequency is the intersection of the horizontal asymptote with the asymptote on the falling branch in a Bode diagram (see a

Computer that processes the incoming information immediately. Every computer in a must be a real time computer, otherwise it cannot intervene in the feedback control.

Between the shear stress τ = F/A and the velocity gradients in a moving fluid (Figure D 93) the following relationship applies: The proportionality factor η is called the dynamic viscosity . It is a m

Synonym: Frequently used expression for the velocity (dynamic) pressure

Characteristics of continuously adjustable valves that describe their . above all this is the: and/ or frequency response behaviour with amplitude response and phase-frequency response . Characteristi

Seal that has to seal a moving surface. Although the expression is often used, it is incorrect, as the seal is not "dynamic", but only seals a moving surface. Opposite: " static" seal .

On continuously adjustable pressure valves : dependency of the pressure on the flow rate with the input signal as a parameter (E DIN 24 311) (Figure D 81) .

The pressure gain on a continuously adjustable valve corresponds to the gradient on the pressure-signal function , e.g. 2,000 bar/mA. It is crucial for the accuracy that can be achieved with a control

Pressure difference as a function of the flow rate , e.g. for the reversed flow rate direction on valves with bypassing check valve:

Pressure losses produced by flow deflections and velocity changes. The pressure loss factor ξ is required for the calculation. The pressure losses increase with the square of the flow velocity.