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| 1 | Application of Piezoelectric Actuator and Compliant Structures to Achieve Flapping Wing Motion for a MAV显示文摘Micro Aerial Vehicles(MAVs) are the smallest artificial aircraft.Most of the flapping wings MAVs are powered by electric motors of various capacities.We report in this paper the application of piezoelectric actuators as power system for a flapping wing MAV using a compliant displacement amplification mechanism.The actuator used for this application is a pre-stressed cut piece of TH-7R type Thunder actuator.A two-bar compliant mechanism with two flexures has been developed to convert the linear displacement into angular movement and amplification.The specimens were made from carbon fiber links and nylon flexures.We also proposed to use the product of frequency(F) and tip displacement(D), F * D as a criteria for the characterization of an amplifying mechanism.The best specimen according to this criterion is obtained for a 5mm length flexure specimen made of three layers of nylon.The F*D value obtained for this specimen was(0.58) Hz.m.ANSYS finite element analysis results for different flexural thickness and lengths were obtained and have been compared to the experimental results.The effect of both the thickness and length of the flexure on a particular arrangement has been discussed. | Kranti. K. Lal Kummari S. J. Croucher N. J. Lawson E. E. Liani G. Allegri S. Guo Hsien-Chun Chung Z. Huang | 2008 | 材料科学与工程学报2008，26，4： | 3 |
| 2 | Trabecular microfracture precedes cortical shell failure in the rat caudal vertebra under cyclic overloading显示文摘 | Kummari SR Davis AJ Vega LA | 2009 | Calcif Tissue Int2009，85，2： | 1 |
| 3 | Three-dimensional characterization of resorption cavity size and location in human vertebral trabecular bone显示文摘 | M.G. Goff C.R. Slyfield S.R. Kummari E.V. Tkachenko S.E. Fischer Y.H. Yi M.G. Jekir T.M. Keaveny C.J. Hernandez | 2012 | Bone2012，，1： | 1 |
| 4 | Development of piezoelectric fans for flapping wing application显示文摘 | CHUNG H C KUMMARI K L CROUCHER S J | 2009 | Sens Actuators A2009，149，1： | 1 |
| 5 | Laser capture micmdis- section a demonstration of the isolation of individual dopamine neurons and the entire ventral tegmental area 显示文摘 | KUMMARI E GUO-ROSS SX EELLS JB | 2015 | Vis Exp2015，96，52： | 1 |
| 6 | Grain refinement of Al-3.5FeNb-1.5C master alloy on pure Al and Al-9.8Si-3.4Cu alloy显示文摘The refinement potential of Al-3.5 Fe Nb-1.5 C master alloy on pure aluminium and Al-9.8 Si-3.4 Cu alloy has been investigated. Different amounts of Al-3.5 Fe Nb-1.5 C master alloy were added to estimate the optimal addition level. It was found that the addition of Al-3.5 Fe Nb-1.5 C grain refiner can promote significantly the refinement of grains in the pure aluminium, particularly at 0.1 wt.%, with the mean primary aluminium α-grain size reducing to 187±3 μm from about 1-3 mm. Similarly, the microstructural study of the Al-9.8 Si-3.4 Cu alloy die casting at different weight percentages(viz. 0.0 wt.%, 0.1 wt.% and 1.0 wt.%) of Al-3.5 Fe Nb-1.5 C master alloy shows that the Al-3.5 Fe Nb-1.5 C master alloy as a grain refiner is also acceptable for Al-Si cast alloys when the silicon content is more than 4 wt.%. As a result of inoculation with Al-3.5 Fe Nb-1.5 C master alloy, the average grain size of α-Al is reduced to 22±3 μm from about 71±3 μm and grain refining efficiency is not characterized by any visible poisoning effect, which is the major limitation in the grain refinement of Al-Si cast alloys by applying Al-Ti-B ternary master alloys. Mechanical properties such as ultimate tensile strength and yield strength are significantly improved by 9.6% and 9.7%, respectively. | chinna apparao kummari anil kumar birru | 2018 | China Foundry2018，15，4： | 1 |
| 7 | Trabecular microfracture precedes cortical shell failure in the rat caudal vertebra under cyc- lic overloading显示文摘 | Kummari SR Davis A J Vega LA | 2009 | Calcif Tissue Int2009，14，2： | 1 |
| 8 | Sufficiency and Duality for Nonsmooth Interval-Valued Optimization Problems via Generalized Invex-Infine Functions显示文摘In this paper,a new concept of generalized-affineness type of functions is introduced.This class of functions is more general than some of the corresponding ones discussed in Chuong(Nonlinear Anal Theory Methods Appl 75:5044–5052,2018),Sach et al.(J Global Optim 27:51–81,2003)and Nobakhtian(Comput Math Appl 51:1385–1394,2006).These concepts are used to discuss the sufficient optimality conditions for the interval-valued programming problem in terms of the limiting/Mordukhovich subdifferential of locally Lipschitz functions.Furthermore,two types of dual problems,namely Mond–Weir type and mixed type duals are formulated for an interval-valued programming problem and usual duality theorems are derived.Our results improve and generalize the results appeared in Kummari and Ahmad(UPB Sci Bull Ser A 82(1):45–54,2020). | Izhar Ahmad Krishna Kummari S.Al-Homidan | 2023 | Journal of the Operations Research Society of China2023，11，3： | 0 |
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