Design Of Missile Launch Vehicle Power & Vibration Testing And Missile Signal Simulating System

Missile weapons are playing an increasingly important role in modern wars. Therefore, the performance of missile launch vehicle, which is the ground mobile equipment of missile weapons, is particularly important. Missile launch & control system, which is in the launch vehicle, is the central control part of missile weapons. It's just like a brain, receiving and transmitting various control signals and instructions, controlling the status of the missile real-timely. In order to guarantee that the missile weapon is in good state and can work well, we must first ensure the reliability of the missile launch vehicle and the launch & control system.This article begins with a brief analysis on the research status of missile test equipment. According to the development trend and the major problems of military automatic test system at present, based on the considerations of the reliability of launch vehicle and launch & control system, this paper suggests a conception of a platform based on virtual instrument technology for launch vehicle power and vibration test and missile signal simulation. On this basis, the research contains two large modules. One is missile launch vehicle power and vibration testing module, and the other is missile signal simulation module. This paper does a specific analysis and elaboration on these two modules in testing principle, hardware circuits and software programming three aspects separately.These two modules use the same virtual instrument hardware foundation platform and software programming environment. The hardware platform consists of PXI-1042Q chassis, PXI-8106 embedded controller, PXI-6251 multifunction data acquisition card and keyboard, mouse, monitor and some other peripheral equipment. And the software programming environment is LabWindows/CVI, which is a special developing software for virtual instrument based on C language.Missile launch vehicle power and vibration testing module includes the following units: AC power supply testing unit, DC power supply testing unit, discrete amount testing unit and vibration testing unit. This paper highlights the measurement principle of each test project. On this basis, we designed their respective signal conditioning circuits in order to meet the requirement of input range of the data acquisition card. Afterwards, LabWindows/CVI is used to analyze and process the collected signals, and then give the final test results.So as to prepare for launch & control system testing, we designed a missile signal simulation module. Its role is to simulate all kinds of information signals that the missile submits to the launch and control system during work. This module include several units, such as missile-in-place signal simulation unit, cutoff-frequency simulation unit, cutoff-current testing signal simulation unit, unlock threshold simulation unit, anti-interference testing signal simulation unit, truncate function testing signal simulation unit and guidance voltage threshold simulation unit. A detailed description is made for the test principles of various test items and the indicators of missile signals that need to be simulated. Software played a major role in the implementation of all the functions in this module, as hardware only involves the PXI fundamental platform, without any additional circuitry. In this way, the advantages of virtual instrument can be fully brought into play. Simply using the software, we can easily change the performance indicators and parameters with no additional hardware cost. Thus, the portability is significantly improved and the development costs are greatly reduced.