Cabin pressure change rate control method and system

Abstract

The invention belongs to the technical field of aircraft cockpit pressure control, and particularly relates to a cockpit pressure change rate control method, which comprises the following steps of: receiving a cockpit pressurization or cockpit pressure relief opening instruction of an operator; when the opening instruction has a pressure change rate set value, the pressure change rate set value serves as a working change rate to conduct pressure relief / pressurization recovery on the cabin, and when the opening instruction does not have the pressure change rate set value, a preset default pressure change rate serves as the working change rate to conduct pressure relief / pressurization recovery on the cabin; and based on the working change rate, calculating the estimated time from the current cabin pressure value to the target cabin pressure value, and displaying the estimated time on a screen.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft cabin pressure control, and in particular relates to a method for controlling cabin pressure change rate. Background Art

[0002] When an aircraft is flying in the air, the cabin needs to be pressurized to ensure the comfort of the cabin personnel. The cabin pressure corresponding to different flight altitudes is basically the same, and the cabin pressure is usually greater than the flight environment pressure. When performing tasks such as aerial firefighting, the cabin will be depressurized, and the cabin will resume pressurization after the mission is completed. Different cabin pressure change rates affect the comfort of cabin personnel and the mission execution time. A large cabin pressure change rate means a short mission time and poor comfort; a small cabin pressure change rate means good comfort and a long mission time. Summary of the invention

[0003] In order to solve the above problems, the present application provides a cabin pressure change rate control method, comprising:

[0004] Receiving cabin depressurization or cabin repressurization start command from the operator;

[0005] When the opening instruction has a pressure change rate setting value, the pressure change rate setting value is used as the working change rate to depressurize / restore pressurization of the cabin; when the opening instruction does not have a pressure change rate setting value, the preset default pressure change rate is used as the working change rate to depressurize / restore pressurization of the cabin;

[0006] Based on the working change rate, the estimated time for the current cabin pressure value to complete decompression / repressurization to the target cabin pressure value is calculated and displayed on the screen.

[0007] Preferably, when the cabin is depressurized / repressurized using a preset default pressure change rate as the working change rate, a pressure change rate setting value input by an operator is received and the cabin is depressurized / repressurized using the pressure change rate setting value as the working change rate.

[0008] Preferably, when the opening instruction has a pressure change rate setting value or a pressure change rate setting value input by an operator is received, a corresponding alarm is issued.

[0009] Preferably, the pressure change rate setting value includes a plurality of preset pressure change rate values ​​for operators to select.

[0010] Preferably, the method for depressurizing / restoring pressurization of the cabin includes:

[0011] Calculate the pressure difference between the current cabin pressure value and the target cabin pressure value;

[0012] Obtaining, by experiment, the relationship between the pressure difference and the power required by the cabin pressure regulating device to regulate the same pressure value per unit time;

[0013] Fitting a relationship curve between the pressure difference and the required power;

[0014] The power of the cabin pressure regulating device is corrected by using the relationship curve and the pressure difference, so that the cabin pressure regulating device can depressurize / restore pressurization of the cabin according to the working change rate.

[0015] A cabin pressure control system with adjustable cabin pressure change rate,

[0016] A touch screen control module, used to receive cabin pressurization or cabin depressurization start instructions from the operator and pressure change rate settings;

[0017] A cabin pressure regulating device; when the opening instruction has a pressure change rate setting value, the cabin pressure regulating device uses the pressure change rate setting value as the working change rate to control the cabin exhaust valve angle to depressurize / restore pressurization of the cabin; when the opening instruction does not have a pressure change rate setting value, the cabin pressure regulating device uses a preset default pressure change rate to control the cabin exhaust valve angle as the working change rate to depressurize / restore pressurization of the cabin;

[0018] The time display module is used to calculate the estimated time from the current cabin pressure value to the target cabin pressure value in real time through the working change rate, and display it on the screen.

[0019] Preferably, the alarm module issues a corresponding alarm when the opening instruction has a pressure change rate setting value or receives a pressure change rate setting value input by an operator.

[0020] Preferably, the touch screen control module has a plurality of preset pressure change rates for the operator to select.

[0021] Preferably, the warning includes a text display warning or an identifier display warning. The advantages of the present application include: when performing a cabin depressurization / repressurization task, the estimated completion time of the task is calculated, and the crew adjusts the cabin pressure change rate according to the characteristics of the task, and can select a cabin pressure change rate with high comfort or short task execution time to meet the needs of different tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the processing logic of the pressure change rate when the cabin is depressurized.

[0023] Figure 2 It is the processing logic of the pressure change rate when the cabin is restored to pressurization. DETAILED DESCRIPTION

[0024] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0025] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0026] like Figure 1-Figure 2 As shown, the present application provides a method for controlling a cabin pressure change rate, comprising: receiving a cabin pressurization or cabin depressurization start instruction from an operator;

[0027] When the opening instruction has a pressure change rate setting value, the pressure change rate setting value is used as the working change rate to depressurize / restore pressurization of the cabin; when the opening instruction does not have a pressure change rate setting value, the preset default pressure change rate is used as the working change rate to depressurize / restore pressurization of the cabin;

[0028] Based on the working change rate, the estimated time from the current cabin pressure value to the target cabin pressure value is calculated in real time and displayed on the screen.

[0029] In some optional embodiments, when the cabin is depressurized / repressurized using a preset default pressure change rate as the working change rate, a pressure change rate setting value input by an operator is received and the cabin is depressurized / repressurized using the pressure change rate setting value as the working change rate.

[0030] In some optional implementations, when the opening instruction has a pressure change rate setting value or a pressure change rate setting value input by an operator is received, a corresponding alarm is issued.

[0031] In some optional embodiments, the pressure change rate setting value includes a plurality of preset pressure change rate curves for operators to select.

[0032] In some optional embodiments, the method for depressurizing / restoring pressurization of the cabin includes:

[0033] When the cabin is depressurized, the target cabin pressure value is set to the ambient pressure;

[0034] When the cabin is restored to pressurization, the cabin pressure corresponding to the current flight altitude during normal pressurization is calculated as the target cabin pressure value according to the fixed cabin pressure system;

[0035] Calculate the pressure difference between the current cabin pressure value and the target cabin pressure value;

[0036] The cabin pressure and pressure change rate are controlled by controlling the cabin exhaust valve angle according to the pressure difference and the set change rate;

[0037] When the pressure difference is 0, the cabin depressurization is completed, and when the cabin pressure reaches the cabin theoretical pressure target, the recovery pressurization is completed;

[0038] The cabin exhaust valve angle is corrected by the target cabin pressure value and the pressure difference, so that the cabin pressure regulating device can depressurize / restore pressurization of the cabin according to the working change rate.

[0039] A cabin pressure control system with adjustable cabin pressure change rate,

[0040] The touch screen control module is used to receive the cabin pressurization or cabin depressurization start command from the operator; the touch screen control module includes a time display module, which is used to calculate the estimated time from the current cabin pressure value to the target cabin pressure value through the working change rate, and display it on the screen.

[0041] a cabin pressure regulating device; when the opening instruction has a pressure change rate setting value, the cabin pressure regulating device uses the pressure change rate setting value as the working change rate to depressurize / restore pressurization of the cabin; when the opening instruction does not have a pressure change rate setting value, the cabin pressure regulating device uses a preset default pressure change rate as the working change rate to depressurize / restore pressurization of the cabin;

[0042] When the aircraft enters the cabin depressurization mode, the cabin pressure controller controls the cabin pressure according to the default change rate, and calculates the estimated mission time in real time and sends it to the touch screen control module for display on the diagram page. When the cabin depressurization change rate is adjusted and set, the avionics system sends the set value to the cabin pressure controller, and the cabin pressure controller controls the cabin pressure according to the set change rate and issues a "cabin pressure change rate manual control" alarm;

[0043] When the aircraft enters the cabin pressurization mode, the cabin pressure controller controls the cabin pressure according to the default change rate, and calculates the estimated mission time in real time and sends it to the diagram page for display. When the cabin pressurization change rate is adjusted and set, the avionics system sends the set value to the cabin pressure controller, and the cabin pressure controller controls the cabin pressure according to the set change rate and issues a "cabin pressure change rate manual control" alarm;

[0044] When the aircraft is not in the cabin depressurization or cabin pressurization mode, the estimated cabin depressurization time and the estimated cabin re-pressurization time are not displayed.

[0045] In some optional embodiments, the touch screen control module has a plurality of preset pressure change rate curves for the operator to select.

[0046] The advantages of the present application include: when performing a cabin depressurization / pressurization mission, the estimated completion time of the mission is calculated, and the crew adjusts the cabin pressure change rate based on the mission characteristics. The cabin pressure change rate with high comfort or short mission execution time can be selected to meet the needs of different missions.

[0047] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for controlling cabin pressure change rate, characterized in that: include: Receiving cabin pressurization or cabin depressurization start command from the operator; When the opening instruction has a pressure change rate setting value, the pressure change rate setting value is used as the working change rate to depressurize / restore pressurization of the cabin; when the opening instruction does not have a pressure change rate setting value, the preset default pressure change rate is used as the working change rate to depressurize / restore pressurization of the cabin; Based on the operating change rate, the estimated time from the current cabin pressure value to the target cabin pressure value is calculated and displayed on the screen.

2. The cabin pressure change rate control method according to claim 1, characterized in that: When the cabin is depressurized / repressurized using a preset default pressure change rate as the working change rate, a pressure change rate setting value input by an operator is received and the cabin is depressurized / repressurized using the pressure change rate setting value as the working change rate.

3. The cabin pressure change rate control method according to claim 2, characterized in that: When the opening instruction has a pressure change rate setting value or a pressure change rate setting value input by an operator is received, a corresponding alarm is issued.

4. The cabin pressure change rate control method according to claim 3, characterized in that: The pressure change rate setting value includes a plurality of preset pressure change rate curves for the operator to select.

5. The cabin pressure change rate control method according to claim 4, characterized in that: The pressure change rate curve includes a straight line with a constant pressure change rate and a gradual curve with a pressure change rate that gradually increases from a small value to a large value and then gradually decreases.

6. A cabin pressure change rate control system, characterized in that: A touch screen control module, used to receive cabin pressurization or cabin depressurization start instructions from the operator; a cabin pressure regulating device; when the opening instruction has a pressure change rate setting value, the cabin pressure regulating device uses the pressure change rate setting value as the working change rate to depressurize / restore pressurization of the cabin; when the opening instruction does not have a pressure change rate setting value, the cabin pressure regulating device uses a preset default pressure change rate as the working change rate to depressurize / restore pressurization of the cabin; The time display module is used to calculate the estimated time from the current cabin pressure value to the target cabin pressure value through the working change rate, and display it on the screen.

7. The cabin pressure change rate control system according to claim 6, characterized in that: The alarm module issues a corresponding alarm when the opening instruction has a pressure change rate setting value or receives a pressure change rate setting value input by an operator.

8. The cabin pressure change rate control system according to claim 6, characterized in that: The touch screen control module has a plurality of preset pressure change rate curves for the operator to select.

9. The cabin pressure change rate control system according to claim 6, characterized in that: The pressure change rate curve includes a straight line with a constant pressure change rate and a gradual curve with a pressure change rate gradually increasing from small to large and then gradually decreasing.

10. The cabin pressure change rate control system according to claim 6, characterized in that: The warning includes a text display warning or an identifier display warning.

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