Input / output system interface card of aviation simulation aircraft and dynamic configuration method

Abstract

The invention belongs to the field of system interface cards, particularly relates to an input and output system interface card of an aviation simulation aircraft and a dynamic configuration method, and aims to solve the problems that in the prior art, the expansion capacity is insufficient, and key devices depend on imports. The system comprises a power supply conversion unit used for converting external input into multipath isolated DC voltage output and controlling power distribution; the programmable logic control unit is integrated with the processor core and is connected with the program / data / equipment information memory; the multifunctional signal processing unit comprises a high-frequency digital logic interface, a digital power output driver, a high-resistance programmable analog input module and a low-resistance driving analog output module; and the communication and topology unit is used for realizing board card dynamic networking and identity recognition based on a single-line topology protocol through serial bus communication. According to the invention, multi-signal type adaptive processing is realized, the expansion capability is improved, independent research and development are realized, and import dependence is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of system interface cards, and particularly relates to an input / output system interface card and a dynamic configuration method for an aviation simulation aircraft. Background Art

[0002] In an aviation simulation aircraft system, a general-purpose input / output (GPIO) interface component is the core hardware for realizing data interaction between a simulation computer and flight simulation components. Such an interface needs to undertake the processing tasks of multiple types of signals simultaneously, including high-frequency discrete logic signal acquisition, high-current load driving, wide-range analog-to-digital conversion, and high-isolation control, etc.

[0003] Currently, the following technical bottlenecks exist in the domestic aviation simulation equipment field: Defect of single function: The mainstream interface solutions mostly adopt discrete designs - functions such as digital signal processing, power driving, and analog-to-digital conversion are realized by independent circuit boards. This architecture results in low system integration, making it difficult to deploy in space-limited scenarios such as cockpit panels, and the cooperation of multiple circuit boards brings additional communication delays.

[0004] Insufficient expansion ability: Traditional interface cards lack the ability of dynamic reconfiguration, and the types of signal channels are fixed. When the simulation aircraft is upgraded (such as adding new sensors or actuators), it is necessary to redesign the hardware, significantly increasing the R & D cycle and maintenance cost.

[0005] Dependence on imported key devices: High-end interface core devices (such as programmable gate array chips, high-voltage isolation drive modules) have long relied on European and American suppliers. In recent years, international technology blockade has led to unstable device supply and shortage of maintenance spare parts, seriously restricting the reliability and continuous operation ability of domestic flight simulation equipment.

[0006] Based on this, the present invention proposes an input / output system interface card and a dynamic configuration method for an aviation simulation aircraft. Summary of the Invention

[0007] In order to solve the above problems in the prior art, the present invention provides an input / output system interface card for an aviation simulation aircraft, including: A power conversion unit configured to convert an external input voltage into multiple isolated DC voltage outputs and control power distribution; A programmable logic control unit integrating a processor core, connected to a program memory, a data exchange memory, and a device information memory; A multi-functional signal processing unit including multiple modules: A digital logic interface unit module for processing logic level signals higher than a preset discrete signal frequency; A digital power output module for driving load devices that require current amplification control; Programmable range analog input module with sampling channels having higher than standard input impedance; Configurable analog output module with current output capability to drive low impedance loads; Communication and topology management unit configured to communicate with a master device via a serial bus and implement dynamic networking and identity recognition between boards based on a single-wire topology protocol.

[0008] Furthermore, the power conversion unit includes an on-line monitoring sub-unit, the on-line monitoring sub-unit includes an analog-to-digital converter and a serial communication interface, and the programmable logic control unit is connected to the analog-to-digital converter through the serial communication interface to collect the output voltage data of each path of the power conversion unit in real time.

[0009] Furthermore, the analog-to-digital converter in the on-line monitoring sub-unit is configured as: Synchronously sample at least three different level voltages output by the power conversion unit to obtain sampling data; Pack and transmit the sampling data to the programmable logic control unit through the serial communication interface.

[0010] Furthermore, the multi-functional signal processing unit further includes a mixed signal extension sub-unit, and the mixed signal extension sub-unit includes: Isolated power output module for driving high-voltage loads; Power sensing input module for detecting the power supply status of the load device; Reconfigurable signal combination module for supporting dynamic configuration of multiple signal type interfaces.

[0011] Furthermore, the mixed signal extension sub-unit adopts a hierarchical physical architecture and a logical binding mechanism, specifically including: The first type of extension interface group, which configures multiple basic signal processing units to implement high-speed digital logic interfaces and power drive functions; The second type of extension interface group, which configures multiple of the mixed signal extension sub-units to provide isolated power output and power sensing functions; Among them, the units of the first type of extension interface group and the second type of extension interface group establish a dynamic routing relationship through the single-wire topology protocol to form a distributed signal network.

[0012] Furthermore, the programmable logic control unit is configured as: Analyze the voltage data packet transmitted by the analog-to-digital converter, and when a voltage anomaly is detected, trigger an overvoltage protection instruction or an undervoltage protection instruction to the power conversion unit.

[0013] Furthermore, the serial communication interface is a synchronous half-duplex serial bus, which includes: The clock signal line is driven by a programmable logic control unit; The data signal line enables bidirectional data transmission.

[0014] Furthermore, the power conversion unit accesses the main power supply through a multi-pin connector, generates a composite power output including positive and negative dual-channel operational voltages, multi-level DC voltages, and isolated drive voltages, and real-time monitors the status of each power supply through an analog-to-digital converter controlled by the programmable logic control unit.

[0015] Furthermore, the multi-functional general-purpose input / output system interface card is applied to the signal interaction system of a flight simulator and is used for: Establishing an adaptive signal channel between the simulation computer and flight components; Implementing dynamic power management of cockpit equipment; Generating device control signals with adjustable sub-region density.

[0016] In the second aspect of the present invention, a dynamic configuration method for an input / output system interface card of an aviation simulation aircraft is proposed. Based on an input / output system interface card of an aviation simulation aircraft, the port function combination is real-time reconstructed through the programmable logic control unit, and the working mode is selected according to the interaction requirements of the flight simulation panel; the working modes include: The first working mode activates the basic signal processing function to process digital logic signals, digital power drive signals, and conventional analog input / output signals; The second working mode activates the enhanced signal processing function to support isolated high-voltage drive, power status sensing, and expandable hybrid signal interfaces; Based on a predefined cascaded topology communication protocol, dynamic identity recognition and resource allocation are performed on multiple cascaded interface cards, and a distributed signal routing network across the board cards is established; Among them, the digital logic signal is bound to the interface card running the first working mode, and the isolated power signal is bound to the interface card running the second working mode.

[0017] The beneficial effects of the present invention: (1) By integrating multi-functional signal processing modules such as digital logic interfaces, power drives, and analog input / outputs on a single board, the system integration degree is significantly improved. It overcomes the problem of space occupation of traditional discrete boards, meets the deployment requirements of compact scenarios such as cockpit panels. It eliminates the data transfer link during multi-board cooperation, realizes the direct processing of signals inside the interface card, and improves the real-time performance.

[0018] (2) Through the programmable logic control unit and configurable signal channels, it supports the online switching of signal types (digital / analog / power) and function redefinition. It can adapt to the upgrade requirements of flight simulators (such as adding new sensors / actuators) without the need to redesign the hardware. The hardware reuse significantly reduces the development workload during device iteration, and reduces the maintenance cost and downtime risk.

[0019] (3) Optimize the circuit design and topology management protocol to be compatible with domestic programmable logic chips and isolation drive modules. Reduce the dependence on high-end devices from Europe and the United States and enhance the security of the supply chain.

[0020] (4) The digital logic interface supports the acquisition of high-frequency discrete signals, and the analog input module provides wide-range programmable sampling capabilities to meet the complex signal requirements of aviation simulation. The digital logic interface supports the acquisition of high-frequency discrete signals, and the analog input module provides wide-range programmable sampling capabilities to meet the complex signal requirements of aviation simulation. The digital logic interface supports the acquisition of high-frequency discrete signals, and the analog input module provides wide-range programmable sampling capabilities to meet the complex signal requirements of aviation simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objectives, and advantages of the present application will become more apparent: Figure 1 It is a schematic diagram of the power conversion unit in the input / output system interface card of an aviation simulation aircraft of the present invention; Figure 2 It is a schematic diagram of the online monitoring sub-unit in the input / output system interface card of an aviation simulation aircraft of the present invention; Figure 3 It is a schematic diagram of the programmable logic control unit in the input / output system interface card of an aviation simulation aircraft of the present invention; Figure 4 It is a schematic diagram of the programmable logic control unit controlling GPIO in the input / output system interface card of an aviation simulation aircraft of the present invention; Figure 5 It is a schematic diagram of the input / output system interface card of an aviation simulation aircraft of the present invention communicating with a computer; Figure 6 It is a schematic diagram of the cascade relationship between multiple input / output system interface cards of an aviation simulation aircraft of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further elaborates on the present application in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant invention and do not limit the invention. Additionally, it should be noted that for the sake of description, only parts related to the relevant invention are shown in the drawings.

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] The first embodiment of the present invention provides an input / output system interface card for an aviation simulation aircraft, including: A power conversion unit configured to convert an externally input voltage into a plurality of isolated DC voltage outputs and control power distribution; A programmable logic control unit integrating a processor core, connected to a program memory, a data exchange memory, and a device information memory; A multi-functional signal processing unit including multiple modules: A digital logic interface unit module for processing logic level signals higher than a preset discrete signal frequency; A digital power output module for driving load devices that require current amplification control; A programmable range analog input module having a sampling channel with a higher input impedance than the standard; A configurable analog output module having a current output capability for driving a low-impedance load; A communication and topology management unit configured to communicate with a master device through a serial bus and implement dynamic networking and identity recognition between boards based on a single-wire topology protocol.

[0025] For a clearer description of the input / output system interface card for an aviation simulation aircraft of the present invention, the following combines Figure 1 Each unit in the embodiment of the present invention is described in detail as follows: As Figure 1 shown, the power conversion unit is configured to convert an externally input voltage into a plurality of isolated DC voltage outputs and control power distribution; As Figure 2 shown, the power conversion unit includes an on-line monitoring sub-unit, and the on-line monitoring sub-unit includes an analog-to-digital converter and a serial communication interface. The programmable logic control unit is connected to the analog-to-digital converter through the serial communication interface to collect the output voltage data of each path of the power conversion unit in real time.

[0026] The serial communication interface is a synchronous half-duplex serial bus, which includes: A clock signal line driven by the programmable logic control unit; A data signal line for realizing bidirectional data transmission.

[0027] The analog-to-digital converter in the on-line monitoring sub-unit is configured to: Synchronously sample at least three different-level voltages output by the power conversion unit to obtain sampling data; Transmit the sampled data in a packet through the serial communication interface to the programmable logic control unit.

[0028] The power conversion unit accesses the main power supply through a multi-pin connector, generates a composite power output including positive and negative dual operational voltages, multi-level DC voltages, and isolated drive voltages, and real-time monitors the status of each power supply through an analog-to-digital converter controlled by the programmable logic control unit.

[0029] Specifically, in this embodiment, an external +28V aviation power supply is accessed through a DB15 interface, and a multi-level DC-DC conversion circuit is used to generate an isolated composite power supply: Operational voltage: ±15V (for analog circuits); Logic voltage: +3.3V / +2.5V / +1.2V (for FPGA cores); Drive voltage: +28VIO (specifically for the power output module); Power supply monitoring is controlled by the FPGA: Use an AD sampling chip with an I²C interface, preferably ADC121C027; Real-time collect 9 voltages such as +15V / -15V / +5V / +12V, etc.; transmit data packets to the FPGA through the SDA (data line) / SCL (clock line) of I²C.

[0030] See Figure 3 , the programmable logic control unit, integrates a processor core and is connected to a program memory, a data exchange memory, and a device information memory; The programmable logic control unit is configured to: Analyze the voltage data packets transmitted by the analog-to-digital converter, and when a voltage anomaly is detected, trigger an overvoltage protection instruction or an undervoltage protection instruction to the power conversion unit.

[0031] The core of the programmable logic control unit in this embodiment uses a Xilinx XC3S1600E FPGA, with a CPU core embedded; The connected program memory uses SPI Flash to store the FPGA configuration file; The data exchange memory uses 512KB SRAM for high-speed data caching; The device information memory uses I²C EEPROM to save the board ID and calibration parameters.

[0032] The working process is as follows: When powered on, the bitstream is loaded from the Flash to configure the logic function, interact with the IO unit through the address / data / control three-bus, and read the board identity information from the EEPROM for topology management.

[0033] The multi-functional signal processing unit includes multiple modules: The digital logic interface unit module is used to process logic level signals with a frequency higher than the preset discrete signal frequency; The digital power output module is used to drive load devices that require current amplification control; The programmable range analog input module has sampling channels with a higher input impedance than the standard; The configurable analog output module has the current output ability to drive low-impedance loads.

[0034] Specifically, refer to Figure 4 , the digital logic interface unit (DIOL) is used to process high-speed discrete signals of ≥1MHz, which is compatible with CMOS / TTL levels and realizes 20-way bidirectional IO channels.

[0035] The digital power output module (DOPS) is used to drive high-current loads (such as relays / indicators), with a maximum output of 50V / 500mA and a switching frequency of ≥10kHz; The digital power output module adopts a MOSFET drive circuit.

[0036] The programmable range analog input module (AIP) has an input range of 0 - 10V, an input impedance of 1M, a frequency response for DC 2Khz signals, and selects channels through a multiplexer and adapts the sensor range through a programmable gain amplifier (PGA).

[0037] The output range of the configurable analog output module (AOP) is ±10V, the driving ability is 20mA, and the bandwidth is DC~1kHz; In this embodiment, the impedance load range of the low-impedance load driven is between 500Ω and 10kΩ.

[0038] The circuit structure of the configurable analog output module includes: A voltage follower is constructed using an operational amplifier, and a current enhancement circuit is added to the output stage.

[0039] In this embodiment, the multi-functional signal processing unit further includes a mixed-signal extension sub-unit, and the mixed-signal extension sub-unit includes: The isolated power output module (DOPI) is used to drive high-voltage loads; in this embodiment, it is preferably optically isolated by an opto-coupler, that is, Opto-Isolator, which supports a high-voltage output of +250V / 120mA, such as driving avionics valves. A power-aware input module (DIP) for detecting the power supply status of the loaded device; it is used to detect the 28V IO power supply status and trigger overcurrent protection through a comparator.

[0040] A reconfigurable signal combination module for supporting dynamic configuration of multiple signal type interfaces: Dynamically configure the signal path through the FPGA, for example, redefine the AIP channel as DIOL; implement multifunctional display control through GPIOs.

[0041] The hybrid signal extension subunit adopts a hierarchical physical architecture and a logical binding mechanism, specifically including: The first type of extension interface group, which configures multiple basic signal processing units to implement high-speed digital logic interfaces and power drive functions; The second type of extension interface group, which configures multiple of the said hybrid signal extension subunits to provide isolated power output and power awareness functions; Among them, the units of the first type of extension interface group and the second type of extension interface group establish a dynamic routing relationship through the single-wire topology protocol to form a distributed signal network.

[0042] For the first type of extension interface group, it includes a socket on the upper layer of the board, which is configured as a GPIO and GPIOS function card slot, and can support up to 8 system cards at most. This interface group implements high-speed digital logic interfaces and power drive functions through basic signal processing units: among them, the GPIO card provides 20 DIOL channels, where the high speed refers to CMOS / TTL level discrete signals with a processing frequency higher than 1 MHz (such as the switch state of the instrument panel); the GPIOS card provides 16 DOPV power output channels (driving loads such as 28V indicator lights) and 10 AIP analog input channels (collecting 0 - 10V sensor signals), and its signal response delay is controlled within the microsecond level to meet the real-time requirements of flight simulation. All channels are directly controlled by the FPGA, and the physical layout adopts a high-density pin arrangement to adapt to the high-frequency signal interaction requirements of cockpit core devices.

[0043] For the second type of extension interface group, it includes a socket on the bottom surface of the board, which is dedicated to the GPIOM hybrid signal extension subunit and can support up to 3 extension cards at most. This interface group provides isolated power output and power awareness functions: each GPIOM card integrates 2 DOPI isolated high-voltage output channels (driving loads such as 250V / 120mA hydraulic valves through opto-isolation), and 16 DIOP power-aware input channels (real-time monitoring of the loaded state and abnormal fluctuations of the 28V IO power supply). The extension card adopts an electromagnetic shielding design to suppress the noise interference generated by high-voltage loads, and at the same time configures an overcurrent protection comparator to immediately trigger the FPGA protection mechanism when the detected power offset exceeds the limit, ensuring signal integrity in a high-noise environment.

[0044] See Figure 5 and Figure 6 , the dynamic routing of the distributed signal network is implemented in the following way: Two types of interface groups build a distributed signal network through the 1-Wire topology protocol: when the main FPGA is initialized, it sends a device enumeration instruction, and each expansion card responds with a 64-bit unique ID stored in the EEPROM (such as 36FFD90552172F46), and a topology mapping table containing 11 nodes (8 basic cards + 3 expansion cards) is established. During operation, the DIOL signals of the first type of interface group and the DOPI control instructions of the second type of interface group are bound through dynamic routing - for example, the switch signals of the rudder panel (processed by the GPIO card) are directly routed to the servo drive instructions (output by the GPIOM card), forming an adaptive signal channel across physical boards. This network supports pre-configuring signal paths according to the requirements of the flight panel and continuously synchronizes the status of each node through the 1-Wire bus, realizing the collaborative management of high- and low-frequency signals under a physically isolated architecture.

[0045] The communication and topology management unit is configured to communicate with the main control device through a serial bus and implement dynamic networking and identity recognition between boards based on the 1-Wire topology protocol.

[0046] The communication and topology management unit establishes a communication link with the main control computer through the RS232 serial port of the DB9 connector and transmits control instructions in a frame format with a baud rate of 115200bps, 8 data bits, no parity bit, and 1 stop bit (8N1). The physical layer connection follows the TIA / EIA-232-F standard, where pin 2 (TXD) sends data to the RXD end of the computer, and pin 3 (RXD) receives instructions from the TXD end of the computer (corresponding to the signal definitions of "TX RS_RX" and "RX RS_TX").

[0047] The implementation of dynamic networking and identity recognition between boards based on the 1-Wire topology protocol specifically includes: The implementation of dynamic networking and identity recognition between boards based on the 1-Wire topology protocol specifically includes: The main control board sends a device enumeration instruction through the 1-Wire topology protocol; Each expansion board responds to identity recognition through the unique identification code pre-stored in the device information memory, and a topology mapping table including board type and resource allocation is established; Dynamically bind the signal channel to the target board according to the requirements of the flight panel: Route high-frequency digital logic signals to the basic signal processing unit board of the first type of expansion interface group; Route the isolated power output signal to the mixed signal expansion sub-unit board of the second type of expansion interface group; Based on the topological mapping table, a distributed signal network is formed between multiple basic signal processing unit boards configured in the first type of expansion interface group and multiple mixed-signal expansion sub-unit boards configured in the second type of expansion interface group.

[0048] Specifically, the main FPGA sends device enumeration instructions through the open-drain output DQ bus, and each expansion card responds to the identity recognition request through the 64-bit laser ROM ID (such as 28-0000041AB0EE) pre-burned in the EEPROM; after successful recognition, a topological mapping table is established, and resources such as 16-way +28V offset signals and 10-way AIP analog acquisition channels are dynamically bound to the corresponding boards according to the requirements of the flight panel. For example, the DIOL switch signal of the rudder panel is routed to the GPIO card for processing, while the DOPI isolation drive instruction of the hydraulic valve is assigned to the GPIOM card for execution, and finally a distributed signal management network supporting 11 nodes (8 GPIO / GPIOS basic cards + 3 GPIOM expansion cards) is formed.

[0049] The multi-functional general input / output system interface card in this embodiment is applied to the signal interaction system of the flight simulator and is used for: Establishing an adaptive signal channel between the simulation computer and the flight components; Implementing dynamic power management of cockpit devices; Generating device control signals with adjustable density in sub-regions.

[0050] It should be noted that the input / output system interface card of an aviation simulation aircraft provided in the above embodiment is only illustrated by the division of the above functional units. In actual applications, the above functions can be allocated to different functional units according to needs, that is, the units or steps in the embodiments of the present invention can be further decomposed or combined. For example, the units in the above embodiment can be combined into one unit, or further split into multiple sub-units to complete all or part of the functions described above. The names of the units and steps involved in the embodiments of the present invention are only for distinguishing each module or step, and are not regarded as an improper limitation of the present invention.

[0051] In the second embodiment of the present invention, a dynamic configuration method for the input / output system interface card of an aviation simulation aircraft is proposed. Based on the input / output system interface card of an aviation simulation aircraft in the first embodiment, the port function combination is real-time reconstructed through the programmable logic control unit, and the working mode is selected according to the interaction requirements of the flight simulation panel; the working modes include: The first working mode, activating the basic signal processing function to process digital logic signals, digital power drive signals, and conventional analog input / output signals; The second working mode activates the enhanced signal processing function to support isolated high-voltage drive, power state sensing, and scalable mixed-signal interface; Based on the predefined cascaded topology communication protocol, dynamic identification and resource allocation of multiple cascaded interface cards are performed to establish a distributed signal routing network across boards; among them, digital logic signals are bound to the interface cards operating in the first working mode, and isolated power signals are bound to the interface cards operating in the second working mode.

[0052] Basic function mode (GPIO / GPIOS mode) Through the standardized function mode configured on the socket of the interface card, it is dedicated to the basic signal processing of the flight simulation panel. This mode supports general digital / analog interfaces: Signal types: include digital logic input / output (DIOL, compatible with CMOS / TTL levels above 1MHz), digital power output (DOPS, supporting switch control above 10kHz), analog input port (AIP, 0 - 10V / 1MΩ impedance / DC - 2kHz), and analog output port (AOP, ±10V / 20mA drive / DC - 1kHz).

[0053] Physical configuration: The interface is defined by the DB15 socket at the top of the board. A single board provides 20 DIOL channels, 20 DOPS channels, 4 AIP channels, and 2 AOP channels.

[0054] System expansion: It supports up to 8 GPIO / GPIOS board cascades for cockpit basic equipment control (such as button status reading, indicator light driving, instrument analog output).

[0055] Enhanced function mode (GPIOM mode) Through the extended function mode configured on the lower socket of the interface card, it supports high-voltage isolation and mixed-signal collaborative processing: Signal types: include isolated high-voltage output (DOPI, +250V / 120mA), power sensing input (DIP, 28V power supply status detection), digital power output (DOPV, 28V offset control), and reusable digital input / output / power interface (DIOP).

[0056] Physical configuration: The interface is defined by the extended socket at the bottom of the board. A single board provides 16 DOPV channels, 10 AIP + 10V extended input channels, and 2 DOPI high-voltage output channels.

[0057] System expansion: It supports up to 3 GPIOM board cascades for complex load driving (such as ignition simulation coil, hydraulic solenoid valve control) and multi-board topology management (identifying device identities through the 1-Wire protocol).

[0058] Mode switching and coordination mechanism The programmable logic control unit (FPGA) dynamically reconstructs the function combination according to the flight panel requirements: Basic mode: Activate the GPIO / GPIOS signal stack to process conventional discrete / analog signals.

[0059] Enhanced mode: Enable the GPIOM signal stack to expand high-voltage isolation, power monitoring, and mixed-signal interfaces.

[0060] Cascade management: Implement multi-board identity recognition and coordination through the 1-Wire communication protocol. For example, in the A600 flight simulator, when the Ethernet switch distributes data to high / low-density areas, the GPIOM module manages the signal routing and power monitoring of the cascaded boards.

[0061] In this embodiment, the programmable logic control unit executes the following collaborative control logic: Power dynamic distribution control: When the second working mode is activated, instruct the power conversion unit to increase the output power of the isolation drive voltage, and collect the fluctuation data of the isolation drive voltage in real time through the online monitoring subunit; if the fluctuation exceeds the preset threshold, trigger the isolated power output module in the mixed-signal expansion subunit to enter the current-limiting protection state; Signal routing binding: According to the board identity information identified by the communication and topology management unit, dynamically bind the sensor data collected by the programmable range analog input module to the board with a power-aware input module in the second type of expansion interface group to associate the load status with the sensor signal; Channel multiplexing reconstruction: In the reconfigurable signal combination module, according to the switching instruction of the first working mode or the second working mode, dynamically reconstruct the same physical interface between the digital logic interface unit and the configurable analog output module, and the power conversion unit synchronously switches the power supply type of the corresponding port.

[0062] In this embodiment, through the real-time interaction between the online monitoring subunit of the power conversion unit and the mixed-signal expansion subunit, the closed-loop management of power output and load status is realized. When the isolation drive voltage fluctuation exceeds the limit, the current-limiting protection is immediately triggered, solving the problem of actuator damage caused by power anomalies in the traditional solution and improving the reliability of high-voltage load drive (such as in the avionics valve control scenario).

[0063] In this embodiment, using the board identity information identified by the communication and topology management unit, the sensor data (collected by the programmable range analog input module) and the load status (detected by the power-aware input module) are dynamically associated, eliminating the signal transmission delay during multi-device coordination. For example, the rudder sensor data is directly connected to the servo drive board, improving the response speed.

[0064] The collaborative control logic further includes a fault interlock mechanism: When the on-line monitoring sub-unit detects an abnormal driving voltage of the digital power output module, the current output of the configurable analog output module is forcibly cut off; When the power perception input module detects a load short circuit, an overcurrent alarm is broadcast to the cascaded board through the single-wire topology protocol, triggering a power protection instruction across the board.

[0065] In this embodiment, when the voltage of the digital power output module is abnormal, the current of the analog output module is forcibly cut off to prevent the fault from spreading to the sensitive analog circuit; when a load short circuit is detected, an alarm is broadcast through the single-wire topology protocol to achieve a cross-board protection response, solving the risk of global paralysis caused by local faults in the cascaded system.

[0066] Under fault conditions, the abnormal board is automatically isolated, and the signal routing is reallocated by the topology management unit to ensure the continuous operation of other functional units, meeting the high availability requirements of the aviation simulation system The dynamic identity recognition and resource allocation specifically include: The communication and topology management unit of the main control board sends a topology discovery instruction, and the cascaded board responds through the 64-bit unique ID pre-stored in the device information memory; According to the device type code in the response ID, the board with the mixed signal extension sub-unit is automatically registered as a node of the second type of extension interface group; The high-frequency digital signal processing tasks are assigned to the nodes of the first type of extension interface group, and at the same time, the isolated power channel resources are reserved for the nodes of the second type of extension interface group.

[0067] In this embodiment, based on the device type code of the 64-bit ID, the high-frequency digital signals (such as >1MHz discrete logic) are automatically assigned to the boards of the first type of interface group, and the isolated power signals (such as 250V high-voltage drive) are bound to the boards of the second type of interface group, solving the problem of resource idleness of the function-fixed boards and further improving the hardware utilization rate. At the same time, the newly added board is automatically registered through the topology discovery protocol and obtains the preset resources, and can be integrated into the distributed signal network without manual configuration, meeting the rapid upgrade requirements of the flight simulator.

[0068] The terms "first", "second", etc. are used to distinguish similar objects, rather than to describe or represent a specific order or sequence.

[0069] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, method, article or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent in these processes, methods, articles or devices / equipment.

[0070] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An input / output system interface card for an aviation simulation aircraft, characterized in that, Comprising: A power conversion unit configured to convert an external input voltage into multiple isolated DC voltage outputs and control power distribution; A programmable logic control unit integrating a processor core and connected to a program memory, a data exchange memory, and a device information memory; A multi-functional signal processing unit comprising multiple modules: A digital logic interface unit module for processing logic level signals with a frequency higher than a preset discrete signal frequency; A digital power output module for driving load devices requiring current amplification control; A programmable range analog input module having sampling channels with a higher input impedance than the standard; A configurable analog output module having a current output capability for driving low-impedance loads; A communication and topology management unit configured to communicate with a master device through a serial bus and implement dynamic networking and identity recognition between boards based on a single-wire topology protocol.

2. The input / output system interface card of an aviation simulation aircraft according to claim 1, characterized in that, The power conversion unit includes an on-line monitoring sub-unit, the on-line monitoring sub-unit includes an analog-to-digital converter and a serial communication interface, and the programmable logic control unit is connected to the analog-to-digital converter through the serial communication interface to collect real-time output voltage data of each path of the power conversion unit.

3. The input / output system interface card of an aviation simulation aircraft according to claim 2, characterized in that, The analog-to-digital converter in the on-line monitoring sub-unit is configured to: Synchronously sample at least three different-level voltages output by the power conversion unit to obtain sampling data; Pack and transmit the sampling data to the programmable logic control unit through the serial communication interface.

4. The input / output system interface card of an aviation simulation aircraft according to claim 1, characterized in that The multi-functional signal processing unit further includes a mixed signal extension sub-unit, and the mixed signal extension sub-unit includes: An isolated power output module for driving high-voltage loads; A power sensing input module for detecting the power supply status of a loaded device; A reconfigurable signal combination module for supporting dynamic configuration of multiple signal type interfaces.

5. An input / output system interface card for an aviation simulation aircraft according to claim 4, characterized in that, The mixed signal extension sub-unit adopts a hierarchical physical architecture and a logical binding mechanism, specifically including: A first type of extension interface group configured with multiple basic signal processing units to implement high-speed digital logic interface and power drive functions; A second type of extension interface group configured with multiple of the mixed signal extension sub-units to provide isolated power output and power sensing functions; Wherein, the units of the first type of extension interface group and the second type of extension interface group establish a dynamic routing relationship through the single-wire topology protocol to form a distributed signal network.

6. The input / output system interface card of an aviation simulation aircraft according to claim 3, characterized in that, The programmable logic control unit is configured to: Analyze the voltage data packet transmitted by the analog-to-digital converter, and when a voltage anomaly is detected, trigger an overvoltage protection instruction or an undervoltage protection instruction to the power conversion unit.

7. An input / output system interface card for an aviation simulation aircraft according to claim 2, characterized in that, The serial communication interface is a synchronous half-duplex serial bus, and it includes: A clock signal line driven by the programmable logic control unit; A data signal line for realizing bidirectional data transmission.

8. The input / output system interface card of an aviation simulation aircraft according to claim 1, characterized in that The power conversion unit accesses the main power supply through a multi-pin connector, generates a composite power output including positive and negative dual-channel operational voltages, multi-level DC voltages, and isolated drive voltages, and real-time monitors the status of each power supply through an analog-to-digital converter controlled by the programmable logic control unit.

9. An input / output system interface card for an aviation simulation aircraft according to claim 1, characterized in that, The input / output system interface card is applied to the signal interaction system of a flight simulator and is used for: Establishing an adaptive signal channel between a simulation computer and flight components; Implement dynamic power management for cockpit equipment; Generate device control signals with adjustable sub-region density.

10. A dynamic configuration method for an input / output system interface card of an aviation simulation aircraft, based on the input / output system interface card of an aviation simulation aircraft according to any one of claims 1-9, characterized in that, Reconstruct the port function combination in real time through the programmable logic control unit, and select the working mode according to the interaction requirements of the flight simulation panel; the working modes include: The first working mode, activating the basic signal processing function to process digital logic signals, digital power drive signals, and conventional analog input / output signals; The second working mode, activating the enhanced signal processing function to support isolated high-voltage drive, power status sensing, and scalable mixed-signal interfaces; Based on the predefined cascaded topology communication protocol, perform dynamic identity recognition and resource allocation for multiple cascaded interface cards, and establish a distributed signal routing network across the boards; Among them, the digital logic signals are bound to the interface cards operating in the first working mode, and the isolated power signals are bound to the interface cards operating in the second working mode.

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