CN102621899B - Method for opening reverse thrust system of airplane power device - Google Patents

Abstract

The present invention provides a method for opening the thrust reverse system of an aircraft power unit, comprising: providing a human-machine interaction interface of an aircraft cockpit aero-electric on-board maintenance system; setting a ground maintenance override software switch on the human-computer interaction interface; The ground maintenance override software switch communicates with at least one controller that realizes reverse thrust control; after receiving the signal from the ground maintenance override software switch, the controller judges and controls the operation of the reverse thrust system according to the state of the current engine through control logic. actuator to open the thrust reverser cowling of the thrust reverser system. The invention adopts a soft switch to realize the function of the ground maintenance override switch of the reverse thrust system, which not only reduces the hard wire connection, but also reduces the maintenance steps, the work burden of the ground staff and the maintenance tools.

Description

A method for opening the thrust reverser system of an aircraft power plant

technical field

The invention relates to a method for opening the reverse thrust system of an aircraft power plant, in particular to a method for using a soft switch to open the thrust reverse system of an aircraft power plant during ground maintenance.

Background technique

When the thrust reverser system of the aircraft power plant is being maintained on the ground, it is necessary to open the thrust reverser cover for inspection and maintenance. This requires a separate ground maintenance override (GMO) switch, so that the thrust reverser can open the thrust reverser system under the condition that the normal thrust reverser control logic is not satisfied, so that the ground crew can check the thrust reverser system. Actuating mechanism.

In the prior art, a physical hard switch is usually arranged on the surface of the nacelle of the engine, that is, a Ground Maintenance Override (GMO) switch, which is connected to the controller of the engine—Full Authority Electronic Controller FADEC—through hard wires. When the ground crew pushes the hard switch on the surface of the nacelle with a tool, FADEC receives a hard-wire signal, and converts the hard-wire signal into a bus signal and sends it to the engine interface control unit—EICU. According to the current state of the engine, FADEC and EICU can unlock the thrust reverser system. At this time, the thrust reverser cover can be opened, and the ground crew can carry out maintenance work.

It is not difficult to see that the above scheme requires the ground crew to use some tools to forcefully push the hard switch to generate an analog control signal before unlocking and opening the thrust reverser cover. Such a solution not only increases electronic equipment and hard-wired interfaces, but also requires cumbersome maintenance steps, and the workload of ground crews is also relatively heavy.

Yet all active aircraft all adopt this method to open the thrust reverser cover of power unit thrust reverser system at present and carry out ground maintenance work, thereby urgently need a kind of method that can realize opening thrust reverser cover quickly and easily without any tool method.

Contents of the invention

The purpose of the present invention is to provide a more convenient and simple method to realize the function of the Ground Maintenance Override (GMO) switch of the thrust reverser system.

In order to achieve the above object, the present invention provides a kind of method that realizes the GMO switch of reverse thrust system with software switch, and this method realizes by following scheme:

A method for opening a thrust reverser system of an aircraft power plant, comprising: providing a human-computer interaction interface of an aircraft cockpit avionics on-board maintenance system; setting a ground maintenance override software switch on the human-computer interaction interface; The control software switch communicates with at least one controller that realizes the reverse thrust control; after the controller receives the signal of the ground maintenance override software switch, it judges and controls the actuator of the thrust reverse system according to the state of the current engine through control logic. Open the thrust reverser cover of the thrust reverser system.

Preferably, the ground maintenance override software switch communicates with the controller for reverse thrust control through a data bus.

Preferably, the ground maintenance override software switch is set under the startup test function of the human-computer interaction interface.

Through the above technical solution, when the aircraft needs to perform ground maintenance of the reverse thrust system, the soft switch of GMO can be selected on the maintenance interface of the engine, and the switch command signal will be transmitted to the controller that completes the reverse thrust control through the transmission network of the aircraft at the same time . After receiving the switch command signal, the controller that completes the reverse thrust control will judge and control the actuators of the thrust reverse system to unlock the thrust reverse system in turn according to the current state of the engine and through the control logic, so as to complete the work of opening the thrust reverse cover.

Here, the command to open the thrust reverser cover is completed by the internal logic of the controller that completes the thrust reverser control, and at least one controller jointly unlocks the thrust reverser system. The conclusion of the safety analysis shows that this scheme will not affect the safety of the aircraft, and there is no special requirement for the software level of the airborne maintenance system. Therefore, using a soft switch to realize the ground maintenance override switch function of the thrust reverser system not only reduces the hard wire connection, but also reduces the maintenance steps, the work burden of the ground crew and the maintenance tools, and it is also an important aspect of the comprehensive trend of civil aircraft systems. reflect.

Description of drawings

More features and advantages of the present invention will be better understood through the further detailed description of specific embodiments in conjunction with the accompanying drawings. in:

Fig. 1 is a module block diagram according to an embodiment of the method of the present invention;

Fig. 2 is a schematic diagram of the man-machine interface of the aircraft on-board maintenance system according to a preferred embodiment of the present invention;

Fig. 3 is a block diagram of modules implementing the method of the present invention according to the preferred embodiment shown in Fig. 2 .

Detailed ways

Referring first to FIG. 1 , it shows a block diagram of modules according to an embodiment of the method of the present invention. According to the present invention, a friendly engine maintenance man-machine interaction interface can be set on the display screen of the aircraft cockpit avionics on-board maintenance system, and a GMO soft switch can be set on the maintenance interface. The GMO soft switch can communicate with at least one controller that realizes reverse push control through a data bus, and two such controllers are exemplarily shown in Figure 1, and the controller can communicate with the reverse push system through an electrical interface (Electrical interface) The actuator (Actuation of Reverser Thrust) is electrically connected, so as to respond to the command signal of the GMO soft switch, open the three locks of the thrust reverser system, and complete the work of opening the thrust reverser cover.

Preferably the GMO soft switch is set under the InitiatedTest function of the human-computer interaction interface, as shown in Figure 2, the original functions under this function interface, such as maintenance-dispatch clear switch (TLD Clean Switch), over-limit clear Zero switch (Exceed CleanSwitch) etc. are still reserved. With this setting, the original start-up test function is not disturbed, and since the function of the avionics start-up test man-machine interface is suppressed in the air, this effectively avoids the opening of the reverse thrust cover due to misoperation of the GMO soft switch risks of.

When performing ground maintenance work on the thrust reverser system of the aircraft, as shown in Figure 3, when the GMO soft switch communicates with the two controllers FADEC and EICU that realize reverse thrust control at the same time, it is only necessary to power on the FADEC and EICU , and then select the GMO soft switch on the human-computer interaction interface of the airborne maintenance system, the switch command signal can be transmitted to FADEC through the cross-link data bus of avionics and power unit, such as ARINC664, and at the same time can be transmitted through the cross-link data of avionics and EICU The bus such as ARINC429 transmits to EICU. After receiving the switch command signal, FADEC and EICU will judge and control the actuators of the thrust reverser system to open the three channels of the thrust reverser system in sequence according to the current engine status (such as wheel load signal, airspeed, N2, etc.) lock to complete the work of opening the thrust reverser cover. It should be understood that the above-mentioned data buses ARINC664 and ARINC429 are both used in the original aircraft control function, and here only the data function is additionally used to realize the soft operation of the GMO switch, which has no effect on the original bus function. In addition, through security analysis, the scheme of the present invention has the same security level as the conventional hard switch scheme. In contrast, the present invention does not need to use any tools, and only needs to select the GMO soft switch on the human-computer interaction interface of the aircraft airborne maintenance system in the cockpit to achieve the purpose of opening the reverse thrust cover, and the operation is more convenient and reliable .

The preferred embodiment above exemplarily describes the manner in which the GMO soft switch communicates with the FADEC and the EICU at the same time. It should be understood that the method of the present invention is also applicable to the manner in which the GMO soft switch communicates with only one controller. For example, the GMO communicates with the engine controller FADEC through the data bus, and the FADEC transmits the switch command signal to the EICU through the avionics network, and then the EICU controls the logic to open the reverse thrust cover. This embodiment is likewise advantageous compared to the prior art.

The technical content and technical characteristics of the present invention have been disclosed above, but it can be understood that under the creative idea of the present invention, those skilled in the art can make various changes and improvements to the above-mentioned embodiments, but all belong to the protection scope of the present invention. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims (2)

1. A method for opening an aircraft powerplant thrust reverser system, comprising: Provide the human-computer interaction interface of the aircraft cockpit avionics on-board maintenance system; Setting a ground maintenance override software switch on the human-computer interaction interface; The ground maintenance override software switch is in communication with at least one controller implementing thrust reverse control; After the controller receives the signal of the ground maintenance override software switch, according to the current state of the engine, it judges and controls the actuator of the thrust reverser system to open the thrust reverser cover of the thrust reverser system through control logic judgment, Wherein, the ground maintenance override software switch is set under the start-up test function of the human-computer interaction interface. 2. The method for opening the thrust reverser system of the aircraft power unit according to claim 1, wherein the ground maintenance override software switch communicates with the controller for implementing reverse thrust control through a data bus.