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Hua-Kun Jia, Lian-Dong Yu, Hui-Ning Zhao and Yi-Zhou Jiang
In this article, a method of error source analysis and detection to improve the angle measurement accuracy of rotary encoders in precision measuring instruments is proposed. The angle measurement error caused by the installation eccentricity of the grati...
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Xinghua Li, Xiaohuan Yang, Lingyu Gao, Zhikun Su, Xuan Wei, Zekui Lv, Jiaqi Liang, Haopeng Li and Fengzhou Fang
Error compensation technology offers a significant means for improving the geometric accuracy of CNC machine tools (MTs) as well as extending their service life. Measurement and identification are important prerequisites for error compensation. In this s...
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Xinghua Li, Jue Li, Xuan Wei, Xiaohuan Yang, Zhikun Su, Jiaqi Liang, Zhiming Yang and Fengzhou Fang
Freeform surface is one of the research focuses in the measurement field. A composite module is composed of a plane and rotating paraboloid. The composite module array can identify 21 geometric errors of the machine tool in a wide range, which is compose...
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Haoyuan Cheng, Qi Chen, Xiangwei Zeng, Haoxun Yuan and Linjie Zhang
In response to the critical need for autonomous navigation capabilities of underwater vehicles independent of satellites, this paper studies a novel navigation and control method based on underwater polarization patterns. We propose an underwater course ...
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Xuan Wei, Zhikun Su, Xiaohuan Yang, Zekui Lv, Zhiming Yang, Haitao Zhang, Xinghua Li and Fengzhou Fang
In order to improve the accuracy of the linear motion of computer numerical control (CNC) machine tools, a novel method based on a new type of 1-D (1-dimensional) artifact is proposed to measure the geometric errors. Based on the properties of the displa...
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Ming-Xian Lin and Tsung-Han Hsieh
This study implemented the measurement results and administrative information obtained from the hole plate into the Digital Calibration Certificate (DCC). The DCC comprises three parts: Norms and Standards, Hierarchical Structure, and XML as Exchange For...
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Hao Yang, Xibin Bai and Shifeng Zhang
This paper proposed a multi-view surface array to enlarge the field-of-view (FOV) from 45° × 45° to 72° × 75° and improve the estimation precision of guidance information. First, based on circular and rectangular FOV sensors, the superposition characteri...
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Kelin Lu, Bingyu Jin and Ning Zhang
The radome refraction problem gives rise to guidance performance deterioration for homing missiles. Aiming to eliminate the effect of radome refraction on the radar seeker, a novel method is proposed for correcting the radome-induced measurement error by...
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Tianyan Chen, Jinsong Lin, Deyu Wu and Haibin Wu
Based on the current situation of high precision and comparatively low APA (absolute positioning accuracy) in industrial robots, a calibration method to enhance the APA of industrial robots is proposed. In view of the ?hidden? characteristics of the RBCS...
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I Putu Adi Surya Gunawan, Riyanto Sigit, Agus Indra Gunawan
Every person has different location of veins, some veins are easily detected because it is visible due to thin tissue, and the other are invisible. This different location of veins causes intravenous access procedures and the procreas of intravenous ther...
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Yifan Shang, Wanneng Yu, Guangmiao Zeng, Huihui Li and Yuegao Wu
Image recognition is vital for intelligent ships? autonomous navigation. However, traditional methods often fail to accurately identify maritime objects? spatial positions, especially under electromagnetic silence. We introduce the StereoYOLO method, an ...
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Bin Li, Pan Tang, Haotian Xu and Duo Zheng
The problem of the terminal impact angle control guidance law, considering the target observability for passive guidance with bearing-only measurement, is investigated in this paper. Modified line-of-sight (LOS) angle error dynamics and their closed-loop...
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Yong Zhang, Yi Han, Ruonan Yu, Zhen Yang, Zhengjia Wang and Jianlong Zhang
The pose measurement and motion estimation of long-distance space CubeSats is a difficult problem for autonomous rendezvous and track maintenance. In this work, an approach is proposed for the pose estimation of CubeSat based on the micro-Doppler effect ...
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Yusong Wang, Yidi Wang, Wei Zheng, Minzhang Song and Guanghua Li
X-ray pulsar-based navigation (XNAV) is a promising autonomous navigation method, and the pulse phase is the basic measurement of XNAV. However, the current methods for estimating the pulse phase for orbiting spacecraft have a high computational cost. Th...
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Hojong Choi, Joo-Youn Jo and Jae-Myung Ryu
An omni-directional optical system can be used as a surveillance camera owing to its wide field angle. In cases in which a system is designed with a central screen obscuring structure to increase the resolution of the off-axis field, however, the convent...
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Hongfang Chen, Bo Jiang, Hu Lin, Shuang Zhang, Zhaoyao Shi, Huixu Song and Yanqiang Sun
This paper proposes a calibration method for angular positioning deviation of a high-precision rotary table based on the laser tracer multi-station measurement system. The algorithm error of the calibration method for angular positioning deviation of a h...
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Liqi Zhang and Yonghui Zhao
Based on measured gust information, a multi-input multi-output (MIMO) adaptive feed-forward control scheme for gust load alleviation (GLA) on a semi-span flying-wing aircraft using multiple control surfaces is proposed. In order to remedy weight drift an...
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Shuai Ma, Jun Hu, Xuegao Wang and Jiajia Ji
To make measurement of end-wall flow between blade rows in a compact multistage configuration possible, a miniature L-shaped five-hole probe was employed in this paper. This compact tip structure, realized by laser-printing instead of the conventional ma...
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Jia Zheng, Jincai Chen, Xinjian Wu, Han Liang, Zhi Zheng, Chuanbo Zhu, Yifan Liu, Chao Sun, Chuanqin Wang and Dahua He
As an important sensor of an unmanned surface vehicle (USV), an electro-optical device is usually used to detect ships and obstacles in USV autonomous navigation and collision avoidance. However, the installation perpendicularity error of the electro-opt...
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Zhipeng Li, Bonan Wang, Xianbin Wang, Chao Zhang and Xu Meng
A sensor for measuring the crankshaft angle of the main engine in ships is designed. Compared with the existing crankshaft angle encoder, this design?s advantage is that there is no need to add a gear system at the free end of the crankshaft, reducing ma...
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