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Pei H.B.,Beijing Institute of Technology | Jiao Q.J.,Beijing Institute of Technology | Jin Z.X.,Electronic Engineering Research Institute
Advanced Materials Research | Year: 2013

Detonation pressure profiles in TNT/RDX and its mixtures with aluminum powders of different particle size have been studied with Manganin piezoresistance gauge. The measured detonation pressure accorded with the calculated detonation pressure. The results show that micrometer aluminum powders reacted with detonation at times of 0.5μs after the peak pressure. Aluminum powders did not react in the detonation zone, and introducing aluminum into explosive would reduce the detonation pressure. Compare with micrometer aluminum powders, nanometer aluminum powders reacted with detonation product more quickly. © (2013) Trans Tech Publications, Switzerland. Source


Zhang F.,Electronic Engineering Research Institute | He P.,Electronic Engineering Research Institute | He P.,Xian Jiaotong University | Ru W.,Electronic Engineering Research Institute | And 2 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2014

The single use of semiconductor switches in some special conditions was studied, especially in the cascade tests. The results show that the switch whose rated current is 30 mA can achieve a stable single discharge with a current of 10 kA. The discharge process was also analyzed. The switch experiences a complicated physical process from conduction to final damage. The circuit topology and the switch installation position have an effect on the output performance. Source


Li Y.,Electronic Engineering Research Institute | Pan Q.,Northwestern Polytechnical University | Zhao C.,Northwestern Polytechnical University | Liu H.,Electronic Engineering Research Institute | Zhang J.,Electronic Engineering Research Institute
Chinese Control Conference, CCC | Year: 2013

For position parameter estimation of aircraft, this dissertation presents a SVD-SURF-based wide-baseline robust scene matching algorithm. Firstly, we build SURF scale space based on the singular value features of real-time image and reference image. By using fast Hessian matrix maximum values, 64-dimensional SURF feature descriptors of aerial images wre calculated. Then, based on the trace of the Hessian matrix, we complete feature points matching. Finally, by using RANSAC algorithm, we removed the outliers for accurate position estimation. Experiments with two real aerial image sequences show that this algorithm is robust to image rotation, scale transformation and noise. © 2013 TCCT, CAA. Source


Zhang F.,Electronic Engineering Research Institute | Yan Z.,Electronic Engineering Research Institute | He P.,Electronic Engineering Research Institute | Jing X.,Electronic Engineering Research Institute | Jin Z.,Electronic Engineering Research Institute
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2012

A capacitor-discharge seed source based on PIC has been designed. In order to charge quickly and effectively, the source takes advantage of the single-chip pulse width modulation(PWM) to produce a linear voltage which can control the DC-DC converter. And as a result, the charging process is constant current charging. Theoretical and experimental results show that, the seed sourcd charges fast, and reduces the loss during charging. Its energy storage is 250 J, and its volume is smaller than 3000 cm 3. The seed source, which can produce more than 2 kA initial current on 100 μH load in calculation, meets the test requirements. Source

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