NDLI: Planar four-bar mechanism including revolute joints with clearance

Content Provider	IEEE Xplore Digital Library
Author	Wang Xing Chen Pei
Copyright Year	2011
Description	Author affiliation: School of Astronautics, Beihang University, Beijing China (Wang Xing)
Abstract	The equations of motion of a four-bar mechanism are derived, which includes the joint clearance and is under the condition of constant crank rotate speed. The contact model for planar revolute joints is based on a continuous contact force model related to the contact conditions. Simulations are performed based on the model for the four-bar mechanism built in MATLAB, for cases at different crank speeds and with different clearance sizes. The results show that the number of impacts and the penetration depth are highly nonlinearly related with the radial clearance and crank speed in low crank rotate speed cases, while the changes of number of impacts and the penetration depth with crank rotate speed become stable when the crank rotate speed is higher than a specific value. The effect of energy loss represented by restitution and friction on penetration depth is also carefully studied. Based on the simulation results, the idea of “Constrain belt” is presented and discussed. Furthermore, the relationship of the value of “Constrain belt” versus stiffness and operating load is plotted and their proportion relation is obtained. At last, two applications of “Constrain belt”, namely, accuracy analysis and clearance design, are pointed out.
Starting Page	692
Ending Page	698
File Size	1431651
Page Count	7
File Format	PDF
ISBN	9781612847191
e-ISBN	9781612847221
DOI	10.1109/MEC.2011.6025560
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Analytical models Friction Force Joint clearance Belts Multibody system dynamics Steady-state Mathematical model Joints Four-bar mechanism
Content Type	Text
Resource Type	Article

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