The reasons of failure and results caused by separate-exciting frequency mismatching with self-exciting exciting frequency in the stopping process of parallel type solid induction heating power source were analyzed.

Cropping mechanism is a key component for variant frequency vibration cropping,and its excited frequency directly affects manufacturing quality and production efficiency.

By using the statistical analysis and mathematical model establishment technique, the vibration frequency and perpendicular velocity of metering disc mathematical models were established, the influence of the vibration frequency and perpendicular velocity of metering disc on the seeding apparatus was analyzed, and the mechanism for the seeding uniformity was confirmed.

In this paper a study on the effects of different vibration frequency on the reduction extent of welding residual stress systematicly is implemented.

A new method used single-chip microcomputer technology which can realize the real-time correcting and automatic tracing with self-exciting frequency of separate-exciting frequency were proposed and with it the safety working situation were assured.

The design variables include the excitation frequency and the stiffness of vibration isolation system.

By calculating,it is found that the bent shaft natural frequency is intensive at low-level frequency segment,there are only two available frequency interval,the current excitation frequency is in the mode frequency interval[15,16],the other available frequency interval is fixed frequency interval[23,24].

This paper discusses the excited magnetic frequency of an inouctive synchronous apparatus under working conditions within the aplitude range,the feeding rate of the working platform, the resolving rate of displacement measurement, the measurement accuracy, and theirrelationship.