In today’s introduction to control system design, consider the following:

The plant: my body. The perturbation: COVID infection. The controller: my brain, addled and mostly absent. The output value: body temperature. The input: a function changing over time whose value is how much ibuprofen to take when.

Constraint: maximize body temperature to recruit fever as an ally, but limit it to a max of 103F.

Tentative hypothesis: take half pill (100mg) every two hours.