Wei Q.,Beihang University |
Jiao J.,Beihang University |
Zhou S.,Luoyang Institute of Electro optical Devices |
Zhao T.,Beihang University
Proceedings of 2015 the 1st International Conference on Reliability Systems Engineering, ICRSE 2015 | Year: 2015
Based on the situation that faults cause hazard in complex equipment system, an accident process meta-model is proposed based on the meta-model theory. The meta-model of the accident process is explained from the implementation view. Four modeling views and the modeling steps of the accident process meta-model are presented based on SysML. Eventually, the method is applied in a case study of Servo of main rotor in flight control system. The result shows that accident path can be found through meta-modeling of accident process. © 2015 IEEE.
Li L.,Xi'an University of Architecture and Technology |
Cai A.-J.,Xi'an University of Architecture and Technology |
Ruan X.-G.,Xi'an University of Architecture and Technology |
Wang Z.-S.,Luoyang Institute of Electro Optical Devices
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | Year: 2015
Within engineering application, the modeling and the solution of the bolted joint are very difficult for its strongly nonlinear characteristics and its coupling with other models. In order to facility engineering application, the contact of two rough surfaces of bolted joints can be modeled by a flat, smooth surface in contact with a rough surface in the first place. Secondly, the restoring force model of bolted joints is demonstrated through Masing hypothesis and the force-displacement relationship of bolted joints. Then, suppose that the bolted joints under the condition of the stability excitation and the small vibration amplitude, we obtain the equivalent linearization stiffness and damping model of bolted joints applying the method of averaging. Finally, the laboratorial platform of modal testing and restoring force are established, and the whole structure model is obtained by the equivalent linearization model of bolted joints coupled with finite element model with finite element method. During a cyclic displacement the theoretical model shows good agreement with experimental results. ©, 2015, Nanjing University of Aeronautics an Astronautics. All right reserved.
Huang H.,Luoyang Institute of Electro optical Devices |
Liu Q.,Luoyang Institute of Electro optical Devices |
Zhao K.,Luoyang Institute of Electro optical Devices
Bandaoti Guangdian/Semiconductor Optoelectronics | Year: 2015
Due to the non-uniformity of the linear array IR detector, there are noises available in the acquired IR images, which affect image's observation and recognition seriously. A local invariable statistical correction method based on bilateral filter constraint is proposed, with the basis of invariable statistical non-uniform correction method, this method adopts bilateral filter for response signal for filtering analysis, and applies constrain limitation in the statistical result according to the scene characteristic. It resolves non-uniformity of original images efficiently as well as avoiding “ghosting” and tailing in existing algorithm. The experimental results indicate that the correction effect of this algorithm is prominent with fast convergence, and it is convenient for engineering implementation, this will enhance the observation quality of IR imaging system extensively. ©, 2015, China National Publishing Industry Trading Corporation. All right reserved.