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How can I modify the manipulated variable properties in a MPC block in Simulink?

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Steve
Steve 2012-10-16
评论： Imaneky 2018-10-16
I'm developing the MPC controller for ventilator.
Plant model consist of 3 inputs and 1 output.
Three inputs are ventilator on/off(manipulated variable), occupancy sch. (measured disturbance 1) and outdoor co2 (measured disturbance 2).
One output is indoor co2 (measured output).
I want to control the ventiltor to only the on/off (0, 1).
I set the minimum and maximum constraints of manipulated variable(vantiltor on/off), It is 0 and 1 respectively.
And I set the max down rate and max up rate. it is -1 and 1 respectively.
However, the calculated result of manipulated variable include values between 0 and 1.
How could I fix this problem?
Thanks.

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回答（2 个）

Ryan G
Ryan G 2012-10-16
I don't know if I would normally use a MPC control for a bang-bang (on/off) control scheme, but then again I'm not really that familiar with MPC.
Try using a quantizer on the output and set the interval to 1.
Azzi Abdelmalek
Azzi Abdelmalek 2012-10-16
编辑：Azzi Abdelmalek 2012-10-16
pass your input signal through a zoh (zero order hold) block from simulink/discret. or set your signal source datype to logical

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