To achieve direct correlation between capability assessment and operational results, the paper puts forward and establishes mission space model of early-warning system of terminal anti-missile by applying the principle of periphery theory. The problem that direct correlation between mission space and operational results can't be established is solved by resolving the factors of covering degree, monitoring degree and protection degree of mission space and constructing comprehensive evaluation index. In order to verify the realizability of this method, the paper conceives that an important area has been attacked by a large scale missile and the terminal anti-missile operation is actively organized as the background. Then the application of operation capability analysis of early-warning system of terminal anti-missile operation mission space based on periphery theory is explored in the paper.

Sun tracking technology is the key to maximize power generation efficiency of the solar array of large spacecraft, such as space station. During the sun tracking process, any disturbance on the α direction of the solar array may diminish the tracking precision and power generation, even lead to severe vibration of cabin. Therefore, in order to reduce disturbance and improve sun tracking precision, a possible solution by using BP neural network PID controller associated with suppression of gear gap impact interference and friction interference is proposed firstly and studied systematically in this paper. The MATLAB simulation results of the designed BP neural network PID controller with gear gap interference and friction interference models show that the dynamic performance and follow up effect are better, and PID parameters can be adaptively adjusted, all satisfies the design requirements.

Informatization and Unmanned war is the development trend of the future battlefield, and the complex and variable characteristics of the battlefield environment make satellite positioning signals such as GPS positioning or Beidou positioning unable to pass to the local environment of the battlefield. Ultra-wideband (UWB) positioning technology has the advantages of strong anti-noise ability, high multipath resolution and penetration. This paper proposes the application of ultra-wideband (UWB) positioning technology to the local environment of the battlefield. According to the characteristics of the local environment of the battlefield, a localized positioning system based on signal arrival time location (TOA) is proposed to solve the problem of local environment of the battlefield without GPS or satellite positioning signal. It is proposed to use the full centroid algorithm to solve the unique coordinates of the target node, and use the method of quadratic calculation to improve the positioning accuracy. The numerical simulation experiment is carried out by using Matlab software. When the UWB ranging error is 0 and the variance is 400 mm2, the positioning error of the positioning system in x direction is within 0.03 m and the positioning error in y direction is within 0.06 m, and the positioning error in z direction is within 0.09 m, which verifies the feasibility of the positioning method.

When ground-to-air missile is launched vertically, the missile needs initial azimuth setting via Launch Control Unit for initial alignment, as the initial attitude error is one of the key factors that affect the handover of missile midcourse/terminal guidance. This paper analyzes the error link of initial azimuth via Launch Control Unit and the causes of big azimuth error currently. For this problem, it is considered to transform the composite roll error to the composite yaw error to get high accuracy initial azimuth, accordingly a method making use of twice self-alignment in missile erection to get high accuracy initial attitude for vertical launching is designed. Finally, the hardware-in-the-loop simulation is verified and the result shows that the algorithm can effectively reduce the initial attitude error from current 1.5° to less than 0.3° in the premise of no effect on the preparation procedure of missile launch.

In this paper, two kinds of guidance laws of tracking the missile height are proposed in order to meet the demand of controlling the flying height of cruise missiles. The first one assumes that the height control loop to be a 2nd order zero-static-error system, and controls the height by adjusting the stability of the system. The second one controls the flying height by introducing velocity compensation, deriving the nonlinear relationships between the excepted height and the excepted missile overload. The missile dynamic equations are built, and the numerical simulation are given to show the characters of each law using typical height orders. Furthermore, the value of the designed guidance laws in engineering application is well proved.

In this paper, an efficient method for extracting full pulse parameters is proposed. It is based on Digital Channelization technology to separate the signals in frequency domain. It can extract fine parameters such as intrapulse modulation, frequency modulation bandwidth, frequency modulation slope, initial frequency and so on. At the same time, cross channel data fusion technology can be used for integrity detection and analysis of signals across multiple channels. The signal pulse feature extraction is verified by digital simulation. It can ensure the detection precision of the pulse characteristic parameters, and the process structure is simple. It is easy to be realized in large scale programmable devices and is beneficial to the project implementation in the later period.

Facing the increasingly complicated war environment, the anti-interference performance of the infrared seeker needs to be continually improved. To meet this challenge, the research on the anti-interference performance of infrared weapon can provide technical support of the weapon system, which makes the great construction. This paper presents a method to evaluate the anti-interference performance based on random forest method. Through the idea of machine learning, the comprehensive anti-interference performance value of the guidance system is calculated, which provides a new idea for the evaluation of anti-interference performance of infrared imaging seeker. The experimental results show that the algorithm is reliable and accurate, and it can effectively evaluate the anti-interference performance of infrared seeker.

In present war conditions, the key facilities as long-range high power radar are focused for precise strike. The Reasons why the long-range high power radar is vulnerable are analyzed in modern warfare. Concealed detection based on distributed techniques is proposed in this paper. in which the transmitter and receiver are separated, and the radar systems are composed of mobile and fixed stations. System principle and key technologies are presented, and the system advantages including concealing, detection capability, setback performance, antistealth capability are analyzed. The research result can provide reference for the next generation long-range high power radar.

Based on the multi-body dynamics and virtual prototype modeling method, a rigid-flexible coupling dynamic model is established. The model contains chassis suspension, tire and supporting legs. The dynamic characteristics of the hoisting process under different working conditions are simulated and analyzed. The stability of the vehicle together with the stress of supporting legs and suspension in the whole hoisting process are analyzed. The research results provide a reference for the hoisting stability and stress of supporting legs of similar vehicles.

The basic characteristic of the fourth-generation fighter is possessing over stall maneuver ability, thus it‘s extremely urgent to figure out how to intercept this kind of fighters. This article discusses the over stall maneuver and its process, and sets the most classic ‘Herbst maneuver’ as main maneuver model to antidesign and establish mathematical model, in order to analyze the target intercept strategy against over stall maneuver target. Finally the article establishes a simulation platform similar to 9M96e2 missile, and conducts intercept trajectory simulation to testify the feasibility of the strategy.

This paper elaborates the development, test progress and deployment of Aegis antimissile SM-3 in recent years, analyzes the development history of Block IA, Block IB and Block IIA, and compares the evolution and performance of these interceptors. The paper emphasizes the latest development of flight/interception tests and summarizes the current deployment and equipment plan.

For the military operations of air strike on Syria by the US, Britain and France in 2018, this paper studies the characteristics of involved cruise missiles, the features of this air strike, and the highlights of participated air defense equipment of Syria and Russia. Through analysis of open information, the paper summarizes the operational experience of this air strike and obtains several inspirations for development of air defense equipment against cruise missiles, which can provide the support for development of future air defense equipment.