Signal generation circuit and signal simulation generator for airborne electromechanical system

Abstract

The invention discloses a signal generation circuit and a signal simulation generator for an airborne electromechanical system. The signal generation circuit comprises a control drive circuit, a voltage conversion circuit, a power load simulation circuit and a power panel, the control drive circuit is used for realizing coordinated control on the voltage conversion circuit and the power load simulation circuit; the voltage conversion circuit is used for receiving a control instruction of the driving control circuit, dynamically adjusting an internal back-to-back electronic switch, and realizing dynamic tracking of a preset voltage value so as to simulate voltage signal output; and the power load simulation circuit is used for receiving the control instruction of the driving control circuit, dynamically adjusting the conduction degree of the field effect transistor and realizing simulation power load output. The signal generation circuit can realize simulation of discrete input signals, analog input signals and power distribution output signals, and has the advantages of small size, high integration level, flexible configuration, convenience in single-board test and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of aviation analog signal generators, and particularly relates to a signal generation circuit and a signal simulation generator for an airborne electromechanical system. Background Art

[0002] With the continuous development of avionics equipment technology, the airborne electromechanical system is developing from discrete single subsystem control towards electromechanical integrated control. As an important execution terminal of electromechanical integrated control, the Remote Interface Unit (hereinafter referred to as RIU) needs to identify, collect and process various sensor signals of the electromechanical system in large numbers, and at the same time needs to output control instructions to various actuators of the electromechanical system. Typical sensor signals include two categories: discrete signals and analog signals. Among them, discrete signals include two types: 28V / open and ground / open, and analog input signals include sine wave frequency signals, 0~32V voltage input, and 0~10V voltage input; power distribution output signals include three types: 28V / 1A, 28V / 3A, and 28V / 5A. During the development process of RIU finished products, special testing equipment is often required to simulate the above various signals to test the functions and performance indicators of RIU interface signal processing. The special testing equipment is large in volume, expensive, and not easy to move, suitable for testing RIU finished products after the technical state is solidified, and not suitable for use in the single-board function and performance testing stage.

[0003] Currently, most common signal generation circuits are for one or a type of signal. However, the testing of remote interface units requires the simulation of different types and different kinds of signals, and the corresponding signal generation circuits required are also different. The existing solutions cannot achieve the sharing of signal generation circuits for different types of signals. Secondly, the signals generated by existing signal generation circuits are often digital signals, without load-carrying capacity, and there is no signal generation circuit specifically for sharing multi-type power signals of airborne electromechanical systems. Therefore, in order to meet the board-level testing requirements during the development process of remote interface unit finished products, it is necessary to design a signal generation circuit for simulating multiple types of signals of airborne electromechanical systems.

[0004] For example, Chinese Patent CN103684263A discloses a method for implementing a simple mixed signal generator based on a single-chip microcomputer, which can output chaotic pseudo-random signals, sine signals, square wave signals, triangular waves and sawtooth wave signals, and can output various analog signals, but cannot simulate signals such as 28V / open, ground / open, and power load simulation.

[0005] Jiang Ming proposed a multi-functional signal generator controlled by a single-chip microcomputer, which can be used to generate sine waves, triangular waves, square waves, sawtooth waves, etc. This signal generator has functional components such as a power supply, a keyboard, a display, and storage, and belongs to a special instrument. (Jiang Ming. Multi-functional Signal Generator Controlled by Single-chip Microcomputer [D]. Jilin University, 2005. DOI: CNKI: CDMD: 2.2005.013559.) However, the implementation of the system functions is relatively complex. In addition, the signal types generated by the signal generator are all digital signals, without load-carrying capacity, and cannot simulate signals such as 28V / open, ground / open, and power load simulation. Summary of the Invention

[0006] The purpose of the present invention is to provide a signal generation circuit and a signal simulation generator for an airborne electromechanical system, aiming to solve the above problems.

[0007] The present invention is mainly realized through the following technical solutions: A signal generation circuit for an airborne electromechanical system includes a control and drive circuit, a voltage conversion circuit, a power load simulation circuit, and a power supply board; the control and drive circuit is respectively connected to the voltage conversion circuit and the power load simulation circuit; The control and drive circuit is used to configure the signal types output by the signal simulation generator according to the content of the configuration table preset by the main control module and the single-chip microcomputer and drive the output, so as to realize the coordinated control of the voltage conversion circuit and the power load simulation circuit; The voltage conversion circuit is used to receive the control instruction of the drive control circuit, dynamically adjust the internal back-to-back electronic switch, and realize the dynamic tracking of the preset voltage value to output an analog voltage signal; The power load simulation circuit is used to receive the control instruction of the drive control circuit, dynamically adjust the conduction degree of the field effect transistor, and realize the output of an analog power load; The power supply board is used to provide the +12V and +5V working voltages required for the operation of the signal simulation generator.

[0008] To better implement the present invention, further, the control and drive circuit includes a single-chip microcomputer, a drive circuit, an error amplifier, a current sampling circuit, and a voltage sampling circuit; the single-chip microcomputer is respectively connected to the drive circuit and the error amplifier, the drive circuit is respectively connected to the voltage conversion circuit and the power load simulation circuit, the output end of the error amplifier is connected to the drive circuit, and the current sampling circuit and the voltage sampling circuit are respectively connected to the error amplifier.

[0009] To better implement the present invention, further, the control and drive circuit includes a voltage closed-loop control circuit, a current closed-loop control circuit, and an output voltage and current sampling circuit; the voltage closed-loop control circuit is used to implement the driving and dynamic regulation of the back-to-back field effect transistors in the voltage conversion circuit; the current closed-loop control circuit is used as an error amplification circuit to amplify and output the difference between the sampled value and the reference value output by the single-chip microcomputer, realizing the closed-loop control of the voltage or current signal; the output voltage and current sampling circuit includes a current sampling circuit and a voltage sampling circuit, which are used to collect the voltage value and loop current value output by the signal generation circuit.

[0010] To better implement the present invention, further, the voltage conversion circuit includes a P-channel field effect transistor V1 and a field effect transistor V2. The field effect transistors V1 and V2 are connected in a back-to-back series form to form an electronic switch; the source S of the field effect transistor V1 is connected to the source S of the field effect transistor V2, the drain D of the field effect transistor V1 is connected to the input power supply, and the drain D of the field effect transistor V2 is connected to the positive output terminal JK+ of the signal generation circuit.

[0011] To better implement the present invention, further, the voltage closed-loop control circuit includes a current limiting resistor R1, a voltage dividing resistor R2, a voltage dividing resistor R3, an optocoupler N1, a zener diode Z1, an error amplifier N2A, a feedback compensation network resistor R7, and a capacitor C1; one end of the current limiting resistor R1 is connected to the auxiliary power supply VCC, and the other end is connected to the primary side pin 1 of the optocoupler N1. The primary side pin 2 of the optocoupler N1 is connected to the output pin 1 of the error amplifier N2A. The secondary side pin 3 of the optocoupler N1 is connected to the sources S of the field effect transistors V1 and V2 in the voltage conversion circuit; one end of the voltage dividing resistor R2 is connected to the gate G of the field effect transistor V2, and the other end is connected to one end of the voltage dividing resistor R3, the secondary side pin 4 of the optocoupler N1, and the gate G of the field effect transistor V1. The other end of the voltage dividing resistor R3 is connected to the output ground JK-; one end of the capacitor C1 is connected to the feedback compensation network resistor R7, and the other end is connected to the pin 1 of the error amplifier N2A. The other end of the feedback compensation network resistor R7 is connected to the pin 2 of the error amplifier N2A. The pin 3 of the error amplifier N2A is connected to the reference voltage Vref output pin of the single-chip microcomputer.

[0012] To better implement the present invention, further, the current closed-loop control circuit includes an error amplifier N2B, a compensation network resistor R8, and a capacitor C2. One end of the capacitor C2 and one end of the resistor R8 are connected, and the other end is connected to the pin 7 of the error amplifier N2B; the compensation network resistor R8 is connected to the pin 6 of the error amplifier N2B, and the pin 5 of the error amplifier N2B is connected to the current reference Iref output pin of the single-chip microcomputer.

[0013] To better implement the present invention, further, the output voltage and current sampling circuit includes a current sampling resistor R4, a voltage sampling resistor R5, and a voltage sampling resistor R6; one end of the current sampling resistor R4 is connected to the source electrode of the field effect transistor V3 of the power load simulation circuit, and the other end is connected to the output ground JK-; one end of the voltage sampling resistor R5 is connected to the voltage sampling resistor R6, and the other end is connected to the positive output terminal JK+ of the signal output circuit, and the other end of the voltage sampling resistor R6 is connected to the output ground JK-.

[0014] To better implement the present invention, further, the power load simulation circuit includes an N-channel field effect transistor V3, one end of the field effect transistor V3 is connected to the positive output terminal JK+ of the signal generation circuit, and the other end is connected to one end of the current sampling resistor R4.

[0015] The present invention is mainly implemented through the following technical solutions: A signal simulation generator for an airborne electromechanical system includes several signal generation circuits for an airborne electromechanical system as described above. The several signal generation circuits are arranged in parallel, and the main control module is respectively connected to the several signal generation circuits.

[0016] The beneficial effects of the present invention are as follows: Through software configuration, the signal generation circuit of the present invention can simulate discrete input signals, analog input signals, and power distribution output signals, and has the advantages of small volume, high integration, flexible configuration, and convenient single-board testing. The present invention constructs an implementation scheme including the simulation of discrete signals, analog signals, and power loads, which can be applied to the board-level function and performance testing of the RIU, provides the simulation of various types of interface signals for the RIU, and according to the different signals detected by different interface conditioning channels of the RIU, through software configuration, outputs analog signals of corresponding types and amplitudes, and can flexibly adjust the output signals. Multiple types of signals share one signal generation circuit, greatly improving the integration and adaptability of the signal simulation generator, and avoiding the use of expensive special testing equipment or a large number of discrete instruments and equipment to realize the simulation of various signals required for RIU testing. Description of the Drawings

[0017] Figure 1 It is the principle block diagram of the multi-functional signal simulation generator for an airborne electromechanical system of the present invention; Figure 2 It is the circuit diagram of the multi-functional signal simulation generator for an airborne electromechanical system of the present invention; Figure 3 It is the equivalent working circuit diagram of the continuous analog voltage output working mode; Figure 4 It is the equivalent working circuit diagram of 28V / 1A, 28V / 3A, and 28V / 5A power signal simulation and ground / open discrete signal simulation; Figure 5 The principle block diagram of the application scenario for simultaneous use of a multi-channel signal generation circuit.

[0018] Wherein: 101 - control drive circuit, 11 - voltage closed-loop control circuit, 12 - current closed-loop control circuit, 13 - output voltage and current sampling circuit, 202 - voltage conversion circuit, 303 - power load simulation circuit, 404 - power supply board. Specific implementation manners

[0019] Example 1: A signal generation circuit for an airborne electromechanical system, as Figure 1 shown, includes a control drive circuit 101, a voltage conversion circuit 202, a power load simulation circuit 303, and a power supply board 404, and the circuits are interconnected through printed circuit board traces. The control drive circuit 101 is respectively connected to the voltage conversion circuit 202 and the power load simulation circuit 303, and is used to realize the coordinated control of the voltage conversion circuit 202 and the power load simulation circuit 303. The voltage conversion circuit 202 is used to simulate discrete voltage signals and output analog signals, and can be configured to provide 28V / open discrete output signals. The power load simulation circuit 303 is used to simulate power loads and output, and can be configured to provide ground / open discrete output signals. The power supply board 404 is used to provide the +12V and +5V operating voltages required for the operation of the signal simulation generator.

[0020] The present invention can be applied to the finished product board-level test of the RIU, as the required signal generation circuit. As shown in Table 1, through the software configuration table, the signal types of the signal simulation output channels can be configured as 28V / open, ground / open, frequency signals, analog voltage signals, and 28V / 1A, 28V / 3A, 28V / 5A power load simulations required for the RIU board-level test.

[0021] Preferably, the control drive circuit 101 is used to configure and drive the output of the signal types output by the signal simulation generator according to the content of the configuration table preset by the main control module and the single-chip microcomputer, and realize the simulation function of multiple types of signals. Specifically, the control drive circuit 101 includes a single-chip microcomputer, a drive circuit, an error amplifier, a current sampling circuit, and a voltage sampling circuit; the single-chip microcomputer is respectively connected to the drive circuit and the error amplifier, the drive circuit is respectively connected to the voltage conversion circuit 202 and the power load simulation circuit 303, the output end of the error amplifier is connected to the drive circuit, and the current sampling circuit and the voltage sampling circuit are respectively connected to the error amplifier. The power load simulation circuit 303 is connected to the error amplifier through the current sampling circuit, and the voltage sampling circuit is respectively connected to the positive end and the negative end of the signal interface. The single-chip microcomputer is connected to the main control module and is used to transmit CAN data.

[0022] Preferably, the voltage conversion circuit 202 is configured to receive control instructions from the drive control circuit, dynamically adjust the internal back-to-back electronic switch, achieve dynamic tracking of a preset voltage value, and generate various analog voltage values required for RIU testing. Meanwhile, through software configuration, this circuit can also be configured to output a 28V / open signal, providing the 28V / open discrete signal input required for RIU testing.

[0023] Preferably, the power load simulation circuit 303 uses a field-effect transistor as an adjustment transistor operating in the amplification state, is configured to receive control instructions from the drive control circuit, dynamically adjust the conduction degree of the field-effect transistor, and achieve simulation of the load power. Meanwhile, through software configuration, this circuit can also be configured to output a ground / open signal, providing the ground / open discrete signal required for RIU testing.

[0024] Preferably, the power supply board 404 is composed of a DC / DC converter, and is configured to convert the externally input 28V airborne bus voltage into +12V and +5V voltages required for the signal analog generation circuit to operate.

[0025] The present invention uses an MCU single-chip microcomputer as the main control unit. For different interface signal test requirements of the RIU, corresponding control logics are preset through a software configuration table, and the simulation and switching of discrete signals, analog signals, and power load signals can be conveniently achieved. Among them, the simulation of discrete signals includes 28V / open and ground / open; the simulation of analog signals includes frequency signals, 0 - 10V voltages, and 0 - 32V voltages; the simulation of power load signals includes 28V / 1A, 28V / 3A, and 28V / 5A load simulations. Different types of signals share the same signal generation circuit, simulate the actual signal characteristics of the airborne electromechanical system, and achieve the analog output of power-type signals through different control logics.

[0026] Embodiment 2: A signal generation circuit for an airborne electromechanical system, as Figure 2 shown, includes a voltage closed-loop control circuit 11, a current closed-loop control circuit 12, an output voltage and current sampling circuit 13, a voltage conversion circuit 202, and a power load simulation circuit 303. The voltage closed-loop control circuit 11 is configured to achieve the drive and dynamic adjustment of the back-to-back field-effect transistors in the voltage conversion circuit 202; the current closed-loop control circuit 12 serves as an error amplification circuit, amplifies the difference between the sampled value and the reference value and outputs it, achieving closed-loop control of voltage or current signals; the output voltage and current sampling circuit 13 is configured to collect the output voltage value and loop current value of the signal generation circuit; the voltage conversion circuit 202 is configured to achieve linear voltage transformation or be configured as an electronic switch to achieve the on / off control of the loop, and the power load simulation circuit 303 is used to simulate the power load output.

[0027] Preferably, the voltage closed-loop control circuit 11 mainly consists of a current-limiting resistor R1, an optocoupler N1, a zener diode Z1, voltage-dividing resistors R2, R3, an error amplifier N2A, and feedback compensation network resistors R7 and capacitor C1. One end of resistor R1 is connected to the auxiliary power supply VCC, and the other end is connected to the primary side pin 1 of optocoupler N1. The primary side pin 2 of optocoupler N1 is connected to the output pin 1 of error amplifier N2A. The secondary side pin 3 of optocoupler N1 is connected to the source S of field-effect transistors V1 and V2. One end of voltage-dividing resistor R2 is connected to the gate G of field-effect transistor V2, and the other end is connected to one end of voltage-dividing resistor R3, the secondary side pin 4 of optocoupler N1, and the gate G of field-effect transistor V1. The other end of voltage-dividing resistor R3 is connected to the output ground JK-. One end of capacitor C1 is connected to feedback compensation network resistor R7, and the other end is connected to pin 1 of error amplifier N2A. The other end of feedback compensation network resistor R7 is connected to pin 2 of error amplifier N2A, and pin 3 of error amplifier N2A is connected to the output pin of the microcontroller reference voltage Vref.

[0028] The working principle of the voltage closed-loop control circuit 11 is as follows: As Figure 2 shown, pin 2 of error amplifier N2A is connected to the sampled value of the output voltage of the signal generation circuit, and pin 3 of error amplifier N2A is the preset output voltage reference value of the microcontroller. The difference between the two is amplified and output by error amplifier N2A to adjust the driving current of the primary side of optocoupler N1. The primary side current is amplified by optocoupler N1, and the voltage at the connection point A of the secondary side of optocoupler N1 changes accordingly, thereby adjusting the gate-source driving voltage of field-effect transistors V1 and V2. Finally, the output voltage of the signal generation circuit is made consistent with the preset reference value, realizing the closed-loop control of the output voltage.

[0029] Preferably, the current closed-loop control circuit 12 mainly consists of an error amplifier N2B, a compensation network resistor R8, and a capacitor C2. One end of capacitor C2 and resistor R8 are connected, the other end of capacitor C2 is connected to pin 7 of error amplifier N2B, resistor R8 is connected to pin 6 of error amplifier N2B, and pin 5 of error amplifier N2B is connected to the output pin of the microcontroller current reference Iref.

[0030] The working principle of the current closed-loop control circuit 12 is as follows: Pin 6 of error amplifier N2B is connected to the sampled value of the output current, and pin 5 is connected to the preset output current reference value of the microcontroller. The difference between the two is directly driven by the field-effect transistor V3 after error amplification. By dynamically adjusting the conduction degree of field-effect transistor V3, the output loop current is adjusted to be consistent with the reference value, realizing the closed-loop control of the output current.

[0031] Preferably, the output voltage and current sampling circuit 13 is mainly composed of a current sampling resistor R4, a voltage sampling resistor R5, and a voltage sampling resistor R6. One end of the current sampling resistor R4 is connected to the source of the field effect transistor V3, and the other end is connected to the output ground. One end of the voltage sampling resistor R5 is connected to the voltage sampling resistor R6, and the other end is connected to the positive terminal JK+ of the signal output circuit. The other end of the voltage sampling resistor R6 is connected to the output ground JK-.

[0032] The working principle of the output voltage and current sampling circuit 13 is as follows: In the voltage sampling circuit, the voltage sampling resistors R5 and R6 perform series voltage division to sample the output voltage and send the sampled voltage to the voltage closed-loop control circuit 11. The current sampling resistor converts the current flowing through the loop into a voltage value proportional to the sampling resistor R4 through the sampling resistor R4, and sends the current sampling voltage value to the current closed-loop control circuit 12.

[0033] Preferably, the voltage conversion circuit 202 is mainly composed of a P-channel field effect transistor V1 and a field effect transistor V2. The source S of the field effect transistor V1 is connected to the source S of the field effect transistor V2. The drain D of the field effect transistor V1 is connected to the input power supply, and the drain D of the field effect transistor V2 is connected to the positive terminal JK+ of the signal generation circuit output.

[0034] The working principle of the voltage conversion circuit 202 is as follows: The field effect transistors V1 and V2 are connected in series back-to-back to form an electronic switch. When the signal generation circuit needs to output a continuous analog voltage, the field effect transistors V1 and V2 operate in the amplification state, equivalent to a series adjustable resistor, and continuously adjust the output voltage according to the control command of the voltage closed-loop control circuit 11 to output an analog voltage signal with the corresponding amplitude. When the signal generation circuit needs to output a 28V / open discrete signal, the field effect transistors V1 and V2 operate in the on / off state and output a 28V / open discrete signal according to the control command of the voltage closed-loop control circuit 11.

[0035] Preferably, the power load simulation circuit 303 is mainly composed of an N-channel field effect transistor V3. One end of the field effect transistor V3 is connected to the positive terminal JK+ of the signal generation circuit output, and the other end is connected to one end of the current sampling resistor R4.

[0036] The working principle of the power load simulation circuit 303: The field effect transistor V3 operates in the amplification state according to the control command of the current closed-loop control circuit 12, equivalent to an adjustable resistor, and simulates the required external load power.

[0037] Preferably, as Figure 3As shown, it outputs for sine wave frequency signals, 0 - 32V voltage signals, 0 - 10V voltage signals, and 28V / on discrete voltage signals. The voltage reference signal Vref is generated by the internal ADC of the single-chip microcomputer. The error amplifier N2A compares the sampled value of the output voltage with the reference voltage value in real time, and adjusts the current value of the secondary side of the optocoupler N1 through the error-amplified output voltage, thereby changing the gate-source voltage of the field-effect transistors V1 and V2. The field-effect transistors act as regulating transistors, and by adjusting the voltage drop across their two ends, the output voltage value is stabilized to be consistent with the reference value, realizing the closed-loop regulation control of the output voltage. When it needs to be configured as a 28V / on discrete output, by setting the threshold value of the Vref reference value, the field-effect transistors V1 and V2 can be controlled to work in the on / off state. When the Vref reference threshold is set to be high relative to the sampled value, the output of the error amplifier N2A is constantly high, and the field-effect transistors V1 and V2 are saturated and conducting, and the signal generation circuit outputs a 28V voltage; when the Vref reference threshold is set to zero relative to the sampled value, the output of the error amplifier N2A is constantly low, and the field-effect transistors V1 and V2 are cut off, and the output of the signal generation circuit is an open circuit.

[0038] Preferably, as Figure 4 shown, where the current reference value Iref is generated by the internal ADC of the single-chip microcomputer. The error amplifier N2B compares the sampled value of the output current with the reference current value in real time, and adjusts the gate-source voltage of the field-effect transistor V3 through the error-amplified output voltage, thereby changing the equivalent conduction impedance of the field-effect transistor V3, controlling the output loop current value to be consistent with the reference value, and realizing the closed-loop control of the output current. When it needs to be configured as a ground / on discrete output, by setting the threshold value of the Iref reference value, the field-effect transistor V3 can be controlled to work in the on / off state. When the Vref reference threshold is set to be high relative to the sampled value, the output of the error amplifier N2B is constantly high, and the field-effect transistor V3 conducts to ground, and the signal generation circuit outputs a ground signal; when the Vref reference threshold is set to zero relative to the sampled value, the output of the error amplifier N2B is constantly low, and the field-effect transistor V3 is cut off, and the output of the signal generation circuit is an open circuit.

[0039] Embodiment 3: A signal simulation generator for an airborne electromechanical system, as Figure 5 shown, includes several signal generation circuits for the above-mentioned airborne electromechanical system. The several signal generation circuits are arranged in parallel, and the main control module is respectively connected to the several signal generation circuits. The signal generation circuit adopts a modular design, and the number of modules is configured according to the number of signal paths required for RIU interface signal testing. To meet the RIU testing requirements of different positions, a configurable design based on a configuration table is adopted. By loading a preset configuration table, on the basis of the hardware state of the same signal generation circuit, the flexible configuration of the output signal of the signal generation circuit can be realized. The information of the software configuration table is shown in Table 1.

[0040] For the test requirements of RIU channel signals at different positions, the single-chip microcomputer receives the position instructions sent by the RIU, automatically determines the interface type and signal amplitude of the signal output by the signal generation circuit that needs to be loaded with the configuration table, configures them, and after calling the underlying driver to complete all signal output settings, it can enter normal operation. The same hardware state can adapt to the RIU interface signal test requirements at different positions.

[0041] Table 1 The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A signal generation circuit for an airborne electromechanical system, characterized in that, It includes a control drive circuit (101), a voltage conversion circuit (202), a power load simulation circuit (303), and a power supply board (404); the control drive circuit (101) is respectively connected to the voltage conversion circuit (202) and the power load simulation circuit (303); The control drive circuit (101) is used to configure and drive the output of the signal type output by the signal simulation generator according to the content of the configuration table preset by the main control module and the single-chip microcomputer, so as to realize the coordinated control of the voltage conversion circuit (202) and the power load simulation circuit (303); The voltage conversion circuit (202) is used to receive the control instruction of the drive control circuit, dynamically adjust the internal back-to-back electronic switch, and realize the dynamic tracking of the preset voltage value to simulate the output of the voltage signal; The power load simulation circuit (303) is used to receive the control instruction of the drive control circuit, dynamically adjust the conduction degree of the field effect transistor, and realize the simulation of the power load output; The power supply board (404) is used to provide the +12V and +5V working voltages required for the operation of the signal simulation generator.

2. The signal generation circuit for an airborne electromechanical system according to claim 1, wherein The control drive circuit (101) includes a single-chip microcomputer, a drive circuit, an error amplifier, a current sampling circuit, and a voltage sampling circuit; the single-chip microcomputer is respectively connected to the drive circuit and the error amplifier, the drive circuit is respectively connected to the voltage conversion circuit (202) and the power load simulation circuit (303), the output end of the error amplifier is connected to the drive circuit, and the current sampling circuit and the voltage sampling circuit are respectively connected to the error amplifier.

3. The signal generation circuit for an airborne electromechanical system according to claim 2, wherein The control drive circuit (101) includes a voltage closed-loop control circuit (11), a current closed-loop control circuit (12), and an output voltage and current sampling circuit (13); the voltage closed-loop control circuit (11) is used to realize the drive and dynamic adjustment of the back-to-back field effect transistor in the voltage conversion circuit (202); the current closed-loop control circuit (12) is used as an error amplification circuit to amplify and output the difference between the sampling value and the reference value output by the single-chip microcomputer, so as to realize the closed-loop control of the voltage or current signal; the output voltage and current sampling circuit (13) includes a current sampling circuit and a voltage sampling circuit, and is used to collect the voltage value and the loop current value output by the signal generation circuit.

4. The signal generating circuit for an airborne electromechanical system according to claim 3, wherein The voltage conversion circuit (202) includes a P-channel field effect transistor V1 and a field effect transistor V2. The field effect transistor V1 and the field effect transistor V2 are connected in series in a back-to-back manner to form an electronic switch; the source S of the field effect transistor V1 is connected to the source S of the field effect transistor V2, the drain D of the field effect transistor V1 is connected to the input power supply, and the drain D of the field effect transistor V2 is connected to the positive output end JK+ of the signal generation circuit.

5. The signal generating circuit for an airborne electromechanical system according to claim 4, characterized in that, The voltage closed-loop control circuit (11) includes a current-limiting resistor R1, a voltage-dividing resistor R2, a voltage-dividing resistor R3, an optocoupler N1, a voltage-regulating diode Z1, an error amplifier N2A, a feedback compensation network resistor R7, and a capacitor C1. One end of the current-limiting resistor R1 is connected to the auxiliary power supply VCC, and the other end is connected to the primary side pin 1 of the optocoupler N1. The primary side pin 2 of the optocoupler N1 is connected to the output pin 1 of the error amplifier N2A. The secondary side pin 3 of the optocoupler N1 is connected to the source S of the field-effect transistors V1 and V2 of the voltage conversion circuit (202). One end of the voltage-dividing resistor R2 is connected to the gate G of the field-effect transistor V2, and the other end is connected to one end of the voltage-dividing resistor R3, the secondary side pin 4 of the optocoupler N1, and the gate G of the field-effect transistor V1. The other end of the voltage-dividing resistor R3 is connected to the output ground JK-. One end of the capacitor C1 is connected to the feedback compensation network resistor R7, and the other end is connected to the pin 1 of the error amplifier N2A. The other end of the feedback compensation network resistor R7 is connected to the pin 2 of the error amplifier N2A. The pin 3 of the error amplifier N2A is connected to the reference voltage Vref output pin of the single-chip microcomputer.

6. The signal generation circuit for an airborne electromechanical system according to claim 3, characterized in that The current closed-loop control circuit (12) includes an error amplifier N2B, a compensation network resistor R8, and a capacitor C2. One end of the capacitor C2 and one end of the resistor R8 are connected, and the other end is connected to the pin 7 of the error amplifier N2B. The compensation network resistor R8 is connected to the pin 6 of the error amplifier N2B. The pin 5 of the error amplifier N2B is connected to the current reference Iref output pin of the single-chip microcomputer.

7. The signal generating circuit for an airborne electromechanical system according to claim 3, wherein The output voltage and current sampling circuit (13) includes a current sampling resistor R4, a voltage sampling resistor R5, and a voltage sampling resistor R6. One end of the current sampling resistor R4 is connected to the source of the field-effect transistor V3 of the power load simulation circuit (303), and the other end is connected to the output ground JK-. One end of the voltage sampling resistor R5 is connected to the voltage sampling resistor R6, and the other end is connected to the positive output terminal JK+ of the signal output circuit. The other end of the voltage sampling resistor R6 is connected to the output ground JK-.

8. The signal generation circuit for an airborne electromechanical system according to claim 7, characterized in that, The power load simulation circuit (303) includes an N-channel field-effect transistor V3. One end of the field-effect transistor V3 is connected to the positive output terminal JK+ of the signal generation circuit, and the other end is connected to one end of the current sampling resistor R4.

9. A signal simulation generator for an airborne electromechanical system, characterized in that, It includes several signal generation circuits for an airborne electromechanical system as described in any one of claims 1-8. The several signal generation circuits are arranged in parallel, and the main control module is respectively connected to the several signal generation circuits.

Images