Robust Method to Detect and Track the Runway during Aircraft Landing Using Colour segmentation and Runway features

Abstract When evaluating aircraft brake control system performance, it is difficult to overstate the importance of understanding dynamic tire forces—especially those related to tire friction behavior. As important as they are, however, these dynamic tire forces cannot be easily or reliably measured. To fill this need, an analytical approach has been developed to determine instantaneous tire forces during aircraft landing, braking and taxi operations. The approach involves using aircraft instrumentation data to determine forces (other than tire forces), moments, and accelerations acting on the aircraft. Inserting these values into the aircraft’s six degree-of-freedom equations-of-motion allows solution for the tire forces. While there are significant challenges associated with this approach, results to date have exceeded expectations in terms of fidelity, consistency, and data scatter. The results show excellent correlation to tests conducted in a tire test laboratory. And, while the results generally follow accepted tire friction theories, there are noteworthy differences.

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COMPARATIVE CHARACTERISTICS OF PHYSICAL AND MECHANICAL PROPERTIES OF COMPOSITE MATERIALS AND HIGH-STRENGTH STEEL 30FGSN2A

STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. In the frame of the XXIII Agribusiness Forum of the South of Russia and the Exhibition «Interagromash» Volume 1 ◽

10.23947/interagro.2020.1.352-355 ◽

2020 ◽

Author(s):

I.R. Antypes ◽

◽

V.V. Zaitsev ◽

Keyword(s):

Composite Materials ◽

High Strength Steel ◽

Critical Stress ◽

Physical And Mechanical Properties ◽

High Strength ◽

Aviation Industry ◽

Specific Strength ◽

Aircraft Landing ◽

Carbon Plastics ◽

Aircraft Landing Gear

Currently, the use of composite materials is increasingly used in various areas of the national economy, including the aviation industry. The materials of this article are devoted to the study of the use of composite materials for the manufacture of aircraft landing gear in comparison with the traditionally used brand of steel. As a result of the work carried out, it was found that the slope made of carbon fiber showed a critical stress twice as high as its design made of 30xgsn2a steel. In addition, carbon plastics are superior to high-strength steel in terms of specific strength, stiffness, and tensile strength.

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ALMAR 20

Alloy Digest ◽

10.31399/asm.ad.sa0162 ◽

1964 ◽

Vol 13 (4) ◽

Keyword(s):

Corrosion Resistance ◽

Low Temperature ◽

Solid Fuel ◽

Precipitation Hardening ◽

Martensitic Steel ◽

Heat Treating ◽

Aircraft Landing ◽

Temperature Performance ◽

Aircraft Landing Gear ◽

High Nickel

Abstract ALMAR 20 is a high nickel martensitic steel which is strengthened by precipitation hardening. It has excellent combination of strength and toughness particularly in the presence of notches and cracks. It is recommended for applications such as solid fuel rocket cases and aircraft landing gear. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SA-162. Producer or source: Allegheny Ludlum Corporation.

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FERRIUM S53

Alloy Digest ◽

10.31399/asm.ad.sa0589 ◽

2008 ◽

Vol 57 (12) ◽

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Corrosion Resistance ◽

Heat Treating ◽

Corrosion Resistant Steel ◽

Resistant Steel ◽

Corrosion Resistant ◽

Aircraft Landing ◽

Aircraft Landing Gear ◽

Better Than

Abstract Ferrium S53 was developed for use as a structural corrosion resistant steel for aircraft landing gear. S53 has a corrosion resistance equivalent to 440C, strength equivalent to or better than 300M (AMS 6257A) and SAE 4340 (see Mechanical Properties), optimum microstructure features for maximum fatigue resistance, and a surface hardenability equal to or greater than 67 HRC for wear and fatigue. This datasheet is an update to Alloy Digest SS-942 and SS-1003. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: SA-589. Producer or source: QuesTek Innovations, LLC.

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A Simplified Protocol for the Stereospecific Nickel-Catalyzed C–S Vinylation Using NiX2 Salts and Alkyl Phosphites

Synthesis ◽

10.1055/s-0039-1690717 ◽

2019 ◽

Vol 52 (02) ◽

pp. 311-319

Author(s):

Austin D. Marchese ◽

Bijan Mirabi ◽

Egor M. Larin ◽

Mark Lautens

Keyword(s):

Cross Coupling ◽

Robust Method ◽

Alkyl Phosphites

A Ni-catalyzed C–S cross-coupling using only NiI2 (0.5–2.5 mol%) and P(OiPr)3 (2.0–10.0 mol%) is reported. Using an air-stable Ni(II) precatalyst, and a cheap and commercially available ligand, a scalable and robust method was developed to cross-couple various thiophenols and styryl bromides, including some sterically encumbered thiols, an α-bromocinnamaldehyde as well as a thiolation-cyclization.

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A new queueing model for aircraft landing process

10.2514/6.1997-3737 ◽

1997 ◽

Cited By ~ 3

Author(s):

Hong Chen ◽

Yiyuan Zhao ◽

Hong Chen ◽

Yiyuan Zhao

Keyword(s):

Queueing Model ◽

Aircraft Landing

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Patch antenna sensor for wireless ice and frost detection

Scientific Reports ◽

10.1038/s41598-021-93082-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Ryan Kozak ◽

Kasra Khorsand ◽

Telnaz Zarifi ◽

Kevin Golovin ◽

Mohammad H. Zarifi

Keyword(s):

Resonant Frequency ◽

Patch Antenna ◽

Wide Band ◽

Power Lines ◽

Ice Thickness ◽

Ice Accretion ◽

Robust Method ◽

Frequency Shifts ◽

Resonant Amplitude ◽

Recorded Data

AbstractA patch antenna sensor with T-shaped slots operating at 2.378 GHz was developed and investigated for wireless ice and frost detection applications. Detection was performed by monitoring the resonant amplitude and resonant frequency of the transmission coefficient between the antenna sensor and a wide band receiver. This sensor was capable of distinguishing between frost, ice, and water with total shifts in resonant frequency of 32 MHz and 36 MHz in the presence of frost and ice, respectively, when compared to the bare sensor. Additionally, the antenna was sensitive to both ice thickness and the surface area covered in ice displaying resonant frequency shifts of 2 MHz and 8 MHz respectively between 80 and 160 μL of ice. By fitting an exponential function to the recorded data, the freezing rate was also extracted. The analysis within this work distinguishes the antenna sensor as a highly accurate and robust method for wireless ice accretion detection and monitoring. This technology has applications in a variety of industries including the energy sector for detection of ice on wind turbines and power lines.

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641 What Is the Most Reliable Way to Secure A Surgical Drain?

British Journal of Surgery ◽

10.1093/bjs/znab134.157 ◽

2021 ◽

Vol 108 (Supplement_2) ◽

Author(s):

B Hughes ◽

J Stallard ◽

S Jivan

Keyword(s):

Suture Material ◽

Suture Techniques ◽

Robust Method ◽

Suturing Technique ◽

The Moment ◽

Tissue Reactions ◽

Surgical Drain

Abstract Introduction Surgical drains are used by many specialities, we aim to determine the most robust method of securing them by comparing suturing technique, material and fixation angle. Method A Blake’s drain was inserted into a piece of pork belly and secured using a standard ‘three half hitch’ technique with 3.0 Silk, EthilonTM and ProleneTM . For each suture type, drains were sutured in line, at 45 and 90 degrees to the course of the drain. The force needed for the suture to failure was measured and each repeated 3 times. Different suture techniques were then used to determine the strongest fixation. Results With the drain exiting inline the moment of failure was, on average, 1.25kg for silk, 3.5kg for EthilonTM and 4.0kg for ProleneTM. Increasing drain fixation angle required more force for the suture to fail. With EthilonTM and ProleneTM, the suture snapped before the drain slipped. Three half hitches was the strongest technique. Conclusions Suture material, technique and drain fixation angle had an impact on suture strength with ProleneTM outperforming Silk. We advocate using a ‘three half hitch’ technique with 3.0 ProleneTM to secure a surgical drain. It offers superior strength whilst reducing the risk of localised tissue reactions.

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