期刊
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
卷 30, 期 10, 页码 1453-1465出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X19835955
关键词
Magnetorheological fluid damper; shock absorber; variable stiffness and damping
资金
- Australian Research Council [LP160100132, LP150100040, DP150102636]
- National Natural Science Foundation of China [51375468]
- University of Wollongong
- China Scholarship Council
This article presents a novel rotary shock absorber which combines the abilities of variable stiffness and variable damping by assembling a set of two magnetorheological damping units, one of which being placed in series with a rubber spring. This allows the damping and stiffness to be controlled independently by the internal damping and the external damping units, respectively. A test bench was established to verify the variable stiffness and damping functionality. The experimental results for variable damping test, variable stiffness test and co-working test are presented. At the amplitude of 10 degrees and the frequency 0.5Hz, increases of 141.6% and 618.1% are obtained for damping and stiffness separately if the corresponding current increased from 0 to 1 A and from 0 to 2 A, respectively. A mathematical model is then developed and verified to predict the changing of the damping and stiffness. The test results and the simulated model confirm the feasibility of the shock absorber with the ability of varying damping and stiffness simultaneously.
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