A Guidance Law with a Switching Logic for Maintaining Seeker's Lock-on for Stationary Targets

Sang, Daekyu; Ryoo, Chang-Kyung; Tahk, Min-Jea

doi:10.5139/ijass.2008.9.2.087

Cited by 6 publications

(2 citation statements)

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“…Bryson and Ho [8] solved a simple rendezvous problem, where they minimized a cost function including the position and the velocity component but not the impact angle. An OGL with impact angle control for a constant-speed missile was investigated in references [9,10]. Sang et al [11] proposed an impact angle control guidance law based on Lyapunov stability theory and a parameter optimization method.…”

Section: Introductionmentioning

confidence: 99%

Optimal guidance law and control of impact angle for the kinetic kill vehicle

Cai

2011

Proceedings of the Institution of Mechanical Engineers, Part G:

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In order to increase the effectiveness of the kinetic kill vehicle (KKV), control of impact angle is required in the terminal engagement. The purpose of this research is to achieve an optimal guidance law (OGL) with a specified impact angle as well as zero terminal miss distance. An energy OGL based on a simplified mathematical model to achieve the performance of the KKV is presented. Numerical simulation is used to analyse the performance of the guidance law. The results show that the proposed law has higher accuracy, larger capture zone, and lesser energy consumption than the conventional proportional navigation guidance laws. Moreover, the influence of the initial heading angle is discussed, and the capture zone of both the initial heading angle and the terminal impact angle are given.

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Section: Introductionmentioning

confidence: 99%

Optimal guidance law and control of impact angle for the kinetic kill vehicle

Cai

2011

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Daekyu Sang [11] proposed a guidance law switching logic between an original law such as PNG and a guidance law which makes the look angle constant during the homing phase at a predefined FOV limit. The above two instances are limited to a target that stands still.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Guidance Law for a Strapdown Seeker to Maintain Lock-on Conditions against High Speed Targets

Lee¹,

Hyun²,

Lee³

et al. 2013

Journal of Electrical Engineering and Technology

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-This paper proposes a new guidance law, which considers the Field of View (FOV) of the seeker when a missile has a strapdown seeker mounted instead of a gimbal seeker. When a strapdown seeker, which has a narrow FOV, is used for tracking a target, the FOV of the seeker is an important consideration for guidance performance metrics such as miss distance. We propose a new guidance law called hybrid guidance (HG) to address the shortcomings of conventional guidance laws such as proportional navigation guidance (PNG), which cannot maintain lock-on conditions against high speed targets due to the narrow FOV of the strapdown seeker. The aim of the HG law is to null miss distance and to maintain the look angle within the FOV of the strapdown seeker. In order to achieve this goal, we combine two guidance laws in the HG law. One is a PNG law to null the LOS rate, and the other is a sliding mode guidance (SMG) law derived to keep the look angle within the FOV by employing a Lyapunov-like function with a sliding mode control methodology. We also propose a method to switch these two guidance laws at certain look angles for better guidance performance.

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