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Guo Y.,PLA Second Artillery Engineering University | Liu X.-X.,PLA Second Artillery Engineering University | Wang C.-H.,Second Artillery Equipment Research Institute
Dandao Xuebao/Journal of Ballistics

To improve the accuracy of tracking ballistic missile at free-flight phase, the accurate model of non-maneuvering ballistic missile at free-flight phase was constructed in mixed coordinate system. To improve the adaptability to maneuvering ballistic target, the system dynamics model of ballistic missile maneuvering at free-flight phase was presented combined with Singer and current statistical model, and the interaction multi-models(IMM)was used to track the missile. To avoid the effect of the flicker noise in the tracking data, the IMM-UPF algorithm was proposed, and it was compared to EKF, UKF and UPF respectively. The simulation results show that the IMM-UPF has better adaptability to the maneuvering ballistic target and the flicker noise of target's data, and it has high accurate tracking ability than EKF, UKF and UPF. ©, 2015, Nanjing University of Science and Technology. All right reserved. Source

Hu H.,Beihang University | Yao J.,Beihang University | Yang J.,Beihang University | Miao S.,Beihang University | Wang S.,Second Artillery Equipment Research Institute
IEEE International Conference on Industrial Engineering and Engineering Management

An assessment method for Step-down-stress accelerated life test data based on Bayesian theory is proposed in this paper. For the problem of the limited test information gained in the small sample life test, the assessment result is may not accurate enough. In this paper, we assume a certain prior distribution, according to prior information. Then, establish the posterior distribution combined with the accelerate life test data. Finally calculate the parameters of the accelerated model and life distribution. The simulation case verifies the effectiveness of the proposed approach. © 2015 IEEE. Source

Wang H.,Tsinghua University | Wang H.,Second Artillery Equipment Research Institute | Wang L.,Tsinghua University | Kang N.,Second Artillery Equipment Research Institute | Li R.,Second Artillery Equipment Research Institute
Key Engineering Materials

The base of Parallel loading device withstand the pressure of hundreds of tons, Limited by the conditions of use, All components of the device must be manual handling, so Its weight becomes very sensitive. The initial design weight of base are about 170 kg, By handling environmental constraints, four men lift is also very convenient, Therefore it's urgent to reduce weight. In this paper, a powerful modeling capabilities of UG combined ANSYS topology optimization module on the base for a topology optimization, We refer to the shape of topology optimization design of the final design of the structure. Through finite element analysis, the structural stiffness and strength to meet the design requirements, And weight decreased from about 170 kg to 120 kg, reduced by nearly 30%. Source

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