Laboratory shock tests involve the reproduction of simple one-time and repeated pulses a certain waveform. In practice, such mechanical impacts on an object are implemented at specialized testing equipment ‒ systems. A promising direction in development machines includes structures that operate energy elastic deformation compressed liquid shell vessel contains it. Such systems make it possible ...

There are over one million workers exposed to hand-arm vibration in the United States. Cases of handarm vibration syndrome have been reported in the U.S. since 1918. Typical hand-arm vibration exposure conditions are given in this presentation. Vibration control methods are discussed; these include vibration damping and isolation, use of antivibration (A/V) tool and gloves, and the application ...

Systems that exhibit flexible dynamics are susceptible to vibration caused by changes in the reference command and from external disturbances. Feedback control is an obvious choice to deal with these vibrations, but in many cases, it is insufficient or difficult to implement. Input shaping does not deal with vibration excited by external disturbances; however it has proven beneficial for reduci...

The mean vibration transmissibility values were measured for cotton work gloves commonly used in vibration-generating workplaces to evaluate the vibration isolating performance of cotton work gloves. The mean vibration transmissibility values of work cotton gloves were compared with those of four types of anti-vibration gloves measured in the same way. All the measurements were performed based ...

BACKGROUND Besides noise, mechanical vibration of a general effect (whole body vibration), is an important physical risk factor that occurrs in the farmers' work environment. The vibration occurs on the seats of agricultural vehicles in motion, during the performance of specified field and transportation work tasks. MATERIAL AND METHOD The study covered the measurements of time schedules of a...