27-07-2011, 03:18 PM
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Executive Summary
The problem presented to our team was to analyze and implement a controller on a off the shelf
antenna azimuth position control system. We analyzed the open loop and closed loop characteristics of
the system and determined the most stable and implementable controller for the system.
Our suggested solution to the presented problem is to implement a PID controller ahead of the Power
Amplifier but after the Preamplifier. This controller would be programmed with the values described in
the body of this report. This will allow for better stability and response times of the system described in
configuration three.
The implications of not implementing this controller are a non stable response to a step input with
configuration three; also the system may saturate components and cause damage to some or all of the
elements of the system. This could result in repair costs and replacement of components that can be
prevented.
given for the power amplifier and preamplifier are accurate
representations of the system currently in use.
3. The gain of the preamplifier is assumed to be 1 for simplification of analysis and any gain that
needed to be implemented will be in the compensator controller.
4. There are no disturbances or interferences in the signals sent between parts of the controller
system.
There are four parts to the original given problem statement. These are summarized below.
1. Determine the associated transfer functions of each of the five subsystems of the on market
system.
2. Find the system response to a step input with the feedback potentiometer disconnected.
3. Given the current configuration, design a purely proportional controller that achieves the
requested response characteristics.
4. Given the current configuration, design any type of controller to achieve the best system
response and stability and achieve the given response characteristics.
