periodic perturbation

periodic perturbation

[¦pir·ē¦äd·ik pər·tər′bā·shən]
(astronomy)
Small deviations from the computed orbit of a planet or satellite; the deviations extend through cycles that generally do not exceed a century.
(mathematics)
A perturbation which is periodic as a function.
References in periodicals archive ?
The classical approach to the problem uses convex analysis (Rockafellar, 1970) to derive first-order conditions for improvement around an a priori known steady-state solution to the optimization problem using periodic perturbation.
The periodically inserted B zone (no-barrier zone) is regarded as the periodic perturbation in our modeling.
The role of periodic perturbation is critical (as we shall see below) in 'resetting' the 'evolutionary clock', and can lead - as with Mediterranean ecosystems - to alternating oscillations between degradation and regeneration over time.