A simulated inductor circuit for testing aircraft approach door control components

Abstract

The invention discloses a simulation inductance circuit for testing an aircraft approach door control component, comprising an ARM processor module (1), an AD5543 digital-to-analog conversion module (2), a three-way relay resistance-controlled inductance module (3), a PC and a JTAG download interface module (4), an RS232 serial port communication module (5) and a power supply module (6). The ARM processor module is respectively connected to the JTAG download interface and the RS232 serial port communication module, and outputs to the digital-to-analog conversion module and the three-way relay resistance-controlled inductance module respectively. The digital-to-analog conversion module outputs to the three-way relay resistance-controlled inductance module, and the three-way relay resistance-controlled inductance module outputs to the aircraft approach door control component. The power supply module supplies power to each module. The invention sends and receives data through serial port communication software, and can accurately adjust the simulation inductance output and perform real-time control.

Description

Technical Field

[0001] The present invention relates to a simulated inductance circuit capable of accurately adjusting inductance output, and in particular to a simulated inductance circuit for testing an aircraft approach door control component. Background Art

[0002] PSCU (PN: 8-678-03) monitors, provides position and control information for aircraft approach door control systems. The CMM manual test section requires the provision of 84-channel inductance simulation capabilities and the ability to operate in the following modes: (1) near end; (2) far end; (3) open circuit; (4) short circuit; (5) single inductance test mode: a. low inductance sensor (less than 4mH); b. action / limit approach door point. It is necessary to simulate the entire process of the aircraft approach door from opening to closing or from closing to opening, which requires a dynamic simulation inductor with a range of 3-6mH and an accuracy within the range of -0.2Mh-+0.1mH to achieve automatic testing of the equipment. The key to the test performance of the entire component lies in the performance of the dynamic simulation inductor. Simulating high-precision inductors through active devices is a difficult challenge in the industry in the entire circuit design solution, and it must be dynamic, which is the difficulty among the key points. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a simulated inductor circuit for testing an aircraft approach door control component. By sending and receiving data through serial communication software, the output of the simulated inductor can be accurately adjusted to control the test in real time.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A simulated inductor circuit for testing aircraft approach door control components ( Figure 1 and Figure 2 The dotted line part) is characterized in that it includes an ARM processor module 1, an AD5543 digital-to-analog conversion module 2, a three-way relay resistance control inductance module 3, a PC and JTAG download interface module 4, an RS232 serial communication module 5 and a power supply module 6;

[0006] See also Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7, wherein: the ARM processor module 1 is respectively connected to the JTAG download interface, the PC module 4 and the RS232 serial communication module 5, and outputs to the AD5543 digital-to-analog conversion module 2 and the three-way relay resistor-controlled inductor module 3, respectively; the AD5543 digital-to-analog conversion module 2 outputs to the three-way relay resistor-controlled inductor module 3, and the three-way relay resistor-controlled inductor module 3 outputs to the aircraft approach door control component 7, and the power supply module 6 supplies power to each module respectively.

[0007] See also Figure 8 , the ARM processor module 1 includes an STM32 chip (U1), and its connection relationship is:

[0008] Port 5 is grounded via an eighth capacitor (C8), and port 6 is grounded via a tenth capacitor (C10), and a thirty-first resistor (R31) and a first crystal oscillator (Y1) are connected in parallel between the lines before the two are grounded; port 44 is grounded via a thirty-second resistor (R32), ports 24, 36, 48 and 9 are connected to an external 3.3V power supply and are grounded via parallel eleventh, twelfth, thirteenth and fourteenth capacitors (C11, C12, C13 and C14), port 7 is connected to a PC and the first port NRST of the JTAG download interface (J3), and ports 23, 35, 47 and 8 are grounded.

[0009] See also Figure 7 , Fig. 9A and Fig. 9B The three-way relay resistance-controlled inductance module includes a relay, an amplifier, a triode, a diode and a resistor, and its composition and connection relationship are as follows:

[0010] The first path: the first port of the first relay (K1) is externally connected to +5V and connected to its own 12th port and the second port of the first transistor (V1) through the negative electrode of the second diode (D2), the third port is grounded, the fourth port is externally connected to the first port of the output interface (J1), the fifth port is connected to the fourth port and the ninth port of the second relay (K2), the eighth port is connected to the third port of the first amplifier (IC1) through the twelfth resistor (R12), and the tenth port is grounded after passing through the ninth resistor (R9); the ninth port of the first relay (K1) has two branches, the first branch is connected to the third port of the third amplifier (IC3A) after passing through the twenty-fifth resistor and the twenty-sixth resistor connected in parallel, and the second branch is connected to the ground after being connected in series with the first diode (D1) and the fifth diode (D5); the second port of the first transistor (V1) is externally connected to the power supply +5V through the first resistor (R1), the first port is externally connected to the twelfth port of the STM32 chip (U1) through the fifth resistor (R5), and the third port is grounded;

[0011] Second path: the first port of the second relay (K2) is externally connected to +5V and connected to its own 12th port and the second port of the second triode (V2) through the negative electrode of the third diode (D3), the third port and its own 10th port and the fourth port of the third relay (K3) are interconnected, and the fifth port and its own 8th port and the ninth port of the third relay (K3) are interconnected; the second port of the second triode (V2) is externally connected to the power supply +5V through the second resistor (R2), the first port is externally connected to the eleventh port of the STM32 chip (U1) through the sixth resistor (R6), and the third port is grounded;

[0012] The third path: the first port of the third relay (K3) is externally connected to +5V and connected to its own 12th port and the second port of the third triode (V3) through the negative electrode of the fourth diode (D4); the third port of the third relay (K3) is connected to the eighth port of the first relay (K1) through the thirteenth resistor (R13) and the fifteenth resistor (R15) connected in parallel, the fifth port is connected to the sixteenth resistor (R16) and the eighteenth resistor (R18) connected in parallel, the eighth port is connected to the twenty-second resistor (R22) and the twenty-third resistor (R23) connected in parallel, and the tenth port is connected to the twentieth resistor (R20) and the twenty-first resistor (R21) connected in parallel; the second port of the third triode (V3) is externally connected to the power supply +5V through the third resistor (R3), the first port is externally connected to the tenth port of the STM32 chip (U1) through the sixth resistor (R6), and the third port is grounded.

[0013] See also Figure 3 and Fig.10 The power module circuit includes MIC5219 (U4) and capacitors and resistors, and the connection relationship thereof is as follows:

[0014] After the 1st and 3rd ports of MIC5219 are connected, an external power supply of +5V is connected and grounded through the 20th capacitor (C20), the 2nd port is grounded, the 4th port is grounded through the 21st capacitor (C21), and the 5th port is a 3.3V power output port and grounded through the 19th capacitor (C19) and grounded through the 33rd resistor (R33) and the fourth light-emitting diode (V4).

[0015] See also Fig.11 The 232 serial communication module includes a serial communication chip MAX232E (U3) and resistors and capacitors, and the connection relationship is as follows:

[0016] The first port of MAX232E (U3) is connected to its own third port via a sixteenth capacitor (C16), the fourth port is connected to its own fifth port via an eighteenth capacitor (C18), the second port is grounded via a fifteenth capacitor (C15), the sixth port is grounded via a seventeenth capacitor (C17), the seventh port is externally connected to the thirty-first port of the STM32 chip (U1) via a thirty-fourth resistor (R34), the eighth port is externally connected to the thirtieth port of the STM32 chip (U1) via a thirty-fifth resistor (R35), the ninth port is externally connected to the third port of the 232 interface (J2), the tenth port is externally connected to the second port of the 232 interface (J2), the fifteenth port is grounded, and the sixteenth port is connected to the power supply 3.3V and grounded via a twenty-second capacitor (C22).

[0017] See also Fig.12 The AD digital-to-analog conversion module includes an analog-to-digital chip (U2), a first amplifier (IC1), a second amplifier (IC2A and IC2B are the same amplifier), a third amplifier (IC3A), a resistor, and a capacitor, and the connection relationship thereof is as follows:

[0018] The first port, the second port and the eighth port of the analog-to-digital chip (U2) are respectively connected to the fifteenth port, the seventeenth port and the fourteenth port of the STM32 chip (U1); the third port is connected to the first port of the second amplifier (IC2A) and is connected to the third port of the second amplifier (IC2A) after passing through a fifth capacitor (C5) and a twenty-fourth resistor (R24); the fourth port is connected to the seventh port of the second amplifier (IC2B) after passing through a twenty-eighth resistor (R28) and a twenty-seventh resistor (R27); the fifth port is connected to the sixth port of the second amplifier (IC2B) and is connected to the seventh port of the second amplifier (IC2B) through a thirtieth resistor (R30) and a twenty-ninth resistor (R29); the sixth port is connected to the fifth port of the second amplifier (IC2B) and is grounded; and the seventh port is externally connected to a power supply +5V;

[0019] The first port of the second amplifier (IC2A) is connected to the third port of the second amplifier (IC2A) via a fifth capacitor (C5) and a twenty-fourth resistor (R24) connected in series, the second port and the fifth port are grounded, the third port is externally connected to the ninth port of the first relay (K1) via a twenty-fifth resistor (R25) and a twenty-sixth resistor (R26) connected in parallel, the fourth port is connected to a power supply of -15V and grounded via a seventh capacitor (C7), the seventh port is connected to the second port of the third amplifier (IC3A) via an eleventh resistor (R11) and a tenth resistor (R10) connected in series, and the eighth port is connected to a power supply of +15V and grounded via a sixth capacitor (C6);

[0020] The first port of the third amplifier (IC3A) is connected to the fourth port of the first amplifier (IC1), the fourth port is connected to the power supply -15V and grounded via the second capacitor (C2), the eighth port is connected to the power supply +15V and grounded via the third capacitor (C3), the first branch of the third port of the third amplifier (IC3A) is grounded via the fourteenth resistor (R14), and the second branch is externally connected to the eighth port of the first relay (K1) via the nineteenth resistor (R19);

[0021] The first port of the first amplifier (IC1) is connected to its own second port via an eighth resistor (R8), the second port is also connected to a power supply of +15V and is grounded via a first capacitor (C1), the third port is connected to the eighth port of the first relay (K1) via a twelfth resistor (R12), the fifth port and the sixth port are connected, the seventh port is connected to a power supply of -15V and is grounded via a fourth capacitor (C4), and the eighth port is connected to the seventh port via a seventeenth resistor.

[0022] See also Fig.13 , the output interface (J1) has the following connection relationship:

[0023] The first port of the output interface (J1) is connected to the fourth port of the first relay (K1), and the second port is grounded.

[0024] The digital-to-analog conversion module is an AD5543 digital-to-analog conversion module.

[0025] See also Fig.14 , the connection relationship of the external power interface circuit is as follows:

[0026] The first port of the external power interface (J4) is connected to a power supply of +15V, the second port and the sixth port are connected to ground, the third port is connected to a power supply of -15V, and the fourth port and the fifth port are connected to a power supply of +5V.

[0027] See also Fig.15 , the PC and JTAG download interface circuit includes a PC and JTAG download interface (J3) and a capacitor, and the connection relationship thereof is:

[0028] The first port of the PC and the JTAG download interface (J3) is connected to the seventh port of the STM32 chip (U1) and is grounded after passing through a twenty-third capacitor (C23), the second port is connected to the thirty-seventh port of the STM32 chip (U1), the third port is connected to a 3.3V power supply, the fourth port is grounded, and the fifth port is connected to the thirty-fourth port of the STM32 chip (U1).

[0029] Beneficial effects: The present invention adopts serial communication software to send and receive data, can accurately adjust the simulated inductor output, and control the test in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The system composition and functional block diagram of an embodiment of the present invention;

[0031] Figure 2 It is a block diagram of the technical solution of an embodiment of the present invention;

[0032] Figure 3 A block diagram of a power module according to an embodiment of the present invention;

[0033] Figure 4 A block diagram of a portion of a CPU (central processing unit) circuit according to an embodiment of the present invention;

[0034] Figure 5 It is a block diagram of a 232 serial port communication module according to an embodiment of the present invention;

[0035] Figure 6 1 is a block diagram of an AD digital-to-analog conversion module according to an embodiment of the present invention;

[0036] Figure 7 A block diagram of a three-way relay resistance-controlled inductance module according to an embodiment of the present invention;

[0037] Figure 8 It is a module diagram of the ARM processor STM32 according to an embodiment of the present invention;

[0038] Fig. 9A and Fig. 9B A circuit diagram of a three-way relay resistance-controlled inductance module according to an embodiment of the present invention;

[0039] Fig.10 A circuit diagram of a power module according to an embodiment of the present invention;

[0040] Fig.11 It is a 232 serial port communication module diagram of an embodiment of the present invention;

[0041] Fig.12 It is a diagram of the AD5543 digital-to-analog conversion module of an embodiment of the present invention;

[0042] Fig.13 This is a three-way relay resistance-controlled inductance module interface circuit diagram of an embodiment of the present invention;

[0043] Fig.14 An external power interface circuit diagram of an embodiment of the present invention;

[0044] Fig.15 This is a diagram of a PC and JTAG download interface according to an embodiment of the present invention.

[0045] Reference numerals in the figures refer to:

[0046] 1-ARM processor module, 2-AD5543 digital-to-analog conversion module, 3-three-way relay resistance-controlled inductance module, 4-PC and JTAG download interface module, 5-RS232 serial communication module, 6-power supply module, 7-aircraft approach door control component. DETAILED DESCRIPTION

[0047] See also Figure 1 and Figure 2 The embodiment of the present invention includes: an ARM processor module 1, an AD5543 digital-to-analog conversion module 2, a three-way relay resistance-controlled inductance module 3, a PC or JTAG download interface module 4, an RS232 serial communication module 5 and a power supply module 6.

[0048] See also Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , wherein: the ARM processor module 1 is respectively connected to the JTAG download interface, the PC module 4 and the RS232 serial communication module 5, and outputs to the AD5543 digital-to-analog conversion module 2 and the three-way relay resistor-controlled inductor module 3, respectively; the AD5543 digital-to-analog conversion module 2 outputs to the three-way relay resistor-controlled inductor module 3, and the three-way relay resistor-controlled inductor module 3 outputs to the aircraft approach door control component 7, and the power supply module 6 supplies power to each module respectively.

[0049] STM32 chip serial communication sends and receives data, digital-to-analog conversion, corresponding design STM32 module, 232 serial communication module, three-way relay control inductor output circuit, power module and JTAG download interface. Write the underlying driver code according to STM32 internal registers, serial communication, and interrupt service, and use JTAG downloader to burn the corresponding program.

[0050] Figure 2 The circuit composition and functional block diagram are shown in the figure. The part to be tested is the aircraft proximity switch control unit PSCU.

[0051] It is required that this embodiment can simulate the dynamic simulation inductance of the entire process of the aircraft approach door PSCU from opening to closing or from closing to opening, with a range of 3-6mH and an accuracy within the range of -0.2Mh-+0.1mH. Through the 232 serial port communication active device to simulate high-precision inductance, the equipment automatic testing capability can be achieved.

[0052] The technical solution of this embodiment is as follows: the ARM processor STM32 chip is used, and the chip internal registers, serial port communication, interrupt service, and digital-to-analog conversion are used for programming. The STM32 chip receives the data signal sent by RS232, performs digital-to-analog conversion on the data, controls three-way relays to realize the precise inductance output of resistance-controlled inductance, and finally sends it to the PSCU. Other circuits such as power supply use peripheral circuits such as power supply chip MIC5219.

[0053] Introduction to each functional module

[0054] The power module block diagram is as follows: Figure 3 , the MIC5219 power module inputs +5VDC and outputs +3.3VDC. +5VDC and +3.3VDC power the analog inductor circuit and other modules.

[0055] STM32 chip module CPU (ARM central processing unit) circuit part, the block diagram is as follows Figure 4 .

[0056] ARM processor uses ST (STMicroelectronics) based on Cortex TM -M3 as the core of the STM32F1 series of high-performance microcontrollers, with up to 1MB of Flash, 72MHz high-speed performance makes the digital signal controller application and rapid product development to a new level, improve the execution speed of the control algorithm and code efficiency, using its multiple AHB bus matrix and multi-channel DMA, the program uses RS232 serial port 1 to send data signals, CPU digital-to-analog conversion control, sent to the STM32 port for three-way relay circuit control bus module, so as to obtain the corresponding inductance value. Figure 7 .

[0057] RS232 uses channel 1 to send and receive serial port data, which is sent to the CPU for processing and then output to the AD5543 conversion module. The resistance output is then adjusted by controlling the three-way relays K1, K2, and K3, thereby outputting a precise inductance value that meets the design range.

[0058] Using the mainstream chip STM32 serial communication, interrupt service, and IO port control, a set of adjustable high-precision analog inductor circuit devices is designed for the aircraft proximity switch control components (such as PSCU), and the embedded STM32 serial communication automatic output test program is written through KEIL software.

[0059] The three-way relay resistance control inductance module 3 is installed in front of the interface of the aircraft approach door control component 7. The circuit of the analog inductance control system includes an ARM processor module 1, a 232 serial communication module 5, an AD5543 digital-to-analog conversion module 2, a three-way relay resistance control inductance module 4, a power module 6 and a JTAG download interface 4.

[0060] See also Figure 8 The ARM processor module includes an ARM processor chip U1, a resistor and a capacitor, and the connection relationship thereof is as follows:

[0061] The 5th port of the ARM processor STM32 chip (U1) is grounded via an eighth capacitor (C8), the 6th port is grounded via a tenth capacitor (C10), a thirty-first resistor (R31) and a first crystal oscillator (Y1) are connected in parallel between the lines before the two are grounded, the 44th port is grounded via a thirty-second resistor (R32), the 24th port, the 36th port, the 48th port and the 9th port are connected to an external 3.3V power supply and are grounded via an eleventh, twelfth, thirteenth and fourteenth capacitors (C11, C12, C13 and C14), the 7th port is connected to a PC and the first port NRST of a JTAG download interface (J3), and the 23rd port, the 35th port, the 47th port and the 8th port are grounded.

[0062] See also Figure 7 , Fig. 9A and Fig. 9B The three-way relay resistance-controlled inductance module includes three relays, a diode and a resistor, and the connection relationship thereof is as follows:

[0063] The first path: the first port of the first relay (K1) is externally connected to +5V and connected to the 12th port of the first relay (K1) and the second port of the first transistor (V1) through the cathode of the first diode (D2); the third port of the first relay (K1) is grounded; the fourth port of the first relay (K1) is externally connected to the first port of the output interface (J1); the fifth port of the first relay (K1) is connected to the fourth port and the ninth port of the second relay (K2); the eighth port of the first relay (K1) is connected to the third port of the first amplifier (IC1) through the twelfth resistor (R12); the first relay (K1) The first branch of the 9th port is connected to the 3rd port of the third amplifier (IC3A) via the 25th resistor and the 26th resistor in parallel; the second branch of the 9th port of the first relay (K1) is connected to the ground via the first diode (D1) and the fifth diode (D5) in series; the 10th port of the first relay (K1) is connected to the ground via the 9th resistor (R9); the second port of the first transistor (V1) is connected to the external power supply +5V via the first resistor (R1); the first port of the first transistor (V1) is connected to the 12th port of the STM32 chip (U1) via the fifth resistor (R5); the third port of the first transistor (V1) is grounded;

[0064] The second path: the first port of the second relay (K2) is externally connected to +5V and connected to the 12th port of the second relay (K2) and the second port of the second transistor (V2) via the third diode (D3); the third port of the second relay (K2) is connected to the 10th port of the second relay (K2) and the 4th port of the third relay (K3); the fifth port of the second relay (K2) is connected to the 8th port of the second relay (K2) and the 9th port of the third relay (K3); the second port of the second transistor (V2) is externally connected to the power supply +5V via the second resistor (R2); the first port of the second transistor (V2) is externally connected to the 11th port of the STM32 chip (U1) via the sixth resistor (R6); the third port of the second transistor (V2) is grounded;

[0065] The third path: the first port of the third relay (K3) is externally connected to +5V and connected to the 12th port of the third relay (K3) and the second port of the third transistor (V3) via the fourth diode (D4); the third port of the third relay (K3) is connected to the eighth port of the first relay (K1) via the thirteenth resistor (R13) and the fifteenth resistor (R15) in parallel; the fifth port of the third relay (K3) is connected to the eighth port of the first relay (K1) via the sixteenth resistor (R16) and the eighteenth resistor (R18) in parallel; the eighth port of the third relay (K3) is connected to the eighth port of the first relay (K1); The port is connected in parallel to the eighth port of the first relay (K1) via the twenty-second resistor (R22) and the twenty-third resistor (R23); the tenth port of the third relay (K3) is connected in parallel to the eighth port of the first relay (K1) via the twentieth resistor (R20) and the twenty-first resistor (R21); the second port of the third transistor (V3) is connected to an external power supply +5V via the third resistor (R3); the first port of the third transistor (V3) is connected to the tenth port of the STM32 chip (U1) via the sixth resistor (R6); the third port of the third transistor (V3) is grounded;

[0066] See also Figure 6 and Fig.10 The power module circuit includes MIC5219 (U1) and capacitors and resistors, and their connection relationship is:

[0067] After the 1st port and the 3rd port of MIC5219 are connected, an external power supply of +5V is connected and grounded through the 20th capacitor (C20); the 5th port is a 3.3V power output port and grounded through the 19th capacitor (C19) and grounded through the 33rd resistor (R33) and the fourth light-emitting diode (V4); the 4th port is grounded through the 21st capacitor (C21); and the 2nd port is grounded.

[0068] See also Fig.11 , 232 serial communication module includes serial communication chip U3 (MAX232E) and resistors and capacitors, and their connection relationship is:

[0069] The sixteenth port of the serial communication chip (U3) is connected to a power supply of 3.3V and is grounded via a twenty-second capacitor (C22); the seventh port and the eighth port are respectively connected to a thirty-first port and a thirty-th port of the STM32 chip (U1) via a thirty-fourth resistor (R34) and a thirty-fifth resistor (R35); the ninth port and the tenth port are respectively connected to a third port and a second port of the 232 interface (J2); the first port and the fourth port are respectively connected to a third port and a fifth port of the serial communication chip (U3) via a sixteenth capacitor (C16) and an eighteenth capacitor (C18); the second port and the sixth port are respectively grounded via a fifteenth capacitor (C15) and a seventeenth capacitor (C17); and the fifteenth port is grounded.

[0070] See also Fig.12 , AD digital-to-analog conversion module, including analog-to-digital chip (U2), first amplifier (IC1), second amplifier (IC2A and IC2B are the same amplifier), third amplifier (IC3A), resistors, capacitors, and their connection relationship is:

[0071] The first port, the second port and the eighth port of the analog-to-digital chip (U2) are respectively connected to the fifteenth port, the seventeenth port and the fourteenth port of the STM32 chip (U1); the third port is connected to the first port of the second amplifier (IC2A) and is connected to the third port of the second amplifier (IC2A) after passing through a fifth capacitor (C5) and a twenty-fourth resistor (R24); the fourth port is connected to the seventh port of the second amplifier (IC2A) after passing through a twenty-eighth resistor (R28) and a twenty-seventh resistor (R27); the fifth port is connected to the sixth port of the second amplifier (IC2A) and is connected to the seventh port of the second amplifier (IC2A) through a thirtieth resistor (R30) and a twenty-ninth resistor (R29); the sixth port is connected to the fifth port of the second amplifier (IC2A) and is grounded; and the seventh port is externally connected to a power supply +5V;

[0072] The first port of the second amplifier (IC2A) is connected to the third port of the second amplifier (IC2A) via a fifth capacitor (C5) and a twenty-fourth resistor (R24) connected in series, the second port and the fifth port are grounded, the third port is externally connected to the ninth port of the first relay (K1) via a twenty-fifth resistor (R25) and a twenty-sixth resistor (R26) connected in parallel, the fourth port is connected to a power supply of -15V and grounded via a seventh capacitor (C7), the seventh port is connected to the second port of the third amplifier (IC3A) via an eleventh resistor (R11) and a tenth resistor (R10) connected in series, and the eighth port is connected to a power supply of +15V and grounded via a sixth capacitor (C6);

[0073] The first port of the third amplifier (IC3A) is connected to the fourth port of the first amplifier (IC1), the fourth port is connected to the power supply -15V and grounded via the second capacitor (C2), the eighth port is connected to the power supply +15V and grounded via the third capacitor (C3), the first branch of the third port of the third amplifier (IC3A) is grounded via the fourteenth resistor (R14), and the second branch is externally connected to the eighth port of the first relay (K1) via the nineteenth resistor (R19);

[0074] The first port of the first amplifier (IC1) is connected to its own second port via an eighth resistor (R8), the second port is also connected to a power supply of +15V and is grounded via a first capacitor (C1), the third port is connected to the eighth port of the first relay (K1) via a twelfth resistor (R12), the fifth port and the sixth port are connected, the seventh port is connected to a power supply of -15V and is grounded via a fourth capacitor (C4), and the eighth port is connected to the seventh port via a seventeenth resistor.

[0075] See also Fig.13 , three-way relay resistance controls the inductance module output interface (J1), and its connection relationship is:

[0076] The first port of the output interface (J1) is connected to the fourth port of the first relay (K1); the second port of the output interface (J1) is grounded.

[0077] See also Fig.14 , the external power interface circuit, its connection relationship is:

[0078] The first port and the third port of the external power interface (J4) are connected to power supplies +15V and -15V respectively; the fourth port and the fifth port of the external power interface (J4) are connected to power supplies +5V; the second port and the sixth port of the external power interface (J4) are grounded.

[0079] See also Fig.15 , PC and JTAG download interface circuit, including PC and JTAG download interface (J3) and capacitor, the connection relationship of which is:

[0080] The first port of the PC and the JTAG download interface (J3) is connected to the seventh port of the STM32 chip (U1) and is grounded after passing through a twenty-third capacitor (C23); the second and fifth ports are respectively connected to the thirty-seventh and thirty-fourth ports of the STM32 chip (U1); the third port is connected to a 3.3V power supply and the fourth port is grounded.

Claims

1. A simulated inductance circuit for testing an aircraft approach door control assembly, characterized in that: It includes an ARM processor module (1), an AD5543 digital-to-analog conversion module (2), a three-way relay resistance-controlled inductance module (3), a PC and JTAG download interface module (4), an RS232 serial communication module (5) and a power supply module (6); Wherein: the ARM processor module (1) is respectively connected to a PC, a JTAG download interface module (4) and an RS232 serial communication module (5), and outputs to an AD5543 digital-to-analog conversion module (2) and a three-way relay resistor-controlled inductor module (3), the AD5543 digital-to-analog conversion module outputs to the three-way relay resistor-controlled inductor module, the three-way relay resistor-controlled inductor module outputs to an aircraft approach door control component, and a power supply module supplies power to each module; The ARM processor module (1) includes an STM32 chip (U1), and the connection relationship thereof is as follows: Port 5 is grounded via an eighth capacitor (C8), and port 6 is grounded via a tenth capacitor (C10), and a thirty-first resistor (R31) and a first crystal oscillator (Y1) are connected in parallel between the lines before the two are grounded; Port 7 is connected to PC and JTAG download interface (J3) first port NRST; Ports 8, 23, 35 and 47 are grounded; After the 9th port, the 24th port, the 36th port and the 48th port are connected to each other, they are externally connected to a 3.3V power supply and are simultaneously grounded via an eleventh capacitor (C11), a twelfth capacitor (C12), a thirteenth capacitor (C13) and a fourteenth capacitor (C14) connected in parallel; Port 44 is grounded via the thirty-second resistor (R32); The three-way relay resistance-controlled inductance module (3) comprises a relay, an amplifier, a triode, a diode and a resistor, and its composition and connection relationship are as follows: The first route: the first port of the first relay (K1) is externally connected to +5V and connected to its own 12th port and the second port of the first transistor (V1) through the negative electrode of the second diode (D2), the 3rd port is grounded, the 4th port is externally connected to the first port of the output interface (J1), the 5th port is connected to the 4th port and the 9th port of the second relay (K2), the 8th port is connected to the 3rd port of the first amplifier (IC1) through the 12th resistor (R12), and the 10th port is grounded after passing through the 9th resistor (R9). The 9th port of the first relay (K1) has two branches, the first branch is connected to the 3rd port of the second amplifier (IC2A) after passing through the 25th resistor and the 26th resistor connected in parallel, and the second branch is connected to the ground after being connected in series with the first diode (D1) and the fifth diode (D5); the second port of the first transistor (V1) is externally connected to the power supply +5V through the first resistor (R1), the first port is externally connected to the 12th port of the STM32 chip (U1) through the fifth resistor (R5), and the third port is grounded; The second route: the first port of the second relay (K2) is connected to +5V and connected to its own 12th port and the second port of the second transistor (V2) through the negative electrode of the third diode (D3), the third port and its own 10th port and the fourth port of the third relay (K3) are interconnected, and the fifth port and its own 8th port and the ninth port of the third relay (K3) are interconnected; the second port of the second transistor (V2) is connected to the external power supply +5V through the second resistor (R2), the first port is connected to the eleventh port of the STM32 (U1) through the sixth resistor (R6), and the third port is grounded; The third route: the first port of the third relay (K3) is connected to +5V and connected to its own 12th port and the second port of the third transistor (V3) through the negative electrode of the fourth diode (D4); the third port of the third relay (K3) is connected to the eighth port of the first relay (K1) through the thirteenth resistor (R13) and the fifteenth resistor (R15) connected in parallel, the fifth port is connected to the sixteenth resistor (R16) and the eighteenth resistor (R18) connected in parallel, the eighth port is connected to the twenty-second resistor (R22) and the twenty-third resistor (R23) connected in parallel, and the tenth port is connected to the twentieth resistor (R20) and the twenty-first resistor (R21) connected in parallel; the second port of the third transistor (V3) is connected to the external power supply +5V through the third resistor (R3), the first port is connected to the tenth port of the STM32 (U1) through the sixth resistor (R6), and the third port is grounded; The AD5543 digital-to-analog conversion module (2) comprises a digital-to-analog chip (U2), a first amplifier (IC1), a second amplifier (IC2A and IC2B), a third amplifier (IC3A), a resistor, and a capacitor, and the connection relationship thereof is as follows: The first port, the second port and the eighth port of the digital-analog chip (U2) are respectively connected to the fifteenth port, the seventeenth port and the fourteenth port of the STM32 chip (U1); the third port is connected to the first port of the second amplifier (IC2A) and connected to the third port of the second amplifier (IC2A) after passing through the fifth capacitor (C5) and the twenty-fourth resistor (R24); the fourth port is connected to the seventh port of the second amplifier (IC2B) after passing through the twenty-eighth resistor (R28) and the twenty-seventh resistor (R27); the fifth port is connected to the sixth port of the second amplifier (IC2B) and connected to the seventh port of the second amplifier (IC2B) through the thirtieth resistor (R30) and the twenty-ninth resistor (R29); the sixth port is connected to the fifth port of the second amplifier (IC2B) and grounded; the seventh port is connected to an external power supply +5V; The first port of the second amplifier (IC2A) is connected to its third port via the fifth capacitor (C5) and the twenty-fourth resistor (R24) connected in series, the second port and the fifth port are grounded, the third port is also connected to the ninth port of the first relay (K1) via the twenty-fifth resistor (R25) and the twenty-sixth resistor (R26) connected in parallel, the fourth port is connected to the power supply -15V and grounded via the seventh capacitor (C7), the seventh port is also connected to the second port of the third amplifier (IC3A) via the eleventh resistor (R11) and the tenth resistor (R10) connected in series, and the eighth port is connected to the power supply +15V and grounded via the sixth capacitor (C6); The first port of the third amplifier (IC3A) is connected to the fourth port of the first amplifier (IC1), the fourth port is connected to the power supply -15V and grounded through the second capacitor (C2), the eighth port is connected to the power supply +15V and grounded through the third capacitor (C3), the first branch of the third port of the third amplifier (IC3A) is grounded through the fourteenth resistor (R14), and the second branch is externally connected to the eighth port of the first relay (K1) through the nineteenth resistor (R19); The first port of the first amplifier (IC1) is connected to its own second port through the eighth resistor (R8), the second port is also connected to the power supply +15V and grounded through the first capacitor (C1), the third port is connected to the eighth port of the first relay (K1) through the twelfth resistor (R12), the fifth port and the sixth port are connected, the seventh port is connected to the power supply -15V and grounded through the fourth capacitor (C4), and the eighth port is connected to the seventh port through the seventeenth resistor.

2. The simulated inductance circuit for testing an aircraft approach door control assembly according to claim 1, characterized in that: The power module (6) includes MIC5219 (U4) and capacitors and resistors, and the connection relationship between them is as follows: After the 1st and 3rd ports of MIC5219 are connected, they are connected to an external power supply of +5V and are grounded through the 20th capacitor (C20), the 2nd port is grounded, the 4th port is grounded through the 21st capacitor (C21), and the 5th port is a 3.3V power output port and is grounded through the 19th capacitor (C19) and is grounded through the 33rd resistor (R33) and the 4th light-emitting diode (V4).

3. The simulated inductance circuit for testing an aircraft approach door control assembly according to claim 1, characterized in that: The RS232 serial communication module (5) comprises a serial communication chip MAX232E (U3) and resistors and capacitors, and the connection relationship thereof is as follows: The first port of MAX232E (U3) is connected to its own third port via the sixteenth capacitor (C16), the fourth port is connected to its own fifth port via the eighteenth capacitor (C18), the second port is grounded via the fifteenth capacitor (C15), the sixth port is grounded via the seventeenth capacitor (C17), the seventh port is connected to the thirty-first port of the STM32 chip (U1) via the thirty-fourth resistor (R34), the eighth port is connected to the thirtieth port of the STM32 chip (U1) via the thirty-fifth resistor (R35), the ninth port is connected to the third port of the 232 interface (J2), the tenth port is connected to the second port of the 232 interface (J2), the fifteenth port is grounded, and the sixteenth port is connected to the power supply 3.3V and grounded via the twenty-second capacitor (C22).

4. The simulated inductance circuit for testing an aircraft approach door control assembly according to claim 1, characterized in that: The connection relationship of the output interface (J1) is: The first port of the output interface (J1) is connected to the fourth port of the first relay (K1), and the second port is grounded.

5. The simulated inductance circuit for testing an aircraft approach door control assembly according to claim 1, characterized in that: The connection relationship of the external power interface circuit is: The first port of the external power interface (J4) is connected to the power supply +15V, the second port and the sixth port are grounded, the third port is connected to the power supply -15V, and the fourth port and the fifth port are connected to the power supply +5V.

6. The simulated inductance circuit for testing an aircraft approach door control assembly according to claim 1, characterized in that: The PC and JTAG download interface module includes the PC and JTAG download interface (J3) and capacitors, and their connection relationship is as follows: The first port of the PC and the JTAG download interface (J3) is connected to the seventh port of the STM32 chip (U1) and is grounded after passing through the twenty-third capacitor (C23), the second port is connected to the thirty-seventh port of the STM32 chip (U1), the third port is connected to a 3.3V power supply, the fourth port is grounded, and the fifth port is connected to the thirty-fourth port of the STM32 chip (U1).

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