A New Baseline for the Inertial Navigation Strapdown Simulator Program. Volume 1. Introduction and Summary
Abstract
This four-volume report describes an updated and expanded version of a direct, digital, modular simulation of a strapdown inertial navigation system employing a wander-azimuth computational frame, and subject to a six degree of freedom random vibration environment. The original version of this simulation was developed under Task 4.2.3(a) of the above contract during 1975 and 1976. The user may simulate not only the gross dynamics of the flight profile (from an external or internal profile generation) but also the angular and linear random vibrations resulting from gusts and turbulence acting on the airframe. The total environment is applied to the models of the inertial components (laser or SDR gyros and pendulous accelerometers). The resulting outputs of simulated IMU are summed in an interface module and compensated and scaled in the simulated navigation computer. The latter also contains the velocity/attitude algorithm, which computes the body-to-inertial transformation, using either the direction cosine matrix or quaternion, and the navigation algorithm which numerically integrates the specific forces after transformation to the local vertical, wander azimuth computational frame. The outputs of the simulated navigation computer are the computed position, velocity, and attitude of the vehicle with respect to a local vertical, north pointing frame. The flight profile and the differences between it and the simulated navigation computer outputs are tabulated in an evaluation module for printing, plotting, or post processing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1978
- Accession Number
- ADA062807
Entities
People
- Darold Riegsecker
- John Prohaska
- Roy Nurse
Organizations
- Charles Stark Draper Laboratory