Actuation

Actuation is the process of creating movement in a machine or device. It happens when a system receives an input and turns it into a physical action. That action may push, pull, turn, open, close, lock, release, or move a part into a certain position.

An actuator creates this movement. Actuators can use electrical, hydraulic, pneumatic, or other energy sources. The energy is changed into motion that allows the device to perform a task.

In an electromagnetic system, actuation often starts with a wire coil. When electrical current flows through the coil, it creates a magnetic field. That magnetic field can move a metal plunger, armature, or similar part. When the current stops, a spring or another mechanical force may return the moving part to its original position.

Solenoid coils are often used for this type of actuation. These coils may be used in valves, switches, locks, release systems, and other devices.

The required force and travel depend on the system design. Factors can include voltage, current, coil size, resistance, stroke length, air gap, and duty cycle.

Actuation is common in industrial equipment, vehicles, medical devices, aerospace systems, security equipment, and automated machines. In each case, it lets an electrical or control signal create useful physical movement.