Abstract: The conventional localization algorithms based on Euler angle are not sufficient in accuracy and efficiency, and singularity often occurs. Furthermore, the present positioning scheme on the basis of screw theory only adapts to simple surfaces. To overcome these shortcomings, a new strategy was proposed to cope with the complex freeform surfaces in this paper from screw theory. Firstly, the complex surfaces were subdivided into pieces of simple patches. The nearest point to each patch from the measured point was found. Then, the nearest point was located using boundary determinant. So efficiency of the localization algorithm was improved. The experimental results indicate that the approach is not only fast but also accurate. |
Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.
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