Define sensor, signal conditioner, controller and actuator in mechatronic system.

Define sensor, signal conditioner, controller and actuator in mechatronic system.
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Sensor: - A sensor is an element in a measurements system that acquires a physical parameter and changes it into electrical signal. E.g. Bellows, Thermocouple 

Signal Conditioners:- The signal conditioner performs isolation, impedance matching, noise reduction, amplification, conversion of sensor output signal. 

Actuators:- Actuators are the process of conversion of energy to mechanical form. 

Controllers:- Controllers are the brains of control system operation and decide the kind of action taken in response to an error

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