Patent ID: 9069345
Filing Date: 2015-06-30
Classification: G05B

Abstract:
1. A computer-implemented method for controlling a batch-type manufacturing process with a finite duration, the method comprising: receiving dependent variable data and manipulated variable data associated with the batch-type manufacturing process, the dependent variable data including measured past and present values of a first set of process parameters observed by one or more sensors, the manipulated variable data including measured past and present values of a second set of process parameters measured from a plurality of process tools, wherein the first set of process parameters, representative of dependent variables, and the second set of process parameters, representative of manipulated variables, are X-type variables in the batch-type manufacturing process; determining, using a multivariate model of the manufacturing process, one or more multivariate statistics based on at least the dependent variable data and the manipulated variable data, wherein each multivariate statistic, which comprises a Hotelling value, a residual standard deviation value, a principal component score or a partial least squares component score, measures a deviation of the batch-type manufacturing process from a multivariate space of normal process behavior; determining future values of the manipulated variables by optimizing an objective function that comprises J=θ adjusting at least one of the second set of process parameters based on the future values of the manipulated variables.