Abstract In this paper, an experimental and theoretical study for designing a nonlinear electromagnetic converter-based magnetic spring is performed. The governing equation of the converter investigated. A special focus given to force acting on moving magnet in dependence its volume geometry two fixed magnets, i.e., disc or ring. For developed analytical numerical model, same has been used all ...

This work aimed to improve the vehicle body stability and ride comfort of tracked military crew. For this purpose, magnetorheological fluid dampers were used. process has made theoretical model platform a semi-active suspension system. modification allows for application different control laws these systems. The usage continuous skyhook law assumes influence three fictitious viscous dampers. Th...

| Detection of incipient (slowly developing) faults is crucial in automated maintenance problems where early detection of worn equipment is required. In this note, a general framework for model-based fault detection and diagnosis of a class of incipient faults is developed. The changes in the system dynamics due to the fault are modeled as nonlinear functions of the state and input variables, w...

In this tutorial, we cover the effect of nonlinear spring forces on (micro)resonators. The motivation of analysis is: i. to understand the nonlinear effects observed with real resonators and ii. to estimate the maximum vibration amplitude where vibrations are almost linear. Knowing the range for linear vibrations sets the dynamic range for resonators. On the lower end, the usable range is limit...

in this paper, nonlinear vibration and instability response of an embedded pipe conveying viscose fluid is investigated. the pipe is considered as a timoshenko beam embedded on an elastic foundation which is simulated by spring constant of the winkler-model and the shear constant of the pasternak-model. the external flow force, acting on the beam in the direction of the flexural displacement is...

in this study, nonlocal nonlinear instability and the vibration of a double carbon nanotube (cnt) system have been investigated. the visco-pasternak model is used to simulate the elastic medium between nanotubes, on which the effect of the spring, shear and damping of the elastic medium is considered. both of the cnts convey a viscose fluid and a uniform longitudinal magnetic field is applied t...