Display and alarm method for automatic flight control system of airplane

Abstract

The invention belongs to the technical field of aircraft flight control systems, and relates to a display and alarm method of an aircraft automatic flight control system. Comprising the following steps: step 1, determining whether an internal monitoring system of the automatic flight control system works abnormally; step 2, under an abnormal condition, sending an alarm signal to a centralized alarm system, and triggering light, display and voice alarm of a corresponding level; and step 3, when the automatic flight control system sends an alarm cancelling signal to the centralized alarm system effectively, light, display and voice alarm are cancelled.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft flight control systems and relates to a display and warning method for an aircraft automatic flight control system. Background Art

[0002] The automatic flight control system stabilizes the aircraft's attitude, heading, and altitude within the main flight mission profile, and automatically controls the aircraft's flight according to the predetermined heading, course, track, and altitude. The automatic flight control system can reduce the pilot's workload. The automatic flight control system display and warning are important functions of the automatic flight control system, and are an important channel for flight crew members to interact with the automatic flight control system. They are mainly used to feedback the automatic flight control system's working status, faults, functional failures, or abnormal conditions, prompting pilots to take appropriate measures to avoid improper operations under fault conditions that damage the aircraft or even endanger flight safety.

[0003] The integrated design of automatic flight control system display and warning is based on the display and warning of traditional systems, coordinates on-board display and warning resources, identifies system working scenarios, adopts different warning strategies, and rationally plans system display and warning design, so that the system human-computer interaction function is efficient, the screen display is reasonable, and the warning logic is clear. The research and application of this technology is conducive to improving the human-computer interaction efficiency between the flight crew and the automatic flight control system, accurately transmitting information to the pilot to the maximum extent, optimizing the decision-making and operation process, improving the safety of the system, and reducing the burden on the pilot. Summary of the invention

[0004] Purpose of the invention: To provide a display and warning method for an aircraft automatic flight control system to improve flight safety.

[0005] Technical solution:

[0006] A display and warning method for an aircraft automatic flight control system, comprising:

[0007] Step 1: Check whether the internal monitoring system of the automatic flight control system is working abnormally;

[0008] Step 2: In the event of an abnormality, an alarm signal is sent to the centralized alarm system to trigger the corresponding level of lighting, display, and voice alarms;

[0009] Step 3: When the automatic flight control system sends a cancellation warning signal to the centralized warning system and it is effective, the light, display and voice warnings are cancelled.

[0010] Furthermore, in step 2, the alarm level includes three levels: warning level, attention level, and prompt level.

[0011] Furthermore, warning-level alarms include: autopilot disconnect alarm, autopilot failure alarm, auto-throttle disconnect alarm, auto-throttle failure alarm, and automatic pull-up alarm; attention-level alarms include: approach altitude warning alarm, deviation altitude warning alarm, airspeed protection warning, and pre-selected vertical speed / track inclination polarity reverse warning; prompt-level alarms include: mission mode failure alarm, navigation mode failure alarm, pre-selected altitude failure alarm, and approach failure alarm.

[0012] Furthermore, step 2 specifically includes:

[0013] When the autopilot and autothrottle are disconnected, a continuous voice broadcast is made; the "main warning" lights in the left and right warning light boxes flash; at the same time, the HUD flashes the "warning" character; the warning display area flashes red warning characters and warning information.

[0014] Furthermore, step 2 specifically includes:

[0015] In case of autopilot failure and automatic pull-up failure, the "main warning" lights in the left and right warning light boxes flash; at the same time, the HUD flashes the "warning" character; the warning display area flashes red warning characters and warning information.

[0016] Furthermore, step 2 specifically includes:

[0017] When approaching or deviating from high alert, a secondary voice broadcast will be made, and the "main attention" lights in the left and right warning light boxes will flash; the warning display area will flash yellow warning characters and warning information.

[0018] Furthermore, step 2 specifically includes:

[0019] In case of airspeed protection warning or pre-selected vertical speed / track inclination polarity reverse warning, the "Master Attention" lights in the left and right warning light boxes flash; the warning display area flashes yellow warning characters and warning information.

[0020] Furthermore, step 2 specifically includes:

[0021] In case of mission mode or navigation mode failure, a secondary voice broadcast is made and the alarm display area flashes yellow alarm characters and alarm information.

[0022] Furthermore, step 2 specifically includes:

[0023] In the event of failure of the preselected altitude, the warning display area will flash yellow warning characters and warning information.

[0024] Beneficial effects:

[0025] The present invention divides the automatic flight control system alarms into different levels according to the importance of the alarm information, concretizes the alarm information according to the system function, adopts different alarm strategies for different scenarios, and accurately transmits the information to the crew in a complex environment, thereby solving the problem that the system state change is not easy for the crew to perceive, the crew misjudges and misoperates, shortens the system fault handling time, optimizes the crew's decision-making and operation process, and improves flight safety. The automatic flight control system alarm is designed with a multi-level sound, light and voice alarm fusion, which solves the problem of excessive interference between display and alarm, ensures that the unsafe working conditions of the system can be perceived by the crew and do not interfere with the crew, and makes human-computer interaction more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 This is a diagram of the warning level division of the automatic flight control system.

[0027] Attached Figure 2 This is a schematic diagram of the automatic flight control system warning mode.

[0028] Attached Figure 3 It is a schematic diagram of the warning process of the automatic flight control system. DETAILED DESCRIPTION

[0029] The fault tolerance of the automatic flight control system is to work with one fault and be safe with two faults. The warning information is designed by analyzing the system functions and hazards. According to the urgency of the warning information in endangering flight safety and the impact on the completion of the flight mission, the automatic flight control system is designed with warning-level warnings, prompt-level warnings, and attention-level warnings;

[0030] The automatic flight control system is designed with warning-level alarms to warn pilots of failures of important system functions, including: when a warning-level alarm is triggered, the alarm content is displayed in red font in the system's main alarm display area, the red "warning" character flashes on the head-up display, the red "main alarm" light flashes on the warning light box, and two alarm contents are broadcast simultaneously. Warning-level alarms can suppress prompt-level alarms and caution-level alarms, and can be suppressed by danger-level alarms. Press the main warning alarm light, and the main warning alarm light changes from flashing to lit. When the main warning-level fault disappears, the corresponding main warning alarm light goes out;

[0031] The automatic flight control system is designed with attention-level warnings to remind pilots of important flight information, including: when an attention-level warning is triggered, the warning content is displayed in yellow font in the system's main warning display area, and the yellow "Attention" character flashes on the head-up display, and the yellow "Main Attention" light flashes on the warning light box. Attention-level warnings can suppress prompt-level warnings, and can be suppressed by warning-level warnings and danger-level warnings. Press the main attention warning light, and it changes from flashing to lit. When the main attention-level fault disappears, the corresponding main attention warning light goes out;

[0032] The automatic flight control system has newly designed reminder-level warnings to alert pilots of the failure of some functional modes, including: when the reminder-level warning is triggered, the prompt information is displayed only in blue font in the warning display area of ​​the display, which can be observed by the pilot and will not interfere with other warnings.

[0033] In conjunction with the accompanying drawings, a display and warning method for an aircraft automatic flight control system is described in detail below. Figure 1-3 , the method comprising:

[0034] 1) Automatic flight control system alarms are divided into three levels: warning level, attention level, and prompt level according to the importance of the alarm information;

[0035] 2) The automatic flight control system converts warning information from the system level to the functional mode level, and the warning information accurately conveys the abnormal working status of the system;

[0036] 3) The autopilot disconnect alarm is a warning-level alarm. When the automatic flight control system detects that the autopilot is disconnected, it sends an alarm signal to the centralized alarm system. When the centralized alarm system receives a valid alarm signal, it triggers the alarm. The red font "Warning||Autopilot disconnected" is displayed in the alarm display area of ​​the multi-function display, and the "Warning" character flashes in the head-up display area; the red "master warning" lights on the left and right warning light boxes flash; the voice "Autopilot disconnected" is continuously broadcast in the cockpit; the centralized alarm system stops triggering the alarm when it receives a valid cancellation alarm signal;

[0037] 4) The auto-throttle disconnect alarm is a warning-level alarm. When the automatic flight control system detects that the auto-throttle is disconnected, it sends an alarm signal to the centralized alarm system. When the centralized alarm system receives a valid alarm signal, the alarm is triggered. The red font "Warning||Auto-throttle disconnected" is displayed in the alarm display area of ​​the multi-function display, and the "Warning" character flashes in the head-up display area; the red "master warning" lights on the left and right warning light boxes flash; the voice "auto-throttle disconnected" is continuously broadcast in the cockpit; the centralized alarm system stops triggering the alarm when it receives a valid cancellation alarm signal;

[0038] 5) The autopilot failure alarm is a warning-level alarm. When the automatic flight control system detects an autopilot failure, it sends an alarm signal to the centralized alarm system. When the centralized alarm system receives a valid alarm signal, it triggers the alarm. The red font "Warning||Autopilot Failure" is displayed in the alarm display area, and the "Warning" character flashes in the head-up display area; the red "Master Warning" lights on the left and right warning light boxes flash; the centralized alarm system stops triggering the alarm when it receives a valid cancel alarm signal;

[0039] 6) The auto-throttle failure alarm is a warning-level alarm. When the automatic flight control system detects an auto-throttle failure, it sends an alarm signal to the centralized alarm system. When the centralized alarm system receives a valid alarm signal, it triggers the alarm. The red font "Warning||Auto-throttle failure" is displayed in the alarm display area, and the "Warning" character flashes in the head-up display area; the red "master warning" lights on the left and right warning light boxes flash; the centralized alarm system stops triggering the alarm when it receives a valid cancel alarm signal;

[0040] 7) The automatic pull-up warning is a warning-level warning. When the automatic flight control system detects an abnormal state of automatic pull-up, it sends a warning signal to the centralized warning system. When the centralized warning system receives a valid warning signal, it triggers the warning, and displays "Warning||Automatic pull-up" in red font in the warning display area, and the "Warning" character flashes in the head-up display area; the red "main warning" lights on the left and right warning light boxes flash; the secondary voice "Automatic pull-up" is broadcast in the cockpit; the centralized warning system stops triggering the alarm when it receives a valid cancellation warning signal;

[0041] 8) The approach altitude warning alarm is a caution-level alarm. When the autopilot controls the aircraft to approach the pre-selected altitude, it sends an alarm signal to the centralized warning system. The centralized warning system triggers the alarm when it receives a valid alarm signal. The yellow font "Caution|| Approaching pre-selected altitude" is displayed in the alarm display area of ​​the display; the yellow "Main Attention" lights on the left and right warning light boxes flash; the secondary voice "Approaching altitude" is broadcast in the cockpit; the centralized warning system stops triggering the alarm when it receives a valid cancel alarm signal;

[0042] 9) The altitude deviation warning is a caution-level warning. When the automatic flight control system detects that the autopilot controls the aircraft to deviate from the pre-selected altitude within a certain range, it sends a warning signal to the centralized warning system. The centralized warning system triggers the warning when it receives a valid warning signal. The yellow font "Caution || Deviation from pre-selected altitude" is displayed in the warning display area of ​​the display; the yellow "main caution" lights on the left and right warning light boxes flash; the secondary voice "altitude deviation" is broadcast in the cockpit; the centralized warning system stops triggering the alarm when it receives a valid cancellation warning signal;

[0043] 10) The airspeed protection alarm is a caution-level alarm. When the automatic flight control system detects that the airspeed of the aircraft controlled by the autopilot is lower than the set value and enters the airspeed protection, it sends an alarm signal to the centralized warning system. The centralized warning system triggers the alarm when it receives a valid alarm signal, and displays "Caution||Airspeed Protection" in yellow font in the alarm display area of ​​the display; the yellow "Main Caution" lights on the left and right warning light boxes flash; the secondary voice "Airspeed Protection" is broadcast in the cockpit; the centralized warning system stops triggering the alarm when it receives a valid cancellation alarm signal;

[0044] 11) The pre-selected vertical speed / track inclination polarity inversion warning is a caution-level warning. When the automatic flight control system detects that the pre-selected vertical speed / track inclination polarity does not match the pre-selected altitude polarity, it sends a warning signal to the centralized warning system. The centralized warning system triggers the warning when it receives a valid warning signal, and displays "Caution||Pre-selected vertical speed / track inclination polarity inversion" in yellow font in the warning display area of ​​the display; the yellow "main caution" lights on the left and right warning light boxes flash; the centralized warning system stops triggering the warning when it receives a valid cancellation warning signal;

[0045] 12) The mission mode failure alarm is a prompt-level alarm. When the automatic flight control system detects that the system has lost the mission command in the mission mode and automatically exits the mission mode, it sends an alarm signal to the centralized warning system. The centralized warning system triggers the alarm when it receives a valid alarm signal, and displays "Prompt|| Mission mode failure" in blue font in the alarm display area of ​​the display; a secondary voice "Mode switch" is broadcast in the cockpit; the centralized warning system stops triggering the alarm when it receives a valid cancellation alarm signal;

[0046] 13) The navigation mode failure alarm is a prompt-level alarm. When the automatic flight control system detects that the system has lost the control command in the navigation mode and automatically exits the navigation mode, it sends an alarm signal to the centralized warning system. The centralized warning system triggers the alarm when it receives a valid alarm signal, and displays "Prompt||Navigation mode failure" in blue font in the alarm display area of ​​the display; a secondary voice "mode switch" is broadcast in the cockpit; the centralized warning system stops triggering the alarm when it receives a valid cancel alarm signal;

[0047] 14) The preselected altitude failure alarm is a prompt-level alarm. When the automatic flight control system detects that the system loses the preselected altitude signal in the vertical speed preselection, airspeed hold, and airspeed preselection modes, it sends an alarm signal to the centralized warning system. The centralized warning system triggers the alarm when it receives a valid alarm signal, and displays "Prompt||Preselected altitude failure" in blue font in the alarm display area of ​​the display; the centralized warning system stops triggering the alarm when it receives a valid cancel alarm signal;

[0048] 15) The approach failure alarm is a prompt-level alarm. When the automatic flight control system detects that the system has lost signals such as heading deviation and cannot enter the approach mode, it sends an alarm signal to the centralized warning system; the centralized warning system triggers the alarm when it receives a valid alarm signal, and displays "Prompt||Approach Failure" in blue font in the alarm display area of ​​the display; the centralized warning system stops triggering the alarm when it receives a valid cancel alarm signal.

[0049] The present invention solves the problems of unclear warning during unexpected disconnection and mode conversion of the automatic flight control system and excessive interference of the sound and light warning to the crew, thereby ensuring that the unsafe working conditions of the system can be detected by the crew and do not interfere with the crew.

[0050] It solves the problem of the automatic flight control system having multiple functional modes and working states, which are prone to confusion. It minimizes the errors and confusion caused by the flight crew about the working state and characteristics of the automatic flight control system, reduces crew operating errors and improves flight safety.

Claims

1. A display and warning method for an aircraft automatic flight control system, characterized in that: include: Step 1: Check whether the internal monitoring system of the automatic flight control system is working abnormally; Step 2: In the event of an abnormality, an alarm signal is sent to the centralized alarm system to trigger the corresponding level of lighting, display, and voice alarms; Step 3: When the automatic flight control system sends a cancellation warning signal to the centralized warning system and it is effective, the light, display and voice warnings are cancelled.

2. The method according to claim 1, characterized in that In step 2, the alarm levels include warning level, attention level, and prompt level.

3. The method according to claim 2, characterized in that Warning-level warnings include: autopilot disconnect warning, autopilot failure warning, auto-throttle disconnect warning, auto-throttle failure warning, and automatic pull-up warning; attention-level warnings include: approach altitude warning warning, deviation altitude warning warning, airspeed protection warning, and pre-selected vertical speed / track inclination polarity reverse warning; prompt-level warnings include: mission mode failure warning, navigation mode failure warning, pre-selected altitude failure warning, and approach failure warning.

4. The method according to claim 2, characterized in that: Step 2 specifically includes: When the autopilot and autothrottle are disconnected, a continuous voice broadcast is made; the "main warning" lights in the left and right warning light boxes flash; at the same time, the HUD flashes the "warning" character; the warning display area flashes red warning characters and warning information.

5. The method according to claim 2, characterized in that: Step 2 specifically includes: In case of autopilot failure and automatic pull-up failure, the "main warning" lights in the left and right warning light boxes flash; at the same time, the HUD flashes the "warning" character; the warning display area flashes red warning characters and warning information.

6. The method according to claim 2, characterized in that Step 2 specifically includes: In the case of approaching high alert or deviating from high alert, a secondary voice broadcast is made, and the "main attention" lights in the left and right warning light boxes flash; the warning display area flashes yellow warning characters and warning information.

7. The method according to claim 2, characterized in that Step 2 specifically includes: In case of airspeed protection warning or preselected vertical speed / track inclination polarity reverse warning, the "main attention" lights in the left and right warning light boxes flash; the warning display area flashes yellow warning characters and warning information.

8. The method according to claim 2, characterized in that: Step 2 specifically includes: In case of mission mode or navigation mode failure, a secondary voice broadcast is made and the alarm display area flashes yellow alarm characters and alarm information.

9. The method according to claim 2, characterized in that: Step 2 specifically includes: In the event of failure of the preselected altitude, the warning display area will flash yellow warning characters and warning information.

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