Research on Calculation Method of Dumping Force for Single-Cylinder Magnetorheological Damper
Magnetorheological damper has a series of advantages such as simple structure,short response time,large and continuously adjustable damping force,which is the hot spot of current research.However,there are still many problems in the calculation of damping force and semi-active control theory of magnetorheological damper.Aiming at these problems,a single-cylinder magnetorheological damper is designed and a single-cylinder magnetorheological damper damping force calculation method is proposed.Firstly,a single-cylinder magnetorheological damper damping force model is established.Secondly,a magnetic domain model of the single-cylinder magnetorheological damper is established,and the magnetic field distribution is derived by using the simulation software.Finally,the relationship between the core inlet and outlet flux densities and the coil current is derived through experiments.Calculation results show that the magnetic flux density at the inlet and outlet of the flow channel and the coil current becomes a linear rule of change,and the damping force with the increase of the coil current shows an increasing and then decreasing rule of change.In the absence of current,the damping force increases with the increase of the speed of the core movement;after the current,the damping force is affected by the speed of the core is very small;the damping force decreases with the gap between the core and the cylinder barrel,and with the increase of the gap,the effect of the speed of the core movement on the damping force also decreases.The proposed methodology study can be of research significance for the damping study and control strategy study of single cylinder magnetorheological damper.
magnetorheological fluidsingle-cylinder damperdamping forcemagnetic field analysis
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