Design for Simulation System of the Aviation Autopilot

Abstract

A simulation system of the aviation autopilot for teaching and training is established. By analyzing the function, structure and principle of the aviation autopilot, the aviation autopilot simulation system is established to realize the real-time control of flight environment. The simulation system mainly refers to the real-time control of the steady status and manipulation status in the inclined channel, course channel and pitch channel. The system has the following characteristics: convenient operation, stable work, convenient observation. Introduction The purpose of the aviation autopilot: stabilize the plane pitching angle, inclined angle and course angle; keep the given pressure level of the aircraft; control the rise, decline and turn of the aircraft; change a flat to make it fly into the flat in any state; automatic control elevator adjustment and constantly lift elevator surface under load[1] [2]. The aviation autopilot the following characteristics: the aircraft will have not any adjustment; autopilot is on by turning on the button in any state [3]. Working Principle Autopilot consists of three relatively independent channels, namely: the inclined channel, course channel and pitch channel [4]. The inclined channel controls aileron; the course channel controls elevator; the pitch channel controls rudder. Working principle of each channel is shown in figure 1. The manipulation components are not directly effect on the channel. Sensitive element: measure the aircraft state and motion parameters (angle, angular velocity, height, etc.) and convert them into the electrical signals which are proportional to the parameters. Manipulation components: electrical signals controlling the aircraft are generated by the artificial manipulation. Server: The rudder surface is deflect to a angle by the server (a power plant). The rudder angle is proportional to electrical signals controlled by the sensitive components and manipulation components. Fig. 1 Working principle of the aviation autopilot 5th International Conference on Education, Management, Information and Medicine (EMIM 2015) © 2015. The authors Published by Atlantis Press 837 Design for simulation system of the aviation autopilot The inclined channel. Working principle of the inclined channel is shown in figure 2. Angular transducer: measure slant angle γ of the aircraft which is translated into the proportional electrical signal [5]. Directional gyroscope: measure heading error Angle ΔΦ of the aircraft which is translated into the proportional electrical signal. Angular velocity transducer: measure slant angular velocity of the aircraft which is translated into the proportional electrical signal. The steady status. The control equations of steady status δ=k   +kγ+kΦΔΦ In the formula: k  -The slant angular transmission ratio kγThe slant angular velocity transmission ratio kΦThe heading angle Φ transmission ratio