Analysis of Spin-Rate Property for Dual-Spin-Stabilized Projectiles with Canards

Chang, Sijiang; Wang, Zhongyuan; Tiezheng, Liu

doi:10.2514/1.a32830

Cited by 22 publications

(17 citation statements)

References 7 publications

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“…Traditional Trajectory Correction Scheme. Equation (12) is adopted to relate the predictive impact point deviation with canards control phase and amplitude, and the control start time is set as the trajectory apex time [11][12][13][14][15].…”

Section: Results and Discussion For Guided Mortar Projectiles Withmentioning

confidence: 99%

“…Firing accuracy of the guided projectiles can be dramatically improved by outfitting with a suitable trajectory correction system. The commonly used tools are impulse thrusters [1][2][3], inertial loads [4,5], drag brakes [6,7], fixed canards [8][9][10], and moveable canards [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The guidance usually starts from the trajectory correction apex time to reduce drag penalties early in flight in the studies of guided projectiles with canards [11][12][13][14][15]; however, this trajectory correction scheme cannot get the max trajectory correction capability of canards according to our analysis.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of Trajectory Correction Scheme for Guided Mortar Projectiles

Zhang¹,

Gao²,

Yang³

et al. 2015

International Journal of Aerospace Engineering

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Guidance with traditional trajectory correction scheme usually starts from the trajectory apex time to reduce drag penalties early in flight; however, this method cannot get the max trajectory correction capability of canards according to our analysis. This paper presents an optimized trajectory correction scheme by taking different control phases of canards in ballistic ascending segment and ballistic descending segment. Simulation indicates that the optimized trajectory correction can improve the trajectory correction capability greatly. The result of an example trajectory and Monte Carlo simulations with the predictive guidance law and the trajectory tracking guidance law testifies the effectiveness of the optimized trajectory correction scheme. 6-DOF Trajectory ModelThe mortar projectile configuration used in this study is a representative 120 mm mortar projectile, 0.9 m long, finstabilized. The initial velocity is 280 m/s; the projectile weight, mass center location from the nose tip, roll inertia, and pitch

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Section: Results and Discussion For Guided Mortar Projectiles Withmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of Trajectory Correction Scheme for Guided Mortar Projectiles

Zhang¹,

Gao²,

Yang³

et al. 2015

International Journal of Aerospace Engineering

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show abstract

“…At present, a canard-guided dual-spinning projectile [1][2][3][4][5][6][7][8][9][10][11] has been converted to a controlled spinning projectile with great development potential. It can be used for continuous control to realize precision strikes.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Dual-Spinning Projectile with Canard and Trajectory Filtering

Guan

2018

International Journal of Aerospace Engineering

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The article establishes a seven-degree-of-freedom projectile trajectory model for a new type of spinning projectile. Based on this model, a numerical analysis is performed on the ballistic characteristics of the projectile, and the trajectory of the dual-spinning projectile is filtered with the unscented Kalman filter algorithm, so that the measurement information of projectile onboard equipment is more accurate and more reliable measurement data are provided for the guidance system. The numerical simulation indicates that the dual-spinning projectile is mainly different from the traditional spinning projectile in that a degree of freedom is added in the direction of the axis of the projectile, the forebody of the projectile spins at a low speed or even holds still to improve the control precision of the projectile control system, while the afterbody spins at a high speed maintaining the gyroscopic stability of the projectile. The trajectory filtering performed according to the unscented Kalman filter algorithm can improve the accuracy of measurement data and eliminate the measurement error effectively, so as to obtain more accurate and reliable measurement data.

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“…To maintain flight stability, large caliber spin-stabilized projectiles are launched with high spin rate, usually 150-300 r/s [1]. High coupling between yaw and pitch flight dynamics makes the cost-effective guidance of spin-stabilized projectile a complex task [2].…”

Section: Introductionmentioning

confidence: 99%

Swerving Orientation of Spin-Stabilized Projectile for Fixed-Cant Canard Control Input

Shen

2015

Mathematical Problems in Engineering

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Due to the large launch overload and high spin rate of spin-stabilized projectile, no attitude sensor is adopted in square crossing fixed-cant canard concept, which causes the lack of existing projectile linear theory for the close form solution of swerving motion. This work focuses on swerving orientation prediction with the restricted conditions. By importing the mathematical models of canard force and moment into the projectile angular motion equations, trim angle induced by canard control force is extracted as the analytical solution of angle of attack increment (AOAI). On this basis, analytical orientations of trajectory angular rate increment and swerving increment are obtained via the frozen coefficient method. A series of simulations under different conditions were implemented to validate the expressions in this effort. Results state that increment orientation of swerving motion can be predicted with available trajectory parameters. The analytical orientations indicate trim value of numerical orientations. Deviations between analytical and numerical orientations relate to initial launch angles and control start time, both lower initial launch angle, and the start time which is closer to the end of flight decreases the deviation convergence time.

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Analysis of Spin-Rate Property for Dual-Spin-Stabilized Projectiles with Canards

Cited by 22 publications

References 7 publications

Optimization of Trajectory Correction Scheme for Guided Mortar Projectiles

Optimization of Trajectory Correction Scheme for Guided Mortar Projectiles

Modeling of Dual-Spinning Projectile with Canard and Trajectory Filtering

Swerving Orientation of Spin-Stabilized Projectile for Fixed-Cant Canard Control Input

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