Title:
METHOD AND DEVICE FOR DECREASING NUTATION OF EARTHLY REVOLVING ORBIT SPACESHIP, PITCH MOMENTUM THEREOF IS BIASED
Document Type and Number:
Japanese Patent JPS57144198
Kind Code:
A
Abstract:
A system for actively damping nutation of a satellite and/or aligning the pitch axis of a momentum bias satellite with some external reference includes a magnetic torquing means which is energized with currents of appropriate polarity and magnitude to effect the necessary torque to reduce nutation. A roll sensor produces signals proportional to the roll error of the satellite. A control signal is generated a predetermined time period after the roll error exceeds a predetermined threshold. The predetermined time period is a fraction x of the nutation period tn of the satellite or x+n(tn) where n is an integer.
Inventors:
RUUDOUITSUGU RUUMUFUERUDA
KEBIN JIYON FUIRITSUPUSU
SUCHIIBUN RESURI BURASUNIKU
KEBIN JIYON FUIRITSUPUSU
SUCHIIBUN RESURI BURASUNIKU
Application Number:
JP823682A
Publication Date:
September 06, 1982
Filing Date:
January 20, 1982
Export Citation:
Assignee:
RCA CORP
International Classes:
B64G1/32; B64G1/36; B64G1/38; G05D1/08; (IPC1-7): B64G1/32
Domestic Patent References:
| JPS5630882A | 1981-03-28 | |||
| JPS5213300A | 1977-02-01 |