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Zhang J.,China Institute of Technology | Wang H.,Beijing Special Vehicles Research Institute
2nd International Workshop on Education Technology and Computer Science, ETCS 2010 | Year: 2010

This paper proposes a new pitch detection method with the combination of morphology filter and wavelet transform. Before detection, a pre-process based on morphology filter is performed to remove the noise. Then the pitch is detected by wavelet transform. Experiments show that this method can realize pitch period calculation accurately and has a better robustness. © 2010 IEEE. Source


Xin J.-G.,Beijing Special Vehicles Research Institute | Xu Y.-X.,Beijing Institute of Technology | Li C.,Beijing Special Vehicles Research Institute | Gao P.,Beijing Institute of Technology
Binggong Xuebao/Acta Armamentarii | Year: 2014

The response and inflame/initiation of cylinder charge covered with thin shell under the fragment impacts are studied. 1.5 g (∅5.6 mm×7.8 mm) steel fragment is used to impact 3mm thick aluminum plate, thin steel plate, cylinder charges covered with 3mm thick aluminum shell and steel shell, and the experiment process is recorded synchronously with a high-velocity camera. The impact response and inflame/initiation characteristics are analyzed. The research results show that the inflame/initiation of cylinder charge covered with thin shell is mainly caused by the impact and friction of fragment and broken shell pieces, and the temperature of aluminum shell is higher than that of steel shell, so the aluminum shell can be used to increase the probability of inflame/initiation under the high velocity impact. ©, 2014, China Ordnance Society. All right reserved. Source


Wang J.,Beijing Special Vehicles Research Institute | Zhang Y.,Beijing Special Vehicles Research Institute | Ai D.,Beijing Special Vehicles Research Institute | Pan F.,Beijing Institute of Technology
Applied Mechanics and Materials | Year: 2013

The micro-Extended-Analog-Computater(uEAC) is a newly emergent unconventional computing model under research and development. Although, a single uEAC unit can achieve some classic pattern classification problem, the slop of the classification face generated by uEAC is a constant and moves parallely. So a feedforward array structure is proposed for the improvement of uEAC, and Particle Swarm Optimizer(PSO) is utilized to configure the uEAC array. The analysis of the mapping characteristics and numerical experiments both illustrate the effectiveness of the improvement. © (2013) Trans Tech Publications, Switzerland. Source


Wang H.,Beijing Special Vehicles Research Institute | Wang H.,North University of China | Li R.,Beijing Special Vehicles Research Institute | Xue H.,Beijing Special Vehicles Research Institute | Pan H.,North University of China
International Conference on Signal Processing Proceedings, ICSP | Year: 2010

The military vehicles seat vibration is one of the main factors affecting the efficiency of crew. In this paper, the wavelet transfrom is used to analyse the military vehicle seat vibration , the vibration energy distribution in different frequency bands is examined by wavelet energy spectrum.The vibration sources of the seat are recogni/ed.and the vibration characters can be identified by the wavelet-scale energy coefficients. © 2010 IEEE. Source


Wang H.,Beijing Special Vehicles Research Institute | Wang H.,North University of China | Li R.,Beijing Special Vehicles Research Institute | Xue H.,Beijing Special Vehicles Research Institute | And 2 more authors.
2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010 | Year: 2010

The microenvironment factors in the armored vehicle such as the vibration; noise, temperature and the poisonous gas seriously affect the efficiency of the crew. In this paper, the fuzzy comprehensive evaluation and the exposure time of Fatigue Ergonomics lower limits" affected by micro-environment factors are combined, a comprehensive assessment method based on the time index for the armored vehicle micro-environment is established. This method makes the qualitative evaluation to the quantitative evaluation the efficiency of the crew influenced by the microenvironment factors in the armored vehicle. The experimental results show that the model results with the actual situation. © 2010 IEEE. Source

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