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

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.

[Imaneky]

Hi,

Have you find a solution to your problem?

I am trying to implement an MPC for a bang-bang control output.

Thank you!

Answer 1

[Ryan G]

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.

Answer 2

[Azzi Abdelmalek]

pass your input signal through a zoh (zero order hold) block from simulink/discret. or set your signal source datype to logical