Which type of system does a Servo-mechanism having step displacement form?

Which type of system does a Servo-mechanism having step displacement form? Correct Answer Type 1

Concept:

A servomechanism complies with the following:

• It is a feedback system
• It has a large energy gain
• The controlled output is a mechanical position or a derived time function of this position (speed, acceleration).
• A servomechanism is an automatic device that is used to correct the performance of a mechanism by means of error-sensing feedback.
• It’s used in automatic machine tools, satellite-tracking antennas, remote control airplanes, the automatic navigation system on boats and planes, missile launchers, and antiaircraft-gun control systems
• Many autofocus cameras, also use a servomechanism to accurately move the lens and thus adjust focus.

Key Points

For only type 1 system:

• If the input command is a step in position (constant displacement), the output will be a step in position (displacement) of almost same value.
• If the input command is a ramp in position (constant velocity), the output will be a ramp in position of precisely the same value (velocity), but lagged in position. So, for determining accurate position, ramp input is not suitable.