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The purpose of this paper is to present an adaptive method based on fuzzy control for temperature control in the greenhouse. First of all, a mathematic model was constructed for the air temperature in the greenhouse. Then the corresponding fuzzy control system was implemented by using the Simulink tools of MATLAB. At last, fuzzy controller was realized using Visual Basic (VB) in the upper machine...
Greenhouse control systems need to achieve three targets at the same time: low cost, high stability and the ability to implement complex control algorithm. Therefore, an automatic data acquisition and control system was designed based on RS-485 protocol in this paper. The system has three layers: the bottom layer consists of sensors and actuators, the middle layer is comprised of I/O nodes and the...
Considering that main steam pressure of combustion system is a big-lagged, big-inertial and nonlinear object, the furnace radiation signals can rapidly reflect changes in combustion rate. A new controller based on the H∞ mixed sensitivity is applied as outer loop. By choosing proper weighting function, the MATLAB robust toolbox is used to obtain the H∞ optimal controller. Simulation...
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