Method for the fuel-optimized selection of a thruster configuration
AssigneeEADS Astrium GmbH
InventorsHorst-Dieter Fischer, Joachim Chemnitz
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Abstract
The invention describes a method for the fuel-optimized selection of a configuration of thrusters on a spacecraft while resolving a linear optimization problem with an initialization phase for finding a first permissible solution and a subsequent iteration phase, in which proceeding on the permissible solution an iterative optimization of an efficiency criterion takes place. In each iteration step a scaled iteration gradient is formed, and the iteration gradient is multiplied with a limiting factor for a maximum iteration step width, which is formed while taking at least one boundary value condition for a permissible solution into account.
Claims24
A method for selecting a solution to a linear optimization problem for fuel-optimized selection of a configuration of thrusters on a spacecraft comprising:
- finding a first permissible calculation of said solution in an initialization phase;
- and
- performing an iterative optimization of an effectiveness criterion in a subsequent iteration phase, said subsequent iteration phase having at least one iteration and providing a subsequent permissible calculation of said solution;
- wherein a scaled iteration gradient is formed with said at least one iteration, and
- wherein said scaled iteration gradient is multiplied with a limiting factor for a maximum iteration interval width, said maximum iteration interval width being formed while taking at least one boundary value condition for said subsequent permissible solution into account.
A method for selecting a solution to a linear optimization problem for fuel-optimized selection of a configuration of thrusters on a spacecraft comprising:
- producing an initial result of said solution;
- and
- calculating, in at least one iteration, a subsequent result of said solution by optimization of an efficiency criterion.
A method for selecting a solution to a linear optimization problem for fuel-optimized selection of a configuration of thrusters on a spacecraft comprising:
- finding a first permissible calculation of said solution in an initialization phase;
- performing an iterative optimization of an effectiveness criterion in a subsequent iteration phase, said subsequent iteration phase having at least one iteration and providing a subsequent permissible calculation of said solution;
- and
- using said solution to carry out said fuel-optimized selection of said configuration of thrusters on said spacecraft;
- wherein a scaled iteration gradient is formed with said at least one iteration, and
- wherein said scaled iteration gradient is multiplied with a limiting factor for a maximum iteration interval width, said maximum iteration interval width being formed while taking at least one boundary value condition for said subsequent permissible solution into account.
A method for selecting a solution to a linear optimization problem for fuel-optimized selection of a configuration of thrusters on a spacecraft comprising:
- producing an initial result of said solution;
- calculating, in at least one iteration, a subsequent result of said solution by optimization of an efficiency criterion;
- and
- using said solution to carry out said fuel-optimized selection of said configuration of thrusters on said spacecraft.
An apparatus for selecting a solution to a linear optimization problem for fuel-optimized selection of a configuration of thrusters on a spacecraft comprising:
- means for finding a first permissible calculation of said solution in an initialization phase;
- and
- means for performing an iterative optimization of an effectiveness criterion in a subsequent iteration phase, said subsequent iteration phase having at least one iteration and providing a subsequent permissible calculation of said solution;
- wherein a scaled iteration gradient is formed with said at least one iteration, and
- wherein said scaled iteration gradient is multiplied with a limiting factor for a maximum iteration interval width, said maximum iteration interval width being formed while taking at least one boundary value condition for said subsequent permissible solution into account.
A system for selecting a solution to a linear optimization problem for fuel-optimized selection of a configuration of thrusters on a spacecraft comprising:
- means for producing an initial result of said solution;
- and
- means for calculating, in at least one iteration, a subsequent result of said solution by optimization of an efficiency criterion.
Dependencies are inferred from the claim text.