Adam Smith's The Invisible Hand: The Feedback Structure of Markets. From Sterman JD Business Dynamics p170 Fig 5-26. A price-mediated resource allocation system..
A simple model of a PID controller, controlling a valve refilling a leaky water tank.
In the scenario, at T=10 minutes, a faucet is opened for one minute, draining the tank. There's also a constant amount of leakage from the tank at all times.
The best way to play with the PID controller parameters is to click "Simulate", then click on the "map pin"-shaped icon on the simulation results, which will link the graphs to the model. Without closing the graphs, one can now drag the parameter sliders and see the graphs change.
A simple model of a PID controller, controlling a valve refilling a leaky water tank.
In the scenario, at T=10 minutes, a faucet is opened for one minute, draining the tank. There's also a constant amount of leakage from the tank at all times.
The best way to play with the PID controller parameters is to click "Simulate", then click on the "map pin"-shaped icon on the simulation results, which will link the graphs to the model. Without closing the graphs, one can now drag the parameter sliders and see the graphs change.
WIP based on Emery Roe (2023) When Complex is as Simple as it Gets: Guide for Recasting Policy and Management in the Anthropocene, IDS Working Paper 589, Brighton: Institute of Development Studies and blog
