The Prediction and Correction Method of Aircraft Static Aeroelastic Effects: A Review of Recent Progress

Guo, Hao; Yan, Yu; Xia, Hongya; Liu, Yu; Lv, Binbin

doi:10.3390/act11110309

Cited by 4 publications

(5 citation statements)

References 107 publications

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“…Relative density, ρ r , is a critical design parameter that significantly affects the mechanical properties of EMWM. It quantifies the volume fraction of coiled wires within the entire specimen and is defined by Equation (1). Some studies also uses the term "porosity" to describe the porous characteristics of EMWM.…”

Section: Materials and Specimensmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical Property Degradation of Entangled Metallic Wire Materials under Vibration Environment: Experiments and Prediction Models

Ma,

Liang,

Wang

et al. 2023

Actuators

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Entangled metallic wire material (EMWM) can be utilized as a novel elastic element in vibration isolation devices for mechanical actuators. This paper presents a vibration experiment aimed at investigating the degradation behavior of mechanical performance in EMWM under a cyclic compressive environment. An electric vibration testing system, coupled with an isolation structure, is employed to apply compressive loads to the EMWM specimens. Through visual observations and quasi-static compression tests, the variations in geometric morphology and mechanical properties are studied, considering different relative densities and vibrational stress amplitudes. The results indicate a significant reduction in the compressed dimension of the specimens as the number of cycles increases, without any wire fractures or wear. The mechanical properties exhibit an increasing secant modulus and a decreasing loss factor. These variations ultimately lead to a gradual deviation of the vibration characteristics of the isolation structure from its design state, including resonance frequency and transmission rate. To forecast the mechanical property degradation of EMWM, prediction models are proposed, incorporating its dimensions, modulus, and damping by fitting the experiment results. This research provides valuable experimental data and presents an effective method to determine the operational lifespan of vibration isolators utilizing EMWM.

show abstract

Section: Materials and Specimensmentioning

confidence: 99%

“…The external actuators of aerospace crafts and submersibles are subjected to continuous, severe fluid and mechanical excitations, where thin-walled components are prone to vibration fatigue failure [1,2]. To address this issue, it is common to design vibration isolation devices to reduce the stress and deformation of the actuators.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Property Degradation of Entangled Metallic Wire Materials under Vibration Environment: Experiments and Prediction Models

Ma,

Liang,

Wang

et al. 2023

Actuators

View full text Add to dashboard Cite

show abstract

“…Relative density is a critical design parameter that significantly affects the mechanical properties of EMWM. It quantifies the volume fraction of coiled wires within the entire specimen and is defined by Equation (1). Some literature also uses the term "porosity" to describe the porous characteristics of EMWM.…”

Section: Materials and Specimensmentioning

confidence: 99%

“…The external actuators of aerospace crafts and submersibles are subjected to continuous, severe fluid and mechanical excitations, where thinwalled components are prone to vibration fatigue failure [1,2]. To address this issue, it is common to design vibration isolation devices to reduce the stress and deformation of the actuators.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical Property Degradation of Entangled Metallic Wire Materials under Vibration Environment: Experiments and Prediction Models

Ma,

Liang,

Wang

et al. 2023

Preprint

View full text Add to dashboard Cite

Entangled metallic wire material (EMWM) can be utilized as a novel elastic element in vibration isolation devices for mechanical actuators. This paper presents a vibration experiment aimed at investigating the degradation behavior of mechanical performance in EMWM under cyclic compressive environment. An electric vibration testing system, coupled with an isolation structure, is employed to apply compressive loads to the EMWM specimens. Through visual observations and quasi-static compression tests, the variations in geometric morphology and mechanical properties are studied, considering different relative densities and stress amplitudes. The results incidate a significant reduction in the compressed dimension of the specimens as the number of cycles increases, without any wire fractures or wear. Moreover, the mechanical properties exhibit an increasing secant modulus and a decreasing loss factor. These variations ultimately lead to a gradual deviation of the vibration characteristics of the isolation structure from its design state. To predict the mechanical property degradation of EMWM, prediction models are proposed, incorporating dimension, modulus and damping by fitting the obtained results. This research provides valuable experimental data and presents an effective method to determine the operational lifetime of vibration isolators utilizing EMWM.

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Designing a flight information collection system for calculating the aerodynamic characteristics of a UAV

Mazin¹

2023

Ontology of Designing

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The article describes the development of an onboard information collection system for calculating the aerodynamic characteristics of unmanned aerial vehicles (UAVs), which can only be obtained under free flight conditions. A functional diagram is presented, a flight parameters registration system operation algorithm is described. The proposed so-lutions make it possible to collect a large amount of information and improve system efficiency through the selection and compression of information. The collected information is used to determine the aerodynamic characteristics, eliminating the need to test UAVs models in wind tunnels, which can save money and time on the development of new UAVs. The features of the information exchange between the system elements are considered, which make it possible to speed up the data transfer, and therefore improve the accuracy of measurements by increasing the frequency of polling measuring devices. The results obtained may be of interest to developers of autonomous measuring systems. Of particular importancce for calculating the aerodynamic characteristics of an UAV using the proposed method is the high accuracy of measuring the parameters of the aircraft trajectory, including the linear accelerations and angular velocities that occur in the course of motion. In addition, the article considers a variant of the hardware implementa-tion of the proposed system for UAVs.

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The Prediction and Correction Method of Aircraft Static Aeroelastic Effects: A Review of Recent Progress

Cited by 4 publications

References 107 publications

Mechanical Property Degradation of Entangled Metallic Wire Materials under Vibration Environment: Experiments and Prediction Models

Mechanical Property Degradation of Entangled Metallic Wire Materials under Vibration Environment: Experiments and Prediction Models

Mechanical Property Degradation of Entangled Metallic Wire Materials under Vibration Environment: Experiments and Prediction Models

Designing a flight information collection system for calculating the aerodynamic characteristics of a UAV

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