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A Microclimate Greenhouse Multivariable Control: A Guide to use Hardware in the Loop Simulation

Abstract:

The design of a Hardware-in-the-loop test for simulation and control of greenhouse microclimate is presented in this work. This test sets and tunes the MIMO controller system for achieving preferred greenhouse conditions. Firstly, a mathematical greenhouse model using differential equations to describe the dynamic aspects of the greenhouse climate and the interaction between the elements is presented. Next, the green-house is simulated with the software Simulink® MATLAB®. Then, the fundamental of the MIMO control system is described. Next, all the steps necessary to implement the MIMO controller in an Arduino system are shown. Finally, the MIMO controller built-in Arduino is tested by hardware in the loop simulation in the greenhouse model, keeping temperature and humidity as close as possible around a setpoint despite disturbances.