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The servo motor is widely used in the numerical control system, in order to reduce speed and increase torque, reducer with small volume and large transmission ratio is needed. Planetary gear reducer with two internal gear pairs is known as NN type reducer, it has the advantage of small volume and large transmission ratio so that it is a very suitable selection. This paper takes the reducer design...
With the requirement of hign quality, precision and reliability of worm driving device, it is difficult to fulfil these demands by traditional design method based on formula derivation. Digital technology is a viable means to resolve this problem. In this paper digital expression means of helicoidal surface is presented. Based on research the method to obtain digital helicoidal surface by each kind...
A non-iterative design method on an approximate equal velocity ratio transmission mechanism is presented. The mathematical principle is that a compound function produced by two basic functions, let its one order differential is equal to a constant at special point, and then two to three order derivatives of the compound function are all zeroes, thus two algebraic equations are got, their solutions...
The definition of S transform was respectively deduced from short time Fourier transform and continuous wavelet transform. The simulation experiment indicates that S transform behaves itself with better time-frequency analysis and positioning capability. It is feasible to adopt S transform to investigate the time-frequency characteristics of engine induction noise in acceleration. Engine induction...
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