Dynamic Estimation and Compensation of Time Delay for Missiles with Strapdown Seeker

Wang, Yadong; He, Shaoming; Wang, Jiang; Lee, Chang-Hun

doi:10.2514/1.g006389

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…Lowcost IIR seekers also suffer from a time delay in LOS rate measurements, due to the inevitable time-constant delay of Focal Plane Array (FPA) detector measurements [1][2]. This delay results in degradation of vehicle's guidance performance [3]. Ref.…”

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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An Adaptive Fading CKF-Based Method for Estimating the Line of Sight Rate with Strapdown Seeker

Xia,

Fan,

Huang

et al. 2023

2023 China Automation Congress (CAC)

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Research on line of sight angular rate estimation of strapdown seeker

Wang¹,

Peng²,

Wang³

2022

Fifth International Conference on Mechatronics and Computer Technology Engineering (MCTE 2022)

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With the rapidly development of global military, missiles play an increasingly important role in modern war. The realization of precise guidance for missiles has become an important problem to be solved at present, and the seeker is an important equipment to realize precise guidance.The traditional gimbal seeker has many disadvantages such as large volume, high cost and complex structure, so the strapdown seeker appears. Although the strapdown seeker can effectively solve the problems above,there are problems such as high noise, attitude coupling, phase matching, etc.So, strapdown seeker requires higher estimation algorithm than traditional gimbal seeker. In order to improve the filtering accuracy, this paper adds an adaptive link to the unscented Kalman filter to form an adaptive unscented Kalman filter.Finally, through simulation and comparison, it is found that the filtering accuracy after adding adaptation is a little higher than that before adding adaptation.

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Dynamic Estimation and Compensation of Time Delay for Missiles with Strapdown Seeker

Cited by 3 publications

References 26 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

An Adaptive Fading CKF-Based Method for Estimating the Line of Sight Rate with Strapdown Seeker

Research on line of sight angular rate estimation of strapdown seeker

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