Short-time power failure simulation system and method with wide voltage output

Abstract

The invention relates to a short-time power failure simulation system and method with wide voltage output. The short-time power failure simulation system comprises an ARM chip, a voltage conversion circuit, an improved push-pull circuit, an MOS drive circuit, a two-way magnetic coupling isolator and a serial port circuit. The input end of the ARM chip is connected with the serial port circuit, and the ARM chip is used for analyzing the power-down time and outputting a control signal after receiving a user instruction through the serial port circuit; the output end of the ARM chip is connected with the MOS driving circuit, and the MOS driving circuit is used for simulating system slope power failure under the action of a control signal; the output end of the ARM chip is further connected with an improved push-pull circuit, the improved push-pull circuit is used for simulating quick power failure of the system under the action of a control signal, and the output voltage is basically equal to the input voltage. According to the invention, the power-down time is adjustable, and microsecond-level power-down can be simulated at the shortest time.

Description

Technical Field

[0001] The invention belongs to the technical field of rotating inertial navigation system measurement, and relates to a short-time power-off simulation system and method, in particular to a short-time power-off simulation system and method which adopts an improved push-pull circuit to output a wide voltage. Background Art

[0002] In a rotary inertial navigation system, conductive rings are usually used to transmit internal and external shaft signals and power supply. After long-term use, the conductive rings may fall off and cause short circuits and poor contact and open circuits due to wear between the contact points. Therefore, the system may experience short-term power outages during rotation. This power outage is generally divided into two situations: a sudden drop in voltage to near zero or a drop at a certain speed (hereinafter referred to as ramp power off), usually in microseconds.

[0003] Since the faults caused by the conductive ring are random and difficult to reproduce, this situation needs to be taken into account when reproducing and troubleshooting system faults and when designing systems, lines or programs. It is necessary to simulate this situation to reproduce the problem or examine the ability of the system, line and program to resist short-term power failures.

[0004] At present, when a system or module is tested for short-term power failure, manual power failure or control of the enable end of the power supply module by a controller is often used. The power failure time of this method is generally long, mostly in milliseconds. In most cases, the short-term power failure phenomenon in the system cannot be reproduced, and the scope of application is narrow. Usually, the output voltage cannot be adjusted.

[0005] After searching, no public documents of the prior art identical or similar to the present invention were found. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and to propose a short-term power-off simulation system and method with a wide voltage output. The power-off time is adjustable, and the shortest power-off that can be simulated is in the microsecond level. In addition, the output voltage is basically equal to the input voltage, and the applicable test scenarios are more extensive.

[0007] The present invention solves the practical problem by adopting the following technical solutions:

[0008] A short-time power-off simulation system with wide voltage output includes an ARM chip, a voltage conversion circuit, an improved push-pull circuit, a MOS drive circuit, a dual-channel magnetic coupling isolator and a serial port circuit;

[0009] The ARM chip is connected to the serial port circuit with the input end, and is used to analyze the power-off time and output a control signal after receiving a user instruction through the serial port circuit;

[0010] The output end of the ARM chip is connected to a MOS drive circuit, and the MOS drive circuit is used to simulate a system ramp power-down under the action of a control signal;

[0011] The output end of the ARM chip is also connected to an improved push-pull circuit, which is used to simulate a rapid power-off of the system under the action of a control signal, and the output voltage is substantially equal to the input voltage;

[0012] The output end of the voltage conversion circuit is connected to the dual-channel magnetic coupling isolator and the ARM chip respectively, and is used to convert the input voltage into 5V and 3.3V voltages through the DC / DC isolation power supply module to power the magnetic coupling isolation chip and the ARM chip respectively.

[0013] Moreover, the improved push-pull circuit includes: an adjustable boost circuit and a push-pull circuit; the input end of the adjustable boost circuit is connected to an external DC power supply for boosting the external DC voltage by 4V, and the output end is connected to the push-pull circuit for ensuring reliable conduction of the push-pull circuit.

[0014] Moreover, the serial port pin of the ARM chip is connected to the RS422 chip in the serial port circuit, converting the TTL level signal into a differential signal. The ARM chip leads to two control pins respectively connected to the two input ends of the dual-channel magnetic coupling isolator. The control signal is magnetically isolated, and the output end b1 of the magnetic coupling isolation is connected to the positive electrode of the diode D1 in the push-pull circuit, and the output end b2 is connected to the gate of Q4 in the MOS drive circuit; the output of the adjustable boost circuit is connected to the drain of Q1 in the push-pull circuit through the resistor R3; the output 5V of the voltage conversion circuit is connected to the power supply pin of the dual-channel magnetic coupling isolator, and 3.3V is connected to the power supply pins of the ARM and RS422 chips.

[0015] Moreover, the ARM chip is connected to the MOS driving circuit and the improved push-pull circuit respectively through a magnetic coupling isolator, and is used to isolate the digital control signal from the driving voltage signal through the magnetic coupling chip. The magnetic coupling isolation chip outputs a high-level signal of 5V.

[0016] Moreover, the output of the adjustable boost circuit is connected to the drain of the NMOS tube Q1;

[0017] The output voltage is controlled by the resistors R1 and R2 connected to the FB pin. The output voltage calculation formula is:

[0018]

[0019] Where V REF =0.6, VCC_BOOST is the output of the boost circuit, R1 and R2 are the resistance values.

[0020] Moreover, the NMOS selected in the push-pull circuit is BSZ0909NS, and the turn-on voltage V GS (th) = 2V. When setting the output of the adjustable boost circuit, the output voltage must be about 4V higher than the input voltage, that is, it must meet:

[0021] VCC_BOOST-VCC_IN=4V(1.2)

[0022] Where VCC_BOOST is the boost circuit output and VCC_IN is the power input.

[0023] A short-time power-off simulation method with wide voltage output comprises the following steps:

[0024] Step 1, parameter binding: confirm the type of power failure to be simulated and the time information of power failure, and select the relevant button and input data on the host computer;

[0025] Step 2, line connection: connect the serial port to the computer port. If you choose fast power-off, connect the drain of Q3 to the positive end of the load power supply, and connect the source of Q3 to the negative end of the load power supply; if you choose ramp power-off, connect the drain of Q5 to the positive end of the load power supply, and connect the ground end of C3 to the negative end of the load power supply;

[0026] Step 3. Select the power supply: select the power input to be the same as the load voltage and connect it to the VCC_IN terminal;

[0027] Step 4, start the output: select the upper computer to confirm the send button, the system outputs the corresponding power-off signal, and starts to simulate the power-off of the rotary inertial navigation system over-conducting loop power supply.

[0028] Advantages and beneficial effects of the present invention:

[0029] 1. The present invention proposes a short-time power-off simulation system and method with wide voltage output. By improving the push-pull circuit, the input voltage can be directly controlled by low voltage, and the voltage drop of the MOS tube is small. The output voltage is basically equal to the input voltage. Combined with ARM to generate a control signal, the power-off simulation of the over-conducting loop power supply of the rotary inertial navigation system is realized. After simulation and debugging of the actual system, it is proved that this method is feasible and effective.

[0030] 2. The present invention designs a short-time power-off simulation system and method using an improved push-pull circuit for wide voltage output. The system uses an ARM chip to accept user instructions and control the power-off time, uses an improved push-pull circuit to simulate a sudden voltage drop, and uses a driving circuit composed of NMOS and PMOS to simulate a slope power-off. The system ensures reliable conduction of the MOS tube, a small voltage drop of the MOS tube, and the output voltage of the system is basically the same as the input voltage.

[0031] 3. The present invention realizes the power-off simulation of the over-conducting ring power supply of the rotary inertial navigation system, and can realize the fast power-off and ramp power-off of the us level in the shortest time, meeting different test scenarios; the improved push-pull circuit proposed in the present invention can ensure the good conduction of the MOS tube, and the tube voltage drop is small, so that the output voltage is basically equal to the input voltage; the present invention can directly control the input voltage through the low voltage of the control signal, and can realize a wide voltage output of several volts to tens of volts according to the different input voltages; the present invention can configure various parameters of the simulated power-off through the host computer, which is more convenient and has practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a system hardware circuit composition diagram of the present invention;

[0033] Figure 2 It is the adjustable boost circuit diagram of the present invention;

[0034] Figure 3 It is a push-pull circuit diagram of the present invention;

[0035] Figure 4 It is a MOS tube driving circuit diagram of the present invention;

[0036] Figure 5 It is a fast power-off simulation curve diagram of the present invention;

[0037] Figure 6 It is a slope power-off simulation curve diagram of the present invention;

[0038] Figure 7 It is the upper computer interface and function diagram of the present invention. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0040] A short-time power-off simulation system with wide voltage output, such as Figure 1 As shown, it includes an ARM chip, a voltage conversion circuit, an improved push-pull circuit, a MOS drive circuit, a dual-channel magnetic coupling isolator and a serial port circuit;

[0041] The ARM chip is connected to the serial port circuit with the input end, and is used to analyze the power-off time and output a control signal after receiving a user instruction through the serial port circuit;

[0042] The output end of the ARM chip is connected to a MOS drive circuit, and the MOS drive circuit is used to simulate a system ramp power-down under the action of a control signal;

[0043] The output end of the ARM chip is also connected to an improved push-pull circuit, which is used to simulate a rapid power-off of the system under the action of a control signal, and the output voltage is substantially equal to the input voltage;

[0044] The output end of the voltage conversion circuit is connected to the dual-channel magnetic coupling isolator and the ARM chip respectively, and is used to convert the input voltage into 5V and 3.3V voltages through the DC / DC isolation power supply module to power the magnetic coupling isolation chip and the ARM chip respectively;

[0045] In this embodiment, the improved push-pull circuit includes: an adjustable boost circuit and a push-pull circuit; the input end of the adjustable boost circuit is connected to an external DC power supply to boost the external DC voltage by 4V, and the output end is connected to the push-pull circuit to ensure that the push-pull circuit is reliably turned on;

[0046] In this embodiment, the serial port pin of the ARM chip is connected to the RS422 chip in the serial port circuit, and the TTL level signal is converted into a differential signal. The ARM chip leads to two control pins respectively connected to the two input ends of the dual-channel magnetic coupling isolator. The control signal is magnetically isolated, and the output end b1 of the magnetic coupling isolation is connected to the positive electrode of the diode D1 in the push-pull circuit, and the output end b2 is connected to the gate of Q4 in the MOS drive circuit; the output of the adjustable boost circuit is connected to the drain of Q1 in the push-pull circuit through the resistor R3; the output 5V of the voltage conversion circuit is connected to the power supply pin of the dual-channel magnetic coupling isolator, and 3.3V is connected to the power supply pins of the ARM and RS422 chips.

[0047] In this embodiment, the ARM chip is connected to the MOS driving circuit and the improved push-pull circuit respectively through a magnetic coupling isolator, which is used to isolate the digital control signal from the driving voltage signal through the magnetic coupling chip. The magnetic coupling isolation chip outputs a high-level signal of 5V.

[0048] In this embodiment, the output of the adjustable boost circuit is connected to the drain of the NMOS tube Q1; its output voltage is controlled by the resistors R1 and R2 connected to the FB pin, and the output voltage calculation formula is:

[0049]

[0050] Where V REF =0.6, VCC_BOOST is the output of the boost circuit, R1 and R2 are the resistance values.

[0051] In this embodiment, the NMOS selected in the push-pull circuit is BSZ0909NS, and the turn-on voltage V GS (th) = 2V. When setting the output of the adjustable boost circuit, the output voltage must be about 4V higher than the input voltage, that is, it must meet:

[0052] VCC_BOOST-VCC_IN=4V(1.2)

[0053] Where VCC_BOOST is the boost circuit output and VCC_IN is the power input.

[0054] The functions and effects of each module are further explained below:

[0055] (1) The ARM chip is mainly responsible for: 1. Receiving user instructions at the serial port and analyzing the power-off time; 2. Outputting control signals.

[0056] ARM receives user commands through the serial port, including power-down mode selection, power-down time, and start of power-down. The user-selected commands can be sent through a simple host computer, such as Figure 7 shown.

[0057] After receiving the user's instruction, ARM sets the timer parameters according to the user's instruction, and pulls down or pulls up the IO pin after the timer interrupt is generated to generate a control signal. Through ARM control, a single power-off after a delay period can be achieved, or a cyclic power-off after a delay period. ARM sends the user-set parameters and the number of power-off times to the host computer through the serial port.

[0058] (2) The voltage conversion circuit is mainly responsible for: converting the input voltage into 5V and 3.3V voltages through the DC / DC isolation power module, and providing them to the magnetic coupling isolation chip and ARM respectively.

[0059] (3) The boost circuit is responsible for: increasing the input voltage by about 4V to ensure that the NMOS is reliably turned on.

[0060] (4) The improved push-pull circuit is responsible for: under the action of the control signal, the analog system quickly powers down, and the output voltage is basically equal to the input voltage.

[0061] At present, discrete push-pull circuits are mostly composed of two triodes or MOS tubes, which are various combinations of P-type and N-type tubes. In order to avoid the risk of upper and lower tubes being turned on at the same time and reduce the difficulty of control, a structure of upper N and lower P is often adopted. However, in this structure, the control signal voltage applied to the gate is affected by the voltage on the drain of the N tube, and after the N tube is turned on, the voltage on the source of the N tube will increase, and the final output voltage will be less than the control voltage applied to the gate. In addition, the conduction state of the N tube is not ideal, and it bears a large tube voltage drop, thereby causing the N tube to heat up.

[0062] The present invention proposes a low-voltage driven push-pull circuit, which combines a boost circuit to increase the voltage applied to the gate of an NMOS tube, ensure good conduction of the MOS tube, and achieve that the output voltage is substantially the same as the voltage applied to the drain of the NMOS, thereby greatly reducing the tube voltage drop.

[0063] The circuit consists of two parts, an adjustable boost circuit and a push-pull circuit. The adjustable boost circuit is as follows Figure 2 As shown, the push-pull circuit is Figure 3 The output of the adjustable boost circuit is connected to the drain of the NMOS tube Q1.

[0064] Taking SX1038 as an example, an adjustable boost circuit is designed. The output voltage is controlled by the resistors R1 and R2 connected to the FB pin. The output voltage calculation formula is:

[0065]

[0066] Where V REF =0.6, VCC_BOOST is the output of the boost circuit, R1 and R2 are the resistance values.

[0067] The circuit connection relationship of the adjustable boost circuit is as follows Figure 2 As shown, the positive electrode of the diode D1 is connected to the 1 pin of the SX1038, and the negative electrode of D1 is connected to the output end of the boost circuit; one end of the inductor L1 is connected to the 1 pin of the SX1038, and the other end is connected to the 5 pin of the SX1038; one end of the capacitor C1 is connected to the 4 and 5 pins of the SX1038, and the other end is grounded; one end of the capacitor C2 is grounded, and the other end is connected to the output end of the boost circuit; one end of the variable resistor R1 is connected to the 3 pin of the SX1038, and the other end is grounded; one end of the variable resistor R2 is connected to the 3 pin of the SX1038, and the other end is connected to the output end of the boost circuit; and the 5 pin of the SX1038 is connected to the power input.

[0068] The NMOS selected in the push-pull circuit is BSZ0909NS, and the turn-on voltage V GS (th) = 2V. Therefore, in order to ensure reliable conduction of the MOS tube, when setting the output of the adjustable boost circuit, the output voltage must be about 4V higher than the input voltage, that is, it must meet:

[0069] VCC_BOOST-VCC_IN=4V(1.2)

[0070] Where VCC_BOOST is the boost circuit output and VCC_IN is the power input.

[0071] For a push-pull circuit, Figure 3The transistors Q1, Q2, and Q3 are all NMOS, which has the advantages of fast speed, high voltage drive, and low cost. The circuit Q1, Q2, and Q3 are BSZ0909NS, which has the advantages of good high-frequency characteristics and low noise coefficient. The model of the diode D1 is 1N4148. The Q1 tube is used to reverse the control signal and increase the voltage to VCC_BOOST to control the opening and closing of the Q2 tube. The diode D1 is used to generate a voltage drop to prevent the upper and lower tubes Q2 and Q3 from being turned on at the same time due to the simultaneous conduction of Q1 and Q2. The resistor R3 is 10kΩ and R4 is 500Ω, which are used to hinder the flow of current to adjust the voltage and current in the circuit.

[0072] The circuit connection relationship of the push-pull circuit is as follows Figure 3 As shown, the drain of the NMOS tube Q1 is connected to the resistor R3, the other end of the resistor R3 is connected to the output end of the boost circuit, the gate of Q1 is connected to the output end of the isolation circuit, and the source is grounded; the drain of the NMOS tube Q2 is connected to the input end of the power supply, the gate is connected to the drain of Q1, and the source is connected to the load; the drain of the NMOS tube Q3 is connected to the load, the gate is connected to the negative electrode of D1, and the source is grounded; the positive electrode of the diode D1 is connected to the output end of the isolation circuit, and the negative electrode is connected to the gate of Q3; one end of the resistor R4 is connected to the gate of Q3, and the other end is grounded.

[0073] When the input control signal is high level 5V, Q1 is turned on, at this time the gate voltage of Q2 is low level, Q2 is turned off; the gate voltage of Q3 is 4.3V, which is greater than the turn-on threshold voltage, Q3 is turned on, at this time the load is grounded through Q3, and the voltage can quickly drop to 0.

[0074] When the input control signal is at a low level of 0V, Q1 is turned off. At this time, the gate voltage of Q2 is VCC_BOOST, which is greater than the voltage that can ensure that Q2 can be turned on reliably; Q3 is turned off. At this time, the load is connected to VCC_IN through Q2, and the voltage can rise rapidly.

[0075] When VCC_IN = 12V, VCC_BOOST = 16V, the voltage on the load is measured. Through LTSPICE simulation, it can be seen that this solution can achieve short-term power-off at the us level, and the power-off speed is fast, such as Figure 5 shown.

[0076] (4) The MOS drive circuit is responsible for: simulating the system ramp power-down under the control signal.

[0077] Use a circuit combining PMOS and NMOS to control the output and simulate the ramp power-down. The circuit is as follows Figure 4 As shown, Q4 is NMOS, model BSZ0909NS, Q5 is PMOS, model SI7409DN, resistor R6 is 10kΩ, and the capacitance of C3 can be selected according to the required drop speed.

[0078] The connection relationship of the MOS tube drive circuit is as follows Figure 4 As shown, the drain of the NMOS tube Q4 is connected to one end of the resistor R6, the other end of R6 is connected to the power input, the gate of Q4 is connected to the output end of the isolation circuit, and the source is grounded; the source of the PMOS tube Q5 is connected to the power input, the gate is connected to the drain of Q4, and the drain is connected to the load; the capacitor C3 is connected in parallel across the load.

[0079] When the input control signal is high level 5V, Q4 is turned on. At this time, the gate voltage of Q5 is low level, Q5 is turned on, and the load is connected to VCC_IN through Q5, and the load voltage can rise quickly.

[0080] When the input control signal is at a low level of 0V, Q4 is turned off. At this time, the gate voltage of Q5 is VCC_IN. Q5 is turned off. At this time, the load is disconnected from VCC_IN, and the load voltage slopes down.

[0081] When VCC_IN = 12V, C5 = 1nF, the voltage on the load is measured. Through LTSPICE simulation, it can be seen that this solution can achieve a ramp power-down of the us level, such as Figure 6 The power-off amplitude can be adjusted by adjusting the power-off time and the capacitance of C5. The longer the power-off time and the smaller the capacitance, the greater the voltage reduction.

[0082] (5) Isolation circuit is responsible for: using a high-speed magnetic coupling chip to isolate the digital control signal from the drive voltage signal, and the chip outputs a high-level signal of 5V.

[0083] A short-time power-off simulation method with wide voltage output comprises the following steps:

[0084] Step 1, parameter binding: confirm the type of power failure to be simulated and the time information of power failure, and select the relevant button and input data on the host computer;

[0085] Step 2, line connection: connect the serial port to the computer port. If you choose fast power-off, connect the drain of Q3 to the positive end of the load power supply, and connect the source of Q3 to the negative end of the load power supply; if you choose ramp power-off, connect the drain of Q5 to the positive end of the load power supply, and connect the ground end of C3 to the negative end of the load power supply;

[0086] Step 3. Select the power supply: select the power input to be the same as the load voltage and connect it to the VCC_IN terminal;

[0087] Step 4, start the output: select the upper computer to confirm the send button, the system outputs the corresponding power-off signal, and starts to simulate the power-off of the rotary inertial navigation system over-conducting loop power supply.

[0088] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0089] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0090] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0091] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

Claims

1. A short-time power-off simulation system with wide voltage output, characterized in that: Including ARM chip, voltage conversion circuit, improved push-pull circuit, MOS drive circuit, dual-channel magnetic coupling isolator and serial port circuit; The ARM chip is connected to the serial port circuit with the input end, and is used to analyze the power-off time and output a control signal after receiving a user instruction through the serial port circuit; The output end of the ARM chip is connected to a MOS drive circuit, and the MOS drive circuit is used to simulate a system ramp power-down under the action of a control signal; The output end of the ARM chip is also connected to an improved push-pull circuit, which is used to simulate a rapid power-off of the system under the action of a control signal, and the output voltage is substantially equal to the input voltage; The output end of the voltage conversion circuit is connected to the dual-channel magnetic coupling isolator and the ARM chip respectively, and is used to convert the input voltage into 5V and 3.3V voltages through the DC / DC isolation power supply module to power the magnetic coupling isolation chip and the ARM chip respectively.

2. The short-time power-off simulation system with wide voltage output according to claim 1, characterized in that: The improved push-pull circuit includes: an adjustable boost circuit and a push-pull circuit; the input end of the adjustable boost circuit is connected to an external DC power supply for boosting the external DC voltage by 4V, and the output end is connected to the push-pull circuit for ensuring reliable conduction of the push-pull circuit.

3. The short-time power failure simulation system with wide voltage output according to claim 1, characterized in that: The serial port pin of the ARM chip is connected to the RS422 chip in the serial port circuit, and the TTL level signal is converted into a differential signal. The ARM chip leads to two control pins respectively connected to the two input ends of the dual-channel magnetic coupling isolator. The control signal is magnetically isolated, and the output end b1 of the magnetic coupling isolation is connected to the positive electrode of the diode D1 in the push-pull circuit, and the output end b2 is connected to the gate of Q4 in the MOS drive circuit; the output of the adjustable boost circuit is connected to the drain of Q1 in the push-pull circuit through the resistor R3; the output 5V of the voltage conversion circuit is connected to the power supply pin of the dual-channel magnetic coupling isolator, and 3.3V is connected to the power supply pins of the ARM and RS422 chips.

4. The short-time power failure simulation system with wide voltage output according to claim 1, characterized in that: The ARM chip is connected to the MOS drive circuit and the improved push-pull circuit respectively through a magnetic coupling isolator, and is used to isolate the digital control signal from the drive voltage signal through the magnetic coupling chip. The magnetic coupling isolation chip outputs a high-level signal of 5V.

5. The short-time power failure simulation system with wide voltage output according to claim 2, characterized in that: The output of the adjustable boost circuit is connected to the drain of the NMOS tube Q1; The output voltage is controlled by the resistors R1 and R2 connected to the FB pin. The output voltage calculation formula is: Where V REF =0.6, VCC_BOOST is the output of the boost circuit, R1 and R2 are the resistance values.

6. The short-time power failure simulation system with wide voltage output according to claim 2, characterized in that: The NMOS selected in the push-pull circuit is BSZ0909NS, and the turn-on voltage V GS (th) = 2V. When setting the output of the adjustable boost circuit, the output voltage must be about 4V higher than the input voltage, that is, it must meet: VCC_BOOST-VCC_IN=4V(1.2). Where VCC_BOOST is the boost circuit output and VCC_IN is the power input.

7. A short-time power-off simulation method with wide voltage output, characterized in that: The following steps are involved: Step 1, parameter binding: confirm the type of power failure to be simulated and the time information of power failure, and select the relevant button and input data on the host computer; Step 2, line connection: connect the serial port to the computer port. If you choose fast power-off, connect the drain of Q3 to the positive end of the load power supply, and connect the source of Q3 to the negative end of the load power supply; if you choose ramp power-off, connect the drain of Q5 to the positive end of the load power supply, and connect the ground end of C3 to the negative end of the load power supply; Step 3. Select the power supply: select the power input to be the same as the load voltage and connect it to the VCC_IN terminal; Step 4, start the output: select the upper computer to confirm the send button, the system outputs the corresponding power-off signal, and starts to simulate the power-off of the rotary inertial navigation system over-conducting loop power supply.

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