Ordnance Engineering College

Shijiazhuang, China

Ordnance Engineering College

Shijiazhuang, China
Time filter
Source Type

Sen Y.,Ordnance Engineering College | Xiao S.,Beihang University
Proceedings of 2016 IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2016 | Year: 2017

Aiming at the problems of traditional classification methods, a SVM binary tree multi-classification method based on Improved Binary-coded quantum particle swarm optimization (IBQPSO) is proposed in this paper. First, IBQPSO algorithm and its steps are presented and multi-classification SVM based on binary tree is discussed. Then, the presented method and procedures are analyzed. Finally, taking the biquadratic filter circuit as an example to do the simulation experiment, the result shows that the proposed method is efficient. © 2016 IEEE.

Lv C.,Ordnance Engineering College | Xie P.,Ordnance Engineering College
IOP Conference Series: Earth and Environmental Science | Year: 2017

Pulse load will make the micro-grid public bus power to produce a high peak pulse due to its cyclical pulsation characteristics,, and make the micro-grid voltage fluctuations, frequency fluctuations, voltage and current distortion, power factor reduction and other adverse effects. In order to suppress the adverse effects of the pulse load on the microgrid and improve the power quality of the microgrid, this paper established the SVG simulation model in Matlab / Simulink environment, the superiority of SVG is verified by comparing the improvement of power quality before and after adding the SVG to microgrid system. The results show that the SVG model can suppress the adverse effects effectively of the pulse load on the microgrid, which is of great value and significance to the reactive power compensation and harmonic suppression of the microgrid. © Published under licence by IOP Publishing Ltd.

Liu Z.,Ordnance Engineering College | Jiang T.,Ordnance Engineering College
2017 2nd Asia-Pacific Conference on Intelligent Robot Systems, ACIRS 2017 | Year: 2017

Aiming at the problem that the traditional artificial potential field (APF) can not adapt to the complex planning space and fall into the local optimal solution, an improved artificial potential field method is proposed for two-dimensional UAV route planning. This method does not consider the influence of traditional attraction and repulsive force, but abstracts the two - dimensional programming space into a three - dimensional artificial potential field function, which makes the aircraft move to the low potential field intensity field in the potential field. And introduced a new search method. Experimental results show that this method can effectively solve the problem of UAV route planning and can effectively avoid the local optimal solution. © 2017 IEEE.

Chen G.-Y.,Ordnance Engineering College | Wang Y.-F.,Ordnance Engineering College
IOP Conference Series: Earth and Environmental Science | Year: 2017

This paper summarizes the requirement of X-ray pulsar navigation and the development of X-ray detector. The difficulties of pulsar navigation in space environment are pointed out. The lack of detectors in terms of detection efficiency, time resolution and load is discussed. Finally, some suggestions are given for future research in X-ray pulsar navigation. © Published under licence by IOP Publishing Ltd.

Wu B.-Y.,Ordnance Engineering College | Ma Y.-H.,Ordnance Engineering College
2016 2nd IEEE International Conference on Computer and Communications, ICCC 2016 - Proceedings | Year: 2017

As for bistatic radar system, the effect of time synchronization error on the system range detection accuracy is studied. By selecting the bistatic forward scattering radar system as the research object, the influences on the accuracy of the system is analysed under different time synchronization errors and different embattling modes. Based on the simulation results, some suggestions about the embattling mode of the bistatic radar system is proposed. © 2016 IEEE.

Gao H.C.,Ordnance Engineering College
Advanced Materials Research | Year: 2013

Due to the emergence of more and more composite armor target, the research related with interval has real application background. The target board with interval structure form attenuates jet penetration effectively. If the interval target and homogeneous target can build equivalent relations, with a certain thickness of the interval target equivalent instead of a homogeneous target board, it will slash test cost and save money. After the target principle and research method, the jet penetration interval target for energy consumption, the jet penetration depth interval target researches are simple introduced, finally the research direction of interval target is put forward with own suggestions. © (2013) Trans Tech Publications, Switzerland.

Li J.,Ordnance Engineering College
Guangdian Gongcheng/Opto-Electronic Engineering | Year: 2010

The mechanism of precision tracking turntable was designed. The entity model of the precision optoelectronic tracking turntable frame was established and the static and dynamic analysis of the precision turntable was done by using the software ANSYS. The static analysis results show that the intensity and rigid requirements of tracking turntable frame were satisfied. The mode analysis indicated that the precision optoelectronic tracking turntable frame had good dynamic characteristics, and synonym did not occur. The rationality of turntable frame was validated by analysis results, and it provided the important evidence for the optimization design of precision optoelectronic tracking turntable.

Kong D.,Ordnance Engineering College | Shen X.,Ordnance Engineering College
Optics and Laser Technology | Year: 2014

A multiple-image encryption scheme based on the optical wavelet transform (OWT) and the multichannel fractional Fourier transform (MFrFT) is proposed. The scheme can make full use of multi-resolution decomposition of wavelet transform (WT) and multichannel processing of MFrFT. The mentioned properties can achieve the encryption of multi-image and the encryption of single image. When encryption finished, each image gets its own fractional order and independent keys. Analysis of encrypted effects has been completed. Furthermore, the influence of WT type and order are analyzed, and the application and analysis of MFrFT are accomplished as well. Numerical simulation verifies the feasibility of the scheme and shows that the problem of insufficient capacity is better solved, and the flexibility of scheme increases. A simple opto-electronic mixed device to realize the scheme is proposed. © 2013 Published by Elsevier Ltd. All rights reserved.

Lu C.-H.,Ordnance Engineering College | Bai H.-B.,Ordnance Engineering College
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2011

By means of analyzing vibration isolation mechanism of combined positive stiffness and negative one, a new type ultra-low passive vibration isolation system was designed here. The combination of negative stiffness mechanism and positive stiffness spring was used in this isolator so that it possessed higher supporting stiffness and ultra-low vibration stiffness, and its stiffness revealed nonlinear characteristics. This system solved the problem of ultra-low frequency vibration isolation in traditional passive vibration isolators. By analyzing the mechanical characteristics of this system, the expressions for the stiffness of the system and the zero stiffness condition of the system at the equilibrium position were deduced, they offered theoretical guides for designing new type nonlinear ultra-low frequency vibration isolators.

Lu B.,Ordnance Engineering College
Dianbo Kexue Xuebao/Chinese Journal of Radio Science | Year: 2013

Aiming at the problem of target effect in sidelobe canceller, polarization filtering technique based on oblique projection operator is introduced into sidelobe cancellation system, and a new method to eliminate target effect is presented. This new method estimates jamming signal polarization parameters, and calculates oblique projection operator; The calculated oblique projection operator acts on accessory channel echo, as a result, the jamming signal extracted from the echo and target signal is entirely rejected. Compared with normal polarization filtering methods, this new method can reject target signal entirely and improve cancellation ratio greatly, only jamming signal polarization parameters needed. Theory analysis and computer simulation prove the validity of this method. © 2013 by Editorial Department of Chinese Journal of Radio Science.

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