time-invariant system
[/taɪm ɪnˈvɛriənt ˈsɪstəm/]
nounpl: time-invariant systems
sistema invariante no tempo
1. A system whose output does not depend on when an input is applied; if the input is delayed by a certain time, the output is delayed by the same amount without changing its form
A time-invariant system produces the same response regardless of when the input signal is applied to it.
Um sistema invariante no tempo produz a mesma resposta independentemente de quando o sinal de entrada é aplicado a ele.
2. In signal processing and control theory, a system whose behavior and characteristics do not change with time
Linear time-invariant systems are fundamental to classical control theory and signal processing.
Sistemas lineares invariantes no tempo são fundamentais para a teoria de controle clássico e processamento de sinais.
3. A system where the parameters and dynamics remain constant throughout the operation period
Most passive electronic circuits are time-invariant systems under normal operating conditions.
A maioria dos circuitos eletrônicos passivos são sistemas invariantes no tempo sob condições normais de operação.
This is a specialized technical term used primarily in engineering, physics, and mathematics education in both Brazil and the USA. It is fundamental to signal processing and control theory curricula at universities. The concept is culture-neutral and represents universal scientific principles taught identically across different countries. In Brazil, this terminology is standard in courses at UFRJ, USP, and other engineering schools, while in the USA it is core material in electrical engineering programs at MIT, Stanford, and similar institutions.
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