Patent ID: 7494263
Filing Date: 2009-02-24
Classification: B01F,E21B,G05D,Y10T

Abstract:
1. A control system for mixing at least two materials in a physical system having two or more tanks, comprising: at least two actuators, each actuator being operable to introduce a material into a first tank to form a first mixture, the first mixture flowing into a second tank to form a second mixture; and a controller operable, based on a commanded input, to control the at least two actuators to obtain a density of either the first mixture or the second mixture and a volume flow rate of the second mixture out of the second tank; wherein the density is controlled independently from the volume flow rate, and wherein the commanded input comprises: a commanded combined volume flow rate of the materials passing through the actuators into the first tank [commanded dv a commanded combined mass flow rate of the materials passing through the actuators into the first tank [commanded dm