Theoretical and Experimental Analysis of a Vibration Isolation System Using Hybrid Magnet

Abstract

An active vibration isolation system using hybrid magnet is investigated theoretically and experimentally. A quarter car model with one degree of freedom spring mass system is considered for this analysis. A cylindrical type hybrid magnet, considered as actuator is placed in parallel to the springs to provide external force on the top and bottom plates to suppress vibration. The theoretical time response characteristics of the model have been determined and correlated with experimental analysis. For theoretical analysis, the response of the top plate is analyzed by considering the base plate disturbance as a input signal to vary the actuator force .The force exerted by the hybrid magnet is non linear in nature and the simplified relation for this force was obtained using Bessel's recurrence formula. The modeling of undamped one degree of freedom quarter car model is carried out using MATLAB Simulink tool. The above study is also investigated experimentally by employing a shaker and analyzed using LABVIEW and fast Fourier transform (FFT) analyzer.