# Nachlauf

## English translation: overshoot

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
 German term or phrase: Nachlauf English translation: overshoot Entered by:

 12:48 May 25, 2002
German to English translations [PRO]
Tech/Engineering - Electronics / Elect Eng / Electronic control system
 German term or phrase: Nachlauf Das Steuergerät hat in dem Zustand x einen lokalen Nachlauf von x sec. und nimmt in dieser Zeit x mA Strom. I am not really satisfied with tracking, trailing, lagging (trailing is my preferred choice at the moment). Any other ideas?
 Local time: 23:28
 overshoot time Explanation: As per Wyhlidal,with explicit reference to Steuergerät/control unit. Transient response of the control system is an important quality of the system. It can be formulated in the time domain with properties of the unit step responses of the control system for the reference input signal or for the disturbances. Such properties are the overshoot and the settling time. (The settling time is defined as the time necessary to reach the steady value within 2-5 %.) Generally a small overshoot can be tolerated, but there are applications where aperiodic transients are required. A good approximation of the transient properties can be given also from system characteristics in the frequency domain. The overshoot defined in the time domain is related to the maximum amplitude of the closed loop frequency function, or to the phase margin calculated from the open loop frequency response. The settling time can be estimated from the cut-off frequency of the open loop. http://www.aut.bme.hu/education/jegyzet/contheor/goodbad/goo... see also this definition of Overshoot: overshoot: 1. In the transition of any parameter from one value to another, the transitory value of the parameter that exceeds the final value. Note: Overshoot occurs when the transition is from a lower value to a higher value. When the transition is from a higher value to a lower value, and the parameter takes a transitory value that is lower than the final value, the phenomenon is called "undershoot." 2. The increased amplitude of a portion of a nonsinusoidal waveform, i.e., signal, at the output of a nonlinear circuit, e.g., a realizable amplifier, caused by the characteristics of the circuit. (188). Note 1: Overshoot causes distortion of the signal. Note 2: Overshoot may result from circuit design parameters that are intended to decrease the response time of the circuit. Note 3: The amount of overshoot in a given circuit is designed to minimize response time while maintaining distortion of the signal within acceptable limits. The absence or presence of overshoot, and if present, its magnitude, is a function of a circuit design parameter called "damping." See illustration under waveform. 3. The result of an unusual atmospheric, e.g. , ionospheric, condition that causes microwave signals to be received where they are not intended. http://www.its.bldrdoc.gov/fs-1037/dir-026/_3808.htm. See if this works for you!
Selected response from:

Johanna Timm, PhD
Local time: 15:28
 Thanks to all. This seems the most likely in the (rather limited) context.4 KudoZ points were awarded for this answer

5a) overtravel b) overshoot c) coastingMirjam6
4power down (operation)
 jccantrell
4overshoot time
 Johanna Timm, PhD
4run-on o. run-on time/period
 Cilian O'Tuama
4shutoff delay or local lag time
 Klaus Herrmann
4post-operation
 Elvira Stoianov
4"Lag / Lag time"xxxbrute
4AfterrunTheo Bose
4huntingIngrid Grzeszik

Discussion entries: 3

18 mins   confidence:
hunting

Explanation:
would be my guess from the meaning of the German text. It says that the engine does not stop at once, but calms down. "Leo"'s explanation in brackets (Kybernetik) is what leads me to think that "hunting" could be the right word.

However, I am not the "great technician". Just a woman trying to understand the sentence.

Reference: http://dict.leo.org/?search=hunting&p=/fp..
 Ingrid GrzeszikNative speaker of: GermanPRO pts in category: 2

26 mins   confidence:
post-operation

Explanation:
The meaning is that the ECU (electronic control unit) has a post-operation time of x secs, and during this time the intensity decreases

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Note added at 2002-05-25 13:16:07 (GMT)
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maybe you could say delay time

 Elvira StoianovLuxembourgLocal time: 00:28Specializes in fieldNative speaker of: Romanian, HungarianPRO pts in category: 28

58 mins   confidence:
"Lag / Lag time"

Explanation:
Term used in electronic photography to describe time interval between release action an shutter activation!

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Note added at 2002-05-25 13:47:54 (GMT)
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Corr: an = and

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Note added at 2002-05-25 13:56:38 (GMT)
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Sentence option: \"The control device maintains in mode x, a local lag of X sec.; and consumes within this time lag x mA of current\"

 xxxbrutePRO pts in category: 4

1 hr   confidence:
Afterrun

Explanation:
as it is used on fuel fired heaters

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Note added at 2002-05-25 14:05:37 (GMT)
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Als known as Purge Cycle

 Theo BoseLocal time: 17:28Specializes in fieldNative speaker of: GermanPRO pts in category: 24

2 hrs   confidence:
shutoff delay or local lag time

Explanation:
'...has a local shutoff delay...' might work.

However, I find the 'nimmt in dieser Zeit x mA Strom' to be somewhat irritating. Typically, one would expect to see an 'auf' at the end of the sentence. The typical way to say something draws a current of x mA is 'XYZ nimmt einen Strom von 8 mA _auf_'.

Another scenario - is it possible the controller's reaction is somewhat delayed due to lag times in the process, or e.g. being the slave controller in a cascade control loop? This would explain the missing 'auf' in 'nimmt Strom' - nimmt as in 'uses (or outputs) a current of xx mA'.

 Klaus HerrmannGermanyLocal time: 00:28Specializes in fieldNative speaker of: GermanPRO pts in category: 330

3 hrs   confidence:
run-on o. run-on time/period

Explanation:
Would that work?
Confidence level low.

 Cilian O'TuamaLocal time: 00:28Works in fieldNative speaker of: EnglishPRO pts in category: 117

4 hrs   confidence:
a) overtravel b) overshoot c) coasting

Explanation:
a) VDE 06660, Part 201 (contact element)
b) IEC 337-2 (actuator)
b) ANSI C37.90
c) electric motors

 Mirjam6

5 hrs   confidence:
power down (operation)

Explanation:
John,

This suggestion comes from a personal glossary that I have been building over the past few years dealing with air bags and the associated technology. I do not have a particular reference that I can give you, but my list does NOT have a '?' after it, so I must have been reasonable certain of the meaning.

You can see if it fits your context.

Good luck.

 jccantrellUnited StatesLocal time: 15:28Specializes in fieldNative speaker of: EnglishPRO pts in category: 451

6 hrs   confidence:
overshoot time

Explanation:
As per Wyhlidal,with explicit reference to Steuergerät/control unit.

Transient response of the control system is an important quality of the system. It can be formulated in the time domain with properties of the unit step responses of the control system for the reference input signal or for the disturbances. Such properties are the overshoot and the settling time. (The settling time is defined as the time necessary to reach the steady value within 2-5 %.) Generally a small overshoot can be tolerated, but there are applications where aperiodic transients are
required.
A good approximation of the transient properties can be given also from system characteristics in the frequency domain. The overshoot defined in the time domain is related to the maximum amplitude of the closed loop frequency function, or to the phase margin calculated from the open loop frequency response. The settling time can be estimated from the cut-off frequency of the open loop.

overshoot: 1. In the transition of any parameter from one value to another, the transitory value of the parameter that exceeds
the final value. Note: Overshoot occurs when the transition is from a lower value to a higher value. When the transition is from
a higher value to a lower value, and the parameter takes a transitory value that is lower than the final value, the phenomenon is
called "undershoot." 2. The increased amplitude of a portion of a nonsinusoidal waveform, i.e., signal, at the output of a
nonlinear circuit, e.g., a realizable amplifier, caused by the characteristics of the circuit. (188). Note 1: Overshoot causes
distortion of the signal. Note 2: Overshoot may result from circuit design parameters that are intended to decrease the
response time of the circuit. Note 3: The amount of overshoot in a given circuit is designed to minimize response time while
maintaining distortion of the signal within acceptable limits. The absence or presence of overshoot, and if present, its magnitude, is a function of a circuit design parameter called "damping." See illustration under waveform. 3. The result of an
unusual atmospheric, e.g. , ionospheric, condition that causes microwave signals to be received where they are not intended.
http://www.its.bldrdoc.gov/fs-1037/dir-026/_3808.htm.

See if this works for you!

 Johanna Timm, PhDCanadaLocal time: 15:28Native speaker of: GermanPRO pts in category: 22
 Thanks to all. This seems the most likely in the (rather limited) context.

 May 17, 2010 - Changes made by Steffen Walter: Field (specific) (none) » Electronics / Elect Eng

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