The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Optimal control method of greenhouse temperature aimed at disturbances in the greenhouse environment system was proposed. Design a disturbance observer at first. In this section the focus was mainly on the selection of Q filter's parameters. Then design a quadratic optimal output tracker on the basis of disturbance observer. Finally simulate and verify the designed optimal controller based on a simplified...
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...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.