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22052

Trajectory Modeling of GRAD Rocket with Low-Cost Terminal Guidance Upgrade Coupled to Range Increase Through Step-Like Thrust-Curves

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Last updated: 04 Jan 2025

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Abstract

The paper shows a full 6 DOF modeling for a GRAD rocket in Earth's non-inertial frame. For numerical purposes the modeling is limited to flat Earth approximation. The full motion equations are shown and all terms are explained together with the aerodynamics parameters for the entire flight envelope. Non-linear interpolation is used for a erodynamic coefficients and their derivatives. We present the typical dispersion factors due to rocket production inaccuracies, launch condition variability and atmospheric factors and their relative influence on a guidance implementation package. Next we present a 6 DOF modeling with various step-like thrust-curves while maintain the same total impulse delivered by the original motor. The influence of the step size on the range of the GRAD rocket is investigated together with the dispersion influence. We show that significant range increase can be obtained while using the same propulsion unit with a steplike thrust-curve modification. We also investigate the influence of the step-like thrust-curve on dispersion of such a rocket and the technological possibilities to implement our solution.
In the last part of the paper we present a terminal guidance concept 122 mm rockets. A preliminary requirement for IMU units to be used for terminal guidance is shown together with the general guidance algorithm for several trajectories. Performance expectations are shown through the analysis of the IMU units performance as well as flight dynamics of the
122 mm rockets.

DOI

10.21608/asat.2013.22052

Keywords

unguided, Rocket, guidance, terminal, thrust, range, dispersion, interpolation, numerical, Simulation, inertial

Authors

First Name

Florin

Last Name

Mingireanu

MiddleName

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Affiliation

Research Scientist, Romanian Space Agency (ROSA) , Address: Str. Mendeleev, Nr. 21- 25, Bucharest, 010362, Romania.

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Volume

15

Article Issue

AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 15 – May 28 - 30, 2013

Related Issue

4183

Issue Date

2013-05-01

Receive Date

2018-12-16

Publish Date

2013-05-01

Page Start

1

Page End

12

Print ISSN

2090-0678

Online ISSN

2636-364X

Link

https://asat.journals.ekb.eg/article_22052.html

Detail API

https://asat.journals.ekb.eg/service?article_code=22052

Order

21

Type

Original Article

Type Code

737

Publication Type

Journal

Publication Title

International Conference on Aerospace Sciences and Aviation Technology

Publication Link

https://asat.journals.ekb.eg/

MainTitle

Trajectory Modeling of GRAD Rocket with Low-Cost Terminal Guidance Upgrade Coupled to Range Increase Through Step-Like Thrust-Curves

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Type

Article

Created At

22 Jan 2023