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	1. A Y-shaped Vibration Energy Harvester
	HU Junhui,TANG Qiang
	Mechanics 18 May 2016
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:The conventional U-shaped impact type vibration energy harvester (ITVEH), which was proposed by our group, has the capability to convert a low-frequency environmental vibration into a high-frequency structural resonance. This feature can be used to enhance the vibration energy harvesting efficiency. In this work, to increase the electric output power of the conventioanl ITVEH under the same vibration excitation conditions, we proposed and fabricated an ITVEH with a Y-shaped frame, and measured its electric output power. Our experiments show that the electric output power of the ITVEH with a Y-shaped frame is two times of that of the ITVEH with a U-shaped frame.
	TO cite this article:HU Junhui,TANG Qiang. A Y-shaped Vibration Energy Harvester[OL].[18 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4690015


	2. Frequency and damping trimming of a microresonator via delayed feedback signals
	HAN Jianxin,ZHANG Qichang,WANG Wei
	Mechanics 28 October 2015
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:A study on an electrically actuated microresonator is carried out to investigate its dynamic characteristic with delayed displacement and velocity feedback signals. The amplitude of AC voltage is relatively smaller than that of DC voltage in real cases, which yields a small amplitude vibration around its equilibrium position. For delayed stability purpose, delay-independent region based on the linearized equation is analytically derived and then numerically verified. Then, the method of multiple scales is used to determine the frequency response equation under primary resonance of the system. Explicit expressions of the effective natural angular frequency and damping ratio are deduced, respectively. Results show that these two types of delayed feedback signals can induce frequency and damping trimming of the system. An ideal situation, when one type of signal can only tune one vibration property, is discussed in detail. Four cases of delay conditions are defined to decouple the two trimming phenomena. Finally, both the perturbation solution and numerical results are used to verify the correctness of our analysis.
	TO cite this article:HAN Jianxin,ZHANG Qichang,WANG Wei. Frequency and damping trimming of a microresonator via delayed feedback signals[OL].[28 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4659192


	3. Fuzzy fractional-order fast terminal sliding mode control for some chaotic micro-components
	HAN Jianxin,ZHANG Qichang,WANG Wei,WANG Jing
	Mechanics 27 October 2015
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:In this paper, a novel fractional-order fast terminal sliding mode control method, based on an integer-order scheme, is proposed to stabilize the chaotic motion of two typical micro-components. Fractional Lyapunov stability theorem is applied to analytically guarantee the asymptotic stability of the system with uncertainties and external disturbances. To reduce chattering, a fuzzy logic algorithm is designed to replace the traditional signum function in switching law. Finally, numerical simulations with both the fractional-order and integer-order control laws are carried out, respectively. Results show that the proposed control law is effective in the suppression of chaos.
	TO cite this article:HAN Jianxin,ZHANG Qichang,WANG Wei, et al. Fuzzy fractional-order fast terminal sliding mode control for some chaotic micro-components[OL].[27 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4659189


	4. Stable configurations of the noncircular cross section elastic rod model with singularity theory
	WANG Wei,LIN Zhi
	Mechanics 08 January 2014
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	Abstract:The stable configuration of elastic rod model under perturbation is researched by using the singularity theory. We consider the reduced Kirchhoff equations of the noncircular cross section elastic rod characterized by the inequality of the bending rigidities. For the possible buckling configurations belong to the minima along the elastic energy curve, it is analogue to the research of static bifurcation of the equilibrium and described as a 2-codimension unfolding. From that we realize the emergency of buckling configuration under perturbation is strongly connected with the correlations between different governing parameters. These correlations can be analytically detected with the variation in the transition set and bifurcation diagrams from the singularity theory. We also find the criterion of the localized buckling process. The process, following the buckling configuration, connects with the homoclinicity in the physical parameter regions and has been verified with numerical simulation in this article.
	TO cite this article:WANG Wei,LIN Zhi. Stable configurations of the noncircular cross section elastic rod model with singularity theory[OL].[ 8 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4580025


	5. The analytical analysis of the asymmetric elastic rod
	WANG Wei,CHEN Tao
	Mechanics 04 January 2014

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