Papers by Keyword: Missile

Abstract: In order to load a missile with T-drawbar into the rack fixed in a fighter plane automatically and quickly, the relative position between the rack and the T-drawbar must be measured. The principle of the relative position measuring method is introduced, the parameters calculating equations are derived, and the precisions are analyzed. The measuring system is composed of lens, planar array CCDs, lasers, and cooperative objects. By analyses, the system can measure the relative position information including X, Y and Z between the drawbar and the rack. The precisions of length are 7.8mm in X, and 1.2mm in Y and Z.

Abstract: Abstract: In order to improve the penetration efficiency of missile, an effective suggestion is fixing jammer in missile. The jamming can decrease the radar detection range of air-defense missile weapon system, so the intercept frequency is lessened. In this paper, it builds the intercept model of ship-to-air missile with radar detection range. Thus, the penetration probability of missile is presented. Finally, the simulation illustrates that the jamming is effective, and the results can provide suggestion on the jammer parameter design.

Abstract: From the urgent needs of storage life evaluation in missile storage management, combining the characteristics of long-term use of missile and characteristics of different level products of the system, a complete set of overall solution of the life prediction and life extension of missile was proposed. First, through the use of missiles long-term use historical information, the reliability function model of the missile storage was established, and the life conclusions of missiles were estimated. Secondly, by conducting accelerated life or accelerated degradation test of missile, the life of missile was estimated. And by conducting environmental test and simulation test, the environmental adaptability indexes were verified. Thirdly, by carrying out the life feature detection analysis of the circuit board, the microscopic defects in the circuit board were detected, and the guidance for life extension work was raised. Finally, by conducting accelerated degradation of the key components and materials, the life conclusions of them were estimated. Combining the storage life information of missiles, board-level circuits, components and materials, a complete set of overall solution of the life prediction and life extension of missile was proposed.

Abstract: Experimental details of the flow field and wake over airfoils and 2-D wings are time and cost consumption. In this study, the flow visualization technique was adopted to investigate the flow field surrounding NACA4412 airfoil. The investigations were carried out in smoke tunnel, operating at low Reynolds number in a range of 10⁵. The airfoil was tested in two operational cases: first as clean wing and the second as under-loaded wing by attached missile model. The experiments were conducted at various angles of attack as 0⁰, 5⁰,10⁰, 15⁰ and 20⁰. It was found that the under-load of external body under the wing is influencing the flow structure over the wing. Also, the wake after the external body is swirling, leading to very complicated wake interaction. The results from the work can support the numerical simulation and the prediction of the laminar to turbulent transition and the separation and wake interaction of high lift airfoil flow fields.

Abstract: Effective control of an elastic space vehicle is possible only on the basis of exact information on its elastic oscillations. Exact estimation of these oscillations is possible via a distributed system of measuring instruments installed in different points of the elastic design. In recent years, new types of inertial measuring devices came into use like micro-electro-mechanical (MEMS) gyroscopes and accelerometers. Significant progress in the development of on-board computers allows the use of modern means of filtering algorithms, based on numerical integration of a large number of differential equations in real time. Miniaturization of sensors and the decrease of their power consumption increases admissible quantity of used sensitive elements and reduces restrictions for their placement. This article presents new results on optimization of placement of system of sensors on an elastic controlled object.

Abstract: Currently, missile and artillery air defense system under the conditions of the network has become a very important air defense weapon system, and play an unprecedented role in modern warfare process. To develop high damage performance missile and artillery air defense system has become common goal. It is necessary to study the impact of missile and artillery air defense system damage performance for improving damage probability of missile and artillery air defense system.

Abstract: A class of height double PID controller based on posture stability is designed in this paper aim at simplified dynamics model of missile pitch channel linearization and simplified model of missile height kinematics link. The implement process of using matlab software simulink toolbox is introduced in detail. Secondly, The transfer function calculating algorithm which solves nonlinear link in simulink using matlab language linmod function is proposed in this paper aim at nonlinear of height kinematics link. Finally, the bode diagram of whole system is obtained and the stability margin of system is analyzed by computer simulation.

Abstract: For posture angle tracking problem of missile pitch channel linear model, PID controller is designed. Programming implementation issues is studied based on simulink. The open-loop transfer function calculation method which contains PID controller is put forward by using matlab. The bode diagram of system is worked out. The judgment method of analysing system stability is put forward based on simulink.

Abstract: In order to meet the requirements of target tracking problem in terminal guidance of intercepting an aircraft, based on Gaussian-Newton Iteration strategy, a novel divided differential filter was introduced, which guaranteed higher estimation accuracy than the commonly used EKF and UKF methods. The relative small computation load made it possible for real time implantation of the filter and simulations based on a typical terminal guidance model proved the correctness and effectiveness of the proposed filter.

Abstract: Currently, missile and artillery air defense system under the conditions of the network has become a very important air defense weapon system, and play an unprecedented role in modern warfare process. To develop high damage performance missile and artillery air defense system has become common goal. It is necessary to study the impact of missile and artillery air defense system damage performance for improving damage probability of missile and artillery air defense system.