Dynamic response and dynamic accuracy reliability of planar mechanism with multiple lubricated clearances

• Published in: Multibody system dynamics Vol. 57; no. 1; pp. 1 - 23
• Main Authors: Chen, Xiulong, Gao, Shun
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.01.2023; Springer Nature B.V
• Subjects: Accuracy; Automotive Engineering; Clearances; Control; Dry friction; Dynamic models; Dynamic response; Dynamical Systems; Electrical Engineering; Engineering; Kinematics; Lagrange multiplier; Lubricants; Mechanical Engineering; Mechanical systems; Model accuracy; Optimization; Reliability analysis; Vibration; Dynamic response; Dynamic accuracy reliability; Planar mechanism; Lubricated clearance
• ISSN: 1384-5640; 1573-272X
• DOI: 10.1007/s11044-022-09853-w

In common mechanical systems, lubricant is usually added to joint clearance of kinematic pair, so as to improve the motion accuracy of the mechanism. However, most of research on mechanisms with lubricated clearance focus on simple mechanisms with single clearance, whereas less research has been done on complex mechanisms with multiple lubricated clearances. At the same time the research on the reliability of mechanisms with clearances often focusses on kinematic accuracy reliability with dry friction clearances, whereas less research has been done on dynamic accuracy reliability with lubricated clearances. Therefore, in this paper, we take the 2-DOFs 9-bar mechanism as a research object and analyze the dynamic response and dynamic accuracy reliability of slider considering multiple lubricated clearances. We establish the dynamic model of the mechanism with lubricated clearances based on the Lagrange multiplier method and the dynamic accuracy reliability model of the mechanism according to the first-order second-moment method. Then we analyze and compare the impact of dry friction clearances and lubricated clearances on dynamic response and dynamic accuracy reliability of the mechanism under different driving speeds and clearance values. This research provides a basis for the dynamic prediction and reliability design of the mechanism.