This paper analyzes the comfort of wheelchair users when a sliding-mode trajectory-tracking controller is used. The transmission of the horizontal (fore-and-aft) vibration to the head-neck complex (HNC) in the seated human body may cause unacceptable discomfort and motion sickness. A double-inverted pendulum model with two degrees of freedom is considered as a model for the HNC. The user comfor...

Technical preventive measures against vibration syndrome in the field of industrial health are reviewed in the present paper. The first technical prevention measure is to reduce vibration transmission from the tools to the operators. This measure employs vibration isolators between the handles and vibration sources of machine tools. Handles of tools using Neidhalt dampers, shear type rubber mou...

By applying tension asymmetries in a finite-element model of vocal fold vibration, a variety of modes of phonation were simulated. The biophysical model incorporated tissue mechanics, glottal aerodynamics, and acoustics of the vocal tract. For simplicity and speed, glottal aerodynamics were modeled with a modified Bernoulli equation. Vocal tract acoustics were modeled using a wave reflection an...

Predicting the sound insulation of an engineering system is a complex problem since not only direct path through separating element but also flanking transmission paths can largely influence system. When conventionally analyzing transmission, diffuse field assumed in walls and floors, which are modelled as plates. The junction connecting floors to be infinite extent vibration across calculated ...

This study focusses on the vibration transmission and energy flow characteristics of low dimensional models dynamical systems with Coulomb friction. The Karnopp friction model smooth are employed to estimate dry force. steady-state responses system determined by harmonic balance (HB) approximations numerical continuations a time-marching method. level dissipation within assessed force transmiss...

Automatic transmission is a key factor for autonomous driving. The condition highly affected by the quality and quantity of oil in system. However, not monitored system, change interval method are still subject discussion. This paper analyzes effects changes automatic transmissions. measurements were carried out before after with same external conditions. With vibration measurement method, data...