Control Of The Ramjet Engine Fuel Supply System

Flying largely from technological breakthroughs to promote technology innovation. Thetraditional air-breathing propulsion technology have limits on the working principle, it isdifficult to adapt to the speed of sound conditions for hypersonic propulsion performancerequirements of the first; and adopt the principle of supersonic combustion characteristics forthe new ramjet (scramjet) inspiratory part of the solution Hypersonic propulsion technology inan important way. Scramjet technology involves a number of key technology, supersoniccombustion, heat of hydrocarbon fuels, thermal protection, control technology, engine/airframe integration, aircraft, pneumatic technology, the integration of a number of high-tech,with a strong forward, Strategic and driving, and is the future of scientific and technologicaldevelopment of another new impetus and high ground.Fuel supply and control technology which is the scramjet one of many key technologies,fuel supply system is the engine control system is one important component. The burningobject is a typical system with multiple variables, the process of methane combustion controlsimulation model of the mathematical theory is more difficult. At present, widely used inconventional PID control scheme to control the effect is not ideal, this will be the basis ofconventional PID control, fuzzy control theory, adaptive control theory to control the fuelsupply system.Fuel supply system is a complex system with typical multi variables，non-linear，timedelay characteristics. The paper detailed how to build an automated fuel supply systems anddesign the module sensors for various parameters. The main control board for fuel supplysystem is based on ARM7core. In the software control algorithms， the theory ofconventional PID and fuzzy control is used.Within a certain scope of this paper and to some extent on the fuel supply controlsystem for automatic control circuit system hardware platform and structures， select theRS485bus and4~20mA current loop-based Kong Zhiqi and means of communicationbetween the various modules. Fuzzy control and PID control of fusion have been studiedand the control algorithm to achieve a simple verification.