In this study, it is concluded that the main factor influencing the stiffness of a diaphragm-type air spring is the deformation stiffness of the rubber airbag by calculating the ratio of compressed air stiffness to total stiffness. At the moment, no consistent conclusion has been reached as to whether the main factor influencing air spring stiffness is the stiffness of compressed air 1 or the deformation stiffness of rubber airbags 2. In recent years, the vehicle industry has also become quite interested in the research on air springs.Ĭompressed air stiffness and rubber deformation stiffness make up the majority of air spring stiffness. Air suspension is available on vehicles like the NIO ES8, Audi A8, Hong Qi HS7, and others. Similar content being viewed by othersĭue to its reasonable nonlinear elastic properties, low vibration frequency, effective energy absorption rate, adjustable stiffness characteristics for optimum driving comfort, and other benefits, air springs are popular among automakers and consumers. The vertical dynamic stiffness obtained from both simulation and experiment showed a strong correlation in numerical values, which verified the accuracy of the FEA model of air spring established in this paper. This proves that the predicted vertical dynamic stiffness variation law is reliable. The results show that the vertical dynamic stiffness obtained through simulation and experiment is consistent with the theoretical prediction, when various factors such as material nonlinearity, element coupling, and stiffness value sensitivity were considered. An air spring finite element analysis (FEA) and experiment were conducted. The variation law of vertical dynamic stiffness of air spring was predicted by theory: due to the material's viscoelasticity, the vertical dynamic stiffness rises as the excitation frequency rises, and the vertical dynamic stiffness decreases with the increase of excitation amplitude due to the damping of the material. The ratio of the vertical stiffness change caused by compressed air to the total vertical stiffness change was calculated, and it was determined that the nonlinearity of air spring vertical stiffness was mainly caused by the deformation stiffness of the rubber airbag. There are a number of applications for this style of 'shock sensor' switch.Using the diaphragm-type air spring as the research object. You can even leave a long tail on the coil, and set it up next to a door so that as the door opens it pushes the coil into the center leg as a soft touch something-er-other monitor. Depending on the pliability of the coil, one can add mass to the free end of the coil with a drip of solder, or invert the system and use a much larger weight, or use stiffer coil wire, or a larger diameter, via any number of variables in the system one can tune the dynamics of the system to fit a number of applications. When enough force through a change in velocity vector (a sudden change in direction), through kinetics, the coil contacts the center leg closing the circuit for an instant thus triggering the flasher controller chip. Ever seen those bouncy balls that have a little LED flasher inside that lights up for like a minute when you bounce it? They use a switch like this, a coil of narrow wire that can sproing around with sharp motion like the rebound of a bounce, and a more solid metal leg up the middle.
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