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Open AccessArticle

Adaptive Estimation and Cooperative Guidance for Active Aircraft Defense in Stochastic Scenario

by Feng Fang 1, Yuanli Cai 1,* and Zhenhua Yu 2
1
School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2
School of Information and Navigation, Air Force Engineering University, Xi’an 710077, China
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(4), 979; https://doi.org/10.3390/s19040979
Received: 24 November 2018 / Revised: 1 February 2019 / Accepted: 20 February 2019 / Published: 25 February 2019
(This article belongs to the Special Issue Aerospace Sensors and Multisensor Systems)
The active aircraft defense problem is investigated for the stochastic scenario wherein a defending missile (or a defender) is employed to protect a target aircraft from an attacking missile whose pursuit guidance strategy is unknown. For the purpose of identifying the guidance strategy, the static multiple model estimator (sMME) based on the square-root cubature Kalman filter is proposed, and each model represents a potential attacking missile guidance strategy. Furthermore, an estimation enhancement approach is provided by using pseudo-measurement. For each model in the sMME, the model-matched cooperative guidance laws for the target and defender are derived by formulating the active defense problem as a constrained linear quadratic problem, where an accurate defensive interception and the minimum evasion miss distance are both considered. The proposed adaptive cooperative guidance laws are the result of mixing the model-matched optimal cooperative guidance laws in the criterion of maximum a posteriori probability in the framework of the sMME. By adopting the adaptive cooperative guidance laws, the target can facilitate the defender’s interception with the attacking missile with less control effort. Also, simulation results show that the proposed guidance laws increase the probability of successful target protection in the stochastic scenario compared with other defensive guidance laws. View Full-Text
Keywords: adaptive cooperative guidance; multiple model adaptive estimator; square-root cubature Kalman filter; estimation enhancement; active defense adaptive cooperative guidance; multiple model adaptive estimator; square-root cubature Kalman filter; estimation enhancement; active defense
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Fang, F.; Cai, Y.; Yu, Z. Adaptive Estimation and Cooperative Guidance for Active Aircraft Defense in Stochastic Scenario. Sensors 2019, 19, 979.

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