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International Conference on Automatic control and Artificial Intelligence, ACAI 2012

作者： Wang, Wei Qu, Kai Zhang, Xiongxing Guo, Ying Science and Technology on Electromechanical Dynamic Control Laboratory Xi'An Institute of Electromechanical Information Technology Xi'an710065 China School of Optoelectronic Engineering Xi'An Technological University Xi'an 710032 China

ISBN: (纸本)9781849195379

In order to keep photodiode signal conditioning circuit could response to the very short pulse when projectiles cross the light mesh, the bandwidth of conditioning circuit should be increased and noise should be avoided. The key influencing factors on the bandwidth limit are analysed, and two optimization methods have been put forward at the same time. In the end, several experimental verification experiments are made to verify the two optimization methods which are put forward previously. The experimental results demonstrate that the former optimization method still could not be applied into the signal conditioning circuit, and the latter could improve the performance.

关键词： Projectiles

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A radar ECCM method based on orthogonal pulse block and two-dimensional frequency domain motion compensation

A radar ECCM method based on orthogonal pulse block and two-...

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IET International Conference on Radar Systems, Radar 2012

作者： Xia, Lei Liu, Nan Zhao, Shanshan Zhang, Linrang Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an Shaanxi 710065 China National Key Lab of Radar Signal Processing Xidian University Xi'an Shaanxi 710071 China

ISBN: (纸本)9781849196765

A radar ECCM method is proposed to combat the repeat jamming. Benfitting from the full-rate orthogonal pulse block design of such method, all the received signals within a pulse block are employed in the match filtering operation for false target cancellation, which improves the SNR of real targets. And the Two-dimensional frequency domain motion compensation automatically removes the impact of target motion on canceling out multiple false targets with different and unknown motion parameters. The numerical examples demonstrate the effectiveness of the proposed method.

关键词： Frequency domain analysis

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The circuit-level simulation of continuous Wave Doppler Fuze detector based on ADS

The circuit-level simulation of continuous Wave Doppler Fuze...

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International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Xiaoyu Gou Hong Su Tie Li Liang Li Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China NO.2 Satellite R&D Center Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China

ISBN: (纸本)9781467317993

Simulation of fuze detector using conventional simulation softwares requires tremendous complicated theoretical calculations. It also can't analyze the impact caused by the nonlinear of the analog devices. A circuit-level simulation method is proposed in this paper to solve this problem, based on the implementation of continuous wave Doppler fuze detector on ADS simulation platform. Continuous Wave Doppler Fuze detector model is built on the ADS platform by using components and Microstrip Line as the same as real circuit and optimizing the analog components parameters by impedance matching. This model launches a Continuous wave signal which has the frequency between 3.36GHz and 3.5GHz, and generates an IF signal of a magnitude between 150mv to 200mv. The results show that this scheme is reasonable and feasible.

关键词： Integrated circuit modeling Detectors Doppler effect Mixers Analytical models Local oscillators

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Radio Fuse Echo CEM Model Based on PO-MoM Algorithm

Radio Fuse Echo CEM Model Based on PO-MoM Algorithm

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International Symposium on Antennas Propagation and EM Theory

作者： Bo Tian Dong Cui Yu Yu Tie Li NO.3 R & D department Science and Technology on Electromechanical Dynamic Control Laboratory

ISBN: (纸本)9781467317993

For the difficulty and low efficiency in calculating the radio fuze echo of complex target with traditional method, the PO-MOM Hybrid computation methodology is introduced to the traditional radio near-field fuze echo computing model. The established model can approximately calculate and quickly access target near-field equivalent RCS with the PO-MOM hybrid algorithm. When combined with the radar equation, the engineering CEM model of target terminal ballistics radio fuze echo signal can be achieved. The result of model validation shows that: the model has a high calculating speed, and the error is less than 25%, so this model can be used in quick simulation of radio fuze echo signal.

关键词： Echoes Radio Model checking Fuses

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Laser scattering polarization characteristics of mist and painted target based on rotation angle

Laser scattering polarization characteristics of mist and pa...

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International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Dong Cui Wei Wang Wei Li Wei Yan NO.3 R & D department Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China

ISBN: (纸本)9781467317993

For the absence of laser polarization characteristics data, which can be used to distinguish between mist and painted metal target, then we have taken a test methods based on rotation angle of polarization of the incident laser, and measured the degree of linear polarization of thin mist and tanker samples, experimental result says: within the scope of the polarization angle of 45°, laser backscattering polarization characteristics have the ability to distinguish between mist and painted metal target samples. In order to verify this phenomenon, we changed frequency and pulse width parameters of the incident laser, then measured middle and high concentrations mist and painted armored vehicle samples. The verification results show that: under different frequency and pulse width of incident laser, with increasing the angle of incident laser polarization, the degree of laser backscattering polarization of mist decrease first and then increase, the minimum value of polarization show in 45°. But the degree of polarization of painted metal target samples do not change significantly, which are greater than middle and high concentration mist in the angle of 45°.

关键词： Measurement by laser beam Frequency measurement Vehicles Laser transitions Coatings Backscatter

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Laser narrow pulse target transient response simulation model

Laser narrow pulse target transient response simulation mode...

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International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Yali Hou Jing Xin Jiao Wei Yan Hong Su NO.3 R&D department Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China

ISBN: (纸本)9781467317993

Research with the foreign target transient response development, calculation method of laser narrow pulse transient response is put forward. Based on laser narrow pulse transient response theory, it is simulated by using mathematical model to get the transient responses of several typical ground and low-altitude targets after analyzing, data analysis indicates that this feature can be directly used for target classification, having large differences in shape and size, confirmed the feasibility of this method can provide data support and technical support for further identification of the target classification.

关键词： Mathematical model Radiation effects Shape Laser modes Transient response Scattering Standards

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A photodiode signal conditioning circuit for projectile velocity measurement

A photodiode signal conditioning circuit for projectile velo...

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International Conference on Automatic control and Artificial Intelligence (ACAI 2012)

作者： Wei Wang Kai Qu Xiongxing Zhang Ying Guo Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an Institute of Electromechanical Information Technology 710065 China School of Optoelectronic Engineering Xi'an Technological University 710032 China

关键词：

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The Fuze Doppler Echo Algorithm of Near-field Electromagnetic Scattering Model

The Fuze Doppler Echo Algorithm of Near-field Electromagneti...

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International Symposium on Antennas Propagation and EM Theory

作者： Xiangjun Li Jing Li Tie Li NO.3 R & D department Science and Technology on Electromechanical Dynamic Control Laboratory School of Electronics and Information Engineering Xi'an Technological University

ISBN: (纸本)9781467317993

A algorithm of fuze terminal trajectory Doppler echo signal is established based on the near-field electromagnetic scattering model and fuze echo model, which can calculating electromagnetic scattering characteristics of CAD model, and the fuze Doppler echo signal. Considering the questions of the shelter of the target and local irradiation, the algorithm mainly uses physical optics method (PO) and equivalent edge currents (EEC). Comparing with the measured data, the analysis shows that the example results using the algorithm mentioned above are, very consistent. The algorithm is reliable, and could provide the basis and approaches for proximity fuze design because of practicality and versatility.

关键词： Echoes Electromagnetic scattering A* Algorithm Doppler effect Scattering characteristics near-field Refugium algorithms Data analysis

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Thermodynamics study of laser fuze at different initial velocities

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Binggong Xuebao/Acta Armamentarii 2012年第SUPPL2期33卷 316-320页

作者： Yue, Ming-Hao Chen, Hui-Min Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing 100081 China

Conventional ammunition laser fuze is usually located in the cylinder at the head of projectile (eg. PX581 mortar projectile). In external trajectory flight, an aerodynamic heating effect usually results from air viscosity, so the temperature on the surface of fuze and its optical lenses may increase, and the thermal strain may occur, which influences the overall power of it and the ammunition. As a result, it is vital to figure out the increase in temperature and thermal strain of fuze. Thermodynamics study of mortar projectile laser fuze at various muzzle velocities was carried out, especially about the aerodynamics heating and thermal strain of the lenses which are located in special geometric position. First, the fluid-structure interaction parameters were calculated utilizing CFD method. Preprocess software ICEM CFD and simulation software FLUENT were utilized. Second, ANSYS WorkBench was used to analyze the thermal strain. The result shows that the increase in temperature doesn't exceed the limit of the optical material, so the function of laser fuze and the power of projectile won't be affected. This paper demonstrates the rationality of material choice of laser fuze optical system.

关键词： Computational fluid dynamics

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Design and realization of a polarized laser fuze without blind area

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Binggong Xuebao/Acta Armamentarii 2012年第SUPPL2期33卷 312-315页

作者： Chen, Hui-Min Cheng, He-Jiao Cai, De Yang, Yu-Ying Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing 100081 China Department of Arms Engineering Academy of Armored Force Engineering Beijing 100072 China

In traditional pulsed laser fuze systems, the emission and receiving optical systems are independent, causing a blind area, and they have little capacity to resist cloud and interference. To solve these problems, a polarized laser fuze without blind area was designed based on the polarized property of laser. For the new laser fuze, a polarized beam splitter was used to realize a mode in which the emitter and receiver use the same aperture. At the same time, its anti-interference capacity was improved by using a nanosecond laser as emitting source. An experimental system was established, in which 1064 nm polarized laser with pulse duration of 1 ns was used, and a photodetector was used as the receiver. The echo characteristics of different objects within the range of 1 m were obtained.

关键词： Pulsed lasers

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