A new concept for UAV landing gear shock vibration control using pre-straining spring momentum exchange impact damper

Son, Lovely; Bur, Mulyadi; Rusli, Meifal

doi:10.1177/1077546316661470

Cited by 19 publications

(12 citation statements)

References 11 publications

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“…One important component of UAV is the landing gear system. The main function of a landing gear system is to support the UAV body during ground maneuvering and reduce the shock-induced vibration that occurred during landing (Son et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Shock and harmonic response analysis of UAV nose landing gear system with air damper

et al. 2021

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This research presents a response analysis of a UAV nose landing gear system equipped with an air damper under shock and harmonic excitation. The study begins with dynamic modeling of the UAV landing gear system. The system dynamics consists of a main mass and a wheel mass that are connected to each other by a U-shaped landing gear. The U-shaped landing gear is modeled by a linear spring and dashpot element. The air damper is added to the landing gear to increase the damping. The air damper consists of an air balloon that is connected to the outside via an orifice hole and the connecting pipe. A serial connection of spring, mass, and dashpot elements describes the air damper dynamic model. The simulation study is conducted to evaluate the effect of the landing gear parameters variation on the UAV dynamic response under shock and harmonic excitation. The maximum acceleration and displacement response of the UAV body under shock load is greatly affected by the air balloon cross-sectional area (A ef ) and the stiffness of the U-shaped landing gear system (K L ). The harmonic response of the UAV body is evaluated from the ratio between the UAV body displacement amplitude and the base excitation amplitude under harmonic excitation. It is shown that the air balloon cross-sectional area (A ef ) and the connecting pipe length (l p ) have a significant effect on the UAV mass displacement ratio. The experimental study is ABOUT THE AUTHOR All persons who meet authorship criteria are listed as authors, and all authors certify that they have participated sufficiently in the work to take public responsibility for the content, including participation in the concept, design, analysis, writing, or revision of the manuscript.

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Section: Introductionmentioning

confidence: 99%

Shock and harmonic response analysis of UAV nose landing gear system with air damper

et al. 2021

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“…Their secret resides in their simplicity, which makes them ideal for modeling more complex systems by taking advantage of the modularity principle. The concept of an MSD system has been implemented on a vast number of practical fields, such as in the reduction of vibrations [1,2], in control systems analysis [3,4], and in power generation [5,6]. Those systems have been independently studied under different lenses, such as fractional calculus and entropy production.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation in a Mass-Spring-Damper System Using a Conformable Model

2020

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This article studies the entropy generation of a mass-spring-damper mechanical system, under the conformable fractional operator definition. We perform several simulations by varying the fractional order γ and the damping ratio ζ , including the usual dynamic response when γ = 1.0 and the typical damping cases. We analyze the entropy production for this system and its strong dependency on both γ and ζ parameters. Therefore, we determine their optimal values to obtain the highest efficiency of the MSD response, as well as other impressive features.

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“…This condition can reduce system safety and comfort (Sezgin and Arslan 2012). Furthermore, in some cases, the large amplitude impulsive forces can damage the main system components (Son, Bur, and Rusli 2018).…”

Section: Introductionmentioning

confidence: 99%

“…PSMEID has good performance over a wide range of excitation frequencies, whilst the PMEID performance is only effective at the excitation frequency much larger than the primary mass natural frequency (Son, Bur, and Rusli 2017). Recently, the PSMEID method has been proposed to reduce the impact-induced vibration of UAV landing gear; however, the energy and momentum exchange during impact is still not clearly understood, and the simulation results are not yet experimentally verified (Son, Bur, and Rusli 2018).…”

Section: Introductionmentioning

confidence: 99%

Energy analysis and experimental evaluation of momentum exchange impact damper with pre-straining spring mechanism

Son

Satria

Malta

et al. 2020

Australian Journal of Mechanical Engineering

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The aim of this research is to evaluate the performance of impact-induced vibration control using momentum exchange impact damper with pre-straining spring mechanism (PSMEID) based on the energy analysis and verifying the effectiveness of the proposed method experimentally using a simple three-body collision model. It is shown from the simulation study that the fraction of energy absorbed by the primary mass was small if the excitation frequency differs from the primary mass natural frequency. In the case of excitation frequency is lower than the primary mass natural frequency, most of the impact energy is transferred to the damper mass. For excitation frequencies higher than the primary mass natural frequency, a large amount of impact energy is reflected after the collision. The energy absorption ratio is small if the damper mass ratio(M d /M p) approaches 0.2 and the ratio between pin force (f pin)and the reference friction force (f fref) closest to 1. The optimum condition of the pre-straining spring stiffness increases when the impact damper mass ratio is increased. The experiment was conducted to validate the simulation results. The experimental data has shown that the minimum acceleration response is obtained using the pre-straining spring deflection ratio (x ps /x psref = 0.18).

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A new concept for UAV landing gear shock vibration control using pre-straining spring momentum exchange impact damper

Cited by 19 publications

References 11 publications

Shock and harmonic response analysis of UAV nose landing gear system with air damper

Shock and harmonic response analysis of UAV nose landing gear system with air damper

Entropy Generation in a Mass-Spring-Damper System Using a Conformable Model

Energy analysis and experimental evaluation of momentum exchange impact damper with pre-straining spring mechanism

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