overshoot


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o·ver·shoot

(ō'vĕr-shūt),
1. Generally, any initial change, in response to a sudden step change in some factor, that is greater than the steady-state response to the new level of that factor; common in systems in which inertia or a time lag in negative feedback outweighs any damping that may be present. Changes in a negative direction are sometimes distinguished by the term undershoot, and the two may alternate in an oscillatory fashion, as in the transient oscillations of a pendulum when released from an initial displacement.
2. Momentary reversal of the membrane potential of a cell (inside becoming positive rather than negative relative to the outside) during an action potential; considered a form of overshoot1 because, before discovery of overshoot2, excitation was thought merely to depolarize the membrane to zero transmembrane potential.

overshoot

[ō′vərsho̅o̅t′]
1 v, to go beyond or exceed a target or goal.
2 n, an upper part of a structure that extends beyond the lower part.

o·ver·shoot

(ō'vĕr-shūt)
1. Any response to a step change in some factor that is greater than the steady-state response to the new level of that factor; common in systems in which inertia or a time lag in negative feedback outweighs any damping that may be present.
2. Momentary reversal of the membrane potential of a cell (inside becoming positive rather than negative relative to the outside) during an action potential.

overshoot

the stage of an ACTION POTENTIAL in which the voltage rises from zero to the positive peak.
References in periodicals archive ?
Discrete controllers feature active-tuning with advanced PID algorithms that suppress and eliminate overshoot on start-up, process upsets or setpoint change; digital communications, field programmable heater and loop break alarms.
For example, to eliminate overshoot from the true setpoint, the Super Control might feed a lower artificial setpoint into the controller's autotuning PID algorithms.
Algorithm minimizes overshoot of setpoint when initiated from ambient.
Temperature controllers keep shrinking, use "fuzzy logic" to avoid overshoot.
An LDO using a low ESR load capacitor will exhibit superior transient response with less undershoot or overshoot.
This advanced package technology also contributes to the device's low clamping voltage and minimal parasitic inductance, which virtually eliminates voltage overshoot caused by the package leads and bond-wires in conventional packages.
Our new Spread Spectrum and Low Bandwidth PLLs are rich with features and are based on the same core technology as our other low-jitter PLLs, including special circuitry that allows for very fast locking with minimal frequency overshoot.
1 with advanced overshoot and undershoot analysis will help us maintain this perfect track record for even our most demanding next-generation communications chips.
5% of GDP deficit for 2002 that will modestly overshoot the government's 2.
Karen Naylor, a managing director at the group said the market could potentially overshoot initial year-end forecasts following on the strong growth exhibited to date.
5Vdc; 2) wide output voltage adjustment trim of +15% and -20%; 3) zero turn-on overshoot to provide a very clean and reliable operating environment for the system; 4) high efficiency of up to 92%; 5) excellent thermal de-rating of up to 37 Amps output at 1.
Investors should keep in mind, though, that financial markets tend to overshoot on both the upside, and the downside, with several "hiccups" along the way to a full recovery," stated Peter Antipatis.