CN104683322A - ACARS function activation method of Collins CMU-4000 avionics equipment - Google Patents

Abstract

The invention discloses a Collins CMU (control monitor unit)-4000 avionics device ACARS (Aircraft Communication Addressing And Reporting System) function activating method. An ACARS function of CMU-4000 equipment is activated through an MCDU (Multifunction Control Display Unit) simulator, i.e. at first, hardware connection between the CMU-4000 equipment and the MCDU simulator is realized through a 429 bus; an activating process comprises the steps of establishing a communication negotiation mechanism between the CMU-4000 equipment and the MCDU simulator, and receiving and transmitting uplink and downlink data. After activation, the CMU-4000 can display a received ACARS message from a ground workstation on the MCDU simulator and can also transmit a downlink ACARS message to the ground workstation through a VDR (Voyage Data Recorder), so that complete ACARS air-to-ground communication is realized.

Description

ACARS function activation method of Collins CMU-4000 avionics equipment

technical field

The present invention is to realize the ACARS function activation of Collins CMU-4000 aviation materials. The system simulates the complete ground-air intercommunication and ACARS message transmission of the aircraft through the MCDU simulator, CMU-4000 and VDR and the DSP equipment of the ground workstation. the

Background technique

Under the background that my country's aerospace industry has made great progress and is moving from a civil aviation country to a civil aviation power, the localization of aircraft is about to be realized, but there are still many deficiencies in the exploration and research of communication systems on aircraft. This patent focuses on the communication mechanism between the CMU-4000 and MCDU on the aircraft. By using the MCDU simulator to activate the ACARS function of the CMU-4000, the specific communication negotiation mechanism and interaction process between the CMU-4000 and the MCDU are explored. Its realization of localization lays the theoretical foundation. the

Contents of the invention

The ACARS function activation method of the Collins CMU-4000 avionics equipment is to activate the ACARS function of the CMU-4000 through the MCDU simulator. First, the hardware connection between the CMU-4000 and the MCDU simulator is realized through the 429 bus: there are two on the CMU-4000 For the control panel, first connect the power supply pins of CMU-4000: connect the No. 88 pins of P1 and P2 boards with 28VDC forward voltage, connect the No. The No. 85 pin is connected to the ground of the CMU-4000 shell, so as to ensure that the CMU-4000 can be activated; when using the 429 board for communication, it uses 1 channel for sending and 2 channels for receiving, and each channel has two ports AB, To transmit signals with a phase difference of 180 degrees, the AB ports must be connected. There are 4 ports in total. Connect the AB ports of channel 1 to pins 21 and 22 of P2 of the CMU, and connect the AB ports of channel 2 to pins 21 and 22 of P2 of the CMU. Connect the ports of the MCDU simulator, connect the two ports AB of the 2 channels in another 429 communication board with pins 35 and 36 of P2 of the CMU, and connect the two ports AB of the 1 channel with the MCDU simulator The ports are connected to realize the hardware connection between CMU-4000 and MCDU simulator. the

The activation process includes the establishment of communication negotiation mechanism between CMU-4000 and MCDU simulator, as well as the sending and receiving of uplink and downlink data. First, the MCDU simulator tells the CMU-4000 its device number through Label377 and reports the health status of its 7 ports and optional ports through the real-time status message (Label270), and after receiving the system label message sent by the MCDU simulator, the CMU-4000 , use the system address label message (Label172) to tell the MCDU simulator its SAL, thus starting to establish a data communication mechanism with the MCDU simulator; after receiving the system label message of the CMU-4000 and confirming its SAL, the MCDU simulator sends Inquiry message (ENQ), the ENQ message has two functions, in the process of initializing the menu, the 17-20 bit of the ENQ message is set as the title request; after confirming the content of the menu title, the MCDU simulator will send the inquiry message again, requesting to send Page content, the 17-20 bits of the inquiry message are set as the page content request; when switching from the current subsystem to the CMU-4000, the MCDU emulator sends an inquiry message to the CMU-4000, and the inquiry message contains the SAL, MAL and Page content request; when the CMU-4000 requests to send data to the MCDU simulator, it first sends the RTS word, and the normal request code and menu text code of the RTS word are used for the transmission of the message and the transmission of the menu title content respectively. The specific RTS The content of the word is related to the specific inquiry content sent by ENQ. When the MCDU simulator initializes and establishes the menu, CMU-4000 responds to the ENQ word sent by the MCDU simulator, and the RTS word is encoded as a menu text request; when the MCDU simulator confirms that the CMU- After the 4000 related interface, CMU-4000 responds to the ENQ word sent by the MCDU simulator, and the RTS word code is a normal request; after the MCDU simulator receives the RTS sent by the CMU-4000, the MCDU simulator sends a CTS word response within 200 milliseconds; CMU-4000 starts to transmit data after receiving the CTS response. The STX word is the start word of the record unit, which is the first word when CMU-4000 transmits information. The word is ETX word; MCDU simulator sends ACK word as a response, when the recording unit is at the end of the message, the last word of the recording unit is EOT word, MCDU simulator sends ACK word as a response, when CMU-4000 receives the ACK word , indicating that the data transmission is complete, and the ACARS function of the CMU-4000 is activated. After activation, the CMU-4000 can display the received ACARS message from the ground workstation on the MCDU simulator, and send the ACARS message to the ground through the VDR. The workstation sends downlink ACARS messages to realize complete ACARS ground-to-air communication. the

Description of drawings

Figure 1 specifically describes the complete process of establishing interaction between the CMU-4000 and the MCDU simulator. If the MCDU simulator receives 172 sent by the CMU-4000 for 3 consecutive seconds, it indicates that the subsystem is not faulty, otherwise the subsystem is faulty. After the connection is established, the MCDU simulator sends ENQ (menu text request) every 10s to 60s, and CMU-4000 responds accordingly to prove its activity. the

Figure 2 is the specific menu interface displayed on the MCDU simulator after the interaction between the CMU-4000 and the MCDU simulator is established in actual operation. According to the actual operation, the corresponding data in the specific data transmission process between the CMU-4000 and the MCDU simulator :

CMU-4000>>RTS1200019

CMU-4000>>CNTR01910190

CMU-4000>>DATAA04C4490::DL

CMU-4000>>DATA20202090:: 

CMU-4000>>CNTR01FD0190

CMU-4000>>DATAC5523C90::<RE

CMU-4000>>DATAD2555490::TUR

CMU-4000>>DATA80004E90::N

CMU-4000>>CNTR017D0990

CMU-4000>>DATA3A323090::02: 

CMU-4000>>DATA00383090::08

CMU-4000>>CNTR817C0990

CMU-4000>>DATAA04F4E90::NO

CMU-4000>>DATACD4F4390::COM

CMU-4000>>DATA80004D90::M

CMU-4000>>CNTR819D1290

CMU-4000>>DATACE4F4390::CON

CMU-4000>>DATAC7494690::FIG

CMU-4000>>DATA00002A90::*

CMU-4000>>CNTR01910790

CMU-4000>>DATAC34F4190::AOC

CMU-4000>>DATAC54D2090::ME

CMU-4000>>DATA80554E90::NU

CMU-4000>>CNTR81F30190

CMU-4000>>DATA52503C90::<PR

CMU-4000>>DATA4C464590::EFL

CMU-4000>>DATA48474990::IGH

CMU-4000>>DATA00005490::T

CMU-4000>>CNTR81F50190

CMU-4000>>DATA4E453C90::<EN

CMU-4000>>DATAD54F5290::ROU

CMU-4000>>DATA80455490::TE

CMU-4000>>CNTR01F70190

CMU-4000>>DATA4F503C90::<P0

CMU-4000>>DATAC6545390::STF

CMU-4000>>DATAC7494C90::LIG

CMU-4000>>DATA00544890::HT

CMU-4000>>CNTR01F31190

CMU-4000>>DATA544C4690::FLT

CMU-4000>>DATA4F4C2090::LO

CMU-4000>>DATA003E4790::G>

CMU-4000>>CNTR81F71190

CMU-4000>>DATAD0455290::REP

CMU-4000>>DATA54524F90::ORT

CMU-4000>>DATA003E5390::S>

CMU-4000>>CNTR81F91090

CMU-4000>>DATA51455290::REQ

CMU-4000>>DATA53455590::UES

CMU-4000>>DATABE535490::TS>

CMU-4000>>CNTR81FB0F90

CMU-4000>>DATA53494D90::MIS

CMU-4000>>DATACD204390::CM

CMU-4000>>DATA554E4590::ENU

CMU-4000>>DATA00003E90::>

CMU-4000>>EOT84010090

MCDU Simulator>>ACK860100C4

CMU-4000>>RTS12000190

MCDU Simulator>>CTS137F00C4

CMU-4000>>STX82012290

CMU-4000>>CNTR01F51190

CMU-4000>>DATA53544190::ATS

CMU-4000>>DATA4F4C2090::LO

CMU-4000>>DATA003E4790::G>

CMU-4000>>CNTR81F90190

CMU-4000>>DATACC433C90::<CL

CMU-4000>>DATACB434F90::0CK

CMU-4000>>DATAC5532090::SE

CMU-4000>>DATA00005490::T

CMU-4000>>CNTR01FB0190

CMU-4000>>DATAC5543C90::<TE

CMU-4000>>DATAA0484390::CH

CMU-4000>>DATA4E454D90::MEN

CMU-4000>>DATA80005590::U

CMU-4000>>CNTR01910190

CMU-4000>>DATAA04C4490::DL

CMU-4000>>DATA20202090:: 

CMU-4000>>CNTR01FD0190

CMU-4000>>DATAC5523C90::<RE

CMU-4000>>DATAD2555490::TUR

CMU-4000>>DATA80004E90::N

CMU-4000>>CNTR017D0990

CMU-4000>>DATA3A323090::02: 

CMU-4000>>DATA00383090::08

CMU-4000>>CNTR817C0990

CMU-4000>>DATAA04F4E90::NO

CMU-4000>>DATACD4F4390::COM

CMU-4000>>DATA80004D90::M

CMU-4000>>CNTR819D1290

CMU-4000>>DATACE4F4390::CON

CMU-4000>>DATAC7494690::FIG

CMU-4000>>DATA00002A90::*

CMU-4000>>EOT84010090

MCDU Simulator>>ACK860100C4

Figure 3 shows that after CMU-4000 establishes contact with the DSP on the ground, CMU-4000 enters the POACOMM stage. The pilot enters the required menu commands on the MCDU simulator interface and transmits them to CMU-4000 through the 429 communication bus. CMU-4000 communicates with the ground through the VDR. When the DSP base station establishes a connection and transmits the command to the ground workstation, the MCDU simulator interface displays the content. the

Specific implementation method

1. CMU-4000 and MCDU simulator establish two-way communication data hardware connection through 429 bus

CMU-4000 tail pin connection status: CMU-4000 has two control panels, first connect the power supply pins of CMU-4000, connect the 88 pins of P1 and P2 boards with 28VDC forward voltage, connect the Pin No. 87 is connected to the ground of 28VDC, and pin No. 85 of the P2 board is connected to the ground of the CMU-4000 shell, so as to ensure that the CMU-4000 can be activated. The two-way communication between the MCDU simulator simulation system and CMU-4000 is completed through the 429 communication board. We use 1 channel for sending and 2 channels for receiving. Each channel has two ports AB and transmits signals with a phase difference of 180 degrees. A and B ports must be connected, a total of 4 ports. Connect the two ports AB of channel 1 with pins 21 and 22 of P2 of CMU-4000, and connect the two ports AB of channel 2 with the ports of the MCDU simulator simulation system. Connect the two ports AB of channel 2 in another 429 communication board with pins 35 and 36 of P2 of CMU-4000, and connect the two ports AB of channel 1 with the ports of the MCDU simulator simulation system , and then establish a communication negotiation mechanism. the

In this patent, the 429 communication board is used to realize the two-way communication between the CMU-4000 and the MCDU simulator, which can not only ensure the timeliness and rapidity of the communication, but also ensure the accuracy of the communication. the

2. CMU-4000 and MCDU simulator establish a communication negotiation mechanism and conduct protocol negotiation. The specific interaction process and interface specifications are as follows: 

(1) The MCDU simulator tells the CMU-4000 its device number through Label377, and its sending rate is 1/sec

Message format:

Specific data: 8004E5FF

(2) The MCDU simulator reports the health status of its 7 ports and optional ports through real-time status messages (Label270), and the sending rate is 2/sec. the

Message format:

Specific data: 800000B8

(3) After receiving the system label message sent by the MCDU simulator, CMU-4000 uses the system address label message (Label172) to tell the MCDU simulator its SAL, thus starting to establish a data communication mechanism with the MCDU simulator. the

Message format:

Specific data: 8000237A

(4) Enquiry message (ENQ). The ENQ message has two functions. For the MCDU simulator, the ENQ message will be used when initializing the menu and switching between different sub-device menus. The specific usage is as follows:

1) After the MCDU simulator is powered on, in the process of initializing the menu, when the MCDU simulator receives a valid system address label message, the MCDU simulator should send an ENQ message. In this case, the 17-20 bits of the ENQ message are set as the title request, the normal response of the CMU-4000 is to send the title message, and the 17-20 bits of the RTS word of the title message are also the title request. After determining the content of the menu title, the MCDU simulator will send an inquiry message again, requesting to send the page content, and the 17-20 bits of the inquiry message are set as the page content request. the

2) When switching from the current subsystem to CMU-4000, the MCDU emulator sends an inquiry message to CMU-4000, which includes the SAL, MAL and page content request of CMU-4000. Normally, CMU-4000 should send a page message within 200 milliseconds. the

Message format:

Specific data: 850109C4

(5) The RTS word is used when the CMU-4000 requests to send data to the MCDU simulator. The normal request code and menu text code of the RTS word are used for the transmission of the message and the transmission of the menu title content respectively. The specific content of the RTS word and the ENQ The specific query content sent is related to the following situations, and the coding of the function field (17-20bit) is different in different situations. the

1) When the MCDU simulator initializes to create a menu, CMU-4000 responds to the ENQ word sent by the MCDU simulator, and the function field is coded as a menu text request. the

2) After the MCDU simulator determines to display the relevant interface of CMU-4000, CMU-4000 responds to the ENQ word sent by the MCDU simulator, and the function field is coded as a normal request. the

RTS word format

Specific data: 92010190

(6) CTS word, when MCDU simulator receives "RTS" from CMU-4000, MCDU simulator should send CTS word response within 200 milliseconds. When the CMU-4000 communicates with the CMU-4000 as an active state, the CTS word contains the maximum number of acceptable loggers and the subsystem SAL. When CMU-4000 wishes to communicate with CMU-4000 as an inactive state, the MCDU simulator will use CTS word to respond to the display interface switch request (RTS word) sent by the subsystem. At this point, the MCDU simulator sets the maximum record count field of the CTS word to zero. the

Message format:

Specific data: 137F00C4

(7) STX word, "STX" word is the start word of the recording unit. CMU-4000 is the first word when transmitting information. the

Message format:

Specific data: 02010490

(8) The control word is also called CNTRL word, which specifies the starting character position, color, font and line number to start filling the MCDU simulator display. the

Message format:

Specific data: 81810190

(9) Data words, the data between STX and EOT/ETX words (fill 0 if there is no data), complete the upload of the content of the corresponding menu interface according to the specific input request operation of the MCDU simulator. the

Message format:

bits Field Name range illustrate 32 Parity . the 31-25 CH#3 the the twenty four - 0 the 23-17 CH#2 the the 16 - 0 the 15-09 CH#1 the the 08-01 MAL . the

Specific data: 4C443C90

(10) ETX word, when the recording unit is not at the end of the message, the last word of the recording unit is the ETX word. The MCDU simulator should respond with an ACK word. The record sequence number field of the ETX word will repeat the record sequence number in STX. the

Message format:

bits Field Name range illustrate 32 Parity . the 31-25 ETX 0000011b the twenty four - 0 the 23-17 record serial number the the 16-09 - 0 the 08-01 MAL . the

Specific data: ETX not found

(11) EOT word, when the recording unit is at the end of the message, the last word of the recording unit is the ETX word. Normally, the MCDU simulator should respond with an ACK word. the

Message format:

bits Field Name range illustrate 32 Parity . the 31-25 EOT 0000100b the twenty four - 0 the 23-17 last record number the the 16-09 0 the the 08-01 MAL . the

Specific data: 84010090

(12) ACK word, when the MCDU simulator receives the data transmission end mark EOT word (end transmission), ETX word (text transmission end), it will reply ACK word to CMU-4000. the

Message format:

bits Field Name range illustrate 32 Parity . the 31-25 ACK 0000110b the twenty four - 0 the 23-17 record serial number the the 16-9 - 0 the 08-01 SAL . the

Specific data: 860100C4

(13) Key message, the key message is identified by DC1 (bit25-31), responding to the user pressing the key on the MCDU simulator. Key messages include all letter keys, number keys, and function keys. The exception is that the "MCDU Simulator Menu" button and row selection keys when in Main Menu mode will not generate keypress messages. the

Message format:

Specific data: 114100C4

(14) Scratch pad message, the scratch pad message is for CMU-4000 to return the button content input by the user to the MCDU simulator, and display it in the note bar. the

Message format:

Specific data: 11C1E190

3. Simulate DSP by computer, and use simulation software to complete the intercommunication between VDR and DSP through TCP/IP to realize ACARS ground-air communication. the

When CMU-4000 establishes contact with the DSP on the ground, CMU-4000 enters the POA COMM stage. The pilot enters the required menu commands on the MCDU simulator interface and transmits them to CMU-4000 through the 429 communication bus. CMU-4000 communicates with the ground DSP through the VDR. The base station establishes a connection, and transmits the command to the ground workstation, and its ACARS message intercommunication is

CMU-4000 sends Lable Q0, the content of the message is as follows:

CMU-4000>>: <SOH>2.B-2266<NAK>Q00<STX>S00ACA0000<ETX>j_<DEL>

CMU-4000 sends Lable SA, the content of the message is as follows:

CMU-4000>>: <SOH>2.B-2266<NAK>SA1<STX>S01ACA00000EV072758V<ETX>? <NULL><DEL>

CMU-4000 sends Lable52, the content of the message is as follows:

CMU-4000>>: <SOH>2.B-2266<NAK>522<STX>M00ACA0000<ETX>′S<DEL>

4. The DSP workstation on the ground will respond in time after receiving the ACARS message sent by the CMU-4000. After sending the ACARS message to the CMU-4000, it will be displayed on the MCDU simulator panel, such as the DSP in step (3). The ACARS message sent by the workstation is as follows:

.

Claims (2)

1. Collins CMU-4000 Aerial Electronic Equipment ACARS function activation method, it is characterized in that being realized by following steps:

(1) two-way communication is carried out by 429 communication cards between CMU-4000 and MCDU simulator;

(2) set up communication negotiation mechanism between CMU-4000 and MCDU simulator, carry out protocol negotiation;

(3) downstream message transmission;

(4) upstream message transmission.

2. require described Collins CMU-4000 Aerial Electronic Equipment ACARS function activation method according to right 1, wherein the feature of each activation is:

Wherein comprise the avionics system of two terminals in step (1), CMU-4000 and MCDU simulator respectively, both sides carry out two-way communication by 429 communication cards, CMU-4000 has two pieces of control panels, first the link of the power supply pin of CMU-4000 is got up: P1 with P2 plate No. 88 pins are connected with 28VDC forward voltage, P1 with P2 plate No. 87 pins are connected with the ground of 28VDC, and be connected with the ground of the housing of CMU-4000 by P2 plate No. 85 pins, thus ensure that CMU-4000 can activate, when use 429 board communicates is that 1 passage is sent out, 2 passages are received, each passage has AB two ports, the signal of transmission phase difference 180 degree, AB port all will connect, 4 interfaces altogether, respectively by 21 of AB two ports of 1 passage and the P2 of CMU, No. 22 pins are connected, AB two ports of 2 passages are connected with the port of MCDU simulator, by 35 of AB two ports of 2 passages in another one 429 communication card and the P2 of CMU, No. 36 pins are connected, and AB two ports of 1 passage are connected with the port of MCDU simulator, thus complete both sides and communicated by 429 boards, then the foundation of communication negotiation mechanism is carried out,

Step (2) is that avionics system CMU-4000 and MCDU simulator both sides set up communication negotiation mechanism, complete data communication process, first MCDU simulator is told its device number of CMU-4000 by Label377 and is reported the health status of its 7 ports and optional port by real-time status message (Label270), and CMU-4000 is after the system label message receiving the transmission of MCDU simulator, tell MCDU simulator its SAL by system address tag message (Label172), thus the data communication starting to set up between MCDU simulator is machine-processed; Receiving the system label message of CMU-4000, after determining its SAL, MCDU simulator sends apply for information (ENQ), and ENQ message has two functions, and in the process of initialization menu, the 17-20 position of ENQ message is set to title request; After determining menu header content, MCDU simulator can send apply for information again, and request sends content of pages, and the 17-20 position of apply for information is set to content of pages request; And when being switched to CMU-4000 from current sub-system, MCDU simulator sends apply for information to CMU-4000, apply for information comprises SAL, MAL and the content of pages request of CMU-4000; When CMU-4000 request will send data to MCDU simulator, first send RTS word to it, normal request coding and the menu text coding of RTS word are respectively used to the transmission of message and the transmission of menu header content, the content of concrete RTS word is relevant with the specific inquiry content of ENQ, when MCDU simulator initialization menu, CMU-4000 responds the ENQ word that MCDU simulator sends, and RTS word is encoded to menu text request; After display CMU-4000 related interfaces determined by MCDU simulator, CMU-4000 responds the ENQ word that MCDU simulator sends, and RTS word is encoded to normal request; After MCDU simulator receives the RTS that CMU-4000 sends, MCDU simulator sends the response of CTS word in 200 milliseconds; CMU-4000 receive CTS response after, start to transmit data, STX word is the banner word of record cell, for CMU-4000 transmit information time first character, record cell is not at the end of message is, and the last character of record cell is ETX word; MCDU simulator sends ACK word responsively, and when record cell is at message end, the last character of record cell is EOT word, and MCDU simulator sends ACK word and responds, and after CMU-4000 receives ACK word, indicates that this data transfer completes;

The transmission of step (3) downstream message is the menu instructions that pilot inputs needs on MCDU simulator interface, CMU-4000 is passed to by 429 communication buss, CMU-4000 is connected by VDR and DSP base station, ground, instruction is passed to ground handling station, time as worked as aircraft standby for takeoff, pilot is when communicating with ground DSP work station, need to report its flight plan, MCDU simulator panel there is AOC menu, flight plan is sent to DSP by button by pilot, after pressing FLN PLAN*, CMU sends Lable80, if under message content:

CMU>>：<SOH>2.B-2266<NAK>800<STX>M07ACA11123L01 FLTPLN 1112/25ZBAA/ZHHH.B-2266<ETX>～<DEL><DEL>

The transmission of step (4) upstream message be exactly ground DSP work station after receiving the ACARS message that CMU-4000 sends can timely to response, sending after ACARS message passes to CMU-4000 is presented on MCDU simulator panel, and the ACARS message sent as ground handling station in step (3) is as follows:

Thus complete the uplink of ACARS message, realize the earth-space communication of ACARS message.