Constrained Predictive Control of a Greenhouse

A scheme for temperature control of a greenhouse is proposed. The present work proposes an approach based on a combination of two different control schemes: Feedback Linearization (FL) and standard linear Model Predictive Control (MPC), using their advantages. The treated greenhouse is considered a nonlinear Single-Input Single-Output process and subjected to strong external disturbances. Since the methodology used for solving the MPC+FL approaches generally leads to an optimization problem subjected to state-dependent nonlinear constraints, an alternative for its implementation is discussed. Two control techniques are compared, namely; MPC+FL and Nonlinear Model Predictive Control (NLMPC). Copyright IFAC 2000