Shuttle valve
Check valve with two inlets and one outlet. The pressurised inlet is automatically connected to a shared outlet, while the other inlet is blocked ( Figure W 4 ).
Amplitude margin
Is the factor with which the static transfer factor of the open control circuit must be multiplied so that the related closed control circuit is at the stability boundary.
Two-hand control
Control unit of a machine tool, which only issues an output signal if it is actuated with both hands simultaneously. Two-hand controls are mandatory for manually operated presses.
Resistor circuits
Another comprehensive term for control with throttle, which includes all types of dosing of flow rates by changing flow resistances, as they are primarily also basic elements of .
Automatic fault detection
Procedure that compares the output of a system with the results from the calculation in a model of this system and that sounds an alarm if deviations are excessive.
Amplitude plot
Graphic representation of the amplitude response . Together with the graphically represented phase-frequency response it forms the frequency characteristic ( Bode diagram ) according to DIN 19 226.
Rotary piston
Effective element of a limited angle rotary actuator with mostly a rectangular cross-section that is fastened to the shaft and to which a flow of hydraulic fluid is applied.
Cross-section dependent pressure loss
changes. The pressure loss factor ξ is required for the calculation. The pressure losses increase with the square of the flow velocity.
Filter surface
area of the filter element that is subjected to the flow rate. To make this area as large as possible with given filter dimensions, the majority of are folded.
Analogue technology
Collective term for all electronic signal processing and switching technology that has analogue behaviour with the characteristic that the output variable changes corresponding to the change in the input variable