Test Research on Airdrop Shock Vibration of Armored Vehicles

Abstract

In view of the airdrop adaptability of a lightweight high-mobility wheeled armored vehicle, the shock vibration of the vehicle’s onboard electronic equipment under simulated airdrop was tested and the shock characteristic of the equipment was analyzed. The test results show that the onboard equipment of the airdrop vehicle is mainly subjected to three stages of shock vibration, which includes the crash of the lifting rope, shock of the cushion airbag and the rebound shock. The cushion airbags can effectively reduce the shock acceleration peak of the onboard electronic equipment of the light wheeled armored vehicle, and the shock peak of the onboard computer and power supply is about 9-10 g with the shock duration of 0.15-0.2 s. While compared with the shock of the base, the buffering effect of the isolators to the airdrop shock vibration is not satisfied. Resonances of the isolation system are caused by the airdrop shock and the shock peaks of the tested electronic equipment are higher than that of the base.

An adaptive shock mitigation control method for helicopter seat system with magnetorheological energy absorbers

“…The magnetorheological energy absorber (MREA), which changes the damping characteristics by adjusting the applied current or voltage, can well math the adaptability requirements of the helicopter seat system (Choi and Wereley, 2005; Hiemenz et al, 2007). Moreover, the shock mitigation systems with MREA has a good prospect in the fields of gun recoil (Ahmadian and Poynor, 2001; Ouyang et al, 2016; Zheng et al, 2016), light car seats (Marian-Florin and Camelia, 2019), aircraft landing (Choi et al, 2016; Lei et al, 2014) and armoured vehicles (Batterbee et al, 2007; Hou et al, 2019) for the advantages of low energy consumption, high reliability and high adaptability, which motivate the research on the helicopter seat system with MREA.…”

A minimum transmitted load control method for shock isolation mounts with magnetorheological energy absorbers

“…MREA can quickly change its damping characteristics after applying current or voltage, so it can quickly adjust its load-stroke profile and has the potential to accommodate to varying working conditions. So far, MREAs have been installed in many equipment used in shock environments, such as landing gear systems (Batterbee et al, 2007; Choi et al, 2016; Mikułowski and Jankowski, 2009), vehicle suspension systems (Bai et al, 2013; Hou et al, 2019), helicopter seat systems (Choi and Wereley, 2005; Hiemenz et al, 2007), recoil system of gun structures (Ahmadian and Poynor, 2001; Zheng et al, 2016), and other systems (Ahmadian and Norris, 2008). MREAs are also applied in shock isolation mounts and has a good performance (Eem et al, 2019; Singh and Wereley, 2013).…”