Linear Actuator is considered as a device that turns energy into linear motion. People can actually meet such device at much stuff every day. The most common power for providing movement of such kind of actuator can be electricity or hydraulic. Linear Actuators that are available today include several types and here are some of them. Mechanical actuator is one kind of linear actuator that is used widely as it is repeatable and having low cost. It even does not require any power source. Other common type is the electro-mechanical actuator which is also cheap, but it has quite high wear and tear rate.
Actuator type that is also used by many people is linear motor due to its high speed and simple design. Other type is pneumatic cylinder and has several benefits, like it is very strong, having simple design, and having high speed.