Title :
New approach to coarse alignment
Author :
Schimelevich, Leonid ; Naor, R.
Author_Institution :
Israel Aircraft Ind. Ltd., Israel
Abstract :
Two different methods for coarse alignment are discussed. One of them (direct method) utilizes both accelerometers and gyros output for continuously tracking attitude estimation while the other (gyrocompassing) utilizes gyro outputs for continuously tracking attitude system and accelerometers for attitude estimation. The standard approach is gyrocompassing in spite of the fact that it is not always the most accurate. The rule for selecting an appropriate algorithm is obtained. Our approach is based on DCM instead of Euler angles estimation, a fact which allows us to solve the nonlinear problem
Keywords :
accelerometers; aircraft navigation; attitude control; gyroscopes; inertial navigation; matrix algebra; tracking; accelerometers; attitude control; attitude estimation; coarse alignment; direct method; gyrocompassing; gyros output; matrix algebra; tracking; Acceleration; Accelerometers; Aerospace industry; Aircraft; Azimuth; Earth; Gravity; Instruments; Least squares approximation; Sensor phenomena and characterization;
Conference_Titel :
Position Location and Navigation Symposium, 1996., IEEE 1996
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3085-4
DOI :
10.1109/PLANS.1996.509095
