1. Introduction to digital system control
The general structure of a closed-loop system, corrected using a digital computer, is shown in figure 1 .
—The analog-to-digital converter (ADC) converts the error ε (t ) between input and output into a digital value, and samples this error every T seconds.
—The digital computer reads the digital error value, stores it in memory and, using an algorithm, generates a digital control signal u (kT ).
—This signal is then transformed by a digital-to-analog converter (DAC) into a DC signal v (t ).
This signal v (t ) is usually amplified by a power amplifier and applied to the physical system to be controlled.
It should also be noted that the D/A converter must deliver...
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Introduction to digital system control
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