ADAPTIVE TEMPERATURE CONTROL IN GREENHOUSES BASED ON MULTIRATE-OUTPUT CONTROLLERS

摘要

A new technique is presented, for adaptive temperature control of greenhouses, whose parameters vary with the ventilation as well as the velocity of the inside air. The proposed technique relies on multirate detection of the greenhousetemperature. And results on a globally stable indirect adaptive scheme, which estimates the unknown process parameters on-line, from sequential data of the greenhouse temperature and the heating power, which are recursively updated within the time limitimposed by a fundamental sampling period. The effectiveness of the proposed technique is demonstrated by several simulation results.