The latency time, which is the residual vibration of afine actuator and track eccentricity, has been the aim for direct pull-in in optical disk system. Modified velocity profiles of the coarse actuator and control inputs of the fine actuator have been proposed for the minimum residual vibration. Generally, there exists eccentricity due to mismatch of the disk center and the axis of a spindle mo...

Original scientific paper Reducing the manufacturing time is the trend of high precision manufacturing, and the precision of a work-piece is very important for the manufacturing industry. The high-speed motorized spindle is the most critical part and becoming more widely used in the machine tool at present, and its precision may affect the overall performance of high-speed cutting. Most of the ...

The effects of stimulating the reflex arc from dynamic spindle endings were examined in patients with the rigidity of Parkinsonism and in control subjects. The arc was activated phasically by a tendon tap and by electrical stimulation in 15 patients. The effect of reinforcement by Jendrassik's manoeuvre was observed. The response to phasic activation indicated central facilitation of the reflex...

In practical engineering, quality control of mechanical components or parts of rotational machinery is quite important. As for rolling bearings, the defects from rolling bodies, internal ring, external ring, and retainer are more focused on. Therefore, in this work, a vibration and noise test system is developed for the defect diagnosis of mechanical components above-mentioned. The key point of...

Discharges of single afferent fibers from the primary endings of the soleus muscle spindles were recorded from thin dorsal root filaments in cats anesthetized with urethane and chloralose. The distal cut end of the ventral root was split into fine filaments to obtain functionally single fusimotor fibers. The fusimotor fibers obtained in this study were of the static type. The soleus muscle was ...

The development of the muscle vibration technique in humans provides a new means for studying the role played by muscle afferents in motor control and, furthermore, the technique seems to have diagnostic as well as therapeutic applications. It is now well documented that high frequency mechanical vibration applied to any skeletal muscle in man tends to induce the following reflex response: sust...

The unbalanced magnetic pull (UMP) is one of the main vibration sources motorized spindle. A calculation model UMP in a synchronous spindle considering magneto-thermal coupling proposed this paper. finite element analysis models electromagnetic field and temperature are first established. Then two-way method effect variations on material properties motor proposed. An experiment conducted to ver...