Liquid carrier rocket storage tank liquid level fault simulation device and method

Abstract

The invention relates to a liquid carrier rocket storage tank liquid level fault simulation device and method. The device comprises a touch display unit, a central processing unit, a signal generation unit and a power conversion unit, wherein the touch display unit is used for displaying an application program interface and setting a fault mode; the central processing unit is used for generating a corresponding control instruction according to the fault mode and sending the control instruction to the signal generation unit; the signal generation unit is used for outputting takeoff signals, separation signals and storage box point liquid level sensor signals with different time sequence requirements according to the control instruction; and the power supply conversion unit is used for converting primary power supply voltage input from the outside into secondary working voltage of the touch display unit, the central processing unit and the signal generation unit. Therefore, various fault working conditions of the liquid level of the liquid carrier rocket storage tank can be fully simulated, the coverage test of the reliability and robustness of the valve controller of the propellant utilization system is realized, and the performance of the propellant utilization system is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of liquid carrier rocket propellant utilization, and in particular to a liquid carrier rocket tank liquid level failure simulation device and method. Background Art

[0002] The valve controller is a key component of the liquid launch vehicle propellant utilization system. By collecting signals from the fuel and oxidizer tank level sensors, using the launch vehicle's takeoff and separation signals as reference points, it calculates the remaining amount of each propellant. This controls and adjusts the valve opening and the propellant mixing ratio, thereby maximizing propellant utilization efficiency and enhancing the rocket's carrying capacity. When testing the valve controller, a level simulator is required to simulate the fuel and oxidizer tank level sensor signals.

[0003] Traditionally, liquid level simulators simulate theoretical liquid level signals based on the characteristics of each mission. However, during rocket flight, actual liquid level signals can deviate from theoretical values and even cause various failures. Traditional testing fails to cover various abnormal operating conditions, resulting in insufficient reliability and robustness of valve controllers, suboptimal valve adjustment, and even premature fuel or oxidizer depletion, leading to mission failure. Summary of the Invention

[0004] Based on this, it is necessary to provide a liquid carrier rocket tank liquid level failure simulation device and method that can simulate various liquid level failure conditions, comprehensively cover the test of various abnormal conditions of valve controllers, and improve the reliability and robustness of valve controller design to address the above technical problems.

[0005] In a first aspect, the present application provides a liquid launch vehicle tank level fault simulation device, the device comprising: a touch display unit, a central processing unit, a signal generating unit, and a power conversion unit, wherein:

[0006] The touch display unit is used to display an application program interface and set a fault mode based on the application program interface;

[0007] The central processing unit is configured to generate a corresponding control instruction according to a fault mode set by the touch display unit, and send the control instruction to the signal generating unit;

[0008] The signal generating unit is configured to output a takeoff signal, a separation signal, and a tank point liquid level sensor signal with different timing requirements according to the control instruction; wherein the takeoff signal, the separation signal, and the tank point liquid level sensor signal are used to simulate various fault conditions;

[0009] The power conversion unit is used to convert an externally input primary power voltage into a secondary operating voltage for the touch display unit, the central processing unit, and the signal generating unit.

[0010] In one embodiment, the failure mode includes at least one of a takeoff failure, a separation failure, a tank point liquid level sensor short circuit failure, a tank point liquid level sensor open circuit failure, and a liquid level sloshing failure.

[0011] In one embodiment, the touch display unit includes a touch screen.

[0012] In one embodiment, the touch display unit is specifically used to:

[0013] On the application interface, various fault modes are represented by setting the timing parameters of each signal, and after completing the setting of the fault mode, a waveform preview of the signal is generated; wherein the timing parameters include: signal delay parameters and signal jitter parameters.

[0014] In one embodiment, the main control chip used by the central processing unit includes: an embedded microprocessor; the embedded microprocessor loads an embedded operating system, a driver, and an application from an external memory;

[0015] The central processing unit is specifically used to: load the timing parameters set by the touch display unit from the external memory, convert the timing parameters into a control instruction format that can be recognized by the signal generating unit, and write them into the signal generating unit according to a preset communication method.

[0016] In one embodiment, the central processing unit is further used to read back the control instructions received by the signal generating unit according to a preset communication method, and compare the read-back control instructions with the control instructions written into the signal generating unit to obtain a comparison result; and display the comparison result on the application interface.

[0017] In one embodiment, the signal generating unit includes: a programmable logic device and an interface chip;

[0018] The programmable logic device is used to output a takeoff signal, a separation signal, and a tank point liquid level sensor signal according to the control instructions of the central processing unit;

[0019] The interface chip is used to convert the takeoff signal, the separation signal, and the tank point liquid level sensor signal into different levels and output them from the output interface;

[0020] The programmable logic device is further used to recover the level after the output interface level conversion to obtain the recovered amount.

[0021] In one embodiment, the central processing unit is further configured to read the recovery volume according to a preset communication method, and to display the recovery volume in real time on the application interface of the touch display unit in the form of a recovery waveform.

[0022] In a second aspect, the present application further provides a method for simulating a liquid level failure in a liquid carrier rocket tank, which is applied to the liquid level failure simulation device for a liquid carrier rocket tank as described in any one of the first aspects, and the method comprises:

[0023] displaying an application program interface and setting a fault mode based on the application program interface;

[0024] Generate corresponding control instructions according to the set fault mode;

[0025] outputting a takeoff signal, a separation signal, and a tank point liquid level sensor signal with different timing requirements according to the control instruction; wherein the takeoff signal, the separation signal, and the tank point liquid level sensor signal are used to simulate various fault conditions;

[0026] Converts the external input primary power supply voltage into the internal secondary operating voltage.

[0027] The above-mentioned liquid-propellant launch vehicle tank level fault simulation device and method displays an application program interface and sets a fault mode based on the application program interface; generates corresponding control instructions based on the set fault mode; and outputs takeoff signals, separation signals, and tank point level sensor signals with different timing requirements based on the control instructions. The takeoff signals, separation signals, and tank point level sensor signals are used to simulate various fault conditions; and the external input primary power supply voltage is converted into an internal secondary operating voltage. This fully simulates various fault conditions of the liquid level in a liquid-propellant launch vehicle tank, achieving comprehensive reliability and robustness testing of the valve controller of the propellant utilization system, effectively improving the performance of the propellant utilization system. Furthermore, the device of the present application features a user-friendly human-machine interface, a compact size, and low power consumption. It can be flexibly applied to a variety of scenarios, such as single-unit valve controller testing, propellant utilization system testing, and overall rocket range testing, thus having a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 Schematic diagram of the structure of a liquid carrier rocket tank liquid level failure simulation device according to one embodiment;

[0030] Figure 2 FIG. 1 is a schematic diagram of an output signal waveform in an embodiment. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] For example, Figure 1 As shown, a structural schematic diagram of a liquid carrier rocket tank level fault simulation device is provided. The device may include: a touch display unit, a central processing unit, a signal generating unit, and a power conversion unit, wherein: the touch display unit is used to display an application interface and set a fault mode based on the application interface; the central processing unit is used to generate corresponding control instructions according to the fault mode set by the touch display unit, and send the control instructions to the signal generating unit; the signal generating unit is used to output a takeoff signal, a separation signal, and a tank point liquid level sensor signal with different timing requirements according to the control instructions; wherein the takeoff signal, the separation signal, and the tank point liquid level sensor signal are used to simulate various fault conditions; the power conversion unit is used to convert an externally input primary power supply voltage into a secondary operating voltage for the touch display unit, the central processing unit, and the signal generating unit.

[0033] In this embodiment, the touch display unit includes a touch screen, and the fault mode is set in the application interface by touch. The fault mode includes one or a combination of the following: takeoff failure, separation failure, tank point liquid level sensor short circuit failure, tank point liquid level sensor open circuit failure, and liquid level shaking failure.

[0034] Optionally, the takeoff failure refers to an abnormal takeoff signal. The takeoff signal is a high-level hold signal issued by the launch vehicle control system at the launch moment of the launch vehicle. This signal serves as a parameter for the valve controller's liquid level control algorithm. Takeoff failures include: the takeoff signal is never issued, the takeoff signal is issued prematurely, the takeoff signal is issued with a delay, or the takeoff signal is disturbed and jittered.

[0035] Optionally, the separation failure refers to an abnormal separation signal. The separation signal is a high-level hold signal issued by the launch vehicle control system during separation of the first and second stages of the launch vehicle. This signal serves as a parameter for the valve controller's liquid level control algorithm. Separation failures include: the separation signal is never issued, the separation signal is issued prematurely, the separation signal is issued with a delay, or the separation signal is disturbed and jittered.

[0036] In an optional embodiment, the takeoff signal and the separation signal can be delayed relative to the start time of the test process to simulate the failure of the takeoff signal and the separation signal to be sent out at all, sent in advance, or sent out with a delay. The delay setting range is 0 to 6000, in seconds, with an accuracy of 1ms; when the setting value is -1, it means that there is no output during the test. For example, the takeoff signal and the separation signal are set in the "Takeoff Signal" and "Separation Signal" input boxes of the application interface. Among them, the takeoff signal and the separation signal are delayed relative to the start time of the test process to simulate the failure of the takeoff signal and the separation signal to be sent out at all, sent in advance, or sent out with a delay.

[0037] In another optional embodiment, the interference jitter of the takeoff signal and separation signal is achieved by setting the number of jitters, the jitter interval duration, and the high-level pulse duration; the number of jitters represents the number of times the signal outputs a high-level pulse, and the setting range is 0 to 30; the jitter interval duration represents the length of the low level between two high-level pulses, and each jitter interval can be set individually, with a setting range of 0 to 6000, in seconds, and an accuracy of 1ms; the jitter length represents the length of each high-level pulse, and each jitter length can be set individually, with a setting range of 0 to 6000, in seconds, and an accuracy of 1ms. When the setting value is -1, it represents maintaining a high-level state. For example, enter the number of high-level pulses output by the signal in the "Jitter Number" input box; enter the length of the low level between every two high-level pulses in the "Jitter Interval" input box, and separate each data with a ","; enter the length of each high-level pulse in the "Jitter Length" input box, and separate each data with a ",".

[0038] For example, assuming that the output signals of 20 point level sensors in the fuel tank and 20 point level sensors in the oxidizer tank are used as parameters of the valve controller level control algorithm, before takeoff, all point level sensors in the fuel tank and oxidizer tank are immersed in the propellant. As the propellant is consumed, each point level sensor will be exposed to the propellant surface in turn; during normal operation, the point level sensor outputs a low-level signal when immersed in the propellant and outputs a high-level signal when exposed to the propellant; a point level sensor short-circuit fault means that the point level sensor is immersed in the propellant but outputs a high-level signal; a point level sensor open-circuit fault means that the point level sensor is exposed to the propellant and outputs a low-level signal. For example, the 40-point liquid level sensor input box on the application interface corresponds to 20 point liquid level sensors in the fuel tank and 20 point liquid level sensors in the oxidizer tank. The input box simulates short-circuit and open-circuit faults of the point liquid level sensors by setting the delay of the high-level signal relative to the start time of the test process. The input range is 0 to 6000, the unit is second, and the accuracy is 1ms. When the setting value is -1, it means that the high-level signal of the point liquid level sensor will not be output during the test.

[0039] Optionally, the liquid level sloshing fault refers to the vibration of the fuel tank and oxidizer tank during flight, which causes the propellant surface to slosh, resulting in jitter in the output signal of the point liquid level sensor. If the valve controller's liquid level control algorithm is improperly designed and fails to identify the liquid level sloshing fault, valve regulation can be seriously affected. This can be achieved by setting the number of jitters, jitter interval duration, and high-level pulse duration of the point liquid level sensor output signal. The number of jitters represents the number of high-level pulses output by a point liquid level sensor and has a setting range of 0 to 30. The jitter interval duration represents the length of the low-level pulse between two high-level pulses. Each jitter interval can be set individually, with a setting range of 0 to 6000, in seconds, and with a precision of 1ms. The jitter length represents the length of each high-level pulse and can be set individually, with a setting range of 0 to 6000, in seconds, and with a precision of 1ms. A setting of -1 indicates a high-level state. For example, in the application interface, set the level sloshing parameters for 40 level sensors. Each level sensor contains three parameter input boxes. The "Number of sloshing" input box represents the number of high-level pulses output by the level sensor at that point; the "Sloshing Interval" input box represents the length of the low-level pulse between two high-level pulses, with each data value separated by a ","; and the "Sloshing Length" input box represents the length of each high-level pulse during the sloshing, with each data value separated by a ",."

[0040] Exemplarily, the touch display unit is specifically used to: on the application interface, represent various fault modes by setting the timing parameters of each signal, and generate a waveform preview of the signal after completing the setting of the fault mode; wherein the timing parameters include: signal delay parameters and signal jitter parameters. For example, enter "10.005" in the "Takeoff Signal" input box, enter "3" in the "Number of Jitters" input box of the takeoff signal, enter "0.01, 0.02" in the "Jitter Interval" input box, and enter "0.01, 0.02, -1" in the "Jitter Length" input box, then the takeoff signal output waveform is as follows: Figure 2 shown.

[0041] Optionally, the application interface includes a "Preview Waveform" button. After the timing parameters of each signal are set, press this button and the application interface will generate a waveform preview of the signal to check whether the settings are correct.

[0042] Optionally, the application interface includes a "Start Test" button. Pressing the button starts the test process and displays the test process timer on the application interface. Pressing the button ends the test process. The application interface displays the timer in the format of "hh:mm:ss" to show the elapsed time from the start of the test process.

[0043] Optionally, the application interface further includes a "Save Parameters" button and a "Load Parameters" button. For example, when the "Save Parameters" button is pressed, a save and edit interface pops up. After editing the file name, the central processing unit stores the currently set signal parameters in the form of a file at a default address. When the "Load Parameters" button is pressed, a file selection interface pops up. After selecting a file, the central processing unit loads the parameters from the selected file, and the timing parameters on the application interface are automatically set.

[0044] Exemplarily, the main control chip used by the central processing unit includes: an embedded microprocessor; the embedded microprocessor is loaded with an embedded operating system, a driver and an application; the central processing unit is specifically used to: load the timing parameters set by the touch display unit from an external memory, and after converting the timing parameters into a control instruction format that can be recognized by the signal generating unit, write them into the signal generating unit according to a preset communication method. Among them, storing the timing parameters set by the touch display unit in the external memory of the main control chip can achieve the effect of not losing the power, and the stored timing parameters can be repeatedly loaded, thereby automatically completing the setting of each timing parameter of the touch display unit. For example, the central processing unit includes an ARM chip and its peripheral devices such as clock crystal oscillator, memory, etc., and the embedded operating system, the touch display unit touch screen driver and application are installed in the memory.

[0045] Optionally, the ARM chip is connected to the touch screen of the touch display unit. After the application is started, an application interface will appear on the touch screen of the touch display unit; when the "Save Parameters" button on the application interface is pressed, the set timing parameters are stored in the same memory outside the main control chip in the form of a file, so that they will not be lost in the event of power failure, and up to 50 files can be saved; through the "Load Parameters" button, select the timing parameter file to be loaded, and the timing parameters on the touch display unit application interface will be automatically set.

[0046] Optionally, the ARM chip reads the timing parameters and the "Start Test" button status set on the application interface, converts them into a control instruction format that can be recognized by the signal generating unit, and writes them into the signal generating unit through the ARM chip AXI interface; after writing, the control instructions received by the signal generating unit are read back through the ARM chip AXI interface and compared, and the comparison results are displayed on the application interface.

[0047] In this embodiment, the main control chip of the central processing unit is an embedded microprocessor, which is connected to the touch screen of the touch display unit; the embedded operating system, driver and application are solidified in the external memory of the main control chip of the central processing unit; after the main control chip runs the application, the application interface can be displayed on the touch display unit; when the "Save Parameters" button on the application interface is pressed, the set timing parameters are stored in the same memory outside the main control chip in the form of a file, so that they will not be lost in the event of power failure, and up to 50 files can be saved; through the "Load Parameters" button, select the timing parameter file to be loaded, and the timing parameters on the application interface of the touch display unit will be automatically set.

[0048] Exemplarily, the central processing unit is further configured to read back the control instructions received by the signal generating unit according to a preset communication method, compare the read-back control instructions with the control instructions written into the signal generating unit, and obtain a comparison result; and display the comparison result on the application interface. For example, the main control chip of the central processing unit reads the timing parameters and the "Start Test" button status set on the application interface, converts them into a control instruction format recognizable by the signal generating unit, and writes them into the signal generating unit via a communication method; after writing, the control instructions received by the signal generating unit are read back via a communication method and compared, and the comparison result is displayed on the application interface.

[0049] Exemplarily, the signal generating unit includes: a programmable logic device and an interface chip; the programmable logic device is used to output a takeoff signal, a separation signal, and a tank point liquid level sensor signal in accordance with the control instructions of the central processing unit; the interface chip is used to convert the level of the takeoff signal, the separation signal, and the tank point liquid level sensor signal and output them from the output interface; the programmable logic device is also used to recover the level of the output interface after the level conversion to obtain the recovered amount.

[0050] In this embodiment, after receiving the test process start control instruction written by the main control chip of the central processing unit, the programmable logic device of the signal generating unit simulates and outputs the takeoff signal, separation signal, 20-point fuel tank liquid level sensor signals and 20-point oxidizer tank liquid level sensor signals according to the written timing parameters; after receiving the test process end control instruction written by the main control chip of the central processing unit, all signals are reset.

[0051] Exemplarily, the signal generating unit includes an FPGA chip and its peripheral devices such as a clock crystal oscillator and a memory; the FPGA chip is connected to the central processing unit ARM chip through an AXI interface; the FPGA chip outputs takeoff signals, separation signals, 20-point fuel tank liquid level sensor signals, and 20-point oxidizer tank liquid level sensor signals through IO pins, and the initial states upon power-on are all invalid; after receiving the test process start control instruction written by the central processing unit ARM chip, the takeoff signal, separation signal, 20-point fuel tank liquid level sensor signals, and 20-point oxidizer tank liquid level sensor signals are simulated and output according to the written timing parameters; after receiving the test process end control instruction written by the central processing unit ARM chip, all signals are reset.

[0052] Optionally, the signal generation unit further includes multiple optocoupler chips that convert the output level of the signal generation unit FPGA chip to a level compatible with the propellant utilization system valve controller and output it through the signal output interface. The signal output from the signal output interface is converted to a level value matching the signal generation unit FPGA chip after passing through the optocoupler chip, and then retrieved by the FPGA chip. The central processing unit ARM chip reads the high and low level states of each signal retrieved by the signal generation unit FPGA chip via the AXI interface, generating a waveform that is displayed in real time on the touch display unit.

[0053] In an optional embodiment, the signal generating unit interface chip converts the takeoff signal, separation signal, 20-point fuel tank liquid level sensor signal, and 20-point oxidizer tank liquid level sensor signal levels output by the programmable logic device into level values that are compatible with the propellant utilization system valve controller and output them from the signal output interface.

[0054] Exemplarily, the central processing unit is further configured to read the recovery volume according to a preset communication method, and to display the recovery volume in real time on the application interface of the touch display unit in the form of a recovery waveform.

[0055] In an optional embodiment, the signal generating unit interface chip converts the signal level output by the signal output interface into a level value matching the programmable logic device of the signal generating unit, which is then sampled by the programmable logic device; the central processing unit main control chip reads the high and low level states of each signal sampled by the programmable logic device through communication, and generates a waveform that is displayed in real time on the touch display unit.

[0056] Optionally, the power conversion unit includes a DC / DC switching power supply, an LDO linear regulator, and peripheral resistors and capacitors, etc., which convert the external input DC voltage into internal DC voltages of multiple levels for use by the touch display unit, central processing unit, and signal generating unit.

[0057] This embodiment fully simulates various liquid level fault conditions in liquid launch vehicle tanks, achieving comprehensive reliability and robustness testing of the propellant utilization system's valve controller, effectively improving the system's performance. Furthermore, the system utilizes a human-machine interface to configure fault modes, offering ease of use, a user-friendly interface, a compact size, and low power consumption. This makes it suitable for a wide range of scenarios, including single-unit valve controller testing, propellant utilization system testing, and overall rocket range testing.

[0058] Illustratively, an embodiment of the present application further provides a method for simulating a liquid level failure in a liquid carrier rocket tank, which can be applied to the liquid level failure simulation device for a liquid carrier rocket tank in each of the above embodiments. The method may include the following steps:

[0059] Step 1: Display an application interface, and set a failure mode based on the application interface.

[0060] Step 2: Generate corresponding control instructions according to the set fault mode.

[0061] Step 3: According to the control instructions, output the takeoff signal, separation signal and tank point liquid level sensor signal with different timing requirements.

[0062] The takeoff signal, the separation signal, and the tank point liquid level sensor signal are used to simulate various fault conditions.

[0063] Step 4: Convert the external input primary power supply voltage into the internal secondary operating voltage.

[0064] This embodiment displays an application program interface and sets a fault mode based on the interface; generates corresponding control instructions based on the set fault mode; and outputs, based on the control instructions, takeoff signals, separation signals, and tank level sensor signals with different timing requirements. These takeoff signals, separation signals, and tank level sensor signals are used to simulate various fault conditions; and converts an externally input primary power supply voltage into an internal secondary operating voltage. This fully simulates various fault conditions of the liquid level in liquid carrier rocket tanks, enabling comprehensive testing of the reliability and robustness of the propellant utilization system valve controller, effectively improving the performance of the propellant utilization system. Furthermore, the device of this application features a user-friendly interface, a compact size, and low power consumption, making it suitable for a wide range of applications, including single-unit valve controller testing, propellant utilization system testing, and overall rocket range testing.

[0065] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0066] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A liquid carrier rocket tank level fault simulation device, characterized in that: The device includes: a touch display unit, a central processing unit, a signal generating unit, and a power conversion unit, wherein: The touch display unit is used to display an application program interface and set a fault mode based on the application program interface; The central processing unit is configured to generate a corresponding control instruction according to a fault mode set by the touch display unit, and send the control instruction to the signal generating unit; The signal generating unit is configured to output a takeoff signal, a separation signal, and a tank point liquid level sensor signal with different timing requirements according to the control instruction; wherein the takeoff signal, the separation signal, and the tank point liquid level sensor signal are used to simulate various fault conditions; The power conversion unit is used to convert an externally input primary power voltage into a secondary operating voltage for the touch display unit, the central processing unit, and the signal generating unit.

2. The device according to claim 1, characterized in that The failure mode includes at least one of a takeoff failure, a separation failure, a tank point liquid level sensor short circuit failure, a tank point liquid level sensor open circuit failure, and a liquid level sloshing failure.

3. The device according to claim 1, characterized in that The touch display unit is specifically used for: On the application interface, various fault modes are represented by setting the timing parameters of each signal, and after completing the setting of the fault mode, a waveform preview of the signal is generated; wherein the timing parameters include: signal delay parameters and signal jitter parameters.

4. The device according to claim 1, characterized in that The main control chip used by the central processing unit includes: an embedded microprocessor; the embedded microprocessor loads an embedded operating system, a driver and an application from an external memory; The central processing unit is specifically configured to: load the timing parameters set by the touch display unit from an external memory, convert the timing parameters into a control instruction format recognizable by the signal generating unit, and write the timing parameters into the signal generating unit according to a preset communication method; The timing parameters set for the touch display unit are stored in an external memory, so that the stored timing parameters can be repeatedly loaded to automatically complete the setting of the timing parameters of the touch display unit.

5. The device according to claim 4, characterized in that The central processing unit is also used to read back the control instructions received by the signal generating unit according to a preset communication method, and compare the read-back control instructions with the control instructions written into the signal generating unit to obtain a comparison result; and display the comparison result on the application interface.

6. The device according to claim 1, characterized in that The signal generating unit includes: a programmable logic device and an interface chip; The programmable logic device is used to output a takeoff signal, a separation signal, and a tank point liquid level sensor signal according to the control instructions of the central processing unit; The interface chip is used to convert the takeoff signal, the separation signal, and the tank point liquid level sensor signal into different levels and output them from the output interface; The programmable logic device is further used to recover the level after the output interface level conversion to obtain the recovered amount.

7. The device according to claim 6, characterized in that The central processing unit is further configured to read the recovery volume according to a preset communication method, and to display the recovery volume in real time on the application interface of the touch display unit in the form of a recovery waveform.

8. A method for simulating liquid level failure in a liquid carrier rocket tank, characterized in that: Applied to the liquid launch vehicle tank liquid level fault simulation device according to any one of claims 1 to 7, the method comprising: displaying an application program interface and setting a fault mode based on the application program interface; Generate corresponding control instructions according to the set fault mode; outputting a takeoff signal, a separation signal, and a tank level sensor signal with different timing requirements according to the control instruction; wherein the takeoff signal, the separation signal, and the tank level sensor signal are used to simulate various fault conditions; Convert the external input primary power supply voltage into the internal secondary operating voltage.

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