The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 2013
Filed:
Apr. 14, 2010
Cary Lee Cover, Warwick, MD (US);
Sean Scott Stroud, Wilmington, DE (US);
Michael Joseph Piovoso, Wilmington, DE (US);
Timothy James Kelly, Boulder, CO (US);
Cary Lee Cover, Warwick, MD (US);
Sean Scott Stroud, Wilmington, DE (US);
Michael Joseph Piovoso, Wilmington, DE (US);
Timothy James Kelly, Boulder, CO (US);
Alliant Techsystems Inc., Arlington, VA (US);
Abstract
A propulsion thrust control system and method for controlling thrust in a rocket motor includes configuring valves of an energized rocket motor to an initial total valve area according to a total thrust command. The total thrust command is converted into a commanded propellant mass flow discharge rate. A varying total valve area is computed from an error between the commanded propellant mass flow discharge rate and a calculated propellant mass flow discharge rate. The valves are reconfigured according to a distribution of the varying total valve area. The propulsion system includes a pressure vessel with valves and a controller for regulating the valve area according to a propellant mass flow discharge rate from the pressure vessel.