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Cai Y.-X.,The First Engineers Scientific Research Institute | Zhou Z.-Y.,The First Engineers Scientific Research Institute | Xu X.-Q.,The First Engineers Scientific Research Institute | Bi D.-K.,The First Engineers Scientific Research Institute
Binggong Xuebao/Acta Armamentarii | Year: 2015

The design of coating structure is an important method to achieve the favorable absorbing capability. For the issues in the computer-aided design of cpating structure, such as low operation efficiency, optimization of single target and manual intervention, a multi-objective optimization model of radar absorbing coating with the aim of “thin-layer, light-weight, broad-band and strong-absorbing” is constructed, and an optimized project based on NSGA-II is presented. The optimized thickness of the double-layer absorbing coating composing of 3# and 2# materials is 0.6 mm with the reflectance of lower than -8 dB at 18~18 GHz band. Experiments show that this method can be used for the structure design of multilayered radar absorbing coating in case of prediction of redundancy. © 2015, China Ordnance Society. All right reserved.


Han J.,The First Engineers Scientific Research Institute | Chen G.-J.,The First Engineers Scientific Research Institute | Wang H.-J.,The First Engineers Scientific Research Institute
Jiefangjun Ligong Daxue Xuebao/Journal of PLA University of Science and Technology (Natural Science Edition) | Year: 2010

With Denavit-Hatenberg homogeneous transform matrix, the kinematics model of a four-freedom excavating device was constructed and the functions of all revolving joints based on the basal reference frame were established to analyze the mechanics property of the excavator working device. According to the connecting relationship and driven modes of the joints, the optimum analytic models of the maximum excavating forces in the conditions of arm excavating and bucket arm excavating were set respectively. Furthermore, the distribution characteristics of the maximum excavating forces, the tilting moments and the horizontal acting forces in the excavating area were obtained. Thus the foundations of the design, the stability analysis, and the safety control of the four-freedom excavating devices were provided. The proposed optimal method is reliable and simple, and has important practical value for industrial applications.


Xie W.,The First Engineers Scientific Research Institute | Zhou Z.-Y.,The First Engineers Scientific Research Institute | Cai Y.-X.,The First Engineers Scientific Research Institute | Mu J.-Y.,The First Engineers Scientific Research Institute
Binggong Xuebao/Acta Armamentarii | Year: 2015

Digital pattern is a new camouflage technique, which has better camouflage effect. For the problem of low efficiency of artificial painting, four detection techniques, such as the 3D square grid modeling of military equipment, the 3D digital pattern model generation, the spraying automatic path planning and the real time detection of lance position, are solved. A digital pattern automatic painting system is constructed. Test results show that the application of automatic system can effectively improve the painting efficiency of digital pattern, and promote the further development of digital pattern technology. © 2015, China Ordnance Society. All right reserved.


Cai Y.-X.,The First Engineers Scientific Research Institute | Xue S.-Q.,The First Engineers Scientific Research Institute | Zhou Z.-Y.,The First Engineers Scientific Research Institute | Huang Y.,Unit 77208 of PLA
Binggong Xuebao/Acta Armamentarii | Year: 2016

Painting camouflage is an important camouflage technique. Digital camouflage is an effective means against high-resolution imaging reconnaissance. How to achieve the effectiveness, precision and intelligence of camouflage design technology is always a reseach focus. The texture features of background image are extracted based on FBM fractal dimension estimation method, and the dominant color features of background image are extracted based on pyramid structure fuzzy C-means cluster (FCM) clustering algorithm. The digital camouflage patterns conforming to the characteristics of background are generated based on the improved diamond-square algorithm. The simulation results show that the proposed algorithm is used to achieve the preferable results of pattern generation in desert, jungle, forest land backgrounds. © 2016, China Ordnance Society. All right reserved.


Liu P.,The First Engineers Scientific Research Institute | Jiang J.P.,The First Engineers Scientific Research Institute | Sun B.L.,The First Engineers Scientific Research Institute
Advanced Materials Research | Year: 2013

T2 red copper plate and DT4C electrical pure iron plate were cladded by explosive welding. Microcosmic analysis and bonding strength of the bonding interface were also studied. Results indicate that the welded zone appears periodical wavy metallurgical interface and obvious element diffusion occurs in the interfacial zone. In addition, no separation happens after the bonding strength test and tension-shear test and the broken zone takes place in the T2 red copper part of the samples, indicating that the bonding strength of the welded interface can get no less than the strength of T2 red copper. © (2013) Trans Tech Publications, Switzerland.


Li H.,The First Engineers Scientific Research Institute | Wang B.,The First Engineers Scientific Research Institute | Shen D.,The First Engineers Scientific Research Institute | Zhong X.,The First Engineers Scientific Research Institute
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2015

To solve power supply problem of wireless network nodes for floating bridge status monitoring system, this paper designs a kind of self-sustaining piezoelectric power supply. It converts the mechanical energy which produced in the floating bridge's work environment into vibration excitation source, so as to extend the load's continuous effect and correspondingly extend the power supply time. The ANSYS software was used to simulate the dynamic power generation characteristics of self-sustaining piezoelectric structure carry out the qualitative analysis of the effect of principle of the relevant parameters on the power generation characteristics. Then the Maxite hammer machine test system was built to simulate the impact test. The research results show that the new power supply is able to collect the impact energy efficiently, and improve the electromechanical conversion efficiency greatly. ©, 2015, Yadian Yu Shengguang/Piezoelectrics and Acoustooptics. All right reserved.


Ye H.,Hefei University of Technology | Yuan Z.,Hefei University of Technology | Zhang S.,The First Engineers Scientific Research Institute
Journal of Bionic Engineering | Year: 2013

Understanding the heat and mass transfer processes of plant leaves is essential for plant bionic engineering. A general thermophysical model was established for a plant leaf with particular emphasis on the transpiration process. The model was verified by the field measured stomatal resistance and temperature of a camphor leaf. A dynamical simulation revealed that diurnal transpiration water consumption is dominated by the solar irradiance and the day-average temperature of the leaf is dominated by the ambient air temperature; transpiration plays an important role in the cooling of the leaf, in average it could dissipate around 32.9% of the total solar energy absorbed by the leaf in summer. To imitate the thermal infared characteristic of the real leaf, the up surface of the bionic leaf must have emissivity and solar absorptivity close to those of a real leaf and its shape and surface roughness must be similar to those of the real leaf. The key point is that the bionic leaf must be able to evaporate water to simulate the transpiration of a plant leaf, appropriate adsorbent can be used to realize this function. © 2013 Jilin University.


Han J.,The First Engineers Scientific Research Institute | Chen G.,The First Engineers Scientific Research Institute | Li W.,The First Engineers Scientific Research Institute | Jin H.,Nanjing University of Aeronautics and Astronautics | Zhao C.,The First Engineers Scientific Research Institute
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2012

An oscillating combined steering mechanism was introduced. With Denavit-Hatenberg homogeneous transformed matrix, the kinematics model of the steering mechanism was constructed. The multi-objective optimization method for designing the location of key hinge was proposed. The engineering illustration of steering mechanism was calculated, and the result was proved by the ADAMS software. Some characteristics of steering mechanism, such as the asymmetry of steering drive oil cylinder control, steering smoothness, skidding behavior, and symmetrical distribution were analyzed. The proposed method was reliable and simple, and had important practical value for engineering applications. The steering mechanism had some merits, such as small turn radius, little side slide, easily controllable, it will have wide applied range in engineering vehicle.


Wu J.-Y.,The First Engineers Scientific Research Institute | Zhang S.-Q.,The First Engineers Scientific Research Institute | Yin D.-F.,The First Engineers Scientific Research Institute
Binggong Xuebao/Acta Armamentarii | Year: 2015

The infrared false-color imaging detection technology has been paid attention to. With the development of the remote sensing technology in recent years, the infrared false-color imaging detection has widely been used in the detection of vegetation, ground resources and aquatic pollution. And with the development of digital technology, the traditional photographic film would phase out. The false color film has stopped production in our country. A solution of using digital camera and near-infrared filter to achieve infrared false-color imaging is proposed by analyzing the principle of infrared false-color imaging by traditional false color film, and the algorithm is verified by experiment. © 2015, China Ordnance Society. All right reserved.


Lu Y.-L.,The First Engineers Scientific Research Institute | Mu J.-Y.,The First Engineers Scientific Research Institute
Binggong Xuebao/Acta Armamentarii | Year: 2015

In order to research the relationship between the physical values of coating aging in the natural environment and the environmental factors, a genetic BP neural network with real coding, arithmetic crossover, Gauss mutation and climbing operation is designed. The physical values of coating are calculated according to the environmental factors. Visual Studio 2008 is used for programming, and a program is developed for neural network training and prediction program. Finally, an example of field aging data of coating is used for network training and prediction. The results show that the proposed model can be used to calculate the ultimate life of the coating. The calculated values are similar to the measured values. The genetic neural network model can be used for prediction of coating life. © 2015, China Ordnance Society. All right reserved.

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