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Design of a flexible piezoelectric microgripper based on combined amplification principles 被引量:1
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作者 Xiaodong Chen Zilong Deng +2 位作者 Siya Hu Jinhai Gao Xingjun Gao 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2019年第3期138-143,共6页
Aiming to address the problem of the low amplification ratio of traditional microgrippers,a two-stage microgripper based on the principle of combined amplification was designed with a high amplification ratio and larg... Aiming to address the problem of the low amplification ratio of traditional microgrippers,a two-stage microgripper based on the principle of combined amplification was designed with a high amplification ratio and large displacement,using a simple and compact structure.The relationship between theoretical input variables and output variables were first calculated by a projection theorem.Secondly,the performance of the microgripper was analyzed by finite element analysis(FEA).Finally,the accuracy of the theoretical calculation and FEA was verified experimentally.The results show that the microgripper has high magnification and can be gripped in parallel,with self-adaptability for many irregular shaped micro objects.The actual magnification was 23.2×,which is greater than similar products. 展开更多
关键词 MICROGRIPPER High magnification Projection theorem FEA Experimental verification
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On a Discrete Version of Alexandrov's Projection Theorem
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作者 Huan XIONG 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2013年第8期1597-1606,共10页
In this paper, we consider a discrete version of Aleksandrov's projection theorem. We prove that an origin-symmetric convex lattice set, whose lattice's y-coordinates' absolute values are not bigger than 2, can be ... In this paper, we consider a discrete version of Aleksandrov's projection theorem. We prove that an origin-symmetric convex lattice set, whose lattice's y-coordinates' absolute values are not bigger than 2, can be uniquely determined by its lattice projection counts if its cardinality is not 11. This partly answers a question on the discrete version of Aleksandrov's projection theorem which was proposed by Gardner, Gronchi and Zong in 2005. 展开更多
关键词 Aleksandrov's projection theorem convex lattice set discrete geometry
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A novel suboptimal algorithm for state estimation of Markov jump linear systems 被引量:1
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作者 Liu, Wei Zhang, Huaguang +1 位作者 Fu, Jie Wang, Zhanshan 《控制理论与应用(英文版)》 EI 2011年第2期148-154,共7页
This paper is concerned with state estimation problem for Markov jump linear systems where the disturbances involved in the systems equations and measurement equations are assumed to be Gaussian noise sequences.Based ... This paper is concerned with state estimation problem for Markov jump linear systems where the disturbances involved in the systems equations and measurement equations are assumed to be Gaussian noise sequences.Based on two properties of conditional expectation,orthogonal projective theorem is applied to the state estimation problem of the considered systems so that a novel suboptimal algorithm is obtained.The novelty of the algorithm lies in using orthogonal projective theorem instead of Kalman filters to estimate the state.A numerical comparison of the algorithm with the interacting multiple model algorithm is given to illustrate the effectiveness of the proposed algorithm. 展开更多
关键词 State estimation Markov jump Linear systems Orthogonal projective theorem
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