A fault injection device for a multi-parameter cooperative test platform of an aviation hydraulic system

Abstract

This invention discloses a fault injection device for a multi-parameter collaborative testing platform for aviation hydraulic systems. The device includes a pressure regulation module, a flow control module, a temperature control module, a signal processing unit, a fault injection module, a data storage unit, a display output module, and a safety exit module. This invention can monitor key parameters of aviation hydraulic systems such as pressure, flow rate, and temperature, and simulate various fault types to comprehensively evaluate the system's operating status and reliability. Real-time data output via display screen and voice broadcast facilitates operator monitoring. The safety exit module allows setting pressure thresholds to ensure the system enters a safe state under abnormal conditions. This invention improves testing efficiency, flexibility, and safety.

Description

Technical Field

[0001] This invention relates to the field of aviation hydraulic system testing and fault diagnosis, and in particular to a fault injection device for a multi-parameter collaborative testing platform for aviation hydraulic systems. Background Technology

[0002] To improve the reliability and safety of aviation hydraulic systems, multi-parameter collaborative testing and fault simulation are necessary. During operation, aviation hydraulic systems involve dynamic changes in multiple key parameters such as pressure, flow rate, and temperature. Abnormalities in these parameters can lead to performance degradation or even malfunction. However, current testing platforms have limitations in simulating real-world fault scenarios, struggling to flexibly inject various fault types and precisely control fault parameters, resulting in insufficient alignment between test results and actual operating conditions. Furthermore, existing devices are complex and inefficient in implementing multi-parameter collaborative monitoring and fault injection, impacting the overall progress of testing. To address these issues, we propose a fault injection device for a multi-parameter collaborative testing platform for aviation hydraulic systems. Summary of the Invention

[0003] The purpose of this invention is to provide a fault injection device for a multi-parameter collaborative testing platform for aviation hydraulic systems, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a fault injection device for a multi-parameter collaborative testing platform for an aviation hydraulic system includes a pressure regulation module, a flow control module, a temperature control module, a signal processing unit, a fault injection module, a data storage unit, a display output module, and a safe exit module. The pressure regulation module, flow control module, temperature control module, and fault injection module each send detection signals to the signal processing unit for processing. The signal processing unit transmits the processed signals to the data storage unit for storage, and the data storage unit transmits the stored data to the display output module. The signal processing unit also transmits the processed signals to the safe exit module. A dynamic load simulation module is also included, which sends a load signal to the pressure regulation module. The pressure regulation module sends a real-time pressure signal to the signal processing unit for processing. The flow control module includes a left-flow regulation unit, a right-flow regulation unit, an upward flow regulation unit, and a downward flow regulation unit. These units respectively send left-flow, right-flow, upward, and downward flow signals to the signal processing unit for processing. The temperature control module includes a left temperature control unit and a right temperature control unit. These units send left and right temperature signals to the signal processing unit for processing, respectively. The signal processing unit processes signals sequentially from the pressure regulation module, flow control module, temperature control module, and fault injection module. The pressure regulation module sends a pressure signal to the signal processing unit, which then transmits the processed pressure signal to the safety exit module, which is configured with a pressure threshold. The display output module includes a voice broadcast unit and a display screen unit. The display screen unit uses an LCD screen. Both the display screen unit and the voice broadcast unit receive stored data results transmitted from the data storage unit.

[0005] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention provides a fault injection device for a multi-parameter collaborative testing platform for aviation hydraulic systems. Through a pressure regulation module, flow control module, temperature control module, and fault injection module, it monitors key parameters such as pressure, flow, and temperature of the aviation hydraulic system and simulates and injects possible fault types, thereby comprehensively evaluating the system's operating status and reliability. A display screen unit shows real-time monitored pressure, flow, and temperature data, as well as the system response after fault injection. A voice broadcast unit announces the current system status and abnormal situations, facilitating timely monitoring of system dynamics by operators. A safe exit module monitors key system parameters; when parameters exceed preset ranges, a protection mechanism is triggered to prevent uncontrollable risks due to parameter anomalies. Furthermore, a dynamic load simulation module can simulate load changes under different operating conditions, further improving the realism and accuracy of the test. This invention, through the collaborative work of multiple modules, solves the shortcomings of existing testing platforms in terms of fault injection flexibility, multi-parameter collaborative monitoring capabilities, and ease of operation, significantly improving the efficiency and reliability of aviation hydraulic system testing.

[0006] Specifically, the pressure regulation module is connected to the external hydraulic circuit via an internally installed adjustable piston assembly. This piston assembly is driven by a stepper motor, which adjusts the piston position according to instructions from the signal processing unit, thereby changing the pressure value of the hydraulic system. The control signal for the stepper motor is generated by the signal processing unit and transmitted to the pressure regulation module. A pressure sensor collects the pressure value of the hydraulic system in real time and feeds the collected pressure signal back to the signal processing unit. The signal processing unit filters and corrects the received pressure signal before transmitting the processed signal to the data storage unit for storage.

[0007] The flow control module achieves precise control of the flow distribution in the hydraulic system through four independent flow regulation units. The left-hand, right-hand, upward, and downward flow regulation units are connected to the hydraulic pipeline via proportional valves. The opening of these proportional valves is dynamically adjusted by the signal processing unit according to testing requirements. Each flow regulation unit is equipped with a flow meter to collect flow signals in the corresponding direction in real time and transmits the collected signals to the signal processing unit for processing. After normalizing the flow signals, the signal processing unit transmits the processed signals to the data storage unit for storage.

[0008] The temperature control module achieves zoned temperature control of the hydraulic system through two independent temperature control units. The left and right temperature control units are connected to the hydraulic circuit via heaters and coolers, respectively. The operating status of the heaters and coolers is dynamically adjusted by the signal processing unit according to testing requirements. Each temperature control unit is equipped with a temperature sensor to collect temperature signals for its corresponding area in real time and transmits the collected signals to the signal processing unit for processing. After compensating and correcting the temperature signals, the signal processing unit transmits the processed signals to the data storage unit for storage.

[0009] The fault injection module simulates hydraulic system faults through a built-in solenoid valve array. The array consists of multiple independently controlled solenoid valves, each controlled individually by a signal processing unit. The signal processing unit generates corresponding control signals based on preset fault types and parameters and transmits them to the solenoid valve array, thereby simulating fault scenarios such as sudden pressure changes, abnormal flow rates, or temperature fluctuations in the hydraulic system. The fault injection module is also equipped with high-precision sensors to monitor the system response signals in real time after fault injection and transmits the monitored signals to the signal processing unit for further processing.

[0010] The signal processing unit receives detection signals from various modules via a high-speed data acquisition card and performs filtering, amplification, and digitization on the signals. The processed signals are then transmitted sequentially to the data storage unit according to a preset priority order. The data storage unit uses non-volatile memory chips to ensure data is not lost in the event of a power outage. The stored data is transmitted to the display output module via a communication interface for operators to view and analyze.

[0011] The display output module visualizes and voice-announces test data through an LCD screen and a voice broadcast unit. The LCD screen uses a high-resolution touchscreen, supports multi-window display and real-time curve plotting, allowing operators to intuitively understand the system status. The voice broadcast unit plays system status information through a built-in speaker, supports multiple languages, and meets the needs of different users.

[0012] The safety exit module uses built-in pressure sensors and a logic controller to monitor key system parameters in real time. When the monitored pressure value exceeds a preset threshold, the logic controller generates a protection signal and transmits it to the signal processing unit, triggering the system's emergency exit mechanism. The emergency exit mechanism ensures the system enters a safe state by closing all solenoid valves and stopping the stepper motor.

[0013] In summary, this invention, through the collaborative work of multiple modules, achieves comprehensive monitoring of multiple parameters and fault injection simulation of aviation hydraulic systems, significantly improving the efficiency and reliability of testing work while ensuring the safety of the testing process. Attached Figure Description

[0014] Figure 1 This is an overall system block diagram of a fault injection device for a multi-parameter collaborative testing platform for aviation hydraulic systems. Figure 2 The specific signal processing sequence of the signal processing unit of a fault injection device for a multi-parameter collaborative test platform of an aviation hydraulic system; Figure 3 A detailed structural block diagram of the flow control module of a fault injection device for a multi-parameter collaborative testing platform for an aviation hydraulic system; Figure 4 A detailed structural block diagram of the temperature control module of a fault injection device for a multi-parameter collaborative testing platform for an aviation hydraulic system; Figure 5 This is a structural block diagram of the fault injection module of a fault injection device for a multi-parameter collaborative testing platform for aviation hydraulic systems.

[0015] Reference numerals: 1. Pressure regulation module; 2. Flow control module; 3. Temperature regulation module; 4. Fault injection module; 5. Signal processing unit; 6. Data storage unit; 7. Display output module; 8. Safe exit module; 9. Left flow regulation unit; 10. Right flow regulation unit; 11. Upward flow regulation unit; 12. Downward flow regulation unit; 13. LCD display unit; 14. Voice broadcast unit. Detailed Implementation

[0016] The fault injection device for the multi-parameter collaborative testing platform of the aviation hydraulic system of the present invention includes multiple modules and units, and its specific implementation is as follows. Figure 1 As shown, the pressure regulating module 1 is connected to an external hydraulic circuit via hydraulic lines. Internally, it houses an adjustable piston assembly driven by a stepper motor. The stepper motor receives control signals from the signal processing unit 5 to adjust the piston position, thereby changing the pressure value of the hydraulic system. A pressure sensor is installed on the hydraulic lines to collect pressure signals in real time and sends these signals to the signal processing unit 5 for filtering and correction. The signal processing unit 5 transmits the processed pressure signal to the data storage unit 6 for storage and simultaneously sends the pressure signal to the safety exit module 8 to monitor whether the pressure exceeds a preset threshold.

[0017] Flow control module 2, for example Figure 2As shown, the system includes a left-flow regulating unit 9, a right-flow regulating unit 10, an upward-flow regulating unit 11, and a downward-flow regulating unit 12. Each flow regulating unit is connected to a hydraulic pipeline via a proportional valve, and the opening degree of the proportional valve is dynamically adjusted by the signal processing unit 5 according to testing requirements. Each flow regulating unit is equipped with a flow meter to collect the flow signal in the corresponding direction in real time and transmit it to the signal processing unit 5 for normalization processing. The signal processing unit 5 sequentially stores the processed flow signal to the data storage unit 6 and transmits the result to the display output module 7 for the operator to view.

[0018] The temperature control module 3 includes a left temperature control unit and a right temperature control unit, which are connected to the hydraulic circuit via a heater and a cooler, respectively. The operating status of the heater and cooler is dynamically adjusted by the signal processing unit 5 according to the test requirements. Each temperature control unit is equipped with a temperature sensor to collect the temperature signal of the corresponding area in real time and send the signal to the signal processing unit 5 for compensation and correction. The processed temperature signal is also stored in the data storage unit 6 and output through the display output module 7.

[0019] The fault injection module 4 simulates hydraulic system faults through a built-in solenoid valve array. This array consists of multiple independently controlled solenoid valves, each controlled separately by the signal processing unit 5. The signal processing unit 5 generates control signals based on preset fault types and transmits them to the solenoid valve array, thereby simulating fault scenarios such as sudden pressure changes, abnormal flow, or temperature fluctuations in the hydraulic system. High-precision sensors monitor the system response signals in real time after fault injection and transmit these signals to the signal processing unit 5 for processing.

[0020] The signal processing unit 5 receives detection signals from various modules via a high-speed data acquisition card and performs filtering, amplification, and digitization processing on the signals. The processed signals are then sequentially transmitted to the data storage unit 6 for storage according to a preset order. The data storage unit 6 uses a non-volatile memory chip to ensure that data is not lost in the event of a power outage. The stored data is transmitted to the display output module 7 via a communication interface and displayed on the LCD screen unit 13. The voice broadcast unit 14 plays system status information through a built-in speaker.

[0021] like Figure 3 As shown, the display output module 7 includes an LCD screen unit 13 and a voice broadcast unit 14. The LCD screen unit 13 uses a high-resolution touchscreen, supports multi-window display and real-time curve plotting, allowing operators to intuitively understand the system status. The voice broadcast unit 14 supports multiple language switching to meet the needs of different users. The LCD screen unit 13 and the voice broadcast unit 14 are connected to the data storage unit 6 via a communication interface to receive stored data results.

[0022] The safety exit module 8 uses a built-in pressure sensor and logic controller to monitor key system parameters in real time. When the monitored pressure value exceeds a preset threshold, the logic controller generates a protection signal and transmits it to the signal processing unit 5 to trigger the emergency exit mechanism. The emergency exit mechanism ensures the system enters a safe state by closing all solenoid valves and stopping the stepper motor. The pressure regulation module 1, flow control module 2, temperature control module 3, fault injection module 4, signal processing unit 5, data storage unit 6, display output module 7, and safety exit module 8 are connected by signal lines, and the signal flow is as follows: Figure 1 As shown.

[0023] The dynamic load simulation module is connected to the pressure regulation module 1 via a load signal line. It simulates load changes under different operating conditions and sends load signals to the pressure regulation module 1. The pressure regulation module 1 adjusts the pressure value of the hydraulic system based on the received load signal and sends the real-time pressure signal to the signal processing unit 5 for processing. The signal transmission and collaborative operation between the modules ensure comprehensive monitoring of multiple parameters of the aviation hydraulic system and simulation of fault injection.

[0024] In this embodiment, the stepper motor of the pressure regulating module 1 is connected to the piston assembly via a threaded shaft. The rotational motion of the stepper motor is converted into the linear motion of the piston to change the pressure value of the hydraulic system. A pressure sensor is installed at the outlet of the hydraulic pipeline to ensure that the collected pressure signal can accurately reflect the real state of the hydraulic system. The proportional valve of the flow control module 2 controls the opening size through an electromagnetic coil. The current of the electromagnetic coil is provided by the signal processing unit 5. The opening size of the proportional valve directly affects the flow distribution in the hydraulic pipeline. The heater and cooler of the temperature control module 3 are connected to the hydraulic oil circuit through a heat transfer medium. The flow of the heat transfer medium is driven by a micro pump to ensure the uniformity and stability of temperature control.

[0025] The solenoid valve array of fault injection module 4 is connected to signal processing unit 5 via signal lines. The opening and closing of each solenoid valve is individually controlled by signal processing unit 5. The response speed and actuation accuracy of the solenoid valves directly affect the fault injection effect; therefore, a high-response-speed and high-precision model is selected for the solenoid valve array. The high-speed data acquisition card of signal processing unit 5 receives detection signals from each module via multiple input ports. The sampling frequency and resolution of the acquisition card are optimized to meet testing requirements. The non-volatile memory chip of data storage unit 6 is connected to signal processing unit 5 via a bus. The capacity and read / write speed of the memory chip are designed to meet the needs of long-term testing.

[0026] The LCD display unit 13 of the display output module 7 is connected to the signal processing unit 5 via a flexible circuit board. The flexible circuit board design ensures the stability and reliability of signal transmission. The voice broadcast unit 14 is connected to the signal processing unit 5 via an audio amplifier. The gain and frequency response of the audio amplifier are adjusted to ensure the clarity and sound quality of the voice broadcast. The logic controller of the safety exit module 8 is connected to the solenoid valve and stepper motor via relays. The relay action time is optimized to ensure a rapid response of the emergency exit mechanism.

[0027] In this embodiment, the load signal of the dynamic load simulation module is generated by an analog circuit. The output signal of the analog circuit is amplified by a power amplifier and then sent to the pressure regulation module 1. The gain and bandwidth of the power amplifier are designed to meet the variation range and frequency requirements of the load signal. Shielded cables are used for the signal lines between modules to reduce electromagnetic interference and ensure the accuracy of signal transmission. The power supply for each module is provided by a regulated power supply, and the output voltage and current of the regulated power supply are designed to meet the power consumption requirements of each module.

[0028] In this embodiment, the coordinated operation of the pressure regulation module 1, flow control module 2, temperature control module 3, fault injection module 4, signal processing unit 5, data storage unit 6, display output module 7, and safe exit module 8 is achieved through a software program, which runs on the embedded processor of the signal processing unit 5. The embedded processor's clock frequency and memory capacity are designed to meet the needs of multitasking. The functional modules of the software program include a signal acquisition module, a signal processing module, a data storage module, a display output module, and a safe exit module. The functional modules communicate with each other through a message queue to ensure the real-time performance and reliability of signal transmission.

[0029] In this embodiment, the stepper motor drive circuit of the pressure regulation module 1 adopts an H-bridge drive circuit, and the switching element of the H-bridge drive circuit is a field-effect transistor to improve drive efficiency and reliability. The proportional valve control circuit of the flow control module 2 adopts pulse width modulation technology, and the duty cycle of the pulse width modulation signal is dynamically adjusted by the signal processing unit 5 according to the test requirements. The heater and cooler control circuit of the temperature control module 3 adopts bidirectional thyristor power regulation technology, and the firing angle of the bidirectional thyristor is dynamically adjusted by the signal processing unit 5 according to the test requirements. The solenoid valve control circuit of the fault injection module 4 adopts optocoupler isolation technology. The input end of the optocoupler is connected to the signal processing unit 5, and the output end is connected to the solenoid valve to ensure the isolation and anti-interference capability of the control signal.

[0030] In this embodiment, the high-speed data acquisition card of the signal processing unit 5 uses an analog-to-digital converter (ADC) to convert analog signals into digital signals. The resolution and sampling frequency of the ADC are designed to meet testing requirements. The non-volatile memory chip of the data storage unit 6 uses flash memory technology. The number of erase / write cycles and storage life of the flash memory are designed to meet the requirements of long-term testing. The liquid crystal display unit 13 of the display output module 7 uses thin-film transistor (TFT) technology. The switching speed and brightness of the TFT are designed to meet display requirements. The audio amplifier of the voice broadcast unit 14 uses Class D amplifier technology. The efficiency and distortion of the Class D amplifier are designed to meet the requirements of voice broadcasting.

[0031] In this embodiment, the logic controller of the safe exit module 8 is implemented using a programmable logic device (PLD). The input terminal of the PLD is connected to the pressure sensor, and the output terminal is connected to the relay, ensuring the flexibility and reliability of the logic control. The analog circuit of the dynamic load simulation module is implemented using an operational amplifier. The gain and bandwidth of the operational amplifier are designed to meet the variation range and frequency requirements of the load signal. The shielded cables between the modules use a twisted-pair structure to reduce electromagnetic interference and ensure the accuracy of signal transmission. The regulated power supply for each module adopts switching power supply technology. The efficiency and stability of the switching power supply are designed to meet the power supply requirements of each module.

[0032] In this embodiment, the stepper motor drive circuit of the pressure regulation module 1 is connected to the signal processing unit 5 via a control signal line. The length and impedance of the control signal line are designed to ensure the stability and reliability of signal transmission. The proportional valve control circuit of the flow control module 2 is connected to the signal processing unit 5 via a control signal line. The shielding layer of the control signal line is connected to the ground line to reduce electromagnetic interference. The heater and cooler control circuit of the temperature regulation module 3 is connected to the signal processing unit 5 via a control signal line. The shielding layer of the control signal line is connected to the ground line to reduce electromagnetic interference. The solenoid valve control circuit of the fault injection module 4 is connected to the signal processing unit 5 via a control signal line. The shielding layer of the control signal line is connected to the ground line to reduce electromagnetic interference.

[0033] In this embodiment, the high-speed data acquisition card of the signal processing unit 5 is connected to each module via signal lines, and the shielding layer of the signal lines is connected to the ground line to reduce electromagnetic interference. The non-volatile memory chip of the data storage unit 6 is connected to the signal processing unit 5 via a bus, and the width and speed of the bus are designed to meet the data transmission requirements. The liquid crystal display unit 13 of the display output module 7 is connected to the signal processing unit 5 via a flexible circuit board, and the length and impedance of the flexible circuit board are designed to ensure the stability and reliability of signal transmission. The audio amplifier of the voice broadcast unit 14 is connected to the signal processing unit 5 via signal lines, and the shielding layer of the signal lines is connected to the ground line to reduce electromagnetic interference.

[0034] In this embodiment, the logic controller of the safe exit module 8 is connected to the signal processing unit 5 via signal lines, and the shielding layer of the signal lines is connected to the ground wire to reduce electromagnetic interference. The analog circuit of the dynamic load simulation module is connected to the signal processing unit 5 via signal lines, and the shielding layer of the signal lines is connected to the ground wire to reduce electromagnetic interference. The shielded cables between the modules adopt a twisted-pair structure to reduce electromagnetic interference and ensure the accuracy of signal transmission. The regulated power supply of each module is connected to each module via power lines, and the cross-sectional area and length of the power lines are designed to meet the power supply requirements. To better enable those skilled in the art to fully understand and implement this invention, the specific implementation principle of this invention is further explained below in conjunction with a specific application scenario.

[0035] First, during the initial testing and startup of the aviation hydraulic system, the pressure regulation module 1 drives the piston assembly via a stepper motor to adjust the initial pressure value of the hydraulic system. The stepper motor receives control signals from the signal processing unit 5, and its rotational motion is converted into linear motion of the piston via a threaded shaft, thereby changing the pressure distribution in the hydraulic lines. At this time, a pressure sensor installed at the hydraulic line outlet collects pressure signals in real time and sends these signals to the signal processing unit 5 for filtering and correction. The signal processing unit 5 transmits the processed pressure signal to the data storage unit 6 for storage, and simultaneously sends the signal to the safety exit module 8 to monitor whether the pressure exceeds a preset threshold. If the pressure value exceeds the safe range, the logic controller in the safety exit module 8 generates a protection signal and triggers an emergency exit mechanism to ensure the system enters a safe state.

[0036] Secondly, in the flow control module 2, the left-flow regulating unit 9, the right-flow regulating unit 10, the upward flow regulating unit 11, and the downward flow regulating unit 12 are connected to the hydraulic pipeline via proportional valves. The signal processing unit 5 dynamically adjusts the opening of the proportional valves according to the test requirements, and the electromagnetic coil receives the current provided by the signal processing unit 5 to control the opening of the proportional valves. Each flow regulating unit is equipped with a flow meter to collect the flow signal in the corresponding direction in real time and transmit the signal to the signal processing unit 5. After normalizing the received flow signal, the signal processing unit 5 stores the processing result sequentially in the data storage unit 6 and displays the result on the LCD screen unit 13 of the display output module 7 for the operator to view. In this process, the accurate acquisition and processing of the flow signal ensures real-time monitoring of the flow distribution in the hydraulic system.

[0037] Subsequently, the temperature control module 3 performs zoned temperature control of the hydraulic circuit through the left and right temperature control units. The heater and cooler are connected to the hydraulic circuit via heat transfer media, the flow of which is driven by a micro-pump, ensuring uniformity and stability of temperature control. Each temperature control unit is equipped with a temperature sensor to collect temperature signals for the corresponding area in real time and send the signals to the signal processing unit 5. After compensating and correcting the temperature signals, the signal processing unit 5 stores the processed signals in the data storage unit 6 and outputs them through the display output module 7. This process achieves precise temperature control of the hydraulic system, providing a stable temperature environment for subsequent fault injection.

[0038] Next, the fault injection module 4 simulates various fault scenarios in the hydraulic system through its built-in solenoid valve array. The signal processing unit 5 generates control signals based on preset fault types and transmits them to the solenoid valve array; each solenoid valve is individually controlled by the signal processing unit 5. The rapid response and high-precision action of the solenoid valves ensure the effectiveness of fault injection, simulating scenarios such as sudden pressure changes, abnormal flow, or temperature fluctuations. High-precision sensors monitor the system response signals in real time after fault injection and transmit these signals to the signal processing unit 5 for processing. This process verifies the operating status and reliability of the hydraulic system under different fault conditions.

[0039] Based on this, the signal processing unit 5 receives detection signals from various modules via a high-speed data acquisition card and performs filtering, amplification, and digitization processing on the signals. The analog-to-digital converter converts the analog signals into digital signals, which are then transmitted sequentially to the data storage unit 6 for storage according to a preset order. The non-volatile memory chip uses flash memory technology to ensure that data is not lost in the event of a power outage. The stored data is transmitted to the display output module 7 via a communication interface and displayed on the LCD screen unit 13. The voice broadcast unit 14 plays system status information through its built-in speaker. This process achieves efficient acquisition, processing, and storage of multi-parameter signals, providing reliable data support for subsequent analysis.

[0040] Finally, the dynamic load simulation module generates a load signal through analog circuitry, which is then amplified by a power amplifier and sent to the pressure regulation module 1. The pressure regulation module 1 adjusts the pressure value of the hydraulic system based on the received load signal and sends the real-time pressure signal to the signal processing unit 5 for processing. This process simulates load changes under different operating conditions, further improving the realism and accuracy of the test. Signal transmission between modules is achieved through shielded cables, and power supply is provided by a regulated power supply, ensuring the stability of signal transmission and the normal operation of each module.

[0041] In summary, the collaborative operation of each module enables comprehensive monitoring of multiple parameters and fault injection simulation of the aviation hydraulic system. Through the coordination of pressure regulation module 1, flow control module 2, temperature control module 3, fault injection module 4, and dynamic load simulation module, the efficiency and reliability of the testing work are significantly improved, while ensuring the safety of the testing process.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fault injection device for a multi-parameter collaborative testing platform for aviation hydraulic systems, characterized in that, The system includes a pressure regulation module (1), a flow control module (2), a temperature control module (3), a fault injection module (4), a signal processing unit (5), a data storage unit (6), a display output module (7), and a safety exit module (8). The pressure regulation module (1), flow control module (2), temperature control module (3), and fault injection module (4) each send detection signals to the signal processing unit (5) for processing. The signal processing unit (5) transmits the processed signals to the data storage unit (6) for storage. The data storage unit (6) transmits the stored data to the display output module (7). The signal processing unit (5) transmits the processed signals to the safety exit module (8). The module (8) also includes a dynamic load simulation module, which sends a load signal to the pressure regulation module (1), and the pressure regulation module (1) sends a real-time pressure signal to the signal processing unit (5) for processing; the flow control module (2) includes a left flow regulation unit (9), a right flow regulation unit (10), an upward flow regulation unit (11) and a downward flow regulation unit (12), which respectively send left flow signal, right flow signal, upward flow signal and downward flow signal to the signal processing unit (5) for processing.

2. The fault injection device for a multi-parameter collaborative testing platform of an aviation hydraulic system according to claim 1, characterized in that: The temperature control module (3) includes a left temperature control unit and a right temperature control unit. The left temperature control unit and the right temperature control unit respectively send the left temperature signal and the right temperature signal to the signal processing unit (5) for processing.

3. The fault injection device for a multi-parameter collaborative testing platform of an aviation hydraulic system according to claim 1, characterized in that: The signal processing unit (5) processes signals in the following order: pressure regulation module (1), flow control module (2), temperature regulation module (3), and fault injection module (4).

4. The fault injection device for a multi-parameter collaborative testing platform of an aviation hydraulic system according to claim 1, characterized in that: The pressure regulation module (1) sends a pressure signal to the signal processing unit (5) for processing. The signal processing unit (5) transmits the processed pressure signal to the safety exit module (8). The safety exit module (8) is equipped with a pressure threshold.

5. The fault injection device for a multi-parameter collaborative testing platform of an aviation hydraulic system according to claim 1, characterized in that: The display output module (7) includes a voice broadcast unit (14) and a liquid crystal display unit (13). The liquid crystal display unit (13) adopts thin film transistor technology. The liquid crystal display unit (13) and the voice broadcast unit (14) receive the stored data results transmitted by the data storage unit (6).

6. The fault injection device for a multi-parameter collaborative testing platform of an aviation hydraulic system according to claim 1, characterized in that: The fault injection module (4) includes a solenoid valve array, which consists of multiple independently controlled solenoid valves, each of which is individually controlled by a signal processing unit (5).

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