Mechanical device for determining the stiffness and the viscous friction coefficient of shock absorber elements modelled by bond graph

20th Innovative Manufacturing Engineering and Energy Conference

机械制造;能源学

Ibnescu, R.^1 ; Ibnescu, M.^1

Department of Theoretical Mechanics, Gheorghe Asachi Technical University of Iasi, Bd. Dimitrie Mangeron nr. 67, Iasi

700050, Romania^1

关键词: Bond graph;    Bond graph method;    Measured values;    Mechanical device;    Non linear;    Oscillatory motion;    Spring stiffness;    Viscous friction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/161/1/012020/pdf
DOI  :  10.1088/1757-899X/161/1/012020

来源: IOP

【 摘 要 】

The present paper presents a mechanical device for the assessment of the fundamental parameters of a shock absorber: the spring stiffness and the viscous friction coefficient, without disassembling the absorber. The device produces an oscillatory motion of the shock absorber and can measure its amplitude and angular velocities. The dynamic model of the system, consisting of the mechanical device and the shock absorber, is performed by using the bond- graph method. Based on this model, the motion equations are obtained, which by integration lead to the motion law. The two previously mentioned parameters are determined by using this law and the measured values of two amplitudes and of their corresponding angular velocities. They result as solutions of a system of two non-linear algebraic equations.