Mathematical model of controlled vane hydraulic shock absorber

Abstract

Introduction. Modern technologies, as well as various methods and schemes currently used in technology, have made it possible to automatically control the damping properties of shock absorbers, which increases the energy intensity of the entire suspension system. However, in order to use these solutions in practice, it is necessary to develop mathematical models of these damping elements. Such models serve as a theoretical tool for studying the described processes in order to implement the correct control action. As for such units as controlled (adjustable) vane shock absorbers, the studies carried out earlier on them are clearly not enough to ensure their effective operation in various conditions.The object of this study is a controlled vane hydraulic shock absorber.The purpose of this work is to carry out theoretical studies and improve the methodology for calculating controlled (adjustable) bladed hydraulic shock absorbers, in which magnetorheological fluid is used as the working fluid of the shock absorber.Research methods. The design and principle of operation of controlled vane hydraulic shock absorber with magnetorheological (MR) throttles are considered. Method of calculation is proposed and theoretical studies are performed on influence of change of volume flow rate of working medium of shock absorber in MR throttle on forces of resistance to rotation on shaft of shock absorber blade.The results of theoretical research. 1) Results of theoretical studies of change of volume flow rate of working medium of controlled hydraulic blade shock absorber are presented. 2) An adequate mathematical model is obtained that is suitable for calculating the characteristics of controlled (adjustable) hydraulic vane shock absorbers, where magnetorheological fluid is used as the working medium of the shock absorber, as well as for selecting control action in the control system. Conclusion. The results of the study are intended for organizations and enterprises engaged in the development and production of heavy high-speed tracked vehicles.The results of the studies can be used to refine the methodology for estimating the smoothness of the heavy high-speed tracked vehicles.

Keywords

• controlled shock-absorber
• mathematical model
• magnetorheological throttle
• magnetorheological liquid
• volume flow
• pressure difference
• hydraulic resistance
• damping coefficient
• magnetic field
• tension of magnetic field