A
system
A system is a group of Interaction, interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment (systems), environment, is described by its boundaries, ...
is said to be transient or in a transient state when a process variable or variables have been changed and the system has not yet reached a
steady state. The time taken for the circuit to change from one steady state to another steady state is called the transient time.
Examples
Chemical Engineering
When a
chemical reactor is being brought into operation, the concentrations, temperatures, species compositions, and reaction rates are changing with time until operation reaches its nominal process variables.
Electrical engineering
When a
switch is flipped in an appropriate electrical circuit containing a
capacitor or
inductor, the component draws out the resulting change in voltage or current (respectively), causing the system to take a substantial amount of time to reach a new
steady state.
We can define a transient by saying that when a quantity is at rest or in uniform motion and a change in time takes place , changing the existing state , a transient has taken place.
When a SCR (four-layer PNPN Device) is switched on we have the problem of transients occurring as a result of high values of current and voltage oscillating around the point before normal levels are obtained again. Filtering can prevent damage to SCR by means of LC filters, zener diodes, trans-zorps, and varistors.
[Industrial Electronics N3 , J Kraft]
See also
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Attractor
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Carrying capacity
The carrying capacity of an environment is the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available. The carrying capacity is defined as t ...
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Control theory
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Dynamical system
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Ecological footprint
The ecological footprint is a method promoted by the Global Footprint Network to measure human demand on natural capital, i.e. the quantity of nature it takes to support people or an economy. It tracks this demand through an ecological accounti ...
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Economic growth
Economic growth can be defined as the increase or improvement in the inflation-adjusted market value of the goods and services produced by an economy in a financial year. Statisticians conventionally measure such growth as the percent rate of ...
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Engine test stand
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Equilibrium point
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List of types of equilibrium
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Evolutionary economics
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Growth curve
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Herman Daly
Herman Edward Daly (July 21, 1938 – October 28, 2022) was an American ecological and Georgist economist and professor at the School of Public Policy of University of Maryland, College Park in the United States, best known for his time as a s ...
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Homeostasis
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Lead-lag compensator
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Limit cycle
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Limits to Growth
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Population dynamics
Population dynamics is the type of mathematics used to model and study the size and age composition of populations as dynamical systems.
History
Population dynamics has traditionally been the dominant branch of mathematical biology, which has ...
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Race condition
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Simulation
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State function
In the thermodynamics of equilibrium, a state function, function of state, or point function for a thermodynamic system is a mathematical function relating several state variables or state quantities (that describe equilibrium states of a system ...
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Steady state
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Steady state economy
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Steady State theory
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Systems theory
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Thermodynamic equilibrium
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Transient modelling
Transient modelling is a way of looking at a process with the primary criterion of time, observing the pattern of changes in the subject being studied over time. Its obverse is Steady state, where you might know only the starting and ending figures ...
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Transient response
References
Chemical process engineering
Electrical engineering
Systems theory
Control theory
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