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compensates for interference present in the controlled subsystem by estimating the disturbance variable with an observer and connecting it inversely to the feedback controller. Example: Compensation for the

Systems in which only binary signals are transferred. They can contain, along with discontinuous two-point elements, also continuous elements provided the binary character of the overall system is retained

applies to it ( flow control valve ). Continuously adjustable valves are combined for this purpose with a , which can be arranged at the inlet or the outlet ( Figure L 8 ).

actuations or to protect against overloading. The safety elements required for this, such as valves with a redundant design, electrical monitoring of switching procedures, protection against unauthorised

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 placing

be achieved by the provision of state signals to the machine controls that, by means of comparison with the setpoints , detect deviations (self-checking). Provided the fault diagnostics also provide early

without auxiliary energy, which converts an input signal into an with the same physical properties and a value range suitable for the downstream elements. Example: Voltage converter, electrical potentiometer

directional valves . They increase linearly towards a maximum as flow increases and then decrease with a hyperbolic pattern as the switching distance increases ( Figure S 102 ) ( Bernoulli force ).

therefore comprises the entire complex from the sensing element ( sensor ) to the measuring equipment with digital processing electronics, including the processor and software ( sensor system ).

different time; Delay element: Timer element, which reflects the change of the input signal over time with a delay; Signal contracting element: Timer element, which contracts the input signals; Signal stretching