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Encyclopedia > Deadband

attention Look up Attention in Wiktionary, the free dictionary Attention is the cognitive process of selectively concentrating on one thing while ignoring other things. ...


Deadband is an area of a signal range or band where no action occurs (the system is dead). Deadband is used in voltage regulators, thermostats, and alarms. The purpose is common, to prevent oscillation or repeated activation-deactivation cycles (called 'hunting' in proportional control systems). Signaling, or a signal, may mean: Look up signal in Wiktionary, the free dictionary Scientific concepts In information theory, a signal is a flow of information that can be represented as a mathematical function. ... The range of a vehicle is the maximum distance it can cover without needing to be refueled or recharged. ... This page deals with the cessation of life. ... A voltage regulator is a mechanical, solid state or vacuum tube device designed to regulate DC voltage levels. ... Bi-metallic thermostat for buildings A thermostat is a device for maintaining the temperature of a system within a range by controlling the flow of heat energy into or out of the system. ... ALARM (Air Launched Anti Radar Missile) is a British anti-radiation missile designed primarily to destroy enemy radars for the purpose of Suppression of Enemy Air Defence. ... Oscillation is the periodic variation, typically in time, of some measure as seen, for example, in a swinging pendulum. ... A cycle is anything round, in the physical sense (e. ... attention A proportional control system is a type of linear feedback control system. ...

Contents


Examples:

voltage regulators

In some substations there are regulators that keep the voltage within certain predetermined limits, but there is a range of voltage in-between during which no changes are made, such as, maybe, between 112 to 118 Volt (deadband is 6 Volt here), or 215 to 225 Volt (deadband is 10 Volt here). A voltage regulator is a mechanical, solid state or vacuum tube device designed to regulate DC voltage levels. ...


thermostats

The furnace in the basement of a house is adjusted automatically by the thermostat to be switched on as soon as the temperature at the thermostat falls to, maybe, 18° Celsius, and the furnace is switched off by the thermostat as soon as the temperature at the thermostat reaches 22° Celsius. Then the deadband is 4° Celsius. Bi-metallic thermostat for buildings A thermostat is a device for maintaining the temperature of a system within a range by controlling the flow of heat energy into or out of the system. ...


alarms

A smoke detector at the ceiling of the kitchen starts the alarm as soon as the level of the gases reaching it from the burning toast is at, say, "x", then the smoke detector stays in the alarm position until the level of gases have been reduced to level "y", after which the smoke detector is reset automatically to "normal". The deadband here is x minus y. ALARM (Air Launched Anti Radar Missile) is a British anti-radiation missile designed primarily to destroy enemy radars for the purpose of Suppression of Enemy Air Defence. ...


  Results from FactBites:
 
Patent 4136508: Closed-loop combine header height control (5134 words)
Known header height controls have a "deadband" within which the control is disabled when header height is between the raise and lower deadband limits at which the height sensors actuate the electrohydraulic power means to respectively raise and lower the header, and some controls also have means to vary the width of such deadband.
5 is a diagrammatic illustration of deadband in the disclosed embodiment of the invention.
Deadband adjusting potentiometer DB, which is accessible at the operator's platform, permits variation of gain of summing amplifier SA and thus establishes the "rate" at which error voltage C varies for a unit height error, i.e., a unit deviation of measured header height from height setpoint.
Deadband - Wikipedia, the free encyclopedia (142 words)
Deadband is an area of a signal range or band where no action occurs (the system is dead).
Deadband is used in voltage regulators, thermostats, and alarms.
In some substations there are regulators that keep the voltage within certain predetermined limits, but there is a range of voltage in-between during which no changes are made, such as, maybe, between 112 to 118 volts (deadband is 6 volts here), or 215 to 225 volts (deadband is 10 volts here).
  More results at FactBites »


 

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