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Ningbo, China

Bo J.,Ningbo Polytechnic | Wu X.,Changzhou Institute of Technology
Zhongguo Jixie Gongcheng/China Mechanical Engineering

In order to solve the problem of digital design of swashplate axial piston pump in the condition of mechanical and hydraulic coupling, this paper used the co-simulation method to bulid the model and analyse the coupling of the piston pump. A power bond graph theory was used to establish hydraulic model of the piston pump, the piston chamber pressure was defined as the coupling variables. The Lagrange method was used to establish dynamics model of the piston pump, coupling variables in hydraulic model were defined as input variables of mechanics model, and the actual speed measured on mechanic model was defined as the input variable of hydraulic model. The decoupling analysis was finished by the complete mechanical and hydraulic coupling model. Finally, an experimental platform was built to verify the correctness and feasibility of the simulation method, the flow rate and pressure between experiment and simulation were compared, and the foundation for the integrated design of piston pump will be built. Source

Electromagnetic spider web the launch circuit has introduced a lot, but in the center position of the utility of the spider generally have 3 kinds of circuits respectively, the use of single-chip microcomputer circuit of the low energy consumption spider by multi-channel transmission, single circuit receiver circuit. Direct use of the 3 channels of the spider and the use of PLC circuit spider, depending on the actual situation were placed. © Owned by the authors, published by EDP Sciences, 2016. Source

Wei L.,Ningbo Polytechnic
Journal of Convergence Information Technology

The essay has a research to the speed control technology of indexing mechanism of continuously spinning north seeker. As for the process of north seeker, interfered by exterior environmental factor, leading to the indexing mechanism to deflect stable operation and affecting on accuracy of seeking north. In order to improve the accuracy of seeking north, the method of adopting fuzzy self-adapt ion PID is proposed to steadily to control the continuous spinning of north seeker. PID parameter is adjusted in real time according to fuzzy control rule to improve the dynamic and static features of the system. The simulated test indicates that the fuzzy self-adaptor PID control has several advantages in terms of little overshot, fast respond speed, strong anti-intervene ability, good robustness etc. overcoming the defect of PID control parameter depending on system accurate math model, quickly and effectively adjusting to deal with interfering moment in the process of operation, improving the stability of speed of indexing mechanism on north seekers. Source

Liu X.,Ningbo Polytechnic
Lecture Notes in Electrical Engineering

Students are the most active young people, the most creative group, and the Olympic movement is mainstream and core of the contemporary world of sports, sports and culture, it advocated the combination of education and to institutions of higher learning to develop a comprehensive development talent provides a wealth of educational resources. Digging through the "Beijing Olympics" spread the Olympic spirit and give full play to the educational function of sport, to enable students to become moral, intellectual, and physical development of talent. © 2013 Springer-Verlag. Source

Liu X.,Ningbo Polytechnic
Lecture Notes in Electrical Engineering

In order to reflect the important role of sport dance in college physical education, teaching dance classes for College Sports, presented to classroom teaching research, and create a good climate for innovation, and establish a knowledge and innovation, health teaching concepts, and specifically from teaching content, teaching methods, the image of teachers, students self-issued learning were discussed. Practice has proved effective, a deliberate attempt to explore the College Sports Dance Teaching Reform. © 2013 Springer-Verlag. Source

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