A kind of temperature and humidity adaptive predictive decoupling method in wireless greenhouse environmental test simulation system

In order to solve the strong coupling characteristic of the temperature and humidity in wireless greenhouse environmental simulation test system which is with nonlinear, big lag, strong coupling, time-varying characteristics and so on, this study proposed an adaptive prediction decoupling method based on dynamic matrix control algorithm. This method can effectively overcome the influence of control accuracy that is caused by serious loss of matching control model. In order to validate the effectiveness of the proposed algorithm and compared with PID control algorithm by simulation experiment. The each mode for heating and humidification was obtained by step response method and on the basis of the model, the PID and forecast decoupling simulation were obtained separately. The Simulation and experimental results show that the adaptive predictive decoupling algorithm can effectively weaken dynamic coupling between temperature and humidity and the control system performance was greatly improved. © 2013 Maxwell Scientific Organization.