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In view of the problem that it is difficult to accurately describe the dynamic working principle of the system and reproduce the motion control function of the real system when the virtual reality technology of the complex system is applied, the hydraulic six degrees of freedom (six-DOF) parallel mechanism with high order, nonlinear, strong coupling and other characteristics was used as the research object, and a virtual reality technology using user datagram protocol (UDP) was proposed between the professional software MATLAB and the virtual reality development software Unity3D. Firstly, the three dimensions (3D) model of the parallel mechanism was built in the 3D modeling software SolidWorks, and the model was imported into the Unity3D software and the joint constraints were applied on it. Secondly, the inverse kinematics of the parallel mechanism was solved, and the joint simulation model of the MATLAB software and the AMESim software was established. Finally, through UDP, Two-way real-time data interaction was realized between the MATLAB software and the Unity3D software, and the virtual mechanism was drove to action. The results show that the actions of the virtual mechanism are fully conformed to the working principle of the real physical system, and the virtual reality technology based on the UDP data-driven is good accuracy and real-time performance. [ABSTRACT FROM AUTHOR]

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Aiming at the problem that the traditional software protocol stack can not meet the performance requirement of high-speed data transmission, this paper presents a design scheme of UDP protocol stack based on hardware acceleration. The design is based on the characteristics of efficient and parallel hardware to implements the UDP/IP protocol stack. and solves the problem of poor performance of high-speed data transmission. The actual test shows that the design can reach the highest level. To 9.32 Gbps transmission rate, it meets the need of 10 Gbps bandwidth downlink speed processing. Compared with traditional software implementation, it shows that the processing capacity of the proposed method is closer to the theoretical limit. [ABSTRACT FROM AUTHOR]

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In view of problems of low automation degree and high time and labor cost of static test method of mine personnel positioning accuracy, a mine personnel positioning accuracy verification system based on Hall sensing was proposed. The system uses public UDP interface to interface with different types of positioning base stations of different manufacturers, uses proprietary UDP interface to transmit related ranging messages of Hall sensing device, and uses production-consumption model to collect, parse and store communication data. The Hall ranging result is used as the reference data, and the node positioning distance information collected by positioning base station is compared in real time, so as to verify accuracy of the positioning system. The test results show that the minimum ranging error rate of the system itself is 0.80%, the maximum error rate is 3.30%, and the average error rate is 1.38%, which is much lower than the 5% error rate allowed by the personnel positioning accuracy verification system. The results of accuracy verification application example show that the system can effectively verify the accuracy of positioning system.

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)