A complete description of the development and initial evaluation of the Strapdown Inertial Reference Unit (SIRU) system is reported. System development documents the system mechanization with the analytic formulation for fault detection and isolation processing structure; the hardware redundancy design and the individual modularity features; the computational structure and facilities; and the initial subsystem evaluation results.

SIRU development. Volume 1: System development

Flight test results of the strapdown inertial reference unit (SIRU) navigation system are presented. The fault-tolerant SIRU navigation system features a redundant inertial sensor unit and dual computers. System software provides for detection and isolation of inertial sensor failures and continued operation in the event of failures. Flight test results include assessments of the system's navigational performance and fault tolerance.

https://ntrs.nasa.gov/api/citations/19770019167/downloads/19770019167.pdf

R. J. Hruby

Papers

Flight test results of the Strapdown hexad Inertial Reference Unit (SIRU). Volume 1: Flight test summary