How does the PID control matrix work?
Written by Paul Cracknell
Updated at July 17th, 2024
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The control matrix combines, rescales, and redistributes the input signal to the two independent PID controllers, FIR filters or digital filters. The output vector is the product of the control matrix multiplied by the input vector.
For instance, in this configuration, the two inputs are DC signals of 50 mV and 150 mV.
Since the first row of the Control matrix is [1, 2], the ChannelA output of the Control matrix is calculated as 1× InA + 2 × InB = 350 mV.
The second row of the Control matrix is [-1, 1], so the ChannelB output of the Control matrix is calculated as -1 × InA + 1 × InB = 100 mV.
