Education and demonstration – Science – Physics
Reexamination Certificate
1999-04-19
2001-09-18
Rovnak, John Edmund (Department: 3713)
Education and demonstration
Science
Physics
C244S172200, C060S200100
Reexamination Certificate
active
06290505
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to flight simulation of rocket motors by interpolating between various values of known data on a computer to derive good approximations of the thrust-versus-time characteristics of motors for ambient conditions under which they have not been tested.
2. The Prior Art
Rocket/Missile flight simulation requires the thrust-versus-time profile of a rocket motor conditioned to a specific temperature. Sometimes the preferred simulation is with an average performance motor and other times it is with a statistically high or low ballistic performance. Actual rocket motor performance data is usually generated at the specification temperature extremes during lot acceptance testing with very little data available at ambient temperature, where most of the flight simulations are conducted. Additionally, rocket motor ballistic traces are typically confidential which makes getting and transferring them a tedious process.
SUMMARY OF THE INVENTION
The inventor has discovered how to calculate very rapidly the predicted thrust-versus-time profile of a rocket motor by assuming that the general shape of a profile is standard over a wide range of tests, and calculating the entire profile by calculating a few points on the profile, then stretching or shrinking the profile along its axes to force the general profile to fit the few calculated points.
Homer Mark
Rovnak John Edmund
The United States of America as represented by the Secretary of
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