An aircraft engine electronic speed governor adjustment test equipment

Abstract

The present invention provides an adjustment and test device for an electronic speed governor of an aircraft engine, comprising: a power supply; a boost module, the boost module is used to boost the output voltage of the power supply; a voltage stabilizing module, the input end of the voltage stabilizing module is connected to the power supply; an MCU module, the MCU module is connected to the output end of the voltage stabilizing module; a digital control switch power supply module, the digital control switch power supply module receives an enable signal and a voltage regulation signal of the MCU module; a switch matrix module, the switch matrix module adjusts the direction of the output voltage according to the instruction of the MCU module and outputs it to the electronic speed governor of the aircraft engine; a display module, the voltage stabilizing module supplies power to the display module, the display module is used to display the signal of the MCU module; a wireless module, the voltage stabilizing module supplies power to the wireless module, and the MCU module receives control instructions through the wireless module. The present invention solves the problem of increased flight hazards caused by a stuck speed governor.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft engine control, and more particularly to an aircraft engine electronic speed governor adjustment and testing device. Background Art

[0002] The AE300 series engine is an aviation piston jet kerosene engine produced by Austro Engine. It adopts electronic high-pressure common rail technology, four-cylinder in-line compression ignition, economical and fuel-efficient, and has sufficient power. The operation and control of the entire engine are completed by EECU, and its propeller is driven by the gearbox connected to the engine. The rotation speed of the propeller is regulated by the electronic governor. The governor is an electronic governor with a DC motor integrated inside. The rotation of the DC motor (including forward and reverse rotation, controlled by EECU) will change the preload force of the flyweight spring inside the governor. The position of the governor oil distribution valve is changed by the change of the centrifugal force of the flyweight and the preload force of the flyweight spring, which affects the amount of lubricating oil input or returned by the governor to the propeller, changes the blade attack angle of the propeller, and finally changes the speed of the propeller. The speed governor has two screws for maximum and minimum adjustable speed, which are used to set the maximum and minimum speeds of the speed governor in "adjustable mode". However, when adjusting these two screws, the rocker arm connected to the speed governor motor must be away from the two adjustment screws, otherwise the speed governor motor will be tightened when the two screws are turned, which will eventually cause the speed governor motor to be blocked, and the propeller speed cannot be adjusted after the aircraft takes off. The actuation voltage regulation of the speed governor motor by the EECU can be adjusted within -28V to +28V with an amplitude of no more than %1 (0.28V) to meet the propeller speed regulation requirements under different conditions.

[0003] The speed regulator manufacturer has designed and manufactured an adjustment test tool that can adjust and indicate the speed regulator motor position. The tool has the following functions: 1. Indicate the speed regulator motor position (maximum adjustable speed position, minimum adjustable speed position, middle position). 2. Give the speed regulator motor a fixed actuation voltage of +18V or -18V to change the speed regulator motor position.

[0004] The shortcomings of this tool are: 1. It is unable to simulate the EECU to set the actuation voltage of the speed regulator from -28V to 28V with a step value of no more than 0.28V. It is unable to determine whether the motor can be actuated at a low voltage, and it is unable to determine the current performance of the motor inside the speed regulator. 2. It is unable to display the actuation current of the motor in real time. The actuation current of the motor indicates the response of the motor to a given voltage, directly reflects the performance of the motor, and is an important basis for whether the speed regulator motor is blocked and the prediction of the blocking. If a blocked speed regulator is installed on the engine, the propeller rotation speed cannot be adjusted, which seriously affects aviation safety. 3. It is unable to remotely adjust the position of the speed regulator motor to determine the speed regulation response of the propeller installed on the current engine to the engine power output. Because the propeller rotates after the engine is started, people cannot stand next to the engine. If you want to observe the response of the propeller to the engine torque by manually changing the position of the speed regulator motor, you must send the motor actuation command to the speed regulator tool through the wireless channel to change the position of the motor inside the speed regulator. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustment and testing device for an electronic speed governor of an aircraft engine.

[0006] The present invention aims to solve the problems existing in the prior art.

[0007] Compared with the prior art, the technical solution of the present invention and its beneficial effects are as follows:

[0008] An aircraft engine electronic speed governor adjustment and testing device comprises: a power supply; a boost module, the boost module is used to boost the output voltage of the power supply; a voltage stabilizing module, the input end of the voltage stabilizing module is connected to the power supply; an MCU module, the MCU module is connected to the output end of the voltage stabilizing module; a digital control switch power supply module, the digital control switch power supply module receives an enable signal and a voltage regulation signal of the MCU module; a switch matrix module, the switch matrix module adjusts the direction of the output voltage according to the instruction of the MCU module and outputs it to the aircraft engine electronic speed governor; a display module, the voltage stabilizing module supplies power to the display module, and the display module is used to display the signal of the MCU module; a wireless module, the voltage stabilizing module is the wireless module Power supply, the MCU module receives control instructions through the wireless module; current and voltage detection module, the MCU module detects the output result of the current and voltage detection module; wherein, when the interrupt program of the MCU module detects that the levels of the two outputs of the automatic return switch change and remain, the MCU module enables the digital control switch power supply module through instructions, and makes the output voltage of the digital control switch power supply module a fixed value, detects the output result of the current and voltage detection module, the voltage detected by the current and voltage detection module is the current control voltage of the electronic speed governor motor of the aircraft engine, and the detected current is the speed governor motor response current, and the MCU module should display the detected voltage and current information on the display module.

[0009] As a further improvement, it also includes a wireless terminal and an APP. The wireless terminal and the APP send remote control instructions to the MCU module through the wireless module in the remote working mode of the MCU module, and receive the status information of the aircraft engine electronic speed governor sent by the MCU module in the local mode or remote working mode of the MCU.

[0010] As a further improvement, the power supply is a DC portable power supply, the output voltage range of the power supply is 2 to 24V, and the maximum allowed output current is ≥3A.

[0011] As a further improvement, the boost module stably boosts the 2 to 24V voltage of the power input to a voltage above 28V.

[0012] As a further improvement, the digital control switch power supply module receives the enable signal and voltage regulation signal of the MCU module, wherein, assuming that the voltage output by the ADC submodule of the MCU module is B, when B=0, the basic value of the voltage output by the digital control switch power supply module in the enabled state is C, then the output voltage of the digital control switch power supply module is required to be D=K*B+C, wherein K is the voltage transfer coefficient, wherein, when B is at full bias, K*B(max)+C=28V, and C≤28*0.01V, assuming that the minimum resolution of B is E, then K*E≤28*0.01V is required, satisfying the simulation EECU outputting a speed regulator motor speed regulation signal of 1% to 100%, whether the digital control switch power supply module outputs is controlled by the MCU, when the digital control switch power supply module gives an enable instruction, the digital control switch power supply module outputs a voltage, otherwise the digital control switch power supply module outputs 0V.

[0013] As a further improvement, the switch matrix module adjusts the direction of the output voltage according to the instructions of the MCU module and outputs it to the aircraft engine electronic speed governor, including: the switch matrix module adjusts the direction of the output voltage according to the instructions of the MCU module, and outputs it to pins 3 and 4 of the aircraft engine electronic speed governor plug; when the MCU module gives a "forward" instruction, the positive pole of the voltage output by the digital control switch power supply module is connected to pin No. 3, and the negative pole of the output voltage is connected to pin No. 4; when the MCU module gives a "reverse" instruction, the negative pole of the voltage output by the digital control switch power supply module is connected to pin No. 3, and the positive pole of the output voltage is connected to pin No. 4; at the same time, it is required that the voltage output by the digital control switch power supply module has a voltage drop less than 0.01V after being processed by the switch matrix module.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides an aircraft engine electronic governor adjustment test device, which enables a local or remote simulated EECU to adjust the actuating voltage of the governor motor with a small step value to control the position of the motor inside the governor, and at the same time judge the governor jam by observing the current response of the motor inside the governor, thereby eliminating the hidden danger of the governor jamming and increasing the flight risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic diagram of an aircraft engine electronic speed governor adjustment and testing device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0019] Reference Figure 1 As shown, an aircraft engine electronic speed governor adjustment test device comprises: a power supply; a boost module, the boost module is used to boost the output voltage of the power supply; a voltage stabilizing module, the input end of the voltage stabilizing module is connected to the power supply; an MCU module, the MCU module is connected to the output end of the voltage stabilizing module; a digital control switch power supply module, the digital control switch power supply module receives an enable signal and a voltage regulation signal of the MCU module; a switch matrix module, the switch matrix module adjusts the direction of the output voltage according to the instruction of the MCU module and outputs it to the aircraft engine electronic speed governor; a display module, the voltage stabilizing module supplies power to the display module, and the display module is used to display the signal of the MCU module; a wireless module, the voltage stabilizing module is used to connect the wireless The module is powered, and the MCU module receives control instructions through the wireless module; the current and voltage detection module, the MCU module detects the output result of the current and voltage detection module; wherein, when the interrupt program of the MCU module detects that the levels of the two outputs of the automatic return switch change and remain, the MCU module enables the digital control switch power supply module through instructions, and makes the output voltage of the digital control switch power supply module a fixed value, and detects the output result of the current and voltage detection module, the voltage detected by the current and voltage detection module is the current control voltage of the electronic speed governor motor of the aircraft engine, and the detected current is the speed governor motor response current, and the MCU module should display the detected voltage and current information on the display module.

[0020] Module No. 1 is a power supply, which is a DC portable power supply with an output voltage range of 2 to 24V and a maximum allowable output current greater than or equal to 3A.

[0021] Module No. 2 is a boost module, which stably boosts the 2 to 24V voltage of the power input to a certain voltage A above 28V.

[0022] Module No. 3 is a digital control switch power supply module, which receives the enable signal and voltage regulation signal of the MCU module. Suppose the voltage output by the ADC submodule of the MCU is B. When B=0, the basic value of the voltage output by the digital control switch power supply module in the "enabled" state is C. The output voltage of the digital control switch power supply module is required to be D = K * B + C, where K is the voltage transfer coefficient, which is determined by the circuit structure of the digital control switch power supply module. It is required that when B is "full bias (reaching the maximum output value of the ADC submodule of the MCU)", K*B(max) + C = 28V, and C≤28*0.01V. Suppose the minimum resolution of B is E, then K * E≤28*0.01V is required. Only in this way can the analog EECU output 1% to 100% of the speed regulator motor speed regulation signal be satisfied. Whether the digital control switch power supply module outputs is controlled by the MCU. When the MCU gives an enable instruction, the digital control switch power supply module outputs voltage, otherwise the digital control switch power supply module outputs 0V.

[0023] Module 4 is a switch matrix module, which is required to "adjust the direction" of the output voltage according to the instructions of the MCU and output it to pins 3 and 4 of the electronic speed regulator plug. When the MCU gives a "forward" instruction, the positive pole of the voltage output by the CNC switch power supply module is connected to pin 3, and the negative pole of the output voltage is connected to pin 4. When the MCU gives a "reverse" instruction, the negative pole of the voltage output by the CNC switch power supply module is connected to pin 3, and the positive pole of the output voltage is connected to pin 4. At the same time, the voltage output by the CNC switch power supply module is required to have a voltage drop of less than 0.01V after passing through the switch matrix module. The switch matrix module is required to have an anti-short circuit setting, that is, when the switch is stuck, the output can be physically and effectively cut off to protect the front and back end circuits.

[0024] Module 5 is the electronic speed governor of the AE300 engine. The internal motor of the speed governor is connected between pins 3 and 4 of its plug. The speed governor motor "set speed position resistor R1" is connected between pins 5 and 6. When the speed governor set speed is at the minimum adjustable speed position (Min position), R1 is 123.1579 ohms. When the set speed is in the middle position (Mid position), R1 is 390 ohms. When the set speed is at the maximum adjustable speed position (Max position), R1 is 229.8947 ohms.

[0025] The output of the No. 6 voltage regulator module has a stable 3.3V voltage, which is supplied to R1 through a 1K voltage divider resistor. When the set speed of the speed regulator is at the minimum adjustable speed, the No. 10 MCU module detects that the voltage V1 of the No. 5 pin of the speed regulator should be 0.361856±0.1v, when the set speed of the speed regulator is at the maximum adjustable speed, V1 should be 0.616843±0.1v, when the set speed of the speed regulator is at the middle set speed, V1 should be 0.925899±0.1v, that is, the No. 10 MCU module can know the current set speed of the speed regulator motor by detecting the current voltage V1 of the No. 5 pin of the speed regulator.

[0026] The voltage regulator module No. 6 provides working voltage for the MCU module No. 10, the display module No. 7, and the wireless module No. 8 at the same time. The MCU module No. 10 should detect the voltage of the speed regulator's No. 5 pin in real time, and give the current set speed position (Max, Min or Mid position) of the speed regulator motor on the display module No. 7. If the voltage detected by the MCU does not meet the required voltage V1 of Min, Max, and Mid at the same time, a position detection warning should be given on the display module No. 7, and all operation instructions for the speed regulator motor should be prohibited. The MCU program should be set with an external interrupt detection program to detect the position of the mode switch and the automatic return switch. When the MCU detects that the level of the mode switch output changes from high to low, the MCU's working mode (remote control or local control) is switched internally. When the working mode is local control, the MCU internal program should be set to accept only local control.

[0027] When the MCU interrupt program detects that the level of the two outputs of the automatic return switch changes and remains, the MCU module enables the digital control switch power supply module through instructions, and sets the output voltage of the digital control switch power supply module to a fixed value V2, requiring 5v≤V2≤18v. At the same time, the No. 4 matrix switch module is controlled to make the closed state of the switch a high level of V2 input to the No. 3 pin of the speed regulator and a low level of V2 input to the No. 4 pin. At the same time, the output result of the current and voltage detection module is detected. The voltage detected by the current and voltage detection module is the current control voltage V of the speed regulator motor. tsq , the detected current is the speed regulator motor response current I tsq , MCU should set V tsq and I tsq Displayed on the display module.

[0028] When the MCU interrupt program detects that the second of the two output levels of the automatic return switch changes and remains, the MCU module enables the digital control switch power supply module through instructions, and sets the output voltage of the digital control switch power supply module to a fixed value V2, requiring 5v≤V2≤18v. At the same time, the matrix switch module is controlled to make the closed state of the switch a high level of V2 input to pin 4 of the speed regulator and a ground level of V2 input to pin 3. At the same time, the output result of the current and voltage detection module No. 11 is detected. The voltage detected by the current and voltage detection module is the current control voltage V of the speed regulator motor. tsq The detected current is the response current I of the speed regulator motor. tsq , MCU should set V tsq and I tsq Displayed on the display module.

[0029] When the interrupt program of the MCU detects that the automatic return switch returns to its original position, the MCU module should control the output voltage of the CNC switch power supply module to 0V.

[0030] The wireless module is the wireless communication module of the MCU. When the mode switch is in the remote working mode, the internal program of the MCU disables the automatic return switch and only allows the MCU to receive control instructions through the wireless channel. In the remote working mode of the MCU, the No. 9 wireless terminal and APP can send remote control instructions to the MCU through the wireless channel, and receive the status information of the speed regulator motor sent by the MCU in any mode of the MCU (local mode or remote working mode), including the current set speed position of the speed regulator Max, Min, Mid or unknown, and the current control voltage V of the speed regulator motor. tsq and the response current I of the speed regulator motor tsq The control instructions sent by wireless terminal No. 9 should basically include the forward command of the speed regulator motor (pin 3 of the speed regulator receives the high level of output voltage, and pin 4 receives the low level of output voltage), the reverse command (pin 4 of the speed regulator receives the high level of output voltage, and pin 3 receives the low level of output voltage), and the output voltage V3 of the No. 3 CNC power module. V3 can be set within 0V to 28V in steps of no more than 0.28V.

[0031] The wireless terminal APP should have the "speed regulator motor jam" detection function and should set at least three jam detection voltages V k1 、V k2 、V k3 And the corresponding speed regulator motor resistance response current I k1 ,I k2 ,I k3 (I k1 ,I k2 ,I k3The three currents are respectively controlled by more than 10 new speed regulators at V k1 、V k2 、V k3 The I k1 ,I k2 ,I k3 The average value of the three current data groups) requires the wireless terminal APP to manually input V k1 、V k2 、V k3 and I k1 ,I k2 ,I k3 , the wireless terminal APP should be in V k1 、V k2 、V k3 The speed regulator motor control voltage is used to detect the real-time response current I of the speed regulator motor. tsq Is it greater than or equal to I k1 ,I k2 ,I k3 If the speed regulator's I tsq All appear greater than or equal to I k1 ,I k2 ,I k3 If one or more of the following occurs, or if the speed regulator motor is under a control voltage of 28V for more than 1 minute and its current set speed position (Max, Min, Mid) does not change, the speed regulator motor is considered to be stuck.

[0032] The above embodiments are only used to explain the technical solutions of the present invention rather than to limit them. Those skilled in the art should understand that any modification and equivalent substitution that does not depart from the spirit and scope of the present invention should fall within the protection scope of the claims of the present invention.

Claims

1. An aircraft engine electronic governor adjustment test equipment, characterized in that: include: power supply; A boost module, the boost module is used to boost the output voltage of the power supply; A voltage stabilizing module, wherein an input end of the voltage stabilizing module is connected to the power supply; An MCU module, wherein the MCU module is connected to the output end of the voltage stabilizing module; A digital control switch power supply module, which receives an enable signal and a voltage regulation signal from the MCU module; A switch matrix module, which adjusts the direction of the output voltage according to the instruction of the MCU module and outputs it to the aircraft engine electronic speed governor; A display module, wherein the voltage stabilizing module supplies power to the display module, and the display module is used to display the signal of the MCU module; A wireless module, wherein the voltage stabilizing module supplies power to the wireless module, and the MCU module receives control instructions through the wireless module; A current and voltage detection module, wherein the MCU module detects an output result of the current and voltage detection module; Among them, when the interrupt program of the MCU module detects that the levels of the two outputs of the automatic return switch change and remain, the MCU module enables the digital control switch power supply module through instructions, and makes the output voltage of the digital control switch power supply module a fixed value, and detects the output result of the current and voltage detection module. The voltage detected by the current and voltage detection module is the current control voltage of the electronic speed governor motor of the aircraft engine, and the detected current is the speed governor motor response current. The MCU module should display the detected voltage and current information on the display module; The digital control switch power supply module receives the enable signal and voltage regulation signal of the MCU module, wherein, assuming that the voltage output by the ADC submodule of the MCU module is B, when B=0, the basic value of the voltage output by the digital control switch power supply module in the enabled state is C, then the output voltage of the digital control switch power supply module is required to be D=K*B+C, wherein K is the voltage transfer coefficient, wherein, when B is at full bias, K*B(max)+C=28V, and C≤28*0.01V, assuming that the minimum resolution of B is E, then K*E≤28*0.01V is required, satisfying the simulation EECU outputting the speed regulator motor speed regulation signal of 1% to 100%, whether the digital control switch power supply module outputs is controlled by the MCU, when the MCU module gives an enable instruction, the digital control switch power supply module outputs a voltage, otherwise the digital control switch power supply module outputs 0V.

2. The aircraft engine electronic governor adjustment and testing equipment according to claim 1, characterized in that: It also includes a wireless terminal and an APP, which send remote control instructions to the MCU module through the wireless module in the remote working mode of the MCU module, and receive status information of the aircraft engine electronic speed governor sent by the MCU module in the local mode or remote working mode of the MCU.

3. The aircraft engine electronic governor adjustment and testing equipment according to claim 1, characterized in that: The power supply is a DC portable power supply, the output voltage range of the power supply is 2 to 24V, and the maximum allowed output current is ≥3A.

4. The aircraft engine electronic governor adjustment and testing equipment according to claim 1, characterized in that: The boost module stably boosts the 2 to 24V voltage of the power input to a voltage above 28V.

5. The aircraft engine electronic governor adjustment and testing equipment according to claim 1, characterized in that: The switch matrix module adjusts the direction of the output voltage according to the instruction of the MCU module and outputs it to the aircraft engine electronic speed governor, including: the switch matrix module adjusts the direction of the output voltage according to the instruction of the MCU module, and outputs it to the No. 3 and No. 4 pins of the aircraft engine electronic speed governor plug; when the MCU module gives a "forward" instruction, the positive pole of the voltage output by the digital control switch power supply module is connected to the No. 3 pin, and the negative pole of the output voltage is connected to the No. 4 pin; when the MCU module gives a "reverse" instruction, the negative pole of the voltage output by the digital control switch power supply module is connected to the No. 3 pin, and the positive pole of the output voltage is connected to the No. 4 pin; at the same time, it is required that the voltage output by the digital control switch power supply module has a voltage drop less than 0.01V after being processed by the switch matrix module.

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