A power input safety pre-test system, method, and medium

Abstract

The application relates to a power input safety pretest system, method and medium, and relates to the airborne equipment airworthiness test technical field.The power input safety pretest system comprises a power supply characteristic simulation power supply unit, a test configuration regulation unit, a power supply characteristic acquisition and analysis unit, a main control evaluation unit and an anti-interference protection unit.The power supply characteristic simulation power supply unit is used for simulating corresponding power input signals according to preset power supply test parameters.The test configuration regulation unit is used for switching the simulation power supply test topology of the to-be-tested airborne equipment according to a test topology switching signal in combination with the power input signals.Through comprehensive simulation of multiple power input scenes such as normal voltage steady state, pulsating voltage, instantaneous interruption and harmonic distortion, a specific power range is covered, the test requirements of different types of airborne equipment are met, and the scene simulation integrity and power adaptability are improved.

Description

Technical Field

[0001] This application relates to the field of airborne equipment airworthiness testing technology, and in particular to a power input safety pre-testing system, method and medium. Background Technology

[0002] The power input adaptability of airborne equipment directly determines its stability and safety during flight, and it must pass rigorous tests in multiple scenarios, including voltage fluctuations, frequency shifts, harmonic distortion, and transient interruptions.

[0003] Existing patents disclose an automatic testing system and method for the power supply characteristics of airborne power supplies, addressing technical problems such as poor human-machine interaction, high cost, complex structure, inability to guarantee testing accuracy, and poor compatibility in existing technologies. The testing system includes a power supply module, a load module, a data acquisition module, and a host computer system. The power supply module includes an AC programmable power supply and a DC programmable power supply, respectively used to power the product under test (DUT). The load module includes a DC load and an AC load, respectively used to provide load to the DUT. The data acquisition module collects the input and output signals of the DUT and transmits them to the host computer system, which processes the signals and outputs the test results. The host computer system controls the start and stop of the AC and DC programmable power supplies, and controls the loading and unloading of the DC and AC loads. Based on this testing system, the invention also provides an automatic testing method for the power supply characteristics of airborne power supplies.

[0004] The existing technical solutions mentioned above have the following drawbacks: 1. The existing simulation scenarios are not fully covered. Most systems can only achieve basic voltage steady-state testing and cannot accurately reproduce complex fault scenarios such as voltage distortion and millisecond-level instantaneous interruption in specific frequency bands. Moreover, the power adaptation range is narrow. 2. The anti-interference capability is insufficient. High-power power modules and high-precision acquisition units have not taken effective isolation measures. Electromagnetic coupling interference leads to large deviations in test data and affects the reliability of test results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a power input safety pre-testing system, method, and medium that comprehensively simulates various power input scenarios, including normal voltage steady state, pulsating voltage, instantaneous interruption, and harmonic distortion, covering a specific power range and fully meeting the testing needs of different types of airborne equipment. The completeness of scenario simulation and power adaptability are significantly improved.

[0006] This was achieved using the following technical solutions: In a first aspect, this application provides a power input safety pre-testing system, comprising: The power supply characteristic simulation power supply unit is used to simulate and generate corresponding power input signals according to preset power supply test parameters; The test configuration control unit is used to switch the analog power test topology of the airborne equipment under test according to the test topology switching signal and the power input signal. The power characteristic acquisition and analysis unit is used to monitor the switching process of the simulated power test topology of the airborne equipment under test, acquire the topology operating parameters, and build a topology test data pool. The main control evaluation unit is used to analyze power input test items, extract test power parameters and simulate power test topology, and coordinate the control of the above units in conjunction with power safety test standards to output a power input test verification evaluation table.

[0007] By adopting the above technical solution, programmable power input signals are generated based on waveform synthesis algorithms. The power test architecture is simulated by switching the topology of the airborne equipment under test through state machine control. Data fusion and rule engine are used to collect operating parameters in real time and build a test data pool to realize automated collaborative analysis and evaluation of power input test items, and finally output a verification table. This significantly improves the coverage, automation level and evaluation accuracy of power testing.

[0008] Furthermore, the power supply characteristic simulation power supply unit includes: The power quality simulation layer is used to jointly regulate the main power supply and auxiliary power supply according to preset standard test parameters to generate a conventional power input signal. The auxiliary power supply includes a low-voltage DC auxiliary power supply, a high-voltage DC auxiliary power supply, and a three-phase intermediate frequency auxiliary power supply; The voltage distortion generation layer is used to perform Fourier fusion on the conventional power input signal according to the preset distortion test parameters to generate the test distortion voltage signal. The frequency offset control layer is used to adjust the frequency of the conventional power input signal according to preset frequency fluctuation parameters and generate a frequency fault voltage signal.

[0009] By adopting the above technical solution, a conventional signal is generated through the power quality simulation layer, the voltage distortion generation layer uses Fourier transform to fuse harmonic components, and the frequency offset control layer generates fault waveforms based on the frequency modulation algorithm. This achieves seamless integration of conventional, distorted, and frequency fault signals, significantly improving the coverage and realism of airborne equipment power supply testing.

[0010] Furthermore, the configuration control unit was tested, including: An independent contact layer is used to control the on / off state of the power input signal based on the signal type and configuration switching timing, and to determine the on / off state of the topology. The resistive simulated load layer is used to derive the test topology based on the resistive simulated load and the topology on / off state, and to construct a simulated topology for equipment operating conditions. The configuration topology switching layer is used to perform timing switching of the equipment operating condition simulation topology according to the test topology switching signal, and to determine the topology configuration during the test.

[0011] By adopting the above technical solution, based on timing control and state machine algorithm, the on / off control is realized by independent contact layer according to signal type, the resistive simulation load layer dynamically derives the operating condition topology, and then the configuration topology switching layer switches according to the timing of the switching signal, thus constructing a highly flexible and high-fidelity equipment operating condition simulation test topology, which significantly improves the configuration adaptability and automation level of power supply testing.

[0012] Furthermore, the power supply characteristic acquisition and analysis unit includes: The synchronous acquisition layer is used to monitor the topology configuration during the test according to the topology test timing and to collect topology operating parameters; The data cleaning layer is used to filter and denoise the topology operating parameters and correlate them with time series based on the acquisition frequency to obtain noise-free topology parameters. The data analysis layer is used to perform time-frequency domain analysis on noiseless topology parameters and calculate topology characteristic parameters; The state determination layer is used to determine the topology operating state based on the topology on / off status and topology characteristic parameters. The data storage layer is used to store topology feature parameters and topology running status according to the topology type identifier, and to build a topology test data pool.

[0013] By adopting the above technical solution, noiseless topology parameters are obtained based on time-series synchronous acquisition and Kalman filtering algorithm, and time-frequency domain features are extracted through short-time Fourier transform. Combined with state machine logic, the topology operating status is accurately determined. Finally, a topology test data pool is constructed by hierarchically storing data according to type identification. This significantly improves the automation level, data quality, and accuracy of status diagnosis of power supply test parameter acquisition.

[0014] Furthermore, the main control evaluation unit includes: The task parsing layer is used to parse the power input test items and extract the topology test timing, test power parameters and simulated power test topology; The power monitoring layer is used to monitor the input power supply, collect power supply operating parameters, and build a power supply life cycle model. The timing association layer is used to associate the analog power supply test topology according to the topology test timing and extract the topology switching timestamp; The evaluation and judgment layer is used to compare the topology operation parameters with the topology target parameters based on the topology switching timestamp; If any topology operating parameter is not within the tolerance range of the topology target parameter, the current power input parameter is determined to be abnormal, and the power input signal is traced to locate the abnormal input source. The positioning and evaluation layer is used to identify the state of abnormal input sources based on the power supply life cycle model, mark abnormal power supply parameters, and calculate the absolute value of power supply parameter deviation in combination with the test power supply parameters. If the absolute value of any power parameter deviation is greater than the preset parameter deviation threshold, the current power supply operating state is determined to be abnormal, and the deviation compensation value is calculated. If not, the current power supply operating state is determined to be normal, and the actual topology switching time is compared with the topology switching timestamp to calculate the timing compensation value; The constraint transformation layer is used to perform constraint verification on deviation compensation values ​​and timing compensation values ​​according to power safety test standards. If the verification is successful, the deviation compensation value and timing compensation value are converted according to the preset signal format to generate power control signal and test topology switching signal; The collaborative control layer is used to distribute and interpret power regulation signals and test topology switching signals according to the execution unit identifier, so as to obtain power combination configuration parameters and topology configuration correction timing. The correction verification layer is used to adjust the timing and coordinate the above-mentioned execution units according to the power supply combination adjustment parameters and topology configuration, and output the power input test verification evaluation table.

[0015] By adopting the above technical solution, a test baseline is constructed through task analysis and life cycle monitoring. The abnormal input source and power status are located by using timing correlation and parameter comparison technology. The deviation and timing compensation value are calculated and converted into control signals after being verified by safety standards. The test topology and power parameters are corrected in a closed loop with each unit. Finally, a verification evaluation table is output, which significantly improves the automation, accuracy and dynamic self-adaptation capability of airborne equipment power input testing.

[0016] Furthermore, the anti-interference protection unit includes: An aluminum alloy shielding partition is installed between the power supply unit and the acquisition unit, and the surface of the partition is coated with an electromagnetic shielding coating; the power supply characteristics are simulated by the power supply unit input terminal equipped with an EMI filter and a purified power supply.

[0017] Secondly, this application also provides a power input safety pre-testing method, which adopts the following technical solution; A power input safety pre-test method includes: The main power supply and auxiliary power supply are jointly controlled according to the preset power test parameters to generate the corresponding power input signal; The on / off state of the topology is determined by combining the signal type with the on / off control power input signal of the configuration switching timing. Based on the resistive simulated load and the on / off state of the topology, the test topology is derived and the equipment operating condition simulation topology is constructed. Based on the test topology switching signal timing sequence, the equipment operating conditions are simulated to determine the topology configuration during the test. Based on the topology configuration during the topology test timing monitoring test, collect topology operation parameters; Based on the sampling frequency filtering and denoising, and the time-series associated topology operating parameters, the noise-free topology parameters are obtained; The time-frequency domain is used to analyze the noiseless topology parameters, calculate the topology characteristic parameters, and determine the topology operating state by combining the topology on / off state. Analyze the power input test items and extract the topology test timing, test power parameters, and simulated power test topology; Based on the topology test timing association with the simulated power supply test topology, the topology switching timestamp is extracted, and the topology operating parameters are compared with the topology target parameters to determine the abnormal input source; Monitor the input power supply, collect power supply operating parameters, build a power supply life cycle model, detect abnormal input sources, and mark abnormal power supply parameters; Based on the abnormal power supply parameters and the test power supply parameters, calculate the absolute value of the parameter deviation, determine the power supply operating status, and calculate the test compensation value. The conversion test compensation value is a compensation correction signal, which coordinates and controls each execution unit to output a power input test verification evaluation table.

[0018] By adopting the above technical solution, a programmable power supply test topology is constructed by integrating waveform synthesis algorithm (Fourier fusion distortion) and state machine timing control. Operational features are extracted by Kalman filtering and short-time Fourier transform. Combined with power supply life cycle model closed-loop calculation of deviation compensation and generation of control signals, the full-process automation and dynamic adaptive evaluation of airborne equipment power input testing is realized, which significantly improves test coverage, accuracy and efficiency.

[0019] Thirdly, this application also provides a storage medium storing at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, at least one program, code set, or instruction set is loaded and executed by a processor to implement the power input safety pre-testing method as described above.

[0020] In summary, the beneficial technical effects of this application are as follows: By comprehensively simulating 13 types of power input scenarios, including normal voltage steady state, pulsating voltage, instantaneous interruption, and harmonic distortion, covering a specific power range, it meets the testing needs of different types of airborne equipment and significantly improves the completeness of scenario simulation and power adaptability. By employing anti-interference designs such as shielding and isolation, and filtering and grounding, combined with high-precision acquisition hardware, the accuracy of voltage and current testing has been improved, the deviation of test data has been reduced, and the reliability and consistency have been enhanced. With its modular hardware design, each unit is connected through a standardized interface. Modules can be added or removed according to testing needs, providing excellent scalability and versatility. It is suitable for power input safety pre-testing of various airborne equipment such as military aircraft, helicopters, and drones. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the power input safety pre-testing system in this application; Figure 2 This is a schematic diagram of the main control evaluation unit in this application; Figure 3 This is a flowchart illustrating the power input safety pre-testing method in this application. Detailed Implementation

[0022] The present application will be further described in detail below with reference to the accompanying drawings.

[0023] In a first aspect, this application discloses a power input safety pre-testing system, comprising: The power supply characteristic simulation power supply unit is used to simulate and generate corresponding power input signals according to preset power supply test parameters; The test configuration control unit is used to switch the analog power test topology of the airborne equipment under test according to the test topology switching signal and the power input signal. The power characteristic acquisition and analysis unit is used to monitor the switching process of the simulated power test topology of the airborne equipment under test, acquire the topology operating parameters, and build a topology test data pool. The main control evaluation unit is used to analyze the power input test items, extract the test power parameters and simulate the power test topology, and, in conjunction with the power safety test standards, coordinate and control the above units to output the power input test verification evaluation table. An anti-interference protection unit is used to install an aluminum alloy shielding partition between the power supply unit and the acquisition unit. The surface of the partition is coated with an electromagnetic shielding coating. The power supply characteristics are simulated by the power supply unit input terminal equipped with an EMI filter and a purified power supply.

[0024] Reference Figure 1In this embodiment, the power supply characteristic simulation power supply unit is the core power output module of the system, responsible for generating various standard and abnormal power input signals. It adopts a redundant configuration scheme of "main power supply + auxiliary power supply". The main power supply uses the FDP-3300 high-precision power quality simulator, supporting two core voltage levels: 28VDC (output power ≥3kW) and 270VDC (output power ≥30kW), with a voltage conversion rate ≥3V / us. The DC ripple voltage is controlled at ≤100mVrms (28VDC) and ≤300mVrms (270VDC), respectively, accurately simulating basic test scenarios such as normal voltage steady state, pulsating voltage, and surge voltage. The auxiliary power supply configuration includes a 2kW low-voltage DC auxiliary source (IT-M3902D), an 18kW high-voltage DC auxiliary source (IT6018D), and a 15kVA three-phase intermediate frequency auxiliary source (AFV-315AYT). The three-phase intermediate frequency auxiliary source supports a constant frequency of 400Hz and narrow / wide range frequency conversion output, adapting to the AC power supply testing needs of different types of airborne equipment.

[0025] To simulate complex fault scenarios, the unit incorporates a voltage distortion generator and a frequency offset controller. The voltage distortion generator uses Fourier synthesis technology to generate a distortion spectrum of 10Hz~200kHz, with the distortion amplitude continuously adjustable within the range of 0~10Vrms. It can handle a power load of ≥800W and accurately reproduce 3rd and 5th harmonic interference scenarios. The frequency offset controller supports frequency adjustment from 45Hz~55Hz (power frequency) and 380Hz~420Hz (intermediate frequency) in 0.1Hz steps, simulating power frequency fluctuation faults. All power modules integrate OVP (overvoltage protection), OTP (overtemperature protection), OCP (overcurrent protection), and open-circuit protection functions to ensure safe and stable testing. The test configuration control unit enables automated switching of test topologies and load simulation. Its core consists of a contactor module, a configuration topology switching device, and a resistive simulated load device. The contactor module uses CE-certified high-voltage DC contactors, supporting a wide voltage range of 450V~1500V, a continuous current carrying capacity of ≥400A, and millisecond-level actuation time. It is divided into three independent contactor groups, corresponding to main power input, distortion signal coupling, and load switching control, respectively. Precise contact opening and closing is achieved through electrical signals issued by the main control unit, requiring no manual intervention.

[0026] The configuration topology switching device, based on a programmable logic controller (PLC), automatically switches between three topologies: conventional testing, voltage distortion testing, and resistive load connection. The switching time is ≤5 seconds, and the main circuit current carrying capacity is ≥150A. The device incorporates hardware interlocking and software timing control logic. When one group of contactors operates, the others remain open, effectively preventing short-circuit risks. A contactor status feedback module is also included, providing real-time feedback of contact on / off status to the main control unit to ensure switching accuracy. The resistive simulated load device employs a non-inductive resistor design, divided into two groups based on voltage levels: 28VDC (load power ≥3kW) and 270VDC (load power ≥30kW). The adjustment accuracy is ±3%, and it supports programmable load adjustment. It can simulate the power consumption of airborne equipment under different operating conditions. The load resistor surface features a heat-dissipating coating and is equipped with a forced air cooling system to prevent overheating damage during prolonged testing.

[0027] The power characteristic acquisition and analysis unit is responsible for the synchronous acquisition and analysis of parameters such as voltage, current, and frequency during the test. Its core hardware includes the PXES-2590 data acquisition host, high-precision acquisition modules, and a data processing terminal. The PXES-2590 is a 9-slot hybrid PXIe chassis, supporting up to 8GB / s system bandwidth, with all peripheral slots providing 1GB / s slot bandwidth. It is compatible with various module types such as PXI and PXI Express, and is equipped with an intelligent chassis management system that can monitor internal temperature, fan speed, and DC voltage in real time to ensure the stability of the acquisition process.

[0028] The acquisition module is configured with a PXIe-9842 high-speed digitizer and a ZDL5000 high-sampling-rate data acquisition module: the PXIe-9842 is a 14-bit single-channel module with a sampling rate of up to 200MS / s and a bandwidth of 100MHz, capable of accurately capturing transient voltage pulse signals; the ZDL5000 module has a voltage testing range of ±800V, a current testing range of 0~1000A, a sampling rate of ≥2MS / s / channel, and supports simultaneous acquisition of voltage and current signals. The data processing terminal has built-in dedicated acquisition and analysis software that can perform time-domain and frequency-domain analysis on the acquired data, automatically calculate key parameters such as distortion coefficient, harmonic content, and power factor, complete test data playback within 3 seconds, and support the generation of standardized reports according to the RTCA / DO-160G standard template. Data storage adopts a dual mode of local hard drive (≥8TB) and cloud backup to ensure no data loss.

[0029] The main control and evaluation unit uses an industrial control computer (processor i7 / E5 or higher, memory ≥16GB) and integrates system control software to achieve unified scheduling and control of other units. The control software supports user management, task management, and report management functions. It includes complete test programs and waveform libraries from Chapter 16 of RTCA / DO-160G, allowing users to directly select preset test items or customize test parameters (such as voltage amplitude, distortion frequency, test duration, etc.). The software displays test data and waveforms in real time, uses color to mark abnormal data points, and supports pause, resume, and emergency stop operations during the test. After the test is completed, it automatically generates a standardized report containing test parameters, waveforms, analysis results, and pass / fail criteria, significantly reducing manual intervention costs.

[0030] The anti-interference protection unit ensures the accuracy of system testing, employing a full-process protection design of "isolating interference sources, cutting off coupling paths, and enhancing anti-interference capabilities." A 2mm thick aluminum alloy shielding partition is installed between the power supply unit and the acquisition unit, with an electromagnetic shielding coating sprayed on the surface, providing a shielding effectiveness of ≥80dB (30MHz~1GHz frequency band). The power supply characteristics are simulated by equipping the power supply unit input with an EMI filter and a purified power supply (UPS) to filter out conducted interference from the power grid. The core acquisition module adopts an independent grounding design with a grounding resistance ≤4Ω. All equipment metal casings are connected through equipotential copper busbars to eliminate potential differences between equipment and avoid ground loop interference.

[0031] The cables are twisted-pair shielded (shielding coverage ≥90%). The horizontal distance between high-voltage lines (≥220V) and low-voltage signal lines is ≥2m, and they cross at a 90° angle to reduce electromagnetic coupling. The signal cable length is controlled to ≤3m, with excess length wound into coils with a diameter ≥30cm to avoid damage to the shielding layer caused by small-radius bending. A 10μH inductor is connected in series with a 100pF capacitor in parallel to form a low-pass filter circuit to filter out high-frequency interference. TVS diodes (SMBJ6.5CA) are added to the communication interfaces (Ethernet, RS485) to suppress electrostatic discharge and pulse interference.

[0032] Preferably, the power supply characteristic simulation power supply unit includes: The power quality simulation layer is used to jointly regulate the main power supply and auxiliary power supply according to preset standard test parameters to generate a conventional power input signal. The auxiliary power supply includes a low-voltage DC auxiliary power supply, a high-voltage DC auxiliary power supply, and a three-phase intermediate frequency auxiliary power supply; The voltage distortion generation layer is used to perform Fourier fusion on the conventional power input signal according to the preset distortion test parameters to generate the test distortion voltage signal. The frequency offset control layer is used to adjust the frequency of the conventional power input signal according to preset frequency fluctuation parameters and generate a frequency fault voltage signal.

[0033] In this embodiment, during the power supply characteristic compliance test of a certain type of civil airliner's airborne flight management computer, the power supply characteristic simulation power supply unit first uses the power quality simulation layer to jointly regulate the main power supply (115V / 400Hz three-phase AC), low-voltage DC auxiliary source (2kW), high-voltage DC auxiliary source (18kW), and three-phase intermediate frequency auxiliary source (15kVA / 400Hz independent circuit) according to the power input standard test parameters. This generates conventional power input signals with voltage steady-state accuracy of ±1% and ripple ≤2%, which are used to simulate the clean power supply during the normal flight phase of the aircraft.

[0034] Subsequently, the voltage distortion generation layer, according to distortion test parameters (such as 3% 3rd harmonic, 2% 5th harmonic, 1% 7th harmonic, and 5% peak overvoltage, lasting 200ms), superimposes each harmonic onto the conventional AC signal using a Fourier series weighted fusion method, generating a test distortion voltage signal with a total harmonic distortion rate of 8% to simulate polluted power supply under engine starting or lightning strike induction conditions; the frequency offset control layer, according to frequency fluctuation parameters (first linearly decreasing from 400Hz to 360Hz at a rate of 20% per second, maintaining for 50ms, and then decreasing at a rate of 20% per second),... The frequency of the input signal is adjusted in real time to 440Hz (30% rate increase, then finally back to 400Hz), generating a frequency fault voltage signal to simulate transient frequency disturbances when the generator is unloaded or fails to connect in parallel. The above three types of signals are automatically injected into the power supply port of the computer under test according to the test sequence to verify whether it can still maintain normal operation and communication functions under extreme conditions such as power quality degradation, harmonic distortion and large frequency swings. Finally, the power supply characteristics are judged to meet the airworthiness requirements based on whether the equipment resets, has data errors or functional degradation.

[0035] Preferably, the test configuration control unit includes: An independent contact layer is used to control the on / off state of the power input signal based on the signal type and configuration switching timing, and to determine the on / off state of the topology. The resistive simulated load layer is used to derive the test topology based on the resistive simulated load and the topology on / off state, and to construct a simulated topology for equipment operating conditions. The configuration topology switching layer is used to perform timing switching of the equipment operating condition simulation topology according to the test topology switching signal, and to determine the topology configuration during the test.

[0036] In this embodiment, during the verification of the high-temperature ground power supply characteristics of an airborne computer on a certain type of civil passenger aircraft, the independent contact layer of the test configuration control unit, based on the signal type (such as AC main power supply and DC auxiliary power supply) and configuration switching timing, uses a solid-state relay array to perform millisecond-level on / off control of the power input signal, determining three topology on / off states: "main power supply only," "main and auxiliary power supply in parallel," and "auxiliary power supply only." The resistive simulated load layer, based on a pre-calibrated resistive simulated load (such as 1.5kW for normal computer operation and 2.2kW for peak operation) and the current topology on / off state, dynamically evolves the test topology to construct equipment condition simulation topologies simulating different operating conditions such as computer idling, takeoff calculation, and landing self-test. Finally, the configuration topology switching layer, based on the test topology switching signal issued by the host computer (such as switching the topology every 30 seconds), performs timing switching of the equipment condition simulation topology, sequentially verifying the computer's voltage drop, ripple, and transient response performance under each configuration, thereby determining the optimal topology configuration for each test condition and ensuring that the power supply characteristic test covers all critical operating modes.

[0037] Preferably, the power supply characteristic acquisition and analysis unit includes: The synchronous acquisition layer is used to monitor the topology configuration during the test according to the topology test timing and to collect topology operating parameters; The data cleaning layer is used to filter and denoise the topology operating parameters and correlate them with time series based on the acquisition frequency to obtain noise-free topology parameters. The data analysis layer is used to perform time-frequency domain analysis on noiseless topology parameters and calculate topology characteristic parameters; The state determination layer is used to determine the topology operating state based on the topology on / off status and topology characteristic parameters. The data storage layer is used to store topology feature parameters and topology running status according to the topology type identifier, and to build a topology test data pool.

[0038] In this embodiment: In the automated verification of the power supply characteristics of an airborne flight management computer of a certain type of civil passenger aircraft, the synchronous acquisition layer of the power supply characteristic acquisition and analysis unit synchronously monitors the voltage, current and power parameters under each topology configuration at a sampling rate of 1MS / s according to the preset topology test sequence (the main power supply, auxiliary power supply and dual-source parallel topology are switched every 20 seconds), and collects the topology operating parameters; the data cleaning layer uses a Butterworth low-pass filter with a cutoff frequency of 5kHz to denoise the parameters, and uses timestamps to correlate the dynamic processes such as voltage ripple and current drop to obtain noise-free topology parameters; the data analysis layer performs fast Fourier transform and wavelet packet decomposition on the cleaned parameters to extract topology characteristic parameters such as voltage ripple coefficient (≤2%), transient voltage drop amplitude (such as a drop of 5% during main-auxiliary switching), current rise time (≤50μs) and power factor under each topology.

[0039] The status judgment layer combines the current topology on / off status (e.g., "main power only on") and determines the topology operating status as "abnormal" when the ripple coefficient exceeds 3% or the voltage drop is greater than 8%. Conversely, if all characteristic parameters are within the design tolerance, it is determined as "normal". The data storage layer uses the topology type identifier (e.g., "TOP_MAIN", "TOP_AUX", "TOP_PARALLEL") as the primary key to persist the characteristic parameters and operating status of each test to the time series database, building a topology test data pool containing hundreds of records.

[0040] Preferably, refer to Figure 2 The main control evaluation unit includes: The task parsing layer is used to parse the power input test items and extract the topology test timing, test power parameters and simulated power test topology; The power monitoring layer is used to monitor the input power supply, collect power supply operating parameters, and build a power supply life cycle model. The timing association layer is used to associate the analog power supply test topology according to the topology test timing and extract the topology switching timestamp; The evaluation and judgment layer is used to compare the topology operation parameters with the topology target parameters based on the topology switching timestamp; If any topology operating parameter is not within the tolerance range of the topology target parameter, the current power input parameter is determined to be abnormal, and the power input signal is traced to locate the abnormal input source. The positioning and evaluation layer is used to identify the state of abnormal input sources based on the power supply life cycle model, mark abnormal power supply parameters, and calculate the absolute value of power supply parameter deviation in combination with the test power supply parameters. If the absolute value of any power parameter deviation is greater than the preset parameter deviation threshold, the current power supply operating state is determined to be abnormal, and the deviation compensation value is calculated. If not, the current power supply operating state is determined to be normal, and the actual topology switching time is compared with the topology switching timestamp to calculate the timing compensation value; The constraint transformation layer is used to perform constraint verification on deviation compensation values ​​and timing compensation values ​​according to power safety test standards. If the verification is successful, the deviation compensation value and timing compensation value are converted according to the preset signal format to generate power control signal and test topology switching signal; The collaborative control layer is used to distribute and interpret power regulation signals and test topology switching signals according to the execution unit identifier, so as to obtain power combination configuration parameters and topology configuration correction timing. The correction verification layer is used to adjust the timing and coordinate the above-mentioned execution units according to the power supply combination adjustment parameters and topology configuration, and output the power input test verification evaluation table.

[0041] In this embodiment, during the airworthiness compliance test of the power supply characteristics of a certain type of shipborne helicopter flight control computer, the task analysis layer of the main control evaluation unit first analyzes the power input test items, extracting the topology test sequence (alternating every 15 seconds) including the switching between main power (115V / 400Hz) and emergency power (28V DC), test power parameters (steady-state voltage ±1%, ripple ≤2%, frequency 400Hz ±5Hz), and simulated power test topologies (single main power supply, single emergency power supply, dual-source parallel connection, and main source failure configurations); the power monitoring layer uses voltage... The current transformer and current clamp monitor the input power supply in real time at a sampling rate of 100kS / s, collecting operating parameters such as effective voltage value, frequency, harmonic distortion rate and peak current. Based on the cumulative power-on time of the equipment and historical fault data, a power supply life cycle model is constructed (estimated remaining life of 1500 hours). The timing association layer associates the four simulated power supply test topologies with the corresponding time windows according to the topology test timing sequence, and extracts the expected timestamp of each topology switch (e.g., switching to the main source at T0, switching to emergency at T0+5s, parallel connection at T0+10s, and simulating main source failure at T0+15s). Within 50ms after each switch, the evaluation and judgment layer compares the collected topology operating parameters (such as voltage drop depth, recovery time, and frequency overshoot at the moment of switching) with the preset topology target parameter tolerance range (voltage drop ≤ 8%, recovery time ≤ 20ms, frequency overshoot ≤ 2%). When it is found that the voltage drop reaches 12% during the main source failure switch, exceeding the 8% tolerance, it determines that the current power input parameters are abnormal and traces the power input signal to locate the abnormal input source as the contactor action delay of the simulated main source failure switcher.

[0042] The positioning and evaluation layer uses the power supply lifecycle model to identify the abnormal input source, marking the contactor action delay parameter (measured delay 15ms vs. rated 5ms), and calculates the absolute value of the power supply parameter deviation (ΔV=4%) based on the test power supply parameters (rated voltage 115V). This value exceeds the preset 0.5% deviation threshold, indicating an abnormal power supply operating state. The layer then calculates the deviation compensation value, requiring a 14ms advance switching command. The constraint conversion layer performs constraint verification on the deviation compensation value (14ms advance) and the timing compensation value (none) according to power safety test standards (the advance amount does not exceed the safety window of 20ms, verification successful). It converts the compensation value into a power control signal (early trigger switching command) and a test topology switching signal (corrected switching timing) according to standard data format. The collaborative control layer interprets these signals into power combination allocation parameters (forcibly correcting the contactor action time simulated by the main source failure from 15ms to 5ms) and topology configuration correction timing (advancing the switching time by 14ms) based on the execution unit identifier (relay matrix, electronic load controller).

[0043] The correction and verification layer re-executes a round of tests based on the corrected parameters and timing-coordinated control of the signal generator, resistive load box, and switching switch. In this round, all topology operating parameters fall within the tolerance range. The final output is a power input test verification evaluation form containing the original anomaly record, compensation value calculation, corrected verification results, and conclusions, for the airworthiness certification body to review.

[0044] Reference Figure 3 This application discloses a power input safety pre-testing method, comprising: The main power supply and auxiliary power supply are jointly controlled according to the preset power test parameters to generate the corresponding power input signal; The on / off state of the topology is determined by combining the signal type with the on / off control power input signal of the configuration switching timing. Based on the resistive simulated load and the on / off state of the topology, the test topology is derived and the equipment operating condition simulation topology is constructed. Based on the test topology switching signal timing sequence, the equipment operating conditions are simulated to determine the topology configuration during the test. Based on the topology configuration during the topology test timing monitoring test, collect topology operation parameters; Based on the sampling frequency filtering and denoising, and the time-series associated topology operating parameters, the noise-free topology parameters are obtained; The time-frequency domain is used to analyze the noiseless topology parameters, calculate the topology characteristic parameters, and determine the topology operating state by combining the topology on / off state. Analyze the power input test items and extract the topology test timing, test power parameters, and simulated power test topology; Based on the topology test timing association with the simulated power supply test topology, the topology switching timestamp is extracted, and the topology operating parameters are compared with the topology target parameters to determine the abnormal input source; Monitor the input power supply, collect power supply operating parameters, build a power supply life cycle model, detect abnormal input sources, and mark abnormal power supply parameters; Based on the abnormal power supply parameters and the test power supply parameters, calculate the absolute value of the parameter deviation, determine the power supply operating status, and calculate the test compensation value. The conversion test compensation value is a compensation correction signal, which coordinates and controls each execution unit to output a power input test verification evaluation table.

[0045] In this embodiment: In the power supply characteristic simulation test of a certain type of transport aircraft generator controller (GCU), the system first jointly regulates the main / auxiliary power supply according to the preset power supply test parameters (main power 115V / 400Hz, auxiliary power 28V DC, slew rate 5V / μs) to generate power input signals for normal and fault conditions; based on the signal type (AC / DC) and the configuration switching sequence (rotating between four modes: main, auxiliary, dual-source parallel, and single-source failure every 30 seconds), the power input signal is controlled by the on / off control of the solid-state relay array to determine the current topology on / off state (e.g., "main source on, auxiliary source off"); the resistive simulated load (simulating GCU rated 2kW, peak 3kW) is combined with the on / off state to derive the test topology and construct the equipment condition simulation topology corresponding to the normal, overload, and emergency operation of the engine; according to the test topology switching signal (rising edge valid) issued by the host computer, the equipment condition simulation topology is switched in 50ms steps to determine the topology configuration in the test (e.g., "main source normal → main source failure → auxiliary source on"). Simultaneously, voltage, current, frequency, and phase are monitored at a sampling rate of 1 MS / s under each topology configuration to collect topology operating parameters. A 5 kHz low-pass filter and moving average denoising are used to associate parameters of different topology switching stages according to timestamps to obtain noise-free topology parameters. Characteristic parameters such as voltage ripple coefficient (≤1.5%), transient voltage drop depth (≤6%), and recovery time (≤15 ms) are calculated by FFT and wavelet packet decomposition. Combined with the topology on / off status, the topology operating status is determined to be "normal" or "warning".

[0046] The power input test items were analyzed, and the topology test timing (30-60-90-120s), test power parameters (steady-state accuracy ±1%, distortion rate 3%), and simulated power test topologies (four configurations) were extracted. The actual topology switching timestamps (e.g., 29.8s, 59.9s) were correlated with the theoretical timing, and the actual voltage drop (8.2%) was compared with the target tolerance (≤5%) to locate the abnormal input source as the excitation regulator response lag in the generator model. At the same time, the input power was monitored, and operating parameters such as the effective voltage value and total harmonics were collected. Based on the equipment's cumulative 2000 hours of power-on, a power life cycle model was constructed to identify mid-life degradation, and abnormal parameters were marked as "voltage response time exceeding tolerance". The absolute value of parameter deviation (Δ=3.2%, threshold 1%) was calculated to determine that the power operating state was abnormal, and the test compensation value that required to issue a switching command 8ms in advance was calculated. The compensation value is converted into a compensation correction signal (prematurely triggering relay closure), and the signal generator and switching matrix are retested in coordination. Finally, a power input test verification evaluation table is output, which includes anomaly location, compensation effect and final qualification judgment, providing complete data support for GCU airworthiness certification.

[0047] This application discloses a storage medium storing at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, at least one program, code set, or instruction set is loaded and executed by a processor to implement the power input safety pre-testing method as described above.

[0048] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A power input safety pre-testing system, characterized in that, include: The power supply characteristic simulation power supply unit is used to simulate and generate corresponding power input signals according to preset power supply test parameters; The test configuration control unit is used to switch the analog power test topology of the airborne equipment under test according to the test topology switching signal and the power input signal. The power characteristic acquisition and analysis unit is used to monitor the switching process of the simulated power test topology of the airborne equipment under test, acquire the topology operating parameters, and build a topology test data pool. The main control evaluation unit is used to analyze power input test items, extract test power parameters and simulate power test topology, and coordinate the control of the above units in conjunction with power safety test standards to output a power input test verification evaluation table.

2. The power input safety pre-testing system according to claim 1, characterized in that, The power supply characteristic simulation power supply unit includes: The power quality simulation layer is used to jointly regulate the main power supply and auxiliary power supply according to preset standard test parameters to generate a conventional power input signal. The voltage distortion generation layer is used to perform Fourier fusion on the conventional power input signal according to preset distortion test parameters to generate a test distortion voltage signal. The frequency offset control layer is used to adjust the frequency of the conventional power input signal according to preset frequency fluctuation parameters, and generate a frequency fault voltage signal.

3. The power input safety pre-testing system according to claim 1, characterized in that, The test configuration control unit includes: An independent contact layer is used to control the on / off state of the power input signal based on the signal type and configuration switching timing, and to determine the on / off state of the topology. A resistive simulated load layer is used to derive the test topology based on the resistive simulated load and the on / off state of the topology, and to construct a device operating condition simulation topology. The configuration topology switching layer is used to perform timing switching of the equipment operating condition simulation topology according to the test topology switching signal, and to determine the topology configuration during the test.

4. The power input safety pre-testing system according to claim 1, characterized in that, The power characteristic acquisition and analysis unit includes: The synchronous acquisition layer is used to monitor the topology configuration during the test according to the topology test timing and to collect topology operating parameters; The data cleaning layer is used to filter and denoise the topology operating parameters and correlate them with time series based on the acquisition frequency to obtain noise-free topology parameters. The data analysis layer is used to perform time-frequency domain analysis on the noiseless topology parameters and calculate the topology feature parameters; The state determination layer is used to determine the topology operating state based on the topology on / off state and the topology feature parameters. The data storage layer is used to store the topology feature parameters and the topology operating status according to the topology type identifier, and to build a topology test data pool.

5. The power input safety pre-testing system according to claim 1, characterized in that, The main control evaluation unit includes: The task parsing layer is used to parse the power input test items and extract the topology test timing, test power parameters and simulated power test topology; The power monitoring layer is used to monitor the input power supply, collect power supply operating parameters, and build a power supply life cycle model. The timing association layer is used to associate the analog power supply test topology with the topology test timing and extract the topology switching timestamp; An evaluation and judgment layer is used to compare the topology operation parameters with the topology target parameters based on the topology switching timestamp; If any topology operating parameter is not within the tolerance range of the topology target parameter, the current power input parameter is determined to be abnormal, and the power input signal is traced to locate the abnormal input source.

6. The power input safety pre-testing system according to claim 5, characterized in that, The main control evaluation unit also includes The positioning and evaluation layer is used to identify the state of abnormal input sources based on the power supply life cycle model, mark abnormal power supply parameters, and calculate the absolute value of power supply parameter deviation in combination with the test power supply parameters. If the absolute value of any power parameter deviation is greater than the preset parameter deviation threshold, the current power supply operating state is determined to be abnormal, and the deviation compensation value is calculated. If not, the current power supply operating state is determined to be normal, and the actual topology switching time is compared with the topology switching timestamp to calculate the timing compensation value; A constraint conversion layer is used to perform constraint verification on the deviation compensation value and the timing compensation value according to power safety test standards. If the verification is successful, the deviation compensation value and the timing compensation value are converted according to the preset signal format to generate a power control signal and a test topology switching signal. The collaborative control layer is used to distribute and interpret power regulation signals and test topology switching signals according to the execution unit identifier, so as to obtain power combination configuration parameters and topology configuration correction timing. The correction verification layer is used to adjust the timing of the above-mentioned execution units in accordance with the power combination configuration parameters and topology configuration, and output a power input test verification evaluation table.

7. The power input safety pre-testing system according to claim 2, characterized in that, The auxiliary power supply includes a low-voltage DC auxiliary power supply, a high-voltage DC auxiliary power supply, and a three-phase intermediate frequency auxiliary power supply.

8. A power input safety pre-test method, applied to the system according to any one of claims 1-7, characterized in that, include: The main power supply and auxiliary power supply are jointly controlled according to the preset power test parameters to generate the corresponding power input signal; The on / off state of the topology is determined by combining the signal type with the on / off control power input signal of the configuration switching timing. Based on the resistive simulated load and the on / off state of the topology, the test topology is derived, and the equipment operating condition simulation topology is constructed. The equipment operating condition simulation topology is switched according to the timing of the test topology switching signal to determine the topology configuration during the test.

9. The power input safety pre-testing method according to claim 8, characterized in that, The security pre-testing method further includes: Based on the topology configuration during the topology test timing monitoring test, collect topology operation parameters; Based on the sampling frequency, filtering and denoising, and time-series correlation of the topology operating parameters, noise-free topology parameters are obtained; The noiseless topology parameters are analyzed in the time-frequency domain, the topology characteristic parameters are calculated, and the topology operating state is determined by combining the topology on / off state. Analyze the power input test items and extract the topology test timing, test power parameters, and simulated power test topology; Based on the topology test timing association with the simulated power supply test topology, the topology switching timestamp is extracted, and the topology operating parameters are compared with the topology target parameters to determine the abnormal input source; Monitor the input power supply, collect power supply operating parameters, build a power supply life cycle model, detect abnormal input sources, and mark abnormal power supply parameters; Based on the abnormal power supply parameters and the test power supply parameters, calculate the absolute value of the parameter deviation, determine the power supply operating status, and calculate the test compensation value. The test compensation value is converted into a compensation correction signal, and each execution unit is coordinated and controlled to output a power input test verification evaluation table.

10. A storage medium storing at least one instruction, at least one program, a code set, or an instruction set, wherein the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the power input safety pre-testing method as claimed in any one of claims 8-9.

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