Design Of A Domestically Produced Automatic Throttle Control System

The follow-up throttle is a key device in the aircraft control system,which is used to transmit the speed signal from the bus or manually controlled by the pilot to the aircraft engine to realize the control of the flight speed.This paper has carried out the development and research work on the follow-up throttle control system,planned the overall structure of the control system,realized the localized substitution of key electrical components,developed the control system software and conducted test experiments.This article first introduces the research background of the subject,summarizes the development history and current situation of the aircraft’s automatic control system and throttle,and expounds the main research content and research methods of the thesis.Then some basic theories related to the throttle control system are introduced,including: the basic principles,transmission methods,electrical standards and bus word specifications of the 429 bus;the structure and control principle of the DC brushless motor,the mathematical model of the motor,Clark transformation and Park transformation,establishment of motor simulation model in d-q coordinate system,and space vector algorithm of DC brushless motor,etc.Subsequently,the hardware design of the automatic throttle control system is introduced,including: the analysis of the throttle control system scheme;the circuit design of the hardware system;the localized alternative design of key components;the design of each functional module system such as: power supply module,communication module,current acquisition module,Motor control and drive modules,as well as the design of clock circuits,reset circuits,download circuits,etc.After that,the software development of the control system is introduced,which mainly includes two parts: the 429 communication system software and the brushless DC motor control system software.In order to improve the anti-interference and stability of the system,the Kalman filter algorithm is introduced,and the Kalman filter equation is simplified according to the actual application,and the basic parameters are optimized.Finally,the overall integration and debugging process of the control system is introduced,and the whole system is tested experimentally based on the technical indicators of the project,which verifies the applicability and reliability of the system.