Acionare

Acționare, sometimes written as accionare in non-diacritic texts, refers to the act of causing a device or mechanism to operate. In engineering and automation, acționare describes the actuation process: the conversion of energy into controlled mechanical motion that drives a component or system.

An actuator is the device that performs actuation. Actuators receive a control signal and use energy from a power source to generate motion, force, or displacement. The term acționare distinguishes the mechanism that produces movement from the control logic that governs it. Actuation systems are embedded in a wide range of applications, from simple switches to complex robotic arms.

There are several principal types of actuators:

- Electric actuators, including direct current and servo or stepper motors, which provide precise control and fast response.

- Hydraulic actuators, which use fluid pressure to produce high force and stroke, suited for heavy lifting and linear motion.

- Pneumatic actuators, which use compressed air for fast, lightweight actuation and simple control.

- Mechanical actuators, relying on gears, springs, cams, or screws to convert energy into motion.

- Piezoelectric and other smart-material actuators, offering high precision and compact form factors for fine positioning.

Actuation can be powered by electricity, hydraulic fluid, compressed air, thermal energy, or mechanical energy. The choice depends on required force, speed, control accuracy, environmental conditions, and cost.

In control systems, acționarea is part of the broader actuation chain, which includes sensors, controllers, and drivers. Together, these components enable automated operations across industries such as manufacturing, robotics, automotive, and process control.