| US 7,494,263 B2 | ||
| Control system design for a mixing system with multiple inputs | ||
| Jason D. Dykstra, Duncan, Okla. (US); and Justin A. Borgstadt, Duncan, Okla. (US) | ||
| Assigned to Halliburton Energy Services, Inc., Duncan, Okla. (US) | ||
| Filed on May 03, 2005, as Appl. No. 11/121,278. | ||
| Claims priority of provisional application 60/671392, filed on Apr. 14, 2005. | ||
| Prior Publication US 2006/0233039 A1, Oct. 19, 2006 | ||
| Int. Cl. B28C 7/04 (2006.01) | ||
| U.S. Cl. 366—17 [366/152.1; 366/153.1; 137/88; 700/285] | 34 Claims |
| 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 dvin/dt]; and
a commanded combined mass flow rate of the materials passing through the actuators into the first tank [commanded dmin/dt].
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