aikavakioisissa

Aikavakioisissa is the inessive plural form of the Finnish adjective aikavakioinen and is used to describe phenomena, systems, or conditions that are governed by a time constant. The term is common in technical Finnish, especially in physics, electrical engineering, and control theory, where dynamics are often analyzed in terms of a characteristic time scale.

Etymology and form: aikavakioinen is formed from aika (time) and vakio (constant) with the adjectival suffix -inen. Inflection to the inessive plural yields aikavakioisissa, used with plural nouns in phrases such as aikavakioisissa järjestelmissä (in time-constant systems) or aikavakioisissa oloissa (under time-constant conditions). The form signals that the described properties pertain to systems whose behavior is dominated by a time constant, typically denoted by tau.

Usage and meaning: In practice, aikavakioisissa conveys that the analyzed dynamics can be approximated or understood through a fixed time constant. It is often paired with nouns like järjestelmissä, vaste, mittauksissa, or olosuhteissa to specify the context—such as in RC circuits, first-order lag models, or other dynamic processes where the response follows an exponential approach with the time constant.

Examples: Aikavakioisissa järjestelmissä vaste on eksponentiaalinen. Mittaukset tehtiin aikavakioisissa oloissa.

See also: aikavakioinen, aika, vakio, järjestelmä, dynaaminen järjestelmä.