The Experts below are selected from a list of 6261 Experts worldwide ranked by ideXlab platform
Anthony J. Weiss - One of the best experts on this subject based on the ideXlab platform.
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Direct positioning of Stationary Targets using MIMO radar
Signal Processing, 2011Co-Authors: Ofer Bar-shalom, Anthony J. WeissAbstract:MIMO radar is a new concept that has recently been proposed as an extension to the multi-static radar systems. We apply the direct position determination (DPD) approach to MIMO radar and obtain maximum likelihood algorithms for a location estimation of a Stationary Target. It is shown that under low signal to noise ratio DPD improves the estimation accuracy with respect to the traditional location methods.
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Direct positioning of Stationary Targets using MIMO radar
Signal Processing, 2011Co-Authors: Ofer Bar-shalom, Anthony J. WeissAbstract:MIMO radar is a new concept that has recently been proposed as an extension to the multi-static radar systems. We apply the direct position determination (DPD) approach to MIMO radar and obtain maximum likelihood algorithms for a location estimation of a Stationary Target. It is shown that under low signal to noise ratio DPD improves the estimation accuracy with respect to the traditional location methods. ?? 2011 Elsevier B.V.
Feng Tyan - One of the best experts on this subject based on the ideXlab platform.
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Analysis of PPN guidance law - A new approach
2013 American Control Conference, 2013Co-Authors: Feng TyanAbstract:In this paper, we analyze the capture region, time to go, cost and impact angle of a classical pure proportional navigation guidance law. Unlike the traditional ways adopted by most of the researchers, the angle of relative velocity is used in this work as the independent variable instead. Through this approach an analytical solution of cost and impact angle can be obtained. Furthermore, the time to go for a Stationary Target is also derived.
Ofer Bar-shalom - One of the best experts on this subject based on the ideXlab platform.
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Direct positioning of Stationary Targets using MIMO radar
Signal Processing, 2011Co-Authors: Ofer Bar-shalom, Anthony J. WeissAbstract:MIMO radar is a new concept that has recently been proposed as an extension to the multi-static radar systems. We apply the direct position determination (DPD) approach to MIMO radar and obtain maximum likelihood algorithms for a location estimation of a Stationary Target. It is shown that under low signal to noise ratio DPD improves the estimation accuracy with respect to the traditional location methods. ?? 2011 Elsevier B.V.
Nak Young Chong - One of the best experts on this subject based on the ideXlab platform.
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RFID-based mobile robot guidance to a Stationary Target
Mechatronics, 2020Co-Authors: Nak Young ChongAbstract:Retrieving accurate location information about an object in real-time, as well as any general information pertinent to the object, is a key to enabling a robot to perform a task in cluttered, dynamically changing environment. In this paper, we address a novel technique for the guidance of mobile robots to help them identify, locate, and approach a Target in our daily environments. To this end, we propose a standard for the use of radio-frequency identification (RFID) systems and develop a prototype that can be easily installed in existing mobile robots. Specifically, when an RF signal is transmitted from an RF transponder, the proposed RFID system reads the transponder-encoded data and simultaneously picks up the direction of the transponder using the received signal strength pattern. Based on the angle of signal arrival, we develop the guidance strategies that enable a robot to find its way to the transponder position. Moreover, to cope with multi-path reflection and unexpected distortions of the signals resulted from environmental effects, we present several algorithms for reconstructing the signals. We demonstrate that an off-the-self mobile robot equipped with the proposed system locates and approaches a Stationary Target object. Experimental results show that the accuracy of the proposed system operating at a frequency of 315 MHz falls within a reasonable range in our normal office environment
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rfid based mobile robot guidance to a Stationary Target
Mechatronics, 2007Co-Authors: Nak Young ChongAbstract:Abstract Retrieving accurate location information about an object in real-time, as well as any general information pertinent to the object, is a key to enabling a robot to perform a task in cluttered, dynamically changing environment. In this paper, we address a novel technique for the guidance of mobile robots to help them identify, locate, and approach a Target in our daily environments. To this end, we propose a standard for the use of radio-frequency identification (RFID) systems and develop a prototype that can be easily installed in the existing mobile robots. Specifically, when an RF signal is transmitted from an RF transponder, the proposed RFID system reads the transponder-encoded data and simultaneously picks up the direction of the transponder using the received signal strength pattern. Based on the angle of signal arrival, we develop the guidance strategies that enable a robot to find its way to the transponder position. Moreover, to cope with multi-path reflection and unexpected distortions of the signals that resulted from environmental effects, we present several algorithms for reconstructing the signals. We demonstrate that an off-the-self mobile robot equipped with the proposed system locates and approaches a Stationary Target object. Experimental results show that the accuracy of the proposed system operating at a frequency of 315 MHz falls within a reasonable range in our normal office environment.
Zhengdong Hu - One of the best experts on this subject based on the ideXlab platform.
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Circular Guidance Law against Ground Stationary Target in Specified Impact Angle
2012Co-Authors: Zhengdong Hu, Xuemei Tang, Yueping WangAbstract:Since to impact the ground Stationary Target in a specified angle is required for some guided missiles, a circular guidance law which only uses the line-of-sight angle information for terminal velocity direction control is derived. The idea of this approach is to guide the missile flying in a series of arcs determined by the specified impact angles and the real-time positions of the missile and the Target. Based on the simple geometry principles, the required velocity inclination angle can be quickly worked out, which is then used for guidance command generation. Simulation results show that compared with the typical optimal guidance law, the circular guidance law presented which is less sensitive to guidance cycle than guidance order delay, is more favorable for overhead-attack motion.
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An adaptive proportional guidance law against ground Stationary Target
2008 2nd International Symposium on Systems and Control in Aerospace and Astronautics, 2008Co-Authors: Zhengdong HuAbstract:According to the problem that perpendicular impact on the ground Stationary Target was required for some guided weapons, the adaptive proportional guidance law with terminal angular constraint was derived, which didnpsilat need range information. On analyzing the longitudinal plane motion equation and lateral plane motion equation in guided phase, the guidance logic for perpendicular impact task was devised. And for the sake of robustness enhancement of the guidance law, an adaptive guidance parameter updating method is presented. Simulation results show that compared with the optimal guidance law, the guidance precision of the adaptive proportional guidance law was less affected by initial flight path angle, control system delay and command updating frequency, but was more affected by signal measurement with jam.
