A Model Rocket Launch Vehicle Leveling System, Automatic Physical Research

Along with the development of modern science and technology, the most rocket launch trucks in the world have applied advanced automatic aiming and leveling technology. Up to now, in Sichuan Academy of Aerospace Technology (SCAAT), our different types of rocket launch truck do not apply the automatic physical leveling technology but only the electric physical leveling technology and also not engage in its research work. Whereas, there are some disadvantages such as long operation time, unconvenient operation and low leveling accuracy in applying electric physical leveling system on rocket launch truck that are very difficult to meet the battle requirement of modern war. The automatic physical leveling and semi-rigid support state of rocket launch truck can reduce the operation reaction time, reduce the initial disturbance in rocket launching, increase the stability of rocket launching and reduce the quantity of operators and automatization level of operation and the initial aiming accuracy so as to improve the rapid reaction ability, accurate striking ability and viability of weapon system, so it is very necessary to make research on automatic physical leveling system for our rocket launch truck.On the basis of analyzing overall technical requirements and related literature, this article makes an innovative and groping research on the automatic physical leveling system, and simulative analyzing by using advanced control software, getting the following research content and conclusion:a. To research the collocation mode, structure form and supporting mode of the leveling system, types of level tester, types of main hydraulic control valve and main controller, the control arithmetic, and has obtained the overall technical scheme and structure configuration of automatic physical leveling system;b. To research the leveling method, leveling process and the judge principle of highest leg, to derivate the horizontal gradient and obliquity in vertical and horizontal, the leveling error and control accuracy of obliquity in vertical and horizontal, the horizontal obliquity, and the mathematic model of displacement of leg and tyre at height direction, and has obtained the control strategy of automatic physical leveling and the semi-rigid supporting strategy;c. To research the working principle of hydraulic system and select the types of main hydraulic elements;d. To research the working principle and software/hardware structure of automatic control system, the automatic control arithmetic, automatic control process, and select the types of main electric control elements;e. To establish the mathematic model of automatic leveling control system, establish the visual fuzzy ratiocination system and simulation control model; To make simulative analyzing and research by using Matlab/Simulink and fuzzy logic tool box; With fuzzy PID control arithmetic, this automatic leveling system get good robustness and short adjustment time without over-adjustment and can meet the overall technical requirements.