Reduced Order Modeling & Controller Design for Mass Transfer in a Grain Storage System

Guha, Paramita and Mishra, Sunita (2015) Reduced Order Modeling & Controller Design for Mass Transfer in a Grain Storage System. International Journal of Automation and Computing, 11 (4). pp. 399-403. ISSN 1476-8186

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This paper considers the problem of simulating the humidity distributions of a grain storage system. The distributions are described by partial differential equations (PDE). It is quite difficult to obtain the humidity profiles from the PDE model. Hence, a discretization method is applied to obtain an equivalent ordinary differential equation model. However, after applying the discretization technique, the cost of solving the system increases as the size increases to a few thousands. It may be noted that after discretization, the degree of freedom of the system remain the same while the order increases. The large dynamic model is reduced using a proper orthogonal decomposition based technique and an equivalent model but of much reduced size is obtained. A controller based on optimal control theory is designed to obtain an input such that the output humidity reaches a desired profile and also its stability is analyzed. Numerical results are presented to show the validity of the reduced model and possible further extensions are identified.

Item Type: Article
Uncontrolled Keywords: Grain storage system; finite element method; modeling reduced order modeling; proper orthogonal decomposition; optimal control Lyapunov stability criteria
Subjects: CSIO > Agri - Instrumentation
Divisions: Agri - Instrumentation
Depositing User: Ms. Jyotsana
Date Deposited: 07 Mar 2017 16:02
Last Modified: 07 Mar 2017 16:02

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