Safety test has an important impact on the suspension management system, this paper starts from the top-level requirements of the product under test, according to the functional performance characteristics of the suspension management system, to identify possible factors affecting safety, design-related tests to verify, so as to improve product safety. Based on the definition of weapon security of suspension management system, based on the existing demand analysis model and theoretical methods to extract the top requirements of suspension management system and product safety design requirements, combined with the actual project testing experience, build a suspension management system weapon security demand analysis method, Combined with specific test project analysis of the actual use scenario of the product under test, testers can use this analysis template to quickly identify the key safety-related events in the product under test, form specific test requirements and design test cases.
In order to solve the inconvenience caused by the difference of hardware and software test resources during product testing, realize instrument interchange, meet the rapid change characteristics of test demand and rapid deployment requirements, this paper studies the construction method of a distributed test environment, adopts a fixed general test platform in hardware, and drives Heterogeneous hardware interface standardization technology (middleware technology), isolation module differences, to solve the different manufacturers to the module replacement to bring compatibility problems. Software adopts the design principle of layered software, connecting test elements such as device libraries, ICD libraries, use case libraries, etc. through the use case design layer, resource allocation layer, and hardware environment layer, and through XML between elements Exchange data information, interact with database information via Ethernet, and complete the automatic testing process. Each software runs independently on multiple test devices in the test environment, enabling the automatic execution of corresponding actions or automatically generating the test case software code through XML file.
KEYWORDS: Target detection, Single photon, Ranging, Defense and security, Signal detection, Signal to noise ratio, Quantum physics, Quantum information, Laser applications, Defense technologies
In modern war, high-speed moving targets such as fighter planes are the key point to reverse the situation of war. Such targets not only move fast, but also stealth performance is getting better and better. By studying the characteristics of high speed moving stealth target, the key technologies of laser defense against high speed moving stealth target are analyzed from the aspects of quantum imaging and quantum detection, and the problems that need to be studied in each technology are pointed out.
This paper presents a portable infrared/visible composite target simulator design configuration. The system adopts reflective optical design, through the combination of blackbody and visible light source system design and a variety of target plate, it can provide 0.4μm~12μm band simulation target, with parallel difference better than 10″ and 200mm optical aperture. It provides a variety of quasi-direct simulation targets for infrared and visible performance and dynamic tracking test of photoelectric detection equipment.
This paper presents a wave front distortion compensation technique applied to single photon ranging system. The key technologies in the design and the expected results are analyzed, which provides the design basis for the remote detection of the single photon ranging system.
The visible light dynamic scene projector is a key component of the visible light imaging hardware-in-the-loop(HWIL) simulation test system.With the Digital Micro-mirror Device (DMD) as the key component, a dynamic visible light imaging simulation system was developed which will be used as the hardware in loop simulation platform for a certain type of airborne visible light imaging system.DMD fundamental operating principle and imaging theory are explained thoroughly. According to required,high-brightness RGB LED, aspheric condenser,light rod,relay lens,TIR lens were used to homogenize the illumination light. The optical projection system was specially designed to solve the large diameter and distance of exit pupil.The paper employed mature solution of DMD driving(TI) to achieve scene input,modulation and reproduce. The dynamic scene projector had been successfully applied to the HWIL simulation system of an airborne visible light imaging system, and had high real-time and fidelity, and met the requirements for use
The infrared dynamic scene projector is a key component of the infrared imaging seeker semi-physical simulation system. Aiming at the long-wave infrared imaging seeker system, the design idea of long-wave infrared dynamic scene projector with IR-CRT as the core device was proposed. The working principle of IR-CRT was introduced. The optical collimation system was designed. The key parameters such as resolution, distortion, simulated temperature range and uniformity were tested. The dynamic scene projector had been successfully applied to infrared imaging seeker. The semi-physical simulation system had verified the static and dynamic tracking performance of the infrared imaging seeker, which met the requirements of product use, and promoted the product development process.
In this paper, a testing system is introduced to monitor the beam quality of a laser beam propagating over a long distance. The system consists of a large aperture optical system, a high sensitivity receiving system, a fast signal processing circuit and so on. The laser beam quality propagating 10km can be tested, and the two-dimensional energy distribution, pre-mirror energy density, centroid coordinate and other parameters can be obtained.
The common methods for measuring the consistency of optical axis of multispectral and multi optical axis optoelectronic system are introduced in detail in this paper. The advantages and disadvantages of various methods are analyzed in detail. For the latest test requirements for the multi optical axis consistency of the current photoelectric system, a set of new test schemes for measuring the consistency of the laser emission axis and the sight axis, ant the laser receiving axis and the sight axis are designed. The device can also test the detection sensitivity and resolution of photoelectric system. The shortcoming of the old scheme, that can not be tested for laser receiving optical axis consistency , is soved. The design results show that the whole testing system meets the development trend of automation and lightweight, possessing extensive application prospect of optical axis consistency testing system.
Target Simulator could simulate Infinity Distance Dynamic Target with Optical Characteristics. It provides simulative target for IRST to test its technical indexes of target detecting on the ground. A scheme of Off-axis RC Target Simulator, which has high resolution and Compact Characteristics. This scheme not only could simulate full wave optical Characteristic target of high resolution, but also Use full aperture Light of Compact optical system. The results show that the focal Length is 800mm, the aperture is 130mm, the length is 290mm,the width is 190mm, the height is 190mm, the modulation transfer function of full wave near diffraction-limited , the distortion is less than 2%,and the weight is less than 10kg.
In the field of airborne photoelectric detection, medium wave imaging lenses with large field of view are mainly used for assistant navigation. A new type of optical system of wide field of view is introduced in this paper. It has compact structure, and could match cooling medium wave IR detector with different F numbers. It is proved that the system could realize the large field of view, image illumination uniformity, low distortion, the same resolution in the whole field of view. The structure of the imaging system introduced in this paper provides a reference for the design of medium wave detection system of large field of view of Variable F number.
Laser echo has an important application in target detection and identification, beam quality analysis and so on. In the paper, a receiver for detecting laser echo signal is designed. Combined with the far field target plate, the facula performance test of photoelectric products can be carried out at the outfield experimental station. The laser echo receiving device mainly includes optical system, photoelectric conversion module, signal processing system, data processing and display control system and so on. The optical focal length of receiver is 1299.99mm, caliber 160mm, and image resolution is 320*256. Finally, the correctness of the laser echo receiver is verified by simulation experiments.
In this paper, a performance test system is designed, which is used to produce the difference in temperature between the target and the background, and simulate the infinite infrared targets. The medium-wave imaging system detects infrared target and generates target image. The evaluation of the performance of the medium-wave imaging system is completed by using the standard test method and data processing and analysis of images in the laboratory. The test system, which has the field of view of 30°×30°, the focal length of 34mm, and the distortion is less than 3%, could meet the need of testing the temperature sensitivity, resolution and transfer function of the medium-wave imaging system which the field of view is more than 90°.
Compared with microwave radar, Laser radar has high resolution, strong anti-interference ability and good hiding ability, so it becomes the focus of laser technology engineering application. A large scale Laser radar cross section (LRCS) measurement system is designed and experimentally tested. First, the boundary conditions are measured and the long range laser echo power is estimated according to the actual requirements. The estimation results show that the echo power is greater than the detector's response power. Secondly, a large scale LRCS measurement system is designed according to the demonstration and estimation. The system mainly consists of laser shaping, beam emitting device, laser echo receiving device and integrated control device. Finally, according to the designed lidar cross section measurement system, the scattering cross section of target is simulated and tested. The simulation results are basically the same as the test results, and the correctness of the system is proved.
KEYWORDS: Servomechanisms, Control systems, Infrared search and track, Optical scanning systems, Mirrors, Modulators, Process control, Control systems design, Telecommunications, Automatic tracking
Servo system is an important part of an Infrared Search and Track (IRST) system in a fighter plane, which includes scanning mechanisms, racemic mechanism, focusing mechanism, aperture adjuster, shaking-mirror modulator and system control software. This paper firstly describes the servo system of the IRST system, and then lays emphasis on design of control method. An intelligent controller is given and its parameters are defined. Finally the result is presented to demonstrate the effectiveness of this design.
Infrared Search and Track (IRST) system is one of the most typical airborne sensors for the remote target measurement, detection and tracking in the fighter planes. And the modeling of the measurement error is the basis of target recognition and tracking. For the purpose, this paper describes the important components of IRST system and their influence upon the measurement accuracy. After error propagation and conversion are considered, the total measurement error of IRST system can be obtained and compared with the calculations based on normal distribution model of the measurement error. Then a novel and more practical mathematical model of the measurement error is formed and the main parameters are defined. Finally data simulation is implemented, and the results demonstrate the new mathematical model of the measurement error is more effective.
In recent years the problem of multiple target tracking has bene studied more and more extensively. However, as the foremost difficulties which multiple target tracking (MTT) involves, the problems of gating and track initiation have been ignored to a certain extent. Now rectangular and ellipsoidal gating are used in most MTT systems. This paper describes rectangular and ellipsoidal gating were not very successful in many cases. Then the new track gate, quasi-drip-shaped (QDS) gate, is proposed to eliminate unlikely observation-to-track pairings more effectively and to operate a pre-correlation when more than one returns are within the track gate. The sensor errors and the influence of maneuver are considered synthetically. Based on the more accurate analysis of error data distribution, QDS gate is formed. Simulation results are presented for five approximately equals ten targets include several heavily interfering ones; these illustrated the improvements obtained by using QDS gate.
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