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With large scale increases of the train speed, it is of great practical significance to develop a fatigue test stand for high-speed train's transmission system. 3-DOF (three degree-of-freedom) electro-hydraulic shaking table for high-speed train's transmission system fatigue test is designed and its three dimensional mathematical model is established in this paper. In addition, static analysis and...
Using the basic idea of information theory, the probability density of detonating control of PN code phase modulation fuze is researched and the uncertainty factors that leads to burst-point distribution are analyzed. It is pointed out that extending Doppler allowance and suppressing distance sibelobe are the main methods that decrease the uncertainty of detonating control and increase burst-point...
Considering the disability of calibration theories and methods for the tester of automobile wheelbase difference, mechanical analysis of the vehicle stability is employed to dedicate the negative influences of wheelbase difference. A novel device can realize calibration of the wheelbase difference within the range of 0-40 mm by variable wheelbase mechanism is proposed. Two diagnosis systems which...
Based on the analysis on the through-earth communication using the basic principle of information theory, spectrum spreading technology is adopted to solve the problem that the received signal in through-earth communication is weak. And the technology scheme of through-earth communication is designed. Finally the reliability of the scheme is verified by simulation.
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