Servo Control System

Actuator, Sensor and Control loop electronics

Servo Control System

Servo systems combine individual elements into a control loop comprising of a driving transducer, a controller and a feedback system. A reference signal can then control anything from light output to mechanical position or pressure, or even another electrical signal, albeit usually power-amplified.

Servo systems are fairly easy to understand, in a general sense, as they are ubiquitous in human life. Each of us uses a servomechanism to control their limbs and many times we are the controller and feedback units of human-machine servo loop, such as is the case when driving a car.

We have extensive experience in designing and setting-up control units for electro-mechanical servo systems. The design usually consists of a complete or partial Proportional-Integral-Differential (PID) controller implemented in an analogue circuit. Digital versions can also be implemented using FPGAs or Microprocessors.

Set-up will usually involve careful manipulation of the proportions of the PID controller until a critically damped system is achieved.



Servo Loop
Analogue PID control
Digital PID control
Critically damped system