Date of download: 7/2/2016 Copyright © ASME. All rights reserved. From: Improving Machine Drive Dynamics: A Structured Design Approach Toward Balancing J. Mech. Des. 2008;130(8): doi: / Ensemble of four cam-based centrifugal pendula, proposed by Beschkine in the 1939 French patent. The curves Si denote internal cam profiles, which impose some prescribed motion to the pendula Mi. Revolute joints connect the pendula to the driving shaft. Figure Legend:

Date of download: 7/2/2016 Copyright © ASME. All rights reserved. From: Improving Machine Drive Dynamics: A Structured Design Approach Toward Balancing J. Mech. Des. 2008;130(8): doi: / Two cam-based input torque balancing mechanisms proposed by Artobolewski in the 1958 Maschinenbautechnik paper : a cam- follower mechanism with a translating roller follower (left) and its kinematic inversion (right). Figure Legend:

Date of download: 7/2/2016 Copyright © ASME. All rights reserved. From: Improving Machine Drive Dynamics: A Structured Design Approach Toward Balancing J. Mech. Des. 2008;130(8): doi: / Simple toggle. As the angle α approaches 90deg, the links come into toggle and the mechanical advantage approaches infinity. However, frictional effects reduce the forces to much less than infinity although still quite high. Figure Legend:

Date of download: 7/2/2016 Copyright © ASME. All rights reserved. From: Improving Machine Drive Dynamics: A Structured Design Approach Toward Balancing J. Mech. Des. 2008;130(8): doi: / Experimental validation of the cam-based centrifugal pendulum, a cam-based input torque balancing mechanism displayed in Fig., while designed and experimentally validated by Demeulenaere : one period of measured torque (solid line) and theoretical torque (dashed line) Mc (N m) for Ω=200,250,300,413.5rpm. While the mechanism functions almost as predicted at Ω=200,250rpm, the response is heavily dominated (peak amplitude of 2280Nm, that is, three times the predicted amplitude) by a resonance phenomenon at Ω=413.5rpm. This resonance phenomenon is due to the addition of a significant amount of rotational inertia to an axis that is not perfectly stiff. Figure Legend: