Designing dynamically compensated and robust cam profiles with bernstein-bezier harmonic curves

This paper deals with the problem of designing dynamicallycompensated cam proles to minimize residual vibrationsin high-speed cam-follower systems. The traditional Polydynemethod is modied and extended to achieve signicant improvementin residual vibration characteristics. First, cam displacementcurves are represented by Bernstein-Bezier harmoniccurves as opposed to polynomial curves. These recently developedharmonic curves are low in harmonic content and thereforethe resulting cam proles are less prone to induce resonant vibrationsin the follower system. Second, the design procedure isexpanded such that the residual vibrations of the resulting camfollowersystem is not only extinguished at the design speed butalso made insensitive to speed variations. Numerical examplesare given in the end.