Orbit attitude control device, and method of controlling orbit attitude

Patent metadata

Field	Value
Publication number	US-9365300-B2
Application number	US-201314018683-A
Country	US
Kind code	B2
Filing date	Sep 5, 2013
Priority date	Nov 28, 2012
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

An orbit attitude control device includes a plurality of nozzles for injecting combustion gas supplied from a combustion chamber, and a control section configured to calculate nozzle opening degree correction values so that a deviation between a detection value of the pressure of the combustion chamber and a command value becomes smaller. The control section is configured to calculate a total correction value so that the deviation between the detection value and the command values becomes smaller. A total value T 1 for first group nozzles and a total value T 2 for second group nozzles are calculated. The total correction value is distributed to the opening degree correction values for the first group nozzles with a ratio of T 2 /(T 1 +T 2 ) and to the opening degree correction values for the second group nozzles with a ratio of T 1 /(T 1 +T 2 ).

First claim

What is claimed is:

1. An orbit attitude control device, comprising:
a plurality of nozzles configured to inject combustion gas supplied from a combustion chamber, in which opening degrees are configured to be controlled in accordance with opening degree command values; and
a control section configured to calculate nozzle opening degree correction values that are correction values for opening degree command values so that a deviation between a detection value of a pressure of the combustion chamber and a command value of the pressure becomes smaller to correct the opening degree command values by the nozzle opening degree correction values,
wherein first group nozzles which belong to a first group of the plurality of nozzles are configured to inject combustion gas in opposite directions along a first axis, a second group nozzles which belong to a second group of the plurality of nozzles are configured to inject combustion gas in opposite directions along a second axis,
wherein the control section is configured to:
calculate a total correction value that is a correction value for a total of the opening degree command values for the plurality of nozzles so that the deviation between the detection value of the pressure and the command value of the pressure becomes smaller;
calculate a total first group opening degree value T 1 that is a total of the opening degree command values for the first group nozzles, and a total second group opening degree value T 2 that is a total of the opening degree command values for the second group nozzles;
distribute the total correction value into a first group opening degree correction value with a ratio of T 2 /(T 1 +T 2 ) and into a second group opening degree correction value with a ratio of T 1 /(T 1 +T 2 );
calculate the nozzle opening degree correction values for the first group nozzles so that a total value becomes the first group opening degree correction value; and
calculate the nozzle opening degree correction values for the second group nozzles so that a total value becomes the second group opening degree correction value.

2. The orbit attitude control device according to claim 1 , wherein the control section is configured to:
calculate the nozzle opening degree correction values for the first group nozzles, by distributing the first group opening degree correction value to the each of the first group nozzles in proportion to each of the opening degree command values; and
calculate the nozzle opening degree correction values for the second group nozzles, by distributing the second group opening degree correction value to the each of the second group nozzles in proportion to each of the opening degree command values.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Fujita Toshiharu
• Hayakawa Nobuaki

Classifications

• B64G1/26 Primary

  using jets · CPC title

• B64G1/244

  Spacecraft control systems · CPC title

• G05D1/0883

  Physics · mapped topic

• B64G1/242

  Orbits and trajectories · CPC title