Design and implementation of a software of error simulation

Dissertant

Hbrahim, Maather A. al-Rahman

University

University of Technology

Faculty

-

Department

Department of Electrical Engineering

University Country

Iraq

Degree

Master

Degree Date

2004

English Abstract

One of essential problem for fault exploring is to study and analyze errors.

Therefore, the principles operation of inertial navigation system, guidance and control units in inertial navigation system have to be studied.

Also the physical meaning of inertial navigation system errors and the error propagation as function of time have to be analyzed.

Herein the thesis aims to build package for errors calculation and analysis.

Equations which describe errors are proven and programmed by using two methods, the first is classical, which deals with errors in stabilized platform control unit, the other is state-space which deals with errors in both stabilized platform and strap down control units.

The sources of input errors for the first method are: misalignment, initial position, initial velocity, gyro mass unbalance, gyro drift, accelerometer bias, and accelerometer scale factor.

All errors in x and y directions except misalignment and gyro drift in x, y and z directions.

Results from the first method analysis are displacement errors in x and y direction.

Results of the second method are errors of, latitude, longitude, north velocity, east velocity, north tilt, east tilt, and azimuth.

Package is built using Borland c in order to simulate errors, calculate them and plot their propagation with time, package specify normalized error value, vehicle velocity, expected flight time automatically and display them on the screen.

The package allows the user to change these values by a keyboard, and then the proposed algorithm calculates errors and displays values on the screen and plots the error propagation as function of time.

Also one of the package output is output files that contain results which represent displacement, position, tilt, and azimuth errors value.

Many tests are performed in order to evaluate package operation and validity, assuming different values for velocities, input errors, and test time.

The package results proven importance of error propagation knowledge that cause displacement, position, tilt, and azimuth errors in order to evaluate sensors and instruments which are used in building inertial navigation system.

Main Subjects

Electronic engineering

Topics

• Computer software

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-305793