Experimental validation of complex non-minimum phase zeros in a flexure mechanism
Experimental validation of complex non-minimum phase zeros in a flexure mechanism
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弯曲机构中复杂非最小相位零点的实验验证
DOI:
10.1016/j.precisioneng.2019.08.002
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Awtar, Shorya
中科院分区:
文献类型:
--
作者:
Cui, Leqing;Awtar, Shorya
In this paper, we present the design of an experimental setup that validates the existence of complex non-minimum phase (CNMP) zeros in a flexure mechanism under specific conditions. Using this setup, the dynamics of a lightly damped, nominally symmetric XY flexure mechanism comprising two double parallelogram flexure modules (DPFM) is experimentally studied while varying the operating point and parametric asymmetry. While CNMP zeros have been reported in analytical studies, a direct experimental validation of model-based prediction poses several challenges and is rare in the literature. The challenges addressed in the presented experimental setup design include isolating the specific dynamics of interest while minimizing extraneous dynamics, avoiding friction and backlash in the system to offer clean and repeatable measurements, and employing simple and practical sensing and actuation methods. This experimental setup is used to obtain X direction frequency response measurements and thereby record the presence or absence of CNMP zeros, while varying the Y direction operating point and the mass asymmetry between two DPFMs. This experimental evidence of the existence of CNMP zeros under specific conditions agrees well with the previous model-based predictions.
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DOI:
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发表时间:
1991
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
2018-07
期刊:
Precision Engineering
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DOI:
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发表时间:
2013-10-01
影响因子:
2.3
作者:
Olfatnia, Mohammad;Cui, Leqing;Awtar, Shorya
通讯作者:
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