Practical frequency and time optimal design of passive linear vibration isolation mounts

被引:27
作者
Jazar, GN
Narimani, A
Golnaraghi, MF
Swanson, DA
机构
[1] N Dakota State Univ, Dept Mech Engn & Appl Mech, Fargo, ND 58105 USA
[2] Univ Waterloo, Dept Mech Engn, Canada Res Chair Intelligent Mechatron & Mat Syst, Waterloo, ON N2L 3G1, Canada
[3] Lord Corp, Applicat Dev, Cary, NC USA
关键词
1Department of Mechanical Engineering and Applied Mechanics; North Dakota State University; Fargo; ND; 58105; U.S.A. Tel.: +1 701 231 8303; Fax: +1 701 231 8913; E-mail: Reza.N.Jazar@ndsu.nodak.edu 2Department of Mechanical Engineering; University of Waterloo; 200 University Ave. W; Waterloo; Ont; Canada N2L 3G1. Fax: +1 519 888 6197. 3Address correspondence to: Professor M.F. Golnaraghi; Canada Research Chair; Intelligent Mechatronics and Materials Systems; Department of Mechanical Engineering; Ontario; Canada N2L 3G1. Tel.: (519) 888 4567 (x4753); Fax: (519) 888 6197; E-mail: mfgolnar@uwaterloo.ca 4Applications Development; Lord Corporation; Cary; NC; U.S.A;
D O I
10.1076/vesd.39.6.437.14595
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
In this paper we examine a linear one-degree of freedom vibration isolator mount. The linearity of the system allows us to analyze its frequency and time response characteristics analytically. Optimal damping and stiffness values for the isolator are obtained by minimizing certain cost functions, which are the Root Mean Square (RMS) of the absolute acceleration and the relative displacement. These RMS cost functions are used to create a design chart for the isolator parameters. This is very useful particularly in the presence of physical constraints such as a limit in relative displacement. The time response of the system for a unit step input is also considered to gain an insight into the transient characteristics of the system. We obtain an optimal value for the damping ratio of the system in order to minimize the transmitted acceleration. Combining the frequency and time response analyses leads to an optimal value for the mount natural frequency and damping ratio satisfying both time and frequency domains. The results are verified numerically using measured acceleration as input.
引用
收藏
页码:437 / 466
页数:30
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