| The anticollision system for aircraft in-and-out garage is researched to avoid collisions with obstacles friction when aircraft is towed into a garage as a reason for repair and maintenance.In the dissertation,the system derived from cars' anti-collision reversing radar which is common.But it uses ultrasonic distance measurement as the main method,and improve various parts of the circuit to make it more accurate,uses dual-controller,adds GSM which is wireless to communicate with PC in the control room.By this way,the aircraft's movements are more intelligent.The system not only can apply to aircraft in-and-out garage,but also can be used in automotive anti-collision warning and avoidance reef ships and so on.In this dissertation,the system consists of four modules:the distance measurement module,display and alarm module,dual-controller modules and GSM wireless communication module.During the study,taking computer controlling technology,wireless communication technology and automation technology,using theoretical analysis,circuit design and research tools,computer simulation,hardware design and software design are completed,fuzzy control algorithm are applied in and simulated by MATLAB.First of all,research analysis at home and abroad are collected and studied.On the basis of application background,the system framework is designed;every module's design method and function are described.Secondly,four main modules in the system are designed in detail.In the distance measurement,plus-ultrasonic transmitting and receiving circuit are designed.The second module is completed by the application of liquid crystal display and buzzer alarming.In wireless communication module,Siemens TC35 is used and the communication interface circuit is finished.In the last module,MCU of P89V51RD2 is used for dual-controller,data storage room E~2PROM is extended by analog I~2C.Then,as the different of software client,software programs are designed for MCU A-side and MCU B-side respectively.In MCU A-side,software design includes distance measurement;display and alarm programs.In MCU B-side,software design includes serial communication program and the program which control sending and receiving message.In addition,the procedures that control reading from and writing into the E~2PROM are designed.Finally,the effectiveness of the system's location is improved by using fuzzy control algorithm.After completing the fuzzy controller of the system design,it is carried out the verification by using of Matlab/Simulink simulation. |
