Movable micro turbojet engine test bed system

Abstract

The invention discloses a movable micro turbojet engine test bed system which comprises a test bed, a movable rack, a control cabinet and a remote controller. The test bed is composed of an engine suite, an execution mechanism and a sensor suite. The engine kit comprises a micro turbojet engine body, an engine electronic control unit and an emergency oil cut-off valve. The executing mechanism comprises a starting motor, a fuel pump, an igniter, an outlet oil valve, an inlet oil valve and an air inlet valve; the control cabinet is integrated in the movable rack, and an equipment power supply, a PLC, a data acquisition module, an industrial personal computer and interaction equipment are arranged in the control cabinet; and the remote controller is in communication connection with the engine electronic control unit through a remote control receiver. The miniature turbojet engine test bed, the control cabinet and the movable rack are integrated, teaching display of miniature turbojet engine test in a limited space site is facilitated, and the miniature turbojet engine test bed can also be applied to related performance tests of miniature turbojet engines.

Description

Technical Field

[0001] The present invention relates to a test bench system for a micro turbojet engine, specifically a movable test bench system for a micro turbojet engine, which is applicable to the field of aeroengine teaching. Background Art

[0002] Traditional aeroengine teaching mostly relies on two-dimensional structure drawings, half-section physical models and performance simulation software. Although it can partially display the engine structure, there are significant limitations:

[0003] Insufficient dynamic display: Static drawings and half-section models cannot restore the dynamic coordination process during engine operation (such as air flow changes and component linkages), making it difficult for students to establish a complete understanding from principles to actual operation; Although simulation software can simulate some parameters, it lacks real physical feedback and has deviations from actual working conditions.

[0004] Limited experimental conditions: Traditional test benches are huge in volume (>50m 2 ) and high in construction cost (over 2 million yuan per set). They require fixed-site deployment and are difficult to conduct experiments in ordinary laboratories or temporary venues. Such equipment is mostly concentrated in professional research institutions, with low popularity in colleges and universities, restricting students' practical opportunities.

[0005] Single functionality: Existing teaching tools are mainly for demonstration, unable to support innovative experiments such as parameter adjustment and fault simulation, and difficult to meet the needs of the deep integration of scientific research and teaching.

[0006] In recent years, the technology of micro turbojet engines has developed rapidly. Its small size and low cost provide a new direction for teaching experiments. At the same time, the maturity of sensor technology, embedded control systems and wireless communication technology makes high-precision data acquisition, remote control and real-time interaction possible. However, existing micro engine test systems mostly lack integrated design and still have problems such as decentralized control, inconvenient movement and insufficient data visualization. Therefore, there is an urgent need for a test bench system that integrates miniaturization, mobility and intelligence to solve the pain points of traditional teaching and promote the innovation of aeroengine education. Summary of the Invention

[0007] In order to solve the difficult problems existing in the teaching demonstration and innovative experiments of aeroengine principles, the present invention proposes a movable test bench system for a micro turbojet engine, which integrates the test bench of the micro turbojet engine, the control cabinet and the movable bench, facilitating the teaching display of the test run of the micro turbojet engine in a limited space, and can also be applied to relevant performance tests of the micro turbojet engine.

[0008] The object of the present invention is achieved through the following technical solutions, in combination with the attached drawings:

[0009] A mobile micro turbojet engine test bench system, comprising a test bench, a mobile stand 4, a control cabinet and a remote controller 11;

[0010] The test bench is installed on the mobile stand 4, and the test bench is composed of an engine kit 1, an actuator 3 and a sensor kit 2; the engine kit 1 includes a micro turbojet engine body, an engine electronic control unit and an emergency fuel cut-off valve; the actuator 3 includes a starting motor, a fuel pump, an igniter, an outlet oil valve, an inlet oil valve and an intake valve; the sensor kit 2 is used to collect the test state parameters of the micro turbojet engine;

[0011] The control cabinet is integrated in the mobile stand 4. An equipment power supply 5, a PLC 6, a data acquisition module 7, an industrial control computer 8 and an interaction device 9 are arranged in the control cabinet; the data acquisition module 7 is used to obtain the test state parameters collected by the sensor kit 2, convert the state parameters into digital signals and send them to the PLC 6, and the PLC 6 uploads the received test state parameter information to the industrial control computer 8; the industrial control computer 8 is respectively in communication control connection with the interaction device 9, the PLC 6 and the engine electronic control unit. The industrial control computer 8 generates control instructions for the actuator 3 according to the operation signals of the interaction device 9, and sends the control instructions to the PLC 6 and the engine electronic control unit correspondingly. The PLC generates control signals according to the received control instructions to control the starting motor, fuel pump and igniter of the actuator 3, and the engine electronic control unit controls the starting motor, fuel pump and igniter of the actuator 3; the interaction device 9 is installed on the control cabinet and is used for the user to perform starting and running operations of the micro turbojet engine test, and display the engine state parameters and fault states during the test process; the equipment power supply 5 is used to supply power to the PLC 6 and the sensor kit 2;

[0012] The remote controller 11 is in communication connection with the engine electronic control unit through a remote control receiver, and sends engine start / stop and acceleration / deceleration control instructions to the engine electronic control unit through the remote controller 11.

[0013] Further, the system further includes a mobile terminal device 10, and the mobile terminal device 10 is in wireless communication connection with the industrial control computer 8 and is used to record and display engine test data.

[0014] Further, the sensor kit 3 includes:

[0015] A temperature sensor, used to measure the combustion chamber outlet temperature and tailpipe temperature of the micro turbojet engine;

[0016] An air flow sensor, used to measure the air volume flow of the micro turbojet engine;

[0017] A fuel flow sensor for measuring the fuel volume flow rate of a micro turbojet engine;

[0018] A pressure sensor for measuring the compressor outlet pressure of a micro turbojet engine;

[0019] A thrust sensor for measuring the engine thrust of a micro turbojet engine;

[0020] A speed sensor; for measuring the engine speed of a micro turbojet engine;

[0021] The data collected by the temperature sensor, air flow sensor, fuel flow sensor, pressure sensor, and thrust sensor are directly sent to the data acquisition module, and then sent to the industrial control computer 8 after being processed by the PLC. The industrial control computer 8 displays the data through the touch screen of the interaction device 9; the data collected by the speed sensor is converted from a USB signal to a TTL signal and transmitted to the industrial control computer 8, and the industrial control computer 8 displays the data through the touch screen of the interaction device 9.

[0022] Further, the control signals of the starting motor and fuel pump of the actuator are driven by the engine electronic control unit using a timer to generate a PWM square wave, and the igniter is controlled by the general-purpose IO of the engine electronic control unit to output high and low levels; the outlet oil valve, inlet oil valve, and intake valve are controlled by the industrial control computer to generate control signals, and the general-purpose IO ports are respectively used to generate high and low levels through the PLC to control the on and off of each valve, and the status information of each valve is fed back to the industrial control computer through the PLC. The industrial control computer 8 displays the information through the touch screen of the interaction device 9.

[0023] Further, the interaction device includes a power switch, an industrial computer start button, an indicator warning light, a touch screen, a keyboard and mouse set, and a fuel filling button. The above components are integrated on the control countertop, and the user conducts the power-on of the test bench system and the engine fuel filling operation through the interaction device.

[0024] Further, the remote controller is provided with a start-stop switch, a throttle lever, and a throttle trim. The start-stop switch controls the start and stop of the engine, and the throttle lever and throttle trim control the acceleration and deceleration processes of the engine.

[0025] Further, the control method of the remote controller is as follows:

[0026] Push the throttle lever and throttle trim of the remote controller to the lowest position, and at this time, it corresponds to the standby state of the engine;

[0027] Push the throttle trim of the remote controller to the maximum, and at this time, it corresponds to the fuel supply amount in the engine idle state;

[0028] Push the throttle lever of the remote control to the maximum. At this time, the engine electronic control unit controls the starting motor, igniter, and fuel pump to work according to the starting sequence. After the engine starting process is completed, the engine will automatically trigger the engine electronic control unit to control the igniter and starting motor to stop working, and pull the throttle lever of the remote control back to the lowest position.

[0029] After starting, the micro turbojet engine enters the normal operation state: Push the throttle lever of the remote control upward to simulate the process of pushing the throttle to accelerate the engine. At this time, the action of the throttle lever of the remote control will generate an acceleration command, increasing the fuel supply of the engine and the engine speed. Pull the throttle lever of the remote control downward to simulate the process of pulling back the throttle to decelerate the engine. At this time, the action of the throttle lever of the remote control will generate a deceleration command, reducing the fuel supply of the engine and the engine speed.

[0030] During the starting or normal operation process, pull the throttle lever and throttle trim of the remote control to the lowest position. The remote control forms a stop command to control the fuel pump speed of the actuator to drop to zero, the starting motor not to work, and the igniter not to work, thereby shutting down the engine.

[0031] Furthermore, the control process of the movable micro turbojet engine test bench system includes:

[0032] S1. System power-on preparation:

[0033] Power on the system through the interactive device.

[0034] Power on the remote control.

[0035] Fuel tank fuel supply: The industrial control computer generates an execution instruction through the PLC to control the actuator to open the inlet oil valve, thereby opening the oil path between the main fuel tank and the buffer fuel tank of the engine, and opening the air intake valve to make the cavity of the main fuel tank communicate with the atmosphere.

[0036] Fuel tank refueling: The industrial control computer controls the fuel pump to start through the engine electronic control unit, so that the fuel in the main fuel tank is supplied to the buffer fuel tank through the fuel pump and the inlet oil valve. After the buffer fuel tank is filled with fuel, the fuel pump stops working, stops refueling the buffer fuel tank, and closes the inlet oil valve of the actuator to prevent oil return.

[0037] S2. Engine starting:

[0038] The remote control sends a control instruction to the engine electronic control unit. The engine electronic control unit controls the starting motor, igniter, and fuel pump to work according to the starting sequence. After a reading appears in the speed range, the engine starting process is completed, and the engine automatically triggers the electronic control unit to control the igniter and starting motor to stop working. If an abnormality occurs to the engine during the starting process, an alarm will be prompted through the interactive device. At the same time, it will trigger the engine electronic control unit to control the emergency fuel cut-off valve to cut off the fuel and stop starting.

[0039] S3. Engine acceleration and deceleration:

[0040] After startup is completed, the micro turbojet engine starts to enter the normal operation state. The process of simulating the engine's throttle acceleration or deceleration through the remote control: The actions of the remote control generate commands, which control the fuel pump's rotational speed to increase or decrease through the engine electronic control unit, causing the engine's fuel supply to increase or decrease, and the engine's rotational speed to increase or decrease.

[0041] S4. Engine shutdown:

[0042] During startup or the normal operation state, a shutdown command is generated through the actions of the remote control to control the fuel pump's rotational speed of the actuator to drop to zero, the starting motor to stop working, and the igniter to stop working, thereby shutting down the engine.

[0043] The present invention has the following beneficial effects:

[0044] 1. Significantly improved teaching intuitiveness: Key parameters such as temperature, pressure, rotational speed, and thrust are collected in real time through the sensor kit, and the interactive device is combined to dynamically display the data curve, intuitively showing the entire process of engine startup, acceleration, and deceleration, helping students understand the component cooperation mechanism and energy conversion principle. The remote control and mobile terminal support multi-mode operations (such as push rod acceleration, emergency stop and fuel cut-off), simulating the real flight control logic, and strengthening the combination of theory and practice.

[0045] 2. Outstanding cost and flexibility advantages: The miniaturized design (floor area <5m 2 ) combined with the movable bench supports rapid deployment in multiple scenarios such as classrooms, laboratories, and exhibition halls, breaking through the site restrictions. Using inexpensive industrial-grade components (such as PLCs, general sensors), the cost of a single set is reduced to less than 10% of that of traditional test stands, greatly improving the equipment coverage rate of colleges and universities.

[0046] 3. Function integration and support for innovative experiments: The industrial control computer and PLC cooperate to control, realizing the automated management of complex logics such as valve on-off, fuel pump speed regulation, and ignition timing, and supporting custom experimental processes (such as fault injection, performance limit testing). The mobile terminal wirelessly accesses the system, can remotely monitor data, record the experimental process, and generate a visual report, facilitating after-class analysis and scientific research applications.

[0047] 4. Enhanced safety and reliability: The emergency fuel cut-off valve is linked with the fault self-diagnosis module, which can automatically cut off the fuel supply in case of overheating, overspeed, or abnormal fuel supply, ensuring experimental safety. The buffer fuel tank and the dual-valve design (inlet oil valve, outlet oil valve) prevent fuel leakage and reduce the operation risk.

[0048] In summary, the present invention not only solves the problems of poor dynamics and high cost of traditional teaching tools, but also provides an efficient and safe platform for the practical teaching and scientific research innovation of aero-engines, with significant promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] FIG. Figure 1 is a schematic composition diagram of a mobile micro turbojet engine test bench system described in Embodiment 1 of the present invention;

[0050] FIG. Figure 2 is a fuel control principle block diagram of a mobile micro turbojet engine test bench system described in Embodiment 1 of the present invention;

[0051] In the figure:

[0052] 1 - engine kit; 2 - sensor kit; 3 - actuator; 4 - movable stand; 5 - equipment power supply; 6 - PLC; 7 - data acquisition module; 8 - industrial control computer; 9 - interaction device; 10 - mobile terminal device; 11 - remote controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0053] The technical solutions of the present invention are further introduced below in conjunction with the drawings and embodiments:

[0054] In the embodiments of the present invention, the micro turbojet engine is a miniaturized and small-sized device of a turbojet engine. Based on the basic principle of a turbojet engine, it includes the complete structure of a turbojet engine, and has the characteristics of low total cost, strong versatility, and simple use in research, design, manufacturing, and experiments. It is suitable for scientific research experiments and teaching such as aero-engine principles and control, can comprehensively measure or calculate the operating parameters of a micro turbojet engine, and provides conditions for conducting comprehensive experimental research on engine principle classes.

[0055] This embodiment is a mobile micro turbojet engine test bench system, as Figure 1 shown, including a test bench, a movable stand 4, a control cabinet, a mobile terminal device 10, and a remote controller 11;

[0056] The test bench is fixed on the upper fixing frame of the movable stand 4. The test bench is composed of an engine kit 1, an actuator 3, and a sensor kit 2; the engine kit 1 includes a micro turbojet engine body, an engine electronic control unit ECU, and an emergency fuel cut-off valve; the actuator 3 includes a starting motor, a fuel pump, an igniter, an outlet oil valve, an inlet oil valve, and an intake valve; the sensor kit 2 is used to collect the state parameters of the micro turbojet engine.

[0057] The control cabinet is integrated within the movable gantry 4. Inside the control cabinet, there are a device power supply 5, a PLC (Programmable Logic Controller) 6, a data acquisition module 7, an industrial control computer 8, and an interaction device 9. The data acquisition module 7 is used to obtain the state parameters of the micro turbojet engine collected by the sensor suite 2, process the obtained state parameters, convert them into digital signals, and then send them to the PLC 6. The PLC 6 uploads the received state parameter information of the micro turbojet engine to the industrial control computer 8. The industrial control computer 8 communicates and controls with the interaction device 9, the PLC 6, the mobile terminal device 10, and the engine electronic control unit respectively. The industrial control computer 8 generates control instructions for the actuator 3 according to the operation signals of the interaction device 9, and sends the corresponding control instructions to the PLC 6 and the engine electronic control unit respectively. The PLC generates control signals according to the received control instructions to control the starting motor, fuel pump, and igniter of the actuator 3. The engine electronic control unit controls the starting motor, fuel pump, and igniter of the actuator 3. The interaction device 9 is installed on the control cabinet and is used for users to perform starting and running operations of the micro turbojet engine test run, as well as display the engine state parameters and fault states during the test run. The device power supply 5 is used to provide 24V DC power supply to the PLC 6 and the sensor suite 2.

[0058] The mobile terminal device 10 is wirelessly connected to the industrial control computer 8 and is used to record and display the engine test run data.

[0059] The remote controller 11 is communicatively connected to the engine electronic control unit through a remote control receiver, and sends engine start, acceleration, and deceleration instructions to the engine electronic control unit through the remote controller 11.

[0060] Furthermore, the sensor suite 3 includes:

[0061] A temperature sensor for measuring the combustion chamber outlet temperature and the tailpipe temperature of the micro turbojet engine.

[0062] An air flow sensor for measuring the air volume flow of the micro turbojet engine.

[0063] A fuel flow sensor for measuring the fuel volume flow of the micro turbojet engine.

[0064] A pressure sensor for measuring the compressor outlet pressure of the micro turbojet engine.

[0065] A thrust sensor for measuring the engine thrust of the micro turbojet engine.

[0066] A rotational speed sensor for measuring the engine rotational speed of the micro turbojet engine.

[0067] The data collected by the temperature sensor, air flow sensor, fuel flow sensor, pressure sensor, and thrust sensor are directly sent to the data acquisition module, and then sent to the industrial control computer 8 after being processed by the PLC. The industrial control computer 8 displays the data through the touch display screen of the interaction device 9; the data collected by the speed sensor is converted from a USB signal to a TTL signal and transmitted to the industrial control computer 8, and the industrial control computer 8 displays the data through the touch display screen of the interaction device 9. The measurement ranges of each sensor are: temperature sensor (0 - 800 °C), thrust sensor (0 - 22 kgf), speed sensor (0 - 120,000 r / min), fuel flow meter (0 - 1000 g / min), pressure sensor (0.1 - 0.5 MPa).

[0068] Preferably, the actuators include a starting motor, a fuel pump, and an igniter, which are controlled by signals sent by a remote control through a remote control receiver and an engine electronic control unit. Among them, the control signals of the starting motor and the fuel pump are driven by the engine electronic control unit using a timer to generate a PWM square wave, and the igniter is controlled by the general-purpose IO of the engine electronic control unit to output high and low levels; the outlet oil valve, inlet oil valve, and intake valve are controlled by control signals generated by the industrial control computer. The PLC respectively generates high and low levels through the general-purpose IO port to control the on / off of each valve, and the status information of each valve is fed back to the industrial control computer through the PLC. The industrial control computer 8 displays the information through the touch display screen of the interaction device 9.

[0069] Preferably, the interaction device includes a power switch, an industrial computer start button, an indicator warning light, a touch display screen, a keyboard and mouse set, and a fuel filling button. The above components are integrated on the control console surface, and the user can perform operations such as powering on the entire test bench system and refueling the engine through the interaction device.

[0070] Preferably, the remote control is provided with a start / stop switch, a throttle lever, and a throttle trim. The start / stop switch controls the start and stop of the engine, and the throttle lever and throttle trim control the acceleration and deceleration processes of the engine.

[0071] Preferably, the movable test stand includes a test stand and a fixing frame fixed on the test stand; the engine kit, sensor kit, and actuator are integrated on the fixing frame, and the control cabinet is integrated on the test stand. Movable wheels are provided at the bottom of the test stand, and the entire system can be conveniently moved and transferred through the movable test stand.

[0072] Preferably, the mobile terminal device 10 includes a smart phone and / or a portable computer. The mobile terminal device 10 communicates wirelessly with the industrial control computer 8 to establish remote mobile operation, and can obtain the status parameters and environmental parameters of the micro turbojet engine, realizing the text display, bar chart display and dynamic curve display of the status parameters and environmental parameters. At the same time, with the help of the file system of the mobile terminal device 10, the data during the experiment is recorded in the form of a table file, which is convenient for the analysis and processing of the data after the experiment, thus improving the system usage efficiency. The intelligent mobile terminal software is developed based on HTML5 and adapts to the intelligent mobile terminal device through the use of an adapter.

[0073] The working principle of the present invention is introduced as follows:

[0074] The working process of the micro turbojet test bench system includes system power-on preparation, engine start, engine acceleration and deceleration, and engine shutdown. The specific operation for each stage is as follows:

[0075] 1. System power-on preparation

[0076] Step 1: After the system power plug is inserted into the triangular quick connector on the operation console, turn on the power switch in the interactive device to power on the entire system. At this time, the device power supplies 24V DC power to the PLC, air flow sensor, fuel flow sensor, pressure sensor and thrust sensor. Then press the start computer button to start the industrial control computer, and the industrial control computer obtains the engine speed measured by the speed sensor and directly displays it through the touch display screen. The industrial control computer collects the engine combustion chamber outlet temperature, tailpipe exhaust temperature, air flow, fuel flow, compressor outlet pressure, and engine thrust measured by the temperature sensor, air flow sensor, fuel flow sensor, pressure sensor and thrust sensor through the data acquisition module and PLC, and displays them through the touch display screen.

[0077] Step 2: Adjust the power-off / on knob of the remote controller to the on position to power on the remote controller.

[0078] Step 3: Perform the control operations of the inlet oil valve and the intake valve through the touch display screen. The industrial control computer obtains the operation instructions and generates control instructions, which generate execution instructions through the PLC to control the actuator 3 to open the inlet oil valve, thereby opening the oil path between the main fuel tank (large capacity) and the buffer fuel tank (small capacity), and opening the intake valve to make the cavity of the main fuel tank communicate with the atmosphere.

[0079] Step 4: Press the fuel filling button in the interactive device, and the industrial control computer controls the starting fuel pump through the ECU to supply the fuel from the main fuel tank (large capacity) to the buffer fuel tank through the fuel pump and the inlet oil valve.

[0080] Step 5: When observing that there are no bubbles in the buffer fuel tank of the micro turbojet engine, it indicates that the fuel tank is full. At this time, press the refueling button, and the fuel pump stops working, stopping the refueling of the buffer fuel tank; control the inlet oil valve and the intake valve through the touch display screen. At this time, the industrial control computer generates an execution instruction through the programmable logic controller (PLC) to close the inlet oil valve of the actuator to prevent oil return.

[0081] 2. Engine startup

[0082] Send an open instruction to the PLC through the industrial control computer to control the opening of the outlet oil valve of the actuator, and the oil path from the buffer fuel tank to the engine is opened.

[0083] Step 1: Pull the throttle lever and throttle trim of the remote control to the lowest position, and the status bar on the touch display screen shows [Standby].

[0084] Step 2: Push the throttle trim of the remote control to the maximum. At this time, the fuel supply amount corresponding to the idle speed state, and the status bar on the touch display screen shows [Ready to start].

[0085] Step 3: Push the throttle lever of the remote control to the maximum. At this time, the remote control sends a control signal to the remote control receiver, and the remote control receiver processes and converts the control instruction and sends it to the engine electronic control unit. The engine electronic control unit controls the starting motor, igniter, and fuel pump to work according to the starting sequence. After there is a reading in the speed area, it indicates that the engine combustion chamber is burning and the engine startup process is completed. The engine will automatically trigger the electronic control unit (ECU) to control the igniter and the starting motor to end their work, and pull the throttle lever of the remote control back to the lowest position. If the engine shows abnormalities during startup, the fault indicator light of the interaction device will alarm. At the same time, it will trigger the engine electronic control unit (ECU) to control the emergency fuel cut-off valve to cut off the fuel and stop the startup.

[0086] 3. Engine acceleration and deceleration

[0087] After startup is completed, the micro turbojet engine starts to enter the normal operation state. By pushing the throttle lever of the remote control upward, the process of pushing the throttle to accelerate the engine can be simulated. At this time, the movement of the throttle lever of the remote control will generate an acceleration instruction, which is controlled by the remote control receiver and the electronic control unit (ECU) to increase the speed of the fuel pump, increase the fuel supply amount of the engine, and increase the engine speed. By pulling the throttle lever of the remote control downward, the process of pulling the throttle to decelerate the engine can be simulated. At this time, the movement of the throttle lever of the remote control will generate a deceleration instruction, which is controlled by the remote control receiver and the electronic control unit (ECU) to reduce the speed of the fuel pump, reduce the fuel supply amount of the engine, and reduce the engine speed. At high speeds, the throttle lever should be quickly pulled to the lowest position.

[0088] 4. Engine shutdown

[0089] During startup or normal operation, pull the throttle lever and throttle trim of the remote control to the lowest position. The remote control will generate a stop command to control the fuel pump of the actuator to reduce the speed to zero, the starting motor will not work, and the igniter will not work, thus shutting down the engine. At this time, the cooling indicator light on the console will be on. After waiting for the cooling indicator light to go out, the system will automatically exit the cooling mode.

[0090] By accessing the system through an intelligent mobile terminal device, the status parameters of the system can be remotely operated and controlled for display.

Claims

1. A mobile micro turbojet engine test bench system, characterized in that It includes a test stand, a movable mount (4), a control cabinet, and a remote controller (11); The test stand is installed on the movable mount (4). The test stand consists of an engine kit (1), an actuator (3), and a sensor kit (2). The engine kit (1) includes a micro turbojet engine body, an engine electronic control unit, and an emergency fuel cut-off valve. The actuator (3) includes a starting motor, a fuel pump, an igniter, an outlet oil valve, an inlet oil valve, and an intake valve. The sensor kit (2) is used to collect the test run state parameters of the micro turbojet engine; The control cabinet is integrated inside the movable mount (4). Inside the control cabinet, there are a device power supply (5), a PLC (6), a data acquisition module (7), an industrial control computer (8), and an interaction device (9). The data acquisition module (7) is used to obtain the test run state parameters collected by the sensor kit (2), convert the state parameters into digital signals and send them to the PLC (6). The PLC (6) uploads the received test run state parameter information to the industrial control computer (8). The industrial control computer (8) is communicatively connected to the interaction device (9), the PLC (6), and the engine electronic control unit respectively. The industrial control computer (8) generates control instructions for the actuator (3) according to the operation signals of the interaction device (9), and sends the control instructions to the PLC (6) and the engine electronic control unit correspondingly. The PLC generates control signals according to the received control instructions to control the starting motor, fuel pump, and igniter of the actuator (3). The engine electronic control unit controls the starting motor, fuel pump, and igniter of the actuator (3). The interaction device (9) is installed on the control cabinet and is used for the user to start and operate the test run of the micro turbojet engine, and display the engine state parameters and fault states during the test run. The device power supply (5) is used to supply power to the PLC (6) and the sensor kit (2); The remote controller (11) is communicatively connected to the engine electronic control unit through a remote control receiver, and sends engine start / stop and acceleration / deceleration control instructions to the engine electronic control unit through the remote controller (11).

2. The test bench system for a movable micro turbojet engine according to claim 1, characterized in that, It also includes a mobile terminal device (10). The mobile terminal device (10) is wirelessly communicatively connected to the industrial control computer (8) and is used to record and display the engine test run data.

3. The test bench system for a movable micro turbojet engine according to claim 1, characterized in that, The sensor kit (2) includes: A temperature sensor, which is used to measure the combustion chamber outlet temperature and the tailpipe temperature of the micro turbojet engine; An air flow sensor, which is used to measure the air volume flow of the micro turbojet engine; A fuel flow sensor, which is used to measure the fuel volume flow of the micro turbojet engine; A pressure sensor, which is used to measure the compressor outlet pressure of the micro turbojet engine; A thrust sensor, which is used to measure the engine thrust of the micro turbojet engine; A rotational speed sensor, which is used to measure the engine rotational speed of the micro turbojet engine; The data collected by the temperature sensor, air flow sensor, fuel flow sensor, pressure sensor, and thrust sensor are directly sent to the data acquisition module, and then sent to the industrial control computer (8) after being processed by the PLC. The industrial control computer (8) displays the data through the touch display screen of the interaction device (9). The data collected by the speed sensor is converted from USB signal to TTL signal and transmitted to the industrial control computer (8), and the industrial control computer (8) displays the data through the touch display screen of the interaction device (9).

4. The test bench system for a movable micro turbojet engine according to claim 1, characterized in that, The control signals of the starting motor and fuel pump of the actuator are driven by the engine electronic control unit using a timer to generate a PWM square wave, and the igniter is controlled by the general-purpose IO of the engine electronic control unit to output high and low levels. The outlet oil valve, inlet oil valve, and intake valve generate control signals by the industrial control computer, and respectively generate high and low levels through the general-purpose IO ports of the PLC to control the on-off of each valve, and the status information of each valve is fed back to the industrial control computer through the PLC. The industrial control computer (8) displays the information through the touch display screen of the interaction device (9).

5. The test bench system of a movable micro turbojet engine according to claim 1, characterized in that, The interaction device includes a power switch, an industrial computer start button, an indication warning light, a touch display screen, a keyboard and mouse set, and a fuel filling button. The above components are integrated on the control countertop, and the user conducts the power-on of the test bench system and the engine fuel filling operation through the interaction device.

6. The mobile micro turbojet engine test bench system according to claim 1, characterized in that, The remote controller is provided with a start-stop switch, a throttle lever, and a throttle fine-tuning. The start-stop switch controls the start and stop of the engine, and the throttle lever and throttle fine-tuning control the acceleration and deceleration processes of the engine.

7. The test bench system for a movable micro turbojet engine according to claim 1, characterized in that, The control method of the remote controller is as follows: Pull the throttle lever and throttle fine-tuning of the remote controller to the lowest position, corresponding to the standby state of the engine at this time; Push the throttle fine-tuning of the remote controller to the maximum, corresponding to the fuel supply amount in the idle state of the engine at this time; Push the throttle lever of the remote controller to the maximum, and at this time the engine electronic control unit controls the starting motor, igniter, and fuel pump to work according to the starting timing; After the engine starting process is completed, the engine will automatically trigger the engine electronic control unit to control the igniter and starting motor to end the work, and pull the throttle lever of the remote controller back to the lowest position; After starting, the micro turbojet engine enters the normal operation state: push the throttle lever of the remote controller upward to simulate the process of pushing the throttle to accelerate the engine. At this time, the action of the throttle lever of the remote controller will generate an acceleration command, increasing the fuel supply amount of the engine and increasing the engine speed; pull the throttle lever of the remote controller downward to simulate the process of pulling the throttle to decelerate the engine. At this time, the action of the throttle lever of the remote controller will generate a deceleration command, reducing the fuel supply amount of the engine and reducing the engine speed; During the starting or normal operation state process, pull the throttle lever and throttle fine-tuning of the remote controller to the lowest position. The remote controller forms a stop command to control the fuel pump speed of the actuator to drop to zero, the starting motor does not work, and the igniter does not work, thereby shutting down the engine.

8. A mobile micro turbojet engine test bench system according to any one of claims 1 to 7, characterized in that, The control process of the movable micro turbojet engine test bench system includes: S1. System power-on preparation: Power on the system through the interaction device; Power on the remote controller; Fuel tank fuel supply: The industrial control computer generates execution instructions through the PLC to control the actuator to open the inlet oil valve, thereby opening the oil circuit between the engine main fuel tank and the buffer fuel tank, and opening the air inlet valve to make the cavity of the main fuel tank communicate with the atmosphere; Fuel tank refueling: The industrial control computer controls the fuel pump to start through the engine electronic control unit, so that the fuel in the main fuel tank is supplied to the buffer fuel tank through the fuel pump and the inlet oil valve; after the buffer fuel tank is full of fuel, the fuel pump stops working, stops refueling the buffer fuel tank, and closes the inlet oil valve of the actuator to prevent oil return; S2. Engine start: The remote controller sends a control instruction to the engine electronic control unit, and the engine electronic control unit controls the starter motor, igniter, and fuel pump to work according to the start timing sequence; after there is a reading in the speed range, the engine start process is completed, and the engine automatically triggers the electronic control unit to control the igniter and the starter motor to end the work; if the engine appears abnormal during the start process, it will alarm and prompt through the interaction device. At the same time, it will trigger the engine electronic control unit to control the emergency fuel cut-off valve to cut off the fuel and stop the start; S3. Engine acceleration and deceleration: After the start is completed, the micro turbojet engine starts to enter the normal operation state. The remote controller simulates the process of pushing the throttle to accelerate or pulling back the throttle to decelerate the engine: The action of the remote controller generates an instruction, and the engine electronic control unit controls the speed of the fuel pump to increase or decrease, so that the fuel supply of the engine increases or decreases, and the speed of the engine increases or decreases; S4. Engine shutdown: During the start or normal operation state, a shutdown instruction is generated through the action of the remote controller to control the speed of the fuel pump of the actuator to drop to zero, the starter motor does not work, and the igniter does not work, thereby shutting down the engine.

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