Title:
METHOD FOR COMPENSATING OF SOFT IRON MAGNETIC DISTURBANCES IN HEADING REFERENCE SYSTEM
Document Type and Number:
Japanese Patent JP2017181515
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To consecutively maintain a correct heading in heading reference systems such as aircraft heading reference systems, integrated standby units, or vehicle inertial systems.SOLUTION: A method and system, which compensate for significant soft iron magnetic disturbances, are configured to: when a difference to be calculated in value between a gyro compass heading relative to magnetic north and a magnetometer reading during a measurement period exceeds a prescribed acceptable threshold value of a change based on an expected drift of the gyro compass over the period, give a heading correction signal to a heading reference system; and upon receipt of the heading correction signal, with the gyro compass heading adjusted, maintain an accurate heading relative to true magnetic north, in which, when this threshold value is not exceeded, the magnetometer reading is used as a heading value. This method is repeatedly conducted to consecutively maintain the correct heading. Further, this method may be employed relative to each heading measurement axis.SELECTED DRAWING: Figure 1
Inventors:
ASKARPOUR SHAHRAM
Application Number:
JP2017100957A
Publication Date:
October 05, 2017
Filing Date:
May 22, 2017
Export Citation:
Assignee:
INNOVATIVE SOLUTIONS & SUPPORT INC
International Classes:
G01C17/38
Domestic Patent References:
| JPS62160317U | 1987-10-12 | |||
| JP2002090150A | 2002-03-27 | |||
| JPH0749240A | 1995-02-21 |
Attorney, Agent or Firm:
Shintaro Nogawa
Shinji Kai
Yusuke Kaneko
Kiyoshi Inamoto
Masami Tomita
Shinji Kai
Yusuke Kaneko
Kiyoshi Inamoto
Masami Tomita
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