Actuation may refer to: *

High Redundancy Actuation High-redundancy actuation (HRA) is a new approach to fault-tolerant control in the area of mechanical actuation. Overview The basic idea is to use a lot of small actuation elements, so that a fault of one element has only a minor effect on the over ...

(HRA), a new approach to fault tolerant control in the area of mechanical actuation *

Variable valve actuation In internal combustion engines, variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with varia ...

, any mechanism or method that can alter the shape or timing of a valve lift event within an internal combustion engine *Actuation, a type of self-realization referred to in Aristotle's philosophy of entelechy.

See also