Closed-Form Solution of Line-of-Sight Trajectory for Nonmaneuvering Targets

Jalali-Naini, Seyed Hamid; Esfahanian, Vahid

doi:10.2514/2.4532

Cited by 11 publications

(3 citation statements)

References 4 publications

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“…Only simple cases are solved analytically in closed-form for three-point guidance, e.g. as treated in [21,22] for a case of idealized LOS trajectory.…”

Section: Introductionmentioning

confidence: 99%

First-Order Optimal Line-of-Sight Guidance for Stationary Targets

Hesam

Hamid

2016

Scientia Iranica

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Abstract. In this paper, a closed-loop optimal line-of-sight guidance law for rst-order control systems is derived for stationary targets. The problem is solved for the onedimensional case using normalized equations to obtain normalized guidance gains and performance curves. Three sets of normalized equations are introduced and discussed using di erent normalizing factors. The performances of the guidance laws are compared in normalized forms with zero-lag optimal guidance and a rst-order optimal scheme with steady-state gains using a second-order control system. Normalized miss distance analysis shows that the miss distance of the rst-order guidance law is smaller than the two mentioned schemes for small total ight times.

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“…Only simple cases are solved analytically in closed-form for three-point guidance, e.g. as treated in [21,22] for a case of idealized LOS trajectory.…”

Section: Introductionmentioning

confidence: 99%

First-Order Optimal Line-of-Sight Guidance for Stationary Targets

Hesam

Hamid

2016

Scientia Iranica

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“…With the phenomenal growth of highly manoeuvrable targets, research on improved guidance laws is continuing [1][2][3][4][5][6]. In recent years, many authors have addressed the importance of the command-to-line-of-sight (CLOS) guidance law due to the recent advances in beam-pointing technology [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Guidance Law Design Using Intelligent Non-Linear Controller

Elhalwagy

2009

International Conference on Aerospace Sciences and Aviation Tec

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A sliding mode control algorithm combined with a fuzzy control scheme is developed for the trajectory control of a command guidance system. The acceleration command input is obtained. The proposed controller is used to compensate for the influence of unmodeled dynamics and to alleviate chattering. Simulation results show that the proposed controller gives good system performance in the face of system parameters variation and external disturbances. Moreover, the simulation results show the effectiveness of the proposed missile guidance law against different engagement scenarios.

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“…In addition, Macfadzean 10) claimed that there is no closed-form solution for LOS trajectory, even with simplifying assumptions such as those made by Locke. In 2000, Jalali-Naini and Esfahanian 4) claimed a closed-form solution for LOS trajectory for non-maneuvering targets. In 2001, Shoucri 15) showed that some scattered published results in the guidance theory field were similar to the generalized proportional navigation (GPN) guidance law.…”

Section: Introductionmentioning

confidence: 99%

Analytical Study of CLOS Guidance Law against Head-on High-Speed Maneuvering Targets

Chao¹,

Lee

Soong³

2007

Trans. Japan Soc. Aero. S Sci.

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A command to line-of-sight (CLOS) guidance law is developed against head-on high-speed maneuvering targets. Preliminary studies have shown that the aspect angle of the interceptor at lock-on near 180 deg is a fundamental requirement for achieving small miss distance against a very high-speed incoming target. The solutions of missile trajectory obtained before under this guidance scheme seemed tedious and incomplete. Now, in this study, exact and complete solutions which are more general and comprehensive than those obtained before are derived for head-on high-speed maneuvering targets. Some related important characteristics such as lateral acceleration demand and normalized missile acceleration are investigated and discussed. Additionally, illustrated examples of target maneuvering are introduced to easily describe the trajectory of the target. The results obtained in this study are very significant and practical, and will be useful in actual application.

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Closed-Form Solution of Line-of-Sight Trajectory for Nonmaneuvering Targets

Cited by 11 publications

References 4 publications

First-Order Optimal Line-of-Sight Guidance for Stationary Targets

First-Order Optimal Line-of-Sight Guidance for Stationary Targets

Guidance Law Design Using Intelligent Non-Linear Controller

Analytical Study of CLOS Guidance Law against Head-on High-Speed Maneuvering Targets

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