Experimental Investigations of Parameters Influence on Total Damping Force in MR Fluid Base Damper

Abstract

A magnetorheological fluid composition having a magnetisable carrier medium loaded with magnetisable particles to provide a magnetorheological fluid exhibiting enhance rheological properties. Also disclosed in a magnetic particle damper utilizing the magnetorheological fluid composition. Magnetorheological (MR) dampers are one of the most advantageous control devices for mechanical engineering applications due to many good features such as small power requirement, reliability, and low price to manufacture. The smart passive system (semi active control system) consists of an MR damper and an electromagnetic induction (EMI) system that uses a permanent magnet and a coil. According to the Faraday law of induction, the EMI system that is attached to the MR damper can produce electric energy and the produced energy is applied to the MR damper to vary the damping characteristics of the damper. Thus, the smart passive system does not require any power at all. Besides the output of electric energy is proportional to input loads due to vibration, which means the smart passive system has adaptability by itself without any controller or sensors.In the present study, an attempt has been made to investigate the effect of velocity, amplitude and current on total damping force in MR fluid base damper developed at Physics Department, Shri M.K. Bhavnagar University. The experiments were conducted based on response surface methodology (RSM) and sequential approach using face cantered central composite design. The results show that all the factors (piston velocity, Amplitude and Current) has significant effect on Total Damping Force. A linear model best fits the variation of total damping force with velocity, amplitude and current. Current is the dominant contributor to the total damping force. A non-linear quadratic model best describes the variation of total damping force with major contribution of all parameters. The suggested models of total damping force adequately map within the limits of the parameters considered.