ARINC429 Data Bus(中国民航大学).

1、2021-7-111 ARINC429 Data Bus 孙海涛：孙海涛：111143518 李征兵：李征兵：111143511 王福君：王福君：111143520 2021-7-112 Introduction nWhats the ARINC？ Full name: aeronautical radio incorporated company ARINC：organization ， schedule airlines ，transport companies, airplane manufacturers, foreign airlines. Activity: produce spe

2、cifications,report. Purpose: indicate to manufactures group opinion; lead new equipment designs. ARINC specifications in our life: ARINC453-high speed digital transfer system. ARINC573-digital flight data reconding system. ARINC561-inertial navagation system. ARINC708-airborne weather radar. 2021-7-

3、113 Whats the ARINC 429 Data Bus ? n Aeronautical radio INC. nEquipment specification . ndigital data transmission specification . 2021-7-114 History nIn July 1977. ncommunicate with each other. 2021-7-115 History n B-757, B-767 ,B-737 2021-7-116 ARINC-429 Structure ARINC 429-mark 33 digital informa

4、tion transfer system. Standard:transfer data between avionic element. Method:transmit information form output to all system. Structure Composition a transmitter some receivers a single shielded twisted wire pair. 2021-7-117 ARINC-429 Structure nPicture of structure 2021-7-118 Electrical Characterist

5、ic Transmitted over bus by combining binary data with bit and word timing. Modulation method:bipolar return to zero State modulation: HI state LO state NULL state Transmission format: self clocking ,self synchronization system. 2021-7-119 Electrical Characteristic Data word:a 32 bit word in bipolar

6、form Containing:logic 1,logic 0 and NULL period. specified thresshold:transmitter output or receiver input ports meet the pulse voltage. Voltage presented:depend on line length,line stubs,nodes and the number of receiver connected to transmitter. Normal voltage ranges HI:+6.5V to +13V NULL:+2.5V to

7、-2.5V LO:-6.5V to -13V 2021-7-1110 ARINC Label Each data consist of 32 bits. octal label.（0-377） (1,2、3,4,5、6,7,8) an octal label of 230 True airspeed 2021-7-1111 Source/Destination Identifier (SDI) To identify the source of a word. When a word needs to install,the destination of the word is identified by the SDI. Bits 9 an