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Scientia Silvae Sinicae ›› 2006, Vol. 42 ›› Issue (5): 104-109.doi: 10.11707/j.1001-7488.20060519

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Technique for Controlling Greenhouse Environment on Hierarchical Collaborative Structure

Chen Jian1,Jiang Yu1,2,Yang Guohui3   

  1. 1.College of Mechanical and Electrical Engineering, Northeast Forestry University Harbin150040;2.College of Information and Communication Engineering, Harbin Engineering University Harbin 150001;3.College of Electrical Engineering, Harbin Institute of Technology Harbin150001
  • Received:2005-11-02 Revised:1900-01-01 Online:2006-05-25 Published:2006-05-25

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Abstract:

Greenhouse environment is a complex and nonlinear system. Flat fuzzy rules adopted settle the problems of input and output for system, however, great number of rules result poor readability. Greenhouse environment model based on hierarchical collaborative structure(HCS) is presented. Hierarchical sub-fuzzy model of greenhouse environment was built on physical sub-model on environment variables. Experiments showed that the fuzzy algorithm of greenhouse environment on hierarchical collaborative structure had merits in reducing the number of rules, advancing readability for rules, lowing system cost and keeping pretty prediction accuracy.

Key words: hierarchical collaborative structure(HCS), fuzzy control, greenhouse environment