What is the definition of a modulating actuator? A modulating actuator is an electromechanical device designed to control the movement of a machine component or system. It is able to adjust the output in small increments to achieve a desired position, velocity or acceleration. The most common type of modulating actuator is a linear actuator, which is a motor-driven device that moves a component or system in a straight line. Other types of modulating actuators include rotary actuators, which rotate a component or system around an axis, and pneumatic actuators, which use compressed air to move a component or system. All modulating actuators are capable of adjusting the output with a variety of control signals, such as voltage, current, resistance, and frequency. The most common type of controller used with modulating actuators is a micro-controller, which is a computer chip that can receive and interpret the control signals. Modulating actuators are used in a wide