Results 261 to 270 of about 1,809,715 (303)

Estimation of parameters of the moving target with micro motion in geosar

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
In order to solve the parameters estimation problem caused by the moving target with the micro motion in the GEOSAR model, a technique based on time-frequency distribution and least squares estimation is introduced. The model of micro-motion part can be seen as a narrow band stochastic process, which is close to the reality of the motion. The method is
Jindong Yu, Ze Yu 0002, Chunsheng Li, Jingwen Li 0003, Mingxuan Mei   +4 more
openaire   +1 more source

Event-based laser speckle correlation for micro motion estimation

Optics Letters, 2021
Micro motion estimation has important applications in various fields such as microfluidic particle detection and biomedical cell imaging. Conventional methods analyze the motion from intensity images captured using frame-based imaging sensors such as the complementary metal–oxide semiconductor (CMOS) and the charge-coupled device (CCD). Recently, event-
Zhou Ge, Yizhao Gao, Hayden K.-H. So, Edmund Y. Lam   +3 more
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Optimum design of a parallel micro-motion stage

SPIE Proceedings, 2006
With the development of a parallel micro motion stage, a Pseudo-Rigid-Body model is derived, and simplified as a constant Jacobian matrix, an optimization based on condition number is then made to establish structure parameters, so as to achieve kinematic performance of both workspace and resulotion as demand, while the scale of this stage is ...
Kunpeng Song, Penghao Hu, Wei Wang, Qun Zheng   +3 more
openaire   +1 more source

UWB pulse radar for micro-motion detection

2016 8th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS), 2016
This paper presents a micro-motion detection based on coherent ultra-wide band pulse radar, in the context of improving the general imaging pipeline of through-the-wall radar. The proposed micro-motion detection principle is based on the measurement of the phase difference of the UWB carrier waveform between the transmitted and the received pulse ...
Vincent Merelle, Alain Gaugue, Georges Louis, Michel Menard   +3 more
openaire   +1 more source

Micro-motion Analysis Based on HRRP Sequence

IET International Radar Conference 2013, 2013
Since micro-motion of a target will affect the positions and phases of scatters in high resolution range profiler (HRRP), the methods of micro-motion extraction from the signals of range gates cannot be used. According to the variation features of scatter position, we treat the HRRPs as image sequence and an improved Viterbi algorithm is used to track ...
null Chen Da-qing, null Xie Su-dao, null Zhang Zhe, null Wang Rong-chen   +3 more
openaire   +1 more source

Design of a stiffness-adjustable micro-motion stage

2019 IEEE 9th Annual International Conference on CYBER Technology in Automation, Control, and Intelligent Systems (CYBER), 2019
The manufacturing errors of flexure hinge are accumulated in their operation, which is not conducive to the control of the motion stage and the high manufacturing accuracy leads to high costs. Therefore, a novel micro-motion stage with adjustable stiffness is proposed to ensure that the motion stage has better performance at low cost.
Rui-Qi Li, Bai-Sheng Wu, Zhi-Jun Yang
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Analysis of micro-motion model for radar target

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017
The mechanical dynamics in addition to its bulk translation of the target or any structure on the target is called micro-motion. Micro-motion evokes a frequency modulation in radar echo known as micro-Doppler (m-D) effect which may help to detect specific structures of a target with micro-motion, leading a potential way to realize target identification
Wenchao Li, Boli Xiong, Gangyao Kuang
openaire   +1 more source

Sequential Separation of Radar Target Micro-Motions Based on IRT

IEEE Transactions on Aerospace and Electronic Systems, 2013
A micro-motion sequential separation method based on inverse Radon transform (IRT) is proposed. The method has an accumulation effect and, therefore can adapt to environment with relatively low signal-to-noise ratio (SNR). This method has the capability of antidiscontinuous tracking and thus is suitable in the multi-target tracking scenario. The method
Xiongjun Fu, Honghua Yan, Cai Wang, Xuehui Lei, Meiguo Gao   +4 more
openaire   +1 more source

Workspace investigation of a 3 DOF compliant micro-motion stage

ICARCV 2004 8th Control, Automation, Robotics and Vision Conference, 2004., 2005
This paper investigates the workspace of a three degree-of-freedom (DOF) compliant micro-motion stage with flexure hinges. This micro-motion stage has parallel structure for better stiffness and accuracy than serial structures and is driven by three PZT stack actuators.
Daniel C. Handley, Tien-Fu Lu, Yuen Kuan Yong, Craig Hales   +3 more
openaire   +1 more source

Optimal use of nonlinear electromagnetic force for micro motion wrist

Proceedings. 1991 IEEE International Conference on Robotics and Automation, 2002
A force-sensitive multi-DOF (degree-of-freedom) wrist suitable for force and collision control is presented. Similar kinds of wrists have been developed before but they suffered from insufficiency of power or massiveness. Having practical applications in mind, the authors present a magnetically driven system in which the nonlinear and limited ...
Yoshihiko Nakamura, Yoshihiko Kimura, Gagan Arora   +2 more
openaire   +1 more source