The Characterization of Cam Drive System Windup

1980 ◽  
Vol 102 (2) ◽  
pp. 278-285 ◽  
Author(s):  
L. E. Szakallas ◽  
M. Savage
Keyword(s):  
Nonlinear Vibration ◽  
Dimensional Analysis ◽  
Drive System ◽  
Degree Of Freedom ◽  
Follower Force ◽  
Vibration Level ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
High Speeds

The vibration in a cam driven mechanism due to drive system windup can be a serious problem at high speeds. A single degree of freedom model of this source of vibration shows that it is a self-induced nonlinear vibration. By dimensional analysis, two ratios are established to characterize the level of vibration. Maximum drive system windup and maximum radial follower force ratios are presented in chart form to characterize the vibration level. Systems studied are harmonic and cycloidal rises with open and closed track cam surfaces.

Residual Vibration Criteria Applied to Multiple Degree of Freedom Cam Followers

1981 ◽  
Vol 103 (4) ◽  
pp. 702-705 ◽  
Author(s):  
J. L. Wiederrich
Keyword(s):  
Modal Analysis ◽  
Vibration Characteristics ◽  
Vibration Response ◽  
Degree Of Freedom ◽  
Operating Speed ◽  
Residual Vibration ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Cam Follower

The vibration characteristics of a cam motion are generally presented by plotting the single degree of freedom residual vibration as a function of normalized operating speed. In this paper it is shown that by applying the methods of modal analysis, these residual vibration characteristics can be extended to the characterization of the vibration response of a multiple degree of freedom cam follower system.

Kinematic comparison of single degree-of-freedom robotic gait trainers

2021 ◽  
Vol 159 ◽  
pp. 104258
Author(s):  
Jeonghwan Lee ◽  
Lailu Li ◽  
Sung Yul Shin ◽  
Ashish D. Deshpande ◽  
James Sulzer
Keyword(s):  
Degree Of Freedom ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Robotic Gait
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