Greenhouse temperature control with wooden pellet heater via model predictive control approach

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Abstract

This paper deals with the design of a temperature controller for a greenhouse using a wood pellet ]heating system. This heating system is carbon neutral; however it has three undesirable characteristics in control: 1) an On/Off control signal, 2) a longer time constant and 3) constraints on operation. The last property, in particular, is essential for achieving better fuel consumption and for achieving a longer lifetime of the heater. However the conventional PWM control also gives good control performance, the properties 1) and 2) block its effectiveness. In addition, the property 3) leads to performance degradation in the designed controller. To compensate for these effects, in this paper the model predictive control is applied to achieve the temperature control. The required specification is to keep the temperature error within 2 degrees Celsius in peak-to-peak with sufficient robustness for the parameter change in greenhouse. Experimental results in greenhouse give the effectiveness of proposed controller. Moreover the idea for computational load relaxation is also discussed.

Original languageEnglish
Title of host publication2012 20th Mediterranean Conference on Control and Automation, MED 2012 - Conference Proceedings
Pages1542-1547
Number of pages6
DOIs
Publication statusPublished - 2012
Event2012 20th Mediterranean Conference on Control and Automation, MED 2012 - Barcelona
Duration: 2012 Jul 32012 Jul 6

Other

Other2012 20th Mediterranean Conference on Control and Automation, MED 2012
CityBarcelona
Period12/7/312/7/6

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ASJC Scopus subject areas

  • Control and Systems Engineering

Cite this

Ito, K. (2012). Greenhouse temperature control with wooden pellet heater via model predictive control approach. In 2012 20th Mediterranean Conference on Control and Automation, MED 2012 - Conference Proceedings (pp. 1542-1547). [6265858] https://doi.org/10.1109/MED.2012.6265858