Apparatus and method for nonlinear process identification using orthonormal bases and ordinal splines in a process control system

摘要

A method includes receiving data associated with operation of an industrial process system. The method also includes identifying a model defining a behavior of the industrial process system using the data, an orthonormal bases function, and an ordinal spline bases function. The orthonormal bases function can be generated using estimated poles of the industrial process system. The ordinal spline bases function can be generated using a specified set of cubic splines. The ordinal spline bases function can also be generated using a distribution of knots and multiple ordinal spline functions associated with the knots. More knots can be associated with a more nonlinear portion of the industrial process system, and fewer knots can be associated with a less nonlinear portion or a linear portion of the industrial process system.

主权项

1. A computer-implemented method comprising:
storing, in one or more memories of at least one computing device, data comprising measurements of variables associated with an industrial process system; and identifying, with one or more processors of the at least one computing device, a model defining a behavior of the industrial process system using the data, an orthonormal bases function that captures process dynamics of the industrial process system, and an ordinal spline bases function that captures static nonlinearities of the industrial process system.