초록 ▼

An adaptive H∽industrial control system has a controller 21 controlling an industrial process 20 (ship, rolling mill, etc.), the state of which is measured (y). The controller and process outputs are fed to a parameter estimator 34 which estimates the operating polynomials (transfer functions or del

An adaptive H∽industrial control system has a controller 21 controlling an industrial process 20 (ship, rolling mill, etc.), the state of which is measured (y). The controller and process outputs are fed to a parameter estimator 34 which estimates the operating polynomials (transfer functions or delay operator functions) A, B, and C of the process. A controller design unit 35 processes the output of estimator 34 to produce coefficients for the controller 21, which implements a polynomial ratio Cn/Cd. The H∽algorithm is based on minimizing a “square of sum”form of function (Pcㆍu(t)+Fcㆍe(t))2, which results in equations which are easier to solve than those arising from the usual “sum of squares”form of function. A polynomial L=Pcn Fcd B-Fcn Pcd A is calculated, the unstable zeros L－are calculated, the matrix equations FAPcdl－ G=Pcn CF*z -n FBFcdl－ H=FcnCF*z -n are calculated, the extreme eigenvalue extracted, the corresponding eigenvector extracted, and Cn and Cd calculated as GFcd and HPcd for passing to the controller unit 21. Alternately, G and H can be calculated by an iterative convergent procedure. The parameters of Fc and Pc may be adjustable.

대표청구항 ▼

An industrial controller for controlling an industrial process, comprising: a controller unit for receiving a reference signal and the output of the industrial process; a parameter estimator fed with an output of the controller unit and the output of the industrial process for producing estimated po

An industrial controller for controlling an industrial process, comprising: a controller unit for receiving a reference signal and the output of the industrial process; a parameter estimator fed with an output of the controller unit and the output of the industrial process for producing estimated polynomial functions A, B and C which are polynomial functions indicative of said process in the ARMA model; and a controller design unit to which the estimated polynomial functions A, B and C are fed and which feeds the controller unit with coefficients for implementing a polynomial ratio control function Cn/Cd the controller design unit comprising: means for storing two polynomial ratio functions Fc (=Fcn/Fcd) and Pc (=Pcn/Pcd); means for calculating a polynomial function (Pcn Fcd B-Fcn Pcd A)=L, and unstable zero functions L－thereof; means for determining polynomials F, G and H by solving the matrix equations F A Pcd l－G=Pcn C F* z-n F B Fcd l－H=Fcn C F* z-n where F* is the adjoint of F, and ln as G Fcd and Cd as H Pcd respectively.