scholarly journals Experimental Studies of Application Passive Momentum Exchange Impact Damper (PMEID) on UAV’S Landing Gear

2021 ◽  
Vol 1041 (1) ◽  
pp. 012065 ◽  
Author(s):  
Darmawan ◽  
Lovely Son ◽  
Mulyadi Bur ◽  
Nurmansyah
Keyword(s):  
Experimental Studies ◽  
Landing Gear ◽  
Momentum Exchange ◽  
Impact Damper

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

2016 ◽  
Vol 24 (8) ◽  
pp. 1455-1468 ◽  
Author(s):  
Lovely Son ◽  
Mulyadi Bur ◽  
Meifal Rusli
Keyword(s):  
Landing Gear ◽  
Main Body ◽  
Force Transmission ◽  
Momentum Exchange ◽  
Lumped Mass ◽  
Maximum Acceleration ◽  
Impact Damper ◽  
Aerial Vehicle ◽  
Theoretical Application ◽  
The Impact

This study proposes a new method for reducing the shock vibration response of an Unmanned Aerial Vehicle (UAV) during the landing process by means of the momentum exchange principle (MEID). The performance of the impact damper is improved by adding a pre-straining spring to the damper system. This research discusses the theoretical application of the damper to the UAV landing gear system. The UAV dynamics is first modeled as a simple lumped mass translational vibration system. Then we analyze a more complex two-dimensional model of UAV dynamics. This model consists of the main wheel, nose wheel and main body. Three cases of UAV landing gear mechanisms: without damper, with passive MEID (PMEID) and with pre-straining spring MEID (PSMEID) are simulated. The damper performance is evaluated from the maximum acceleration and force transmission to the main body. The energy balance calculation is conducted to investigate the performance of PSMEID. The simulation results show that the proposed PSMEID method is the most effective method for reducing the maximum acceleration and force transmission of UAV during impact landing.

Robust Landing Gear System Based on a Hybrid Momentum Exchange Impact Damper

2013 ◽  
Vol 36 (3) ◽  
pp. 776-789 ◽  
Author(s):  
Yohei Kushida ◽  
Susumu Hara ◽  
Masatsugu Otsuki ◽  
Yoji Yamada ◽  
Tatsuaki Hashimoto ◽  
...  
Keyword(s):  
Landing Gear ◽  
Gear System ◽  
Momentum Exchange ◽  
Impact Damper

Fundamental Study of Momentum-Exchange-Impact-Damper-Based Robust Landing Gear

2012 ◽  
Author(s):  
Yohei Kushida ◽  
Susumu Hara ◽  
Masatsugu Otsuki ◽  
Yoji Yamada ◽  
Tatsuaki Hashimoto ◽  
...  
Keyword(s):  
Landing Gear ◽  
Momentum Exchange ◽  
Fundamental Study ◽  
Impact Damper

Momentum exchange impact damper design methodology for object-wall-collision problems

2017 ◽  
Vol 24 (14) ◽  
pp. 3206-3218
Author(s):  
Yohei Kushida ◽  
Hiroaki Umehara ◽  
Susumu Hara ◽  
Keisuke Yamada
Keyword(s):  
Optimal Design ◽  
Design Methodology ◽  
Design Parameters ◽  
Momentum Exchange ◽  
Impact Damper ◽  
One Dimensional ◽  
Practical Design ◽  
Wall Collision ◽  
Damper Design ◽  
And Control

Momentum exchange impact dampers (MEIDs) were proposed to control the shock responses of mechanical structures. They were applied to reduce floor shock vibrations and control lunar/planetary exploration spacecraft landings. MEIDs are required to control an object’s velocity and displacement, especially for applications involving spacecraft landing. Previous studies verified numerous MEID performances through various types of simulations and experiments. However, previous studies discussing the optimal design methodology for MEIDs are limited. This study explicitly derived the optimal design parameters of MEIDs, which control the controlled object’s displacement and velocity to zero in one-dimensional motion. In addition, the study derived sub-optimal design parameters to control the controlled object’s velocity within a reasonable approximation to derive a practical design methodology for MEIDs. The derived sub-optimal design methodology could also be applied to MEIDs in two-dimensional motion. Furthermore, simulations conducted in the study verified the performances of MEIDs with optimal/sub-optimal design parameters.

Investigation into the linear velocity response of cantilever beam embedded with impact damper

2019 ◽  
Vol 25 (7) ◽  
pp. 1365-1378 ◽  
Author(s):  
Yiqing Yang ◽  
Xi Wang
Keyword(s):  
Cantilever Beam ◽  
Continuous System ◽  
Linear Velocity ◽  
Superposition Method ◽  
Momentum Exchange ◽  
Impact Damper ◽  
Mode Superposition Method ◽  
Velocity Response ◽  
The Impact ◽  
Nonlinear Velocity

The impact damper causes momentum exchange between the primary structure and impact mass, and achieves vibration attenuation through repeated collisions. A cantilever beam embedded with the impact damper is modeled in the form of a continuous system, and the equations of motion are formulated based on the mode superposition method. The mechanism of the impact damper is investigated, and linear velocity response is achieved by a proper selection of a mass ratio of 8.4%, clearance within 0.30 mm, and excitation force ranged from 3.2 N to 5.5 N. The reverse collision has higher damping than co-directional collision, based on which a new criterion of response regimes is proposed for the design of the impact damper. The velocity responses of the damped cantilever beam under sinusoidal and impulse excitation are simulated and verified via the sinusoidal sweep experiments. The velocity amplitudes of the damped cantilever beam are linearly decreased when the clearance is increased within 0.30 mm. Finally, linear and nonlinear velocity responses of the damped cantilever beam are discussed. It is found that the nonlinear velocity response reaches larger damping, but that a strongly modulated response exists.

Study on the influence of structural nonlinearity on the performance of multiunit impact damper

2020 ◽  
pp. 107754632092562
Author(s):  
Zheng Lu ◽  
Naiyin Ma ◽  
Hengrui Zhang
Keyword(s):  
Vibration Control ◽  
Damping Ratio ◽  
Mean Square Displacement ◽  
Random Excitation ◽  
Frame Structure ◽  
Control Effect ◽  
Momentum Exchange ◽  
Impact Damper ◽  
Structural Nonlinearity ◽  
Steel Frame Structure

In this article, the vibration control effect of the multiunit impact damper under stationary random excitation and seismic excitation is studied, based on both the elastic and nonlinear benchmark structures. The benchmark structure is a nonlinear steel frame structure, which can calculate the nonlinear response by considering the material nonlinearity at the ends of the beam and column. To analyze the influence of various system parameters on the performance of the multiunit impact damper, such as the number of units, mass ratio, damping ratio, and gap clearance, a great number of parameter studies are carried out. In addition, the control effects of the multiunit impact damper on elastic and nonlinear structures are compared to analyze the influence of structural nonlinearity on the performance of the multiunit impact damper. The results show that a lightweight multiunit impact damper with reasonable parameters can significantly reduce the root mean square displacement response of the benchmark structure. Furthermore, the structural nonlinearity will lead to a decrease in the vibration control performance of the multiunit impact damper. The reasons for this phenomenon are that the effective momentum exchange and energy dissipation of the multiunit impact damper will decrease when the benchmark structure responds in a nonlinear state.

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