In Flight Projectile Impact Point Prediction

Hainz, Leonard C.; Costello, Mark

doi:10.2514/6.2004-4711

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…The Impact Point Prediction (IPP) method is used as a feedback loop to generate guidance commands to correct trajectory during the error correction phase of rocket flight [12,28,37,38]. The IPP routine is evaluated during the error correction phase after every 0.1 s, making it is a suitable compromise between guidance computation burden and required miss-distance precision.…”

Section: Impact Point Predictionmentioning

confidence: 99%

Range and Accuracy Improvement of Artillery Rocket Using Fixed Canards Trajectory Correction Fuze

Raza

Wang

2022

Aerospace

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This paper presents a two-phase guidance and control algorithm to extend the range and improve the impact point accuracy of a 122-mm rocket using a fixed canards trajectory correction fuze. The guidance algorithm consists of a unique glide and correction phase of the rocket trajectory that is activated after the flight’s apex. The glide phase operates in an open-loop configuration where guidance commands are generated to increase the range of the rocket. In contrast, the correction phase operates in a closed-loop configuration where the Impact Point Prediction method based on Modified Projectile Linear Theory is used as a feedback channel to correct the range and drift errors. The proposed fixed canards trajectory correction fuze has a simple and reliable single channel roll-orientation control configuration. The rocket trajectory model consists of a 7-DOF non-linear dynamic model of a dual-spin rocket configuration with a fixed canards correction fuze mounted at the nose. A Monte Carlo simulation of the rocket’s inertial and launch point perturbations show that the fixed canards fuze with the proposed guidance algorithm can double the range of the rocket without changing the rocket motor thrust-time curve. At the same time, the rocket’s accuracy can also be improved beyond the results of an unguided rocket.

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Section: Impact Point Predictionmentioning

confidence: 99%