Modeling, Analysis, and State Feedback Control Design of a Multizone HVAC System
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Almahdi Abdo-Allah, tariq iqbal, Kevin Pope
Abstract
A HVAC system is modeled by applying a state space MIMO (multi-input/multioutput) system method for control system design and analysis. Thermal models are developed using the simulation program IDA Indoor Climate and Energy. The building has four floors in total, with separate air-handling units (AHUs) on each floor. The system's eight main input data are hot water and the energy usage for each AHU, while the eight main outputs are return airflow temperature and CO<jats:sub>2</jats:sub> levels for AHUs. The factors of wind direction and velocity are also applied as disturbances. By comparing usage data on simulated power consumption versus measured data for the three months of October, November, and December 2016, good agreement was achieved with simulated data. The main aim is to develop a state feedback controller and then apply it toward optimal functionality of a control system. After utilizing the MATLAB identification toolbox, a MIMO system-based state space model is developed.
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