Abstract:

Aiming at the problem that the mechanical resonance which influenced the responsiveness and stability of the shogging mechanism was easily induced during the high speed operation of the shogging mechanism on tufting carpet loom, the paper designed the compensation device based on a theoretical model of the shogging mechanism. Firstly, the paper adopted a double T type motch filter to eliminate mechanical resonance points of the shogging driving system, based on the s step response. And then the paper used the Tustin prestressing bilinear approximation method to perform discretization on the ontch filter, and compared with the discretization algorithms such as a zero order holder and a first order holder. The results show that the double T type notch filter can well inhibit the mechanical resonance during high speed operation of the shogging mechanism, and the discrete notch filter designed by the Tustin prestressing bilinear approximation method can achieve more accurate approximation effect of the frequency domain characteristics than the zero order holder and the first order holder.

Key words: shogging mechanism, compensation device, resonance inhibition, notch filter, discrete method