Method for thermal modeling and updating of bias errors in inert

Details Method for thermal modeling and updating of bias errors in inert Method for thermal modeling and updating of bias errors in inert

1994-07-27

1996-10-29

Voeltz, Emanuel T.

Boots, shoes, and leggings

36457102, 364453, 364578, 388902, G01C 1934

Patent

active

055703046

ABSTRACT:
A method for thermal modeling and updating of bias errors in inertial navigation instrument outputs relies upon piecewise cubic spline encoding of data. The temperature range of the thermal model is divided into contiguous intervals of equal length. Instrument bias-versus-temperature data is encoded on an interval-by-interval basis with all intervals normalized so that cubic polynomials of identical form may be fitted between boundary intervals defined by function values and slopes. Instrument bias error at a measured temperature is estimated in the field and an update point (bias, temperature) established. The particular interval is located and the thermal model is re-fit accordingly in the region of the relevant interval. The spline parameters are then adjusted to accommodate the estimated bias error thereby updating the instrument thermal model of bias.

REFERENCES:
patent: 4144769 (1979-03-01), Mayer
patent: 4314174 (1982-02-01), Wing et al.
patent: 4651576 (1987-03-01), Luke
patent: 4675820 (1987-06-01), Smith et al.
patent: 4823626 (1989-04-01), Hartmann et al.
patent: 5416585 (1995-05-01), Hadeler
Article --John W. Diesel, "Calibration of a Ring Laser Gyro Inertial Navigation System For Minimum Velocity Error" Fourteenth Biennial Guidance Test Symposium, vol. II, Oct. 3-5, 1989, pp. 1-1 through 1-20.
Article --John Mark, Daniel Tazartes and Timothy Hilby, "Fast Orthogonal Calibration of a Ring Laser Strapdown System," Proceedings of the Symposium of Gyro Technology, Stuttgart, Germany (Sep. 1986).

Affiliated with

Also associated with

Rating

Method for thermal modeling and updating of bias errors in inert does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for thermal modeling and updating of bias errors in inert, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for thermal modeling and updating of bias errors in inert will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1790340