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This paper present a nonlinear state space model of a typical carriage for demand controlled ventilation (DCV).a novel Direct feedback linear (DFL) control method of controlling CO2 concentration in carriage is introduced to linearize model of DCV system. Then a linear inputñoutput model is obtained. Simulation comparison between the performance of conventional PID and the novel DFL method is made...
VAV systems attempt to reduce building energy consumption while maintaining the primary role of air conditioning. A state space model of variable air volume (VAV) air-conditioning system is developed. It is found that the dynamic model is formulated as a MIMO bilinear and coupling system. To obtain good control performance, a novel decoupling control method, direct feedback linear (DFL) is applied...
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