Multi-configuration system adaptive strategy method and software system

Abstract

The present invention discloses a multi-configuration system adaptive strategy method, comprising an identity pre-identification step and an identity authentication step, wherein the identity pre-identification step comprises: S11: acquiring feature points of a hard line state and a sensor fault state; S12: performing identity pre-identification according to the acquired feature points; the identity authentication step confirms the identity pre-identified in the identity pre-identification step, comprising the following steps: when the corresponding identity is not identified in S12, reading a historical identity and outputting it as a confirmation result; when the corresponding identity is identified in S12 as a single-system electronic injection controller, outputting it as a confirmation result; when the corresponding identity is identified in S12 as a dual-system electronic injection main controller or a dual-system electronic injection secondary controller, confirming whether both controllers in the complete system are correct through dual-system primary and secondary control interaction, if the control interaction fails, reading a historical identity and outputting it as a confirmation result, if the control interaction succeeds, outputting the identified identity as a confirmation result.

Description

Technical Field

[0001] The invention relates to the field of aerospace engineering, and in particular to a multi-configuration system adaptive strategy method and a software system for an aero-engine electronic fuel injection controller strategy. Background Art

[0002] Aero-engine is a highly complex and precise thermodynamic machine. As the heart of an aircraft, it is not only the power of the aircraft, but also an important driving force for the development of aviation. Every important change in the history of human aviation is closely related to the technological progress of aero-engines. The electronic fuel injection controller uses the electronic control unit (ECU) as the control center, and uses various sensors installed on the engine to measure various operating parameters of the engine, and then accurately controls the injection amount of the injector according to the control program pre-stored in the computer, so that the engine can obtain the best air-fuel ratio combustible mixture under various working conditions.

[0003] For example, Chinese patent document CN116220919A discloses an electronic fuel injection control method and device for an aviation piston two-stroke engine, which includes the following steps: working parameter processing and diagnosis: collecting and reading working parameters, and judging whether the sensor is faulty based on the rationality of the working parameters; working condition judgment, judging the engine working condition based on the collected working parameters; control strategy calculation and speed protection: determining the throttle control strategy, oil pressure control strategy, ignition control strategy, and fuel injection control strategy for the engine working condition and performing speed protection. The technical solution of the present invention can accurately adjust the fuel injection amount based on the real-time air-fuel ratio data feedback of the engine, and can effectively reduce fuel consumption on the basis of ensuring the output power of the engine.

[0004] In the prior art, the control strategy of the electronic controller can be adjusted according to different working conditions of the engine to reduce fuel consumption. However, since different types of engines require different states of the electronic fuel injection controller, and currently different types of engines still need to develop separate matching electronic fuel injection controllers, there are many problems such as long development cycle, high manpower and material costs, and high maintenance costs. Summary of the invention

[0005] In order to solve the technical problem in the prior art that different types of aircraft engines need to match different electronic fuel injection controllers, resulting in high research and development costs, the present invention provides a multi-configuration system adaptive strategy method, which includes an identity pre-identification step and an identity authentication step. The identity pre-identification step includes: S11: After the system is powered on, characteristic points of the hard line state and sensor fault state are obtained; S12: Pre-identify the identity according to the acquired hard line status and sensor fault status; The identity verification step confirms the identity pre-identified in the identity pre-identification step, and includes the following steps: When the corresponding identity is not recognized in S12, the historical identity is read from the memory and output as a confirmation result; When the corresponding identity is identified as a single-system EFI controller in S12, it is output as a confirmation result; When the corresponding identity is identified in S12 as the dual-system EFI main controller or the dual-system EFI secondary controller, the dual-system main and secondary control interaction is used to confirm whether both controllers in the complete system are correct. If the control interaction fails, the historical identity is read from the memory and output as the confirmation result. If the control interaction is successful, the identified identity is output as the confirmation result.

[0006] In this solution, different wiring harness states can be identified based on the characteristic points of the hard wire state and the sensor fault state, and then different EFI controllers can be matched with different wiring harness states for use, so as to automatically match different types of aircraft engines. Compared with the prior art, the same EFI controller platform in this solution can be matched with different types of aircraft engines, which increases the scope of application of the EFI controller platform, eliminates the step of developing an EFI controller for each different type of aircraft generator, and can also reduce R&D costs.

[0007] Preferably, the dual-system primary and secondary control interaction includes the following steps: after the EFI main controller completes pre-identification, it outputs PWM=X; After the EFI sub-controller completes pre-identification and receives the PWM input X, the EFI sub-controller completes identity recognition and outputs PWM=1-X; After the EFI main controller receives the PWM input 1-X, the EFI main controller completes the identity recognition. In this solution, the identity recognition of the primary and secondary EFI controllers in the dual system is completed by hard-wired PWM interaction, which can ensure the accuracy of the EFI controller identity recognition.

[0008] Preferably, the control interaction failure includes that the dual-system EFI secondary controller does not receive the PWM input X or the dual-system EFI main controller does not receive the PWM input 1-X. This solution can ensure the accuracy of the EFI controller identity recognition.

[0009] Preferably, when performing pre-identification of an identity, the corresponding identity is identified from a preset feature point table according to the hardwire state and the sensor failure state. This solution can ensure the accuracy of the identity pre-identification result.

[0010] Preferably, in the identity pre-identification step, the identity pre-identification is completed when the corresponding identity is identified and the hard line state and the sensor fault state remain unchanged for a certain period of time. This solution can ensure the accuracy of the identity pre-identification result.

[0011] Preferably, after the identity pre-identification step is completed, the identification result in this power-on cycle remains unchanged. Since the aircraft engine used in the same power-on cycle will not change, the identification result is kept unchanged after the identity pre-identification is completed in this solution, which can avoid the problem of repeated switching of the electronic fuel injection controller in the same power-on cycle causing the generator to not be used normally.

[0012] Preferably, in the identity pre-identification step, when the rotation speed exceeds a preset value at power-on, the historical identity is directly read from the memory, and in the identity verification step, the read historical identity is output as a confirmation result.

[0013] Preferably, in the identity pre-identification step, after the system is powered on, in a normal power-on state, and after the power-on time exceeds a preset system identification delay time, S11 is executed.

[0014] Preferably, in the identity pre-identification step, after the system is powered on, if the conditions that the rotation speed exceeds the preset value at power-on, the normal power-on state and the power-on time exceeds the preset system identification maximum confirmation time are not met, the historical identity is directly read from the memory, and the read historical identity is output as the confirmation result in the identity authentication step, and the identity recognition error status is output.

[0015] In a second aspect, the present invention provides a software system of a multi-configuration system adaptive strategy, including an identity pre-identification module, a memory and an identity confirmation module, and adopts the multi-configuration system adaptive strategy method to perform identity pre-identification and identity verification.

[0016] The present invention has the following beneficial effects: The present invention can use the same set of electronic fuel injection controller platform, identify different wiring harness states according to the characteristic points of the hard line state and the sensor fault state, and then match different electronic fuel injection controllers for use in accordance with the different wiring harness states, so as to automatically match different types of aircraft engines, thereby improving the application scope of the electronic fuel injection controller platform, eliminating the step of separately developing an electronic fuel injection controller for each different type of aircraft generator, and reducing research and development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a flowchart of a multi-configuration system adaptive strategy method and an identification method in a software system embodiment. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods: 1. Definition Configuration: Configuration means "configure", "set", "setting", etc. It means that users can complete the software functions they need through a simple method similar to "building blocks" without writing computer programs, which is the so-called "configuration".

[0019] Wiring harness: The overall set of equipment that provides services to a certain group of load sources, such as relay lines, switching devices, control systems, etc.

[0020] PWM: refers to pulse width modulation, which in the present invention refers to system hardware pulse width modulation.

[0021] EEPROM: refers to electrically erasable programmable read-only memory. It is a storage chip that does not lose data after power failure.

[0022] Idle speed: Engine idle speed is one of the engine operating conditions, which means that the engine is running without load and only needs to overcome the friction resistance of its internal parts without outputting power. The minimum speed to keep the engine running stably is called idle speed, which is one of the five basic operating conditions of the engine.

[0023] Historical identity: refers to the identity stored after the last successful system identification.

[0024] 2. The embodiment is basically as shown in the attached Figure 1 As shown: A multi-configuration system adaptive strategy method includes an identity pre-identification step and an identity authentication step. The identity pre-identification step includes: S11: After the system is powered on, characteristic points of the hard-wire state and sensor fault state are obtained; after the system is powered on, it is divided into three situations according to the power-on situation, a. the speed exceeds the preset value when powering on; b. normal power-on; c. the two situations a and b are not satisfied and the power-on time exceeds the preset system identification maximum confirmation time; the preset value refers to the non-idle calibration value, specifically the speed required for idling to enter non-idle, which is a calibration amount of a custom value; the system identification maximum confirmation time is a custom parameter value, which is customized according to the delay of power-on initialization / diagnosis / CAN communication, etc.

[0025] S12: Pre-identify the identity according to the acquired hardwire status and sensor fault status. Specifically, identify the corresponding identity from the preset feature point table according to the hardwire status and sensor fault status. When the corresponding identity is identified and the hardwire status and sensor fault status remain unchanged for a certain period of time, the identity pre-identification is completed. After the identity pre-identification step is completed, the identification result in this power-on cycle remains unchanged. The feature point table is shown in Table 1.

[0026] Table 1 Feature point table In Table 1, ECU_Single represents a single-system EFI controller, ECU_A represents a dual-system EFI main controller, and ECU_B represents a dual-system EFI sub-controller. In other embodiments, ECU_A may also represent a dual-system EFI sub-controller, and ECU_B represents a dual-system EFI main controller. "1" represents a state without fault, and "0" represents a state device fault. For a dual system, since the exhaust temperature channel is not judged, "0" in the dual system is a fill position and has no practical meaning.

[0027] In S12, according to the three power-on conditions, the identities identified in the identity identification step include the following three: a. When the speed exceeds the preset value at power-on, the historical identity is directly read from the memory; b. In a normal power-on state, and after the power-on time exceeds the preset system identification delay time, execute S11; c. If conditions a and b are not met and the power-on time exceeds the preset maximum confirmation time of system identification, the historical identity is directly read from the memory and the identity identification error state is output. The memory refers to EEPROM.

[0028] In the above identity pre-identification process, there are four results of pre-identification: identification as unidentified, identification as a dual-system EFI main controller, identification as a dual-system EFI secondary controller, and identification as a single-system EFI controller.

[0029] The identity verification step confirms the identity pre-identified in the identity pre-identification step, and includes the following steps: When the corresponding identity is not recognized in S12, the historical identity is read from the memory and output as a confirmation result; When the corresponding identity is identified as a single-system EFI controller in S12, it is output as a confirmation result; When the corresponding identity is identified in S12 as the dual-system EFI main controller or the dual-system EFI sub-controller, the dual-system main and sub-control interactions are used to confirm whether both controllers in the complete system are correct. If the control interaction fails, that is, the dual-system EFI sub-controller does not receive the PWM input X or the dual-system EFI main controller does not receive the PWM input 1-X, the historical identity is read from the memory and output as a confirmation result. If the control interaction is successful, the identified identity is output as a confirmation result.

[0030] Specifically, the dual-system primary and secondary control interaction includes the following steps: after the EFI main controller completes pre-identification, it outputs PWM=X; After the EFI sub-controller completes pre-identification and receives the PWM input X, the EFI sub-controller completes identity recognition and outputs PWM=1-X; After the EFI main controller receives the PWM input 1-X, the EFI main controller completes the identity recognition. In this embodiment, X=25%.

[0031] Based on the above multi-configuration system adaptive strategy method, this embodiment also discloses a multi-configuration system adaptive strategy software system, including an identity pre-identification module, a memory and an identity confirmation module, and uses the above multi-configuration system adaptive strategy method to perform identity pre-identification and identity authentication.

[0032] The specific implementation process is as follows: When in use, the system is powered on, and according to the power-on situation, it is divided into three situations: a. When the speed exceeds the preset value at power-on, that is, when it is not the idle calibration value, the historical identity is directly read from the memory and output as the final determined identity; b. In the normal power-on state, the judgment starts after the power-on time exceeds the preset system identification delay time. If the sensor connections are normal, the dual system will exchange identities through PWM hard line after self-identification, and output the final confirmed identity after the interaction confirmation is completed.

[0033] The determination process of identity pre-identification is as follows: obtain the feature points of the hard-line state and the sensor fault state, identify the corresponding identity from the preset feature point table according to the hard-line state and the sensor fault state, and complete the identity pre-identification when the corresponding identity is identified and the hard-line state and the sensor fault state remain unchanged for a certain period of time.

[0034] c. If neither of the above two conditions is met and the power-on time exceeds the maximum confirmation time of system identification, the historical identity is directly read from the memory and output as the final confirmed identity. In this state, the identity identification error state will be output: System_stSysCnfmFailed (system identification failure).

[0035] According to the result of identity pre-identification, the identity verification steps are as follows: If the pre-identification result is a single-system EFI controller, the system identification is completed and output as a confirmation result; If the pre-identification result is a dual-system EFI controller, it is necessary to confirm whether the two controllers in the complete system are correct through the dual-system primary and secondary control interaction, that is, through hard-line PWM interaction, first confirm the identity of the EFI secondary controller, and after the identity of the EFI secondary controller is confirmed; confirm the identity of the EFI main controller in the next cycle; the identity confirmation will be completed only after the identities of the EFI main and secondary controllers are confirmed, and the confirmation result will be output.

[0036] The specific steps are as follows: ①After the EFI main controller completes pre-identification, it outputs PWM=25%; ②After the EFI sub-controller completes pre-identification and receives 25% of the PWM input, it completes identity recognition and outputs PWM=75%; ③ After the EFI main controller receives 75% of the PWM input, the EFI main controller completes identity recognition.

[0037] In the above process, if the dual-system primary and secondary control interaction fails, that is, the EFI secondary controller does not receive 25% of the PWM input or the EFI main controller does not receive 75% of the PWM input, the historical identity is directly read from the memory.

[0038] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A multi-configuration system adaptive strategy method, characterized by: The method comprises an identity pre-identification step and an identity authentication step, wherein the identity pre-identification step comprises: S11: After the system is powered on, characteristic points of the hard line state and sensor fault state are obtained; S12: Pre-identify the identity according to the acquired hard line status and sensor fault status; The identity verification step confirms the identity pre-identified in the identity pre-identification step, and includes the following steps: When the corresponding identity is not recognized in S12, the historical identity is read from the memory and output as a confirmation result; When the corresponding identity is identified as a single-system EFI controller in S12, it is output as a confirmation result; When the corresponding identity is identified in S12 as the dual-system EFI main controller or the dual-system EFI secondary controller, the dual-system main and secondary control interaction is used to confirm whether both controllers in the complete system are correct. If the control interaction fails, the historical identity is read from the memory and output as the confirmation result. If the control interaction is successful, the identified identity is output as the confirmation result.

2. The multi-configuration system adaptive strategy method according to claim 1, characterized in that: The dual-system primary and secondary control interaction includes the following steps: after the EFI main controller completes pre-identification, it outputs PWM=X; After the EFI sub-controller completes pre-identification and receives the PWM input X, the EFI sub-controller completes identity recognition and outputs PWM=1-X; After the EFI main controller receives the PWM input 1-X, the EFI main controller completes the identity recognition.

3. The multi-configuration system adaptive strategy method according to claim 2, characterized in that: The control interaction failure includes that the dual-system EFI secondary controller does not receive the PWM input X or the dual-system EFI main controller does not receive the PWM input 1-X.

4. The multi-configuration system adaptive strategy method according to any one of claims 1 to 3, characterized in that: When performing pre-identification of an identity, the corresponding identity is identified from a preset feature point table according to the hard line state and the sensor fault state.

5. The multi-configuration system adaptive strategy method according to claim 4, characterized in that: In the identity pre-identification step, the identity pre-identification is completed when the corresponding identity is identified and the hard line state and the sensor fault state remain unchanged for a certain period of time.

6. The multi-configuration system adaptive strategy method according to claim 5, characterized in that: After the identity pre-identification step is completed, the identification result in this power-on cycle remains unchanged.

7. The multi-configuration system adaptive strategy method according to claim 6, characterized in that: In the identity pre-identification step, when the rotation speed exceeds a preset value when powered on, the historical identity is directly read from the memory, and in the identity verification step, the read historical identity is output as a confirmation result.

8. The multi-configuration system adaptive strategy method according to claim 7, characterized in that: In the identity pre-identification step, after the system is powered on, in a normal power-on state, and after the power-on time exceeds a preset system identification delay time, S11 is executed.

9. The multi-configuration system adaptive strategy method according to claim 8, characterized in that: In the identity pre-identification step, after the system is powered on, if the conditions of the rotation speed exceeding the preset value at power-on, the normal power-on state and the power-on time exceeding the preset system identification maximum confirmation time are not met, the historical identity is directly read from the memory, and the read historical identity is output as the confirmation result in the identity authentication step, and the identity recognition error state is output.

10. A software system for multi-configuration system adaptive strategy, characterized by: The system comprises an identity pre-identification module, a memory and an identity confirmation module, and adopts the multi-configuration system adaptive strategy method as described in any one of claims 1 to 9 to perform identity pre-identification and identity verification.

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