Multi Sliding Mode Control with Residual Error Estimation for a Counter Flow Rotary Dryer
The difficulty of moisture and temperature control at the same time typically occurs in rotary dryers, resulting from the limitation of the humidity control rise tradeoff between moisture and temperature tracking. In this work, the multi sliding mode control was adopted to the mass and energy balance equations of a counter flow rotary dryer. By using the desired temperature as a virtual control law, desired water quantity could be obtained. Mass of dry solid was controlled by wet material feed rate and residence time. The system uncertainty and residual error were overcome by sliding gain margin and gain adaptation technique. By sequential control on the multi sliding surface, the simulation results showed good tracking of the output moisture with exhaust temperature in an acceptable range of the plant.
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Document Type: Research Article
Publication date: November 1, 2013
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