Title:
OFF-LINE ATTITUDE DECIDING METHOD AND DEVICE FOR ARTIFICIAL SATELLITE
Document Type and Number:
Japanese Patent JP3386433
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an attitude deciding device for restraining the degradation of estimation accuracy of an attitude angle estimating signal generated from an off-line attitude deciding device even when a star unobserving state is continuously generated.
SOLUTION: This off-line attitude deciding device of an artificial satellite generates a Go-Back attitude angle estimating signal 14 after performing a weighting leveling operation in a Go-Back filter computing element 13 on an attitude angle Go estimating signal 11 generated from a Go filter 20 being a conventional sequential Kalman filter computing element 6 and an attitude angle Back estimating signal 12 generated in a Back filter 21 composed of an inverse time sequential Kalman filter computing element 9 as shwon in a drawing 1. The Back filter 21 for performing an inverse time Kalman filter operation is combined with the Go filter 20 being an ordinary sequential Kalman filter to restrain the degradation of accuracy to the attitude angle estimating signal generated in the star unobserving state.
Inventors:
Toshiaki Yamashita
Application Number:
JP2000063731A
Publication Date:
March 17, 2003
Filing Date:
March 08, 2000
Export Citation:
Assignee:
NEC
International Classes:
G01C21/02; B64G1/24; G01C15/00; (IPC1-7): B64G1/24; G01C15/00; G01C21/02
Domestic Patent References:
| JP6341299A | ||||
| JP11227698A | ||||
| JP11355221A |
Attorney, Agent or Firm:
Yasuo Suzuki (1 person outside)