A Composite Guidance Law for Suppressing Measurement Noise of LOS Angular Rate

Feng, Chen; He, Guangjun; He, Qi

doi:10.1155/2019/7453602

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…In [14], a finite-time-convergent disturbance observer (FCDO), based on the sliding mode observer, has been designed to effectively track the ideal LOS rate and suppress the measurement noise. To overcome the limitations of SMC, including primarily chattering, the theory of higher order sliding modes (HOSM) and especially second order sliding modes (SOSM) has been developed in [15].…”

Section: Introductionmentioning

confidence: 99%

A new two-step robust strategy for estimating the line of sight rate of optical seekers having time delay

Karimi,

Mohammadnejad,

Babaie

2024

Preprint

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The current research is dedicated to line-of-sight rate estimation for a pitch-yaw gimballed imaging infrared seeker mechanism. The line of sight rate estimation problem has a highly nonlinear dynamic that is affected by various error sources such as measurement noise, significant coupling of vehicle channels, and time-delayed seeker detector measurements along with unknown target maneuvers. In order to consider these error sources, a new line-of-sight rate estimation approach is proposed via a two-step strategy. In the first step, an adaptive discrete-time super-twisting observer with an arbitrary convergence time approach is proposed that estimates line of sight rate, in presence of all errors except the delay. In the second step, a delay compensator is presented based on Super-Twisting Observer method to compensate the seeker delay. To increase the estimation accuracy, nonlinear dynamic equations are used and the simulations are implemented to a Software-In the-Loop test bed. The superiority of proposed approach is approved via various simulations and comparison with previously presented methods.

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Section: Introductionmentioning

confidence: 99%

A new two-step robust strategy for estimating the line of sight rate of optical seekers having time delay

Karimi,

Mohammadnejad,

Babaie

2024

Preprint

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“…Therefore, we usually design suitable LOS rate extraction schemes to obtain the guidance information. The commonly used extraction schemes are direct extraction methods [7], filtering estimation methods [8,9] and tracking differentiator estimation methods [10,11]. The common feature of these methods is that the seeker can always track the real target.…”

Section: Introductionmentioning

confidence: 99%

Line-of-sight rates extraction of roll-pitch seeker under anti-infrared decoy state

Li²,

Xia

2021

J. of Syst. Eng. Electron.

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In this paper, the method of extracting guidance information such as the line-of-sight (LOS) rates under the anti-infrared decoy state for the roll-pitch seeker is researched. Coordinate systems which are used to describe the angles transform are defined. The LOS angles reconstruction model of the roll-pitch seeker in inertial space is established. A Kalman filter model for extracting LOS rates of the roll-pitch seeker is proposed. In this model, the target performs constant acceleration (CA) model maneuvers. The error model of LOS rates extraction under infrared decoy state is established. Several existing methods of extracting LOS rates under anti-infrared decoy state are listed in this paper. Different from the existing methods, a novel method that uses extrapolated values of target accelerations as filter measurements is proposed to solve the guidance information extraction problem under the anti-infrared decoy state. Numerical simulations are conducted to verify the effectiveness of the proposed method under different target maneuvering models such as the CA model, the CA extended model and the singer model. The simulation results show that the proposed method of extracting guidance information such as LOS rates for the rollpitch seeker under the anti-infrared decoy state is effective.

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A Composite Guidance Law for Suppressing Measurement Noise of LOS Angular Rate

Cited by 2 publications

References 23 publications

A new two-step robust strategy for estimating the line of sight rate of optical seekers having time delay

A new two-step robust strategy for estimating the line of sight rate of optical seekers having time delay

Line-of-sight rates extraction of roll-pitch seeker under anti-infrared decoy state

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