Accession Number : ADP003624

Title :   Modular Strapdown Guidance Unit with Embedded Microprocessors,

Corporate Author : CHARLES STARK DRAPER LAB INC CAMBRIDGE MA

Personal Author(s) : Gilmore,J. P.

Report Date : APR 1984

Pagination or Media Count : 16

Abstract : The Low-Cost Inertial Guidance System (LCIGS) is a modular strapdown design implementation of attitude (gyro) and velocity (accelerometer) axes which permits the interchangeable use of different manufacturer's instruments without affecting the system's electronic or mechanical interfaces or processing software. This design flexibility is made possible by the use of microprocessors for processing and control. The microprocessors effect on-line digital torque control of the gyros, active instrument error model compensation, including modeling for temperature sensitivity effects, temperature control, self-testing, etc. Adaptation of processing and calibration algorithms to accommodate for instrument changes or sensed environmental variations is achieved through the use of an alterable read-only data base that may be updated by the LCIGS support equipment as required at calibrations or upon an instrument replacement.

Descriptors :   *Inertial guidance, *Gyroscopes, *Strapped down systems, *Microprocessors, Accelerometers, Modular construction, Thermal stability, Errors, Computer programs

Distribution Statement : APPROVED FOR PUBLIC RELEASE