FLIR/INS/RA Integrated Landing Guidance for Landing on Aircraft Carrier

Ding, Zhenxing; Li, Kui; Yu, Mengsun; Wang, Lingcao

doi:10.5772/60142

Cited by 8 publications

(6 citation statements)

References 18 publications

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“…500 million pounds of fungicides are applied worldwide annually [1]. The term fungicide refers to either chemicals or biological agents that inhibit the growth of fungi or fungal spores [2]. Over time, numerous substances employed as fungicides have a wide and diverse chemical structural spectrum, covering both inorganic and organic substances [3].…”

Section: Introductionmentioning

confidence: 99%

“…This fact does not only focus on inorganic fungicides but also organic fungicides are under review. For example, vinclozolin has been removed from use for damage to human health and several fungicides are known to cause developmental toxicity and oncogenesis [2,4]. Today, the main role of modern fungicides is the inhibition of fungi growth and/or fungal spores (i.e., they do not kill fungi).…”

Section: Introductionmentioning

confidence: 99%

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The Benefits of the ZnO/Clay Composite Formation as a Promising Antifungal Coating for Paint Applications

Lucas-Gil

Menéndez²,

Pascual

et al. 2020

Applied Sciences

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Featured Application: Herein, we provide an inorganic composite as a paint preservative for antifungal applications. From a paint commercial additive, we add synthesized ZnO nanoparticles in order to improve the antimicrobial response. The main aim of this study is to generate a cost-efficient, eco-friendly material, without human health risk. We have developed a method for the controlled dispersion of ZnO nanoparticles on paint additive through a cooperative assembly-directed process at room temperature. The antifungal response of the inorganic composite is tested against the common fungi, Aspergillus niger. In this work we take a step further, studying the composite developed in a paint application. We believe that this paper can serve as a turning point in the search of alternative preservatives against fungi in different environments from industrial to hospital. Abstract:The presence of mold is a serious problem in different environments as industrial, agricultural, hospital and household, especially for human health. Large quantities of mold spores can potentially cause allergic reactions and respiratory problems. Therefore, it is essential to keep buildings free of fungi without harming human health and the environment. Here, we pose a composite of modified bentonite clay and ZnO nanoparticles as an alternative antifungal preservative. The new composite is obtained by an easy and eco-friendly method based on a dry nanodispersion, without altering the properties of each material. The antifungal test reveals a robust response against fungi thanks to the ZnO nanoparticles' contribution. Our results reveal that the antifungal activity of ZnO/clay composite is governed by both a uniform distribution and an adequate concentration of the ZnO nanoparticles onto the clay surface. Specifically, we find that for concentration below 10 wt.% of the ZnO nanoparticles, the nanoparticles are well dispersed onto clay giving rise to an excellent antifungal response. By contrast, when the concentration of ZnO increases, the formation of ZnO agglomerates onto the clay surface is favored. This effect provokes that antifungal behavior changes towards a more moderate improvement. Finally, we have demonstrated that this composite can be used as a promising paint preservative for antifungal applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Benefits of the ZnO/Clay Composite Formation as a Promising Antifungal Coating for Paint Applications

Lucas-Gil

Menéndez²,

Pascual

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

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“…The carrier is detected in the image by a warped patch of a reference image. Ding et al [13] presented a FLIR/INS/RA integrated landing guidance approach to estimate the aircraft states and carrier dynamics for fixed-wing aircraft landing on the deck in low-visibility weather and high sea states by employing the Newton iterative algorithm, Kalman filter and wavelet transform. Jia et al [14] put forward a carrier landing algorithm based on point and line features for fixed-wing UAVs.…”

Section: Introductionmentioning

confidence: 99%

Infrared-Inertial Navigation for Commercial Aircraft Precision Landing in Low Visibility and GPS-Denied Environments

Zhang

Zhai²,

He³

et al. 2019

Sensors

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This paper proposes a novel infrared-inertial navigation method for the precise landing of commercial aircraft in low visibility and Global Position System (GPS)-denied environments. Within a Square-root Unscented Kalman Filter (SR_UKF), inertial measurement unit (IMU) data, forward-looking infrared (FLIR) images and airport geo-information are integrated to estimate the position, velocity and attitude of the aircraft during landing. Homography between the synthetic image and the real image which implicates the camera pose deviations is created as vision measurement. To accurately extract real runway features, the current results of runway detection are used as the prior knowledge for the next frame detection. To avoid possible homography decomposition solutions, it is directly converted to a vector and fed to the SR_UKF. Moreover, the proposed navigation system is proven to be observable by nonlinear observability analysis. Last but not least, a general aircraft was elaborately equipped with vision and inertial sensors to collect flight data for algorithm verification. The experimental results have demonstrated that the proposed method could be used for the precise landing of commercial aircraft in low visibility and GPS-denied environments.

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“…11,12 However, the methods mentioned above cannot estimate the ship motion, and their results can potentially be improved for greater accuracy. Ding et al 13 estimated the ship motion using Newton's iterative algorithm, but there is still room for improvement in terms of accuracy and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Research on the visual/inertial integrated carrier landing guidance algorithm

Wang

Ding

2018

International Journal of Advanced Robotic Systems

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In this article, we describe a visual/inertial integrated carrier landing guidance algorithm for aircraft carrier landing operations. The airborne vision system and the inertial navigation system are employed as sensors to obtain feature points of carrier runway as well as the aircraft inertial measurements. In this algorithm, visual and inertial information are integrated, and the Pose from Orthographic Projection and Scaling with Iterations algorithm is utilized to estimate aircraft position and carrier motion. A simulation was constructed validating this algorithm, and the results of this simulation show satisfactory accuracy as well as high efficiency in carrier landing guidance.

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FLIR/INS/RA Integrated Landing Guidance for Landing on Aircraft Carrier

Cited by 8 publications

References 18 publications

The Benefits of the ZnO/Clay Composite Formation as a Promising Antifungal Coating for Paint Applications

The Benefits of the ZnO/Clay Composite Formation as a Promising Antifungal Coating for Paint Applications

Infrared-Inertial Navigation for Commercial Aircraft Precision Landing in Low Visibility and GPS-Denied Environments

Research on the visual/inertial integrated carrier landing guidance algorithm

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