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Abstract

An actuator can be defined [16, 15] as an energy converter which transforms energy from an external source into mechanical energy in a controllable way. The actuator input quantities depend on the type of energy used and can be chosen among all the quantities involved in the energy conversion from the energy source to the output mechanical quantities. For electromagnetic, piezoelectric and magnetostrictive actuators the input quantities can be the current, the charge or the voltage; for fluid power actuators the fluid pressure or the flow; for shape memory alloys and thermal expansion actuators the temperature. The output quantities are of mechanical nature. We will distinguish among (primary) output quantities (actuator force and stroke), and (derived) output quantities, which can be computed on the basis of the primary quantities. The most used derived output quantities are the actuator work and the actuator power.

Keywords

Shape Memory Alloy Piezoelectric Actuator Magnetic Circuit Hydraulic Actuator Ultrasonic Motor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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