Patent ID: 8515581
Filing Date: 2013-08-20
Classification: C02F,G05B,G05D

Abstract:
1. A method for automatic dose control of one or more chemicals in a liquid treatment system, which comprises: inputting properties of a liquid measured on-line as input variables i into a predefined adaptation model to output an adaptation coefficient, wherein the adaption coefficient is calculated by equation wherein Y is the linguistic value of the adaptation coefficient, a i is an interaction coefficient of variables and X i is the linguistic value of input variables i, i=1 . . . n; inputting, into a feedback LE controller, an error for a property of the liquid (X where Y is a linguistic value and c i are tuning parameters i, i=1, 2, 3; modifying the control of an adaptive linguistic equation (LE) controller adaptively using the adaptation coefficient and the change of control, by multiplying the adaptation coefficient (Y) with the change of control (Y controlling the dosing of one or more chemicals to the liquid by said adaptive LE controller using said adaptive change of control, to output a dosage (y