A detection platform and detection method for a servo drive circuit of a position marker

Abstract

The present invention discloses a detection platform for a position marker servo drive circuit, which includes a power supply, a switching unit, an oscilloscope and a digital multimeter, wherein the power supply includes a first DC regulated power supply and a second DC regulated power supply; the switching unit is connected to the first DC regulated power supply, the second DC regulated power supply and the position marker servo drive circuit; the switching unit includes an internally integrated differential signal forming and voltage dividing circuit and a disturbance signal source circuit, wherein the differential signal forming and voltage dividing circuit is used to simulate the angle sensor signal of the gyro demodulation of the guide head, and the disturbance signal source circuit is used to check the control circuit of the angle tracking channel; the oscilloscope and the digital multimeter are connected to the switching unit and are used to measure various response signals of the position marker servo drive circuit. The present invention ensures the positioning of faulty components during the detection of the position marker servo drive circuit, and ensures the safety and reliability of the deep repair work of the position marker servo drive circuit.

Description

Technical Field

[0001] The invention belongs to the technical field of seeker position marker control, and in particular relates to a detection platform and a detection method for a position marker servo drive circuit. Background Art

[0002] With the rapid development of modern high-tech equipment, higher requirements are put forward for missile guidance technology. The seeker is the core component of precision-guided weapons, which is used to complete the target's pre-determination, automatic search, identification and tracking. The position marker is an important component of the seeker. It is an actuator to achieve antenna stability in space and target tracking. Its performance directly affects the guidance accuracy of the seeker. The position marker is a typical complex component combining optics, machinery and electronics. The improvement of its overall performance cannot rely solely on the performance improvement of the servo mechanism. The position marker servo control system also plays an important role.

[0003] At present, the test method of the servo drive circuit of the position marker is to unite with the mechanical structure of the position marker to form a closed-loop system and test it on a special test equipment. The position marker automatic test system based on virtual instrument (Aerospace Ordnance AEROWEAPONRY, the 1st issue in 2008, February 2008, Li Ye, Zhao Yan, School of Instrument Science and Optoelectronic Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083) discloses a kind of seeker position marker system detection equipment, the position marker system test method mentioned wherein utilizes the virtual instrument technology to carry the test platform to the whole position marker system, comprises that driving circuit, gyroscope, motor and mechanical framework are tested, shortcoming is that the equipment development cost is high, the hidden fault of the circuit is not easy to find, and the position marker mechanical system, gyroscope, motor are easily damaged when the circuit breaks down simultaneously. Summary of the invention

[0004] To solve the above problems, the purpose of the present invention is to provide a detection platform for the calibrator servo drive circuit which is simple to operate and has fast detection, and at the same time to provide an effective, safe, reliable and effective detection method for the calibrator servo drive circuit, which can quickly realize the performance test of the calibrator servo drive circuit, solve the problem of locating the fault of the calibrator servo drive circuit, detect whether the performance of the calibrator servo drive circuit is normal, and provide a technical basis for maintenance personnel to troubleshoot.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] A detection platform for a servo drive circuit of a position marker includes a power supply, a switching unit, an oscilloscope and a digital multimeter, wherein:

[0007] The power supply includes a first DC regulated power supply and a second DC regulated power supply. The first DC regulated power supply is used to provide four working power supplies for the position marker servo drive circuit and two working power supplies for the adapter unit. The second DC regulated power supply provides a first working power supply for the position marker servo drive circuit and provides a second DC voltage signal required for the position marker servo drive circuit test.

[0008] The adapter unit is connected to the first DC regulated power supply, the second DC regulated power supply, and the position marker servo drive circuit; the adapter unit includes a differential signal forming and voltage dividing circuit and a disturbance signal source circuit integrated inside, the differential signal forming and voltage dividing circuit is used to simulate the angle sensor signal demodulated by the gyro of the guidance head, and the disturbance signal source circuit is used to check the control circuit of the angle tracking channel;

[0009] The oscilloscope and the digital multimeter are connected to the adapter unit and are used to measure various response signals of the servo drive circuit of the position marker.

[0010] Furthermore, the differential signal forming and voltage dividing circuit comprises a sliding rheostat RP1, an operational amplifier U1A, and an operational amplifier U1B. The excitation signal output by the position marker servo drive circuit is connected to one end of the sliding rheostat RP1 via a shielded wire, the other end of the sliding rheostat RP1 is grounded via a resistor R8, the other end and the slider end are both connected to one end of a capacitor C1, the other end of the capacitor C1 is connected to a first voltage via a resistor R1, is grounded via a resistor R2, and is connected to the non-inverting input end of the operational amplifier U1A via a resistor R9; the positive power supply end of the operational amplifier U1A is connected to the first voltage and is grounded via a capacitor C5, the inverting input end is connected to the output end via a resistor R6, And it is connected to the output end of the operational amplifier U1B via resistor R10, and the non-inverting input end is connected to the output end of the operational amplifier U1B via resistor R7; the non-inverting input end of the operational amplifier U1B is connected to the first voltage via resistor R3, grounded via resistor R4, connected to the negative power supply end and grounded via capacitor C2, the inverting input end is connected to the output end via resistor R5, and connected to the output end of the operational amplifier U1A via resistor R11; the output end of the operational amplifier U1A outputs the first differential signal via capacitor C3, and the output end of the operational amplifier U1B outputs the second differential signal via capacitor C4, and the first differential signal and the second differential signal are output to the position marker servo drive circuit.

[0011] Furthermore, the above-mentioned disturbance signal source circuit includes a sliding rheostat RP2, a sliding rheostat RP3, an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U2C, and an operational amplifier U2D. The in-phase input terminal of the operational amplifier U2A is grounded via a capacitor C6, connected to the inverting input terminal of the operational amplifier U2B via a resistor R12, connected to the output terminal via a capacitor C7 and a resistor R13 connected in series, the inverting input terminal is connected to the output terminal via a resistor R14, the inverting input terminal is connected to the slider end of the sliding rheostat RP2, the positive and negative power supply terminals are connected to the first voltage and the second voltage respectively, and the output terminal is connected to the reverse parallel diode D1 and the diode D2. One end of the sliding rheostat RP2 is connected; the non-inverting input terminal of the operational amplifier U2B is grounded, and the inverting input terminal is connected to the output terminal and the other end of the sliding rheostat RP3 via resistor R15; the non-inverting input terminal of the operational amplifier U2C is connected to the output terminal of the operational amplifier U2A via resistor R18, and grounded via resistor R19, and the inverting input terminal is connected to the slider end of the sliding rheostat RP3, one end of the sliding rheostat RP3 is grounded via resistor R16, and the other end is connected to the output terminal of the operational amplifier U2C via resistor R17; the non-inverting input terminal of the operational amplifier U2D is connected to the output terminal of the operational amplifier U2C, and the inverting input terminal is connected to the output terminal, and a low-frequency signal is output.

[0012] Furthermore, the operational amplifier U1A and the operational amplifier U1B are two operational amplifier units of a quad operational amplifier with true differential inputs.

[0013] Furthermore, the operational amplifier U2A, operational amplifier U2B, operational amplifier U2C, and operational amplifier U2D are four operational amplifier units of a quad operational amplifier with true differential inputs.

[0014] A detection method for a servo drive circuit of a position marker is implemented based on a detection platform of the servo drive circuit of the position marker, and comprises the following steps:

[0015] S1. Detection slope test method: Load the differential output signal of the differential signal forming and voltage dividing circuit into the synchronous switch detection circuit of the position marker servo drive circuit, and measure the DC voltage value output by the synchronous switch detection circuit;

[0016] S2. Angle channel decoupling capability detection method: Load the output signal of the disturbance signal source into the anti-interference circuit of the position marker servo drive circuit, measure the amplitude of the output signal in the anti-interference circuit, and reflect the angle channel decoupling capability;

[0017] S3, gyro driving ability detection method: connect a high-power resistor in series with a digital multimeter, and then connect it in series in the position marker servo drive circuit; use a high-power resistor to simulate the gyro load, load the +1V DC voltage signal output by the second DC regulated power supply to the input end of the gyro DC amplifier circuit of the position marker servo drive circuit, and measure the output current of the gyro DC amplifier circuit;

[0018] S4. Motor drive capability detection method: Load the +1V DC voltage signal output by the second DC regulated power supply to the input terminal of the motor drive circuit of the position marker servo drive circuit, and measure the output voltage of the motor drive circuit.

[0019] Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages:

[0020] The detection platform of the servo drive circuit of the position marker has a simple structure, is easy to operate, safe and reliable, and has a low manufacturing cost. The adapter unit can simulate a disturbance signal for checking the control circuit of an angle tracking channel, simulate the angle sensor signal of the seeker gyro demodulation for detecting the slope of the detection channel, simulate the angle sensor signal of the seeker gyro demodulation and the source signal of the disturbance signal of the seeker, and realize the detection of the detection slope, angle channel decoupling capability, gyro driving capability, and motor driving capability in the servo drive circuit of the position marker, thereby ensuring the positioning of faulty components during the detection of the servo drive circuit of the position marker, and ensuring the safety and reliability of the deep repair work of the servo drive circuit of the position marker, and has good promotion and application value.

[0021] The detection method of the servo drive circuit of the position marker is accurate and feasible. By simulating the gyro demodulation signal and the projectile disturbance signal and loading them into the servo drive circuit of the position marker to obtain the response signal of the servo drive circuit of the position marker, the performance test and fault location of the servo drive circuit of the position marker can be completed. The method can not only perform performance test on the servo drive circuit of the position marker, but also ensure the location of faulty components during the deep repair of the servo drive circuit of the position marker, thus well ensuring the safety and reliability of the repair work of the servo drive circuit of the position marker and meeting the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural block diagram of the detection platform of the servo drive circuit of the position marker of the present invention;

[0023] Figure 2 yes Figure 1 A schematic diagram of the layout of an embodiment of a switching unit panel;

[0024] Figure 3 yes Figure 1 The schematic diagram of the differential signal formation and voltage divider circuit of the transfer unit;

[0025] Figure 4 yes Figure 1 Schematic diagram of the disturbance signal source circuit of the switching unit. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1 As shown, the detection platform of the servo drive circuit of the position marker includes a power supply, a switching unit, an oscilloscope and a digital multimeter, wherein:

[0028] The power supply includes a first DC regulated power supply and a second DC regulated power supply. The first DC regulated power supply is used to provide +27V, -27V, +15V, -15V four-way working power supply for the position marker servo drive circuit, and provide +15V, -15V working power supply for the adapter unit; the second DC regulated power supply provides +5V working power supply for the position marker servo drive circuit, and also provides a +1V DC voltage signal required for the position marker servo drive circuit test;

[0029] The adapter unit is connected to the first DC regulated power supply, the second DC regulated power supply, and the position marker servo drive circuit; the adapter unit includes a differential signal forming and voltage dividing circuit and a disturbance signal source circuit integrated inside, the differential signal forming and voltage dividing circuit is used to simulate the angle sensor signal demodulated by the gyro of the guidance head, and the disturbance signal source circuit is used to check the control circuit of the angle tracking channel;

[0030] The oscilloscope and the digital multimeter are connected to the adapter unit and are used to measure various response signals of the servo drive circuit of the position marker.

[0031] like Figure 2 As shown, the adapter unit is connected to the position marker servo drive circuit through two pairs of 37-pin plugs and sockets. The 37-pin sockets, namely XS12 and XS13, are installed on the position marker servo drive circuit board. All input and output signals and working power supplies on the position marker servo drive circuit are connected to the oscilloscope, digital multimeter, and other devices through the adapter unit.

[0032] like Figure 3As shown, the differential signal forming and voltage dividing circuit includes a sliding rheostat RP1, an operational amplifier U1A, and an operational amplifier U1B. The excitation signal output by the position marker servo drive circuit is connected to one end of the sliding rheostat RP1 via a shielded wire, and the other end of the sliding rheostat RP1 is grounded via a resistor R8, and the other end and the slider end are both connected to one end of a capacitor C1. The other end of the capacitor C1 is connected to a first voltage +15V via a resistor R1, grounded via a resistor R2, and connected to the in-phase input terminal (pin 3) of the operational amplifier U1A via a resistor R9; the positive power supply terminal (pin 4) of the operational amplifier U1A is connected to the first voltage +15V, and grounded via a capacitor C5, the inverting input terminal (pin 2) is connected to the output terminal (pin 1) via a resistor R6, and is connected to the input terminal (pin 1) of the operational amplifier U1B via a resistor R10. The output terminal (pin 7) of the operational amplifier U1A is connected, and the non-inverting input terminal is connected to the output terminal (pin 7) of the operational amplifier U1B through a resistor R7; the non-inverting input terminal (pin 5) of the operational amplifier U1B is connected to the first voltage +15V through a resistor R3, grounded through a resistor R4, connected to the negative power supply terminal (pin 11) through a capacitor C2 and grounded, the inverting input terminal (pin 6) is connected to the output terminal (pin 7) through a resistor R5, and connected to the output terminal (pin 1) of the operational amplifier U1A through a resistor R11; the output terminal (pin 1) of the operational amplifier U1A outputs a first differential signal XO+ through a capacitor C3, and the output terminal (pin 7) of the operational amplifier U1B outputs a second differential signal XO- through a capacitor C4, and the first differential signal XO+ and the second differential signal XO- are output to the position marker servo drive circuit.

[0033] The differential signal forming and voltage dividing circuit has the following working principle: the excitation signal output by the position marker servo drive circuit is connected to the sliding rheostat RP1 via a shielded wire for amplitude reduction, and the amplitude reduced signal is sent to the in-phase input terminal of the operational amplifier U1A. The operational amplifier U1A and the operational amplifier U1B are cross-coupled to realize single-ended to differential stage conversion; by using the output of the operational amplifier U1A as the input of the operational amplifier U1B, it is used to realize symmetrical output of the differential signal, and the +15V voltage is used to set the circuit supply voltage to realize balanced symmetry of the operational amplifier. The differential signal positive output terminal XO+ and the differential signal negative output terminal XO- are connected to the pins XS13-15 and XS13-16 of the position marker servo drive circuit through the adapter unit.

[0034] The quad operational amplifier with true differential inputs mentioned above is the LM324.

[0035] like Figure 4As shown, the disturbance signal source circuit includes a sliding rheostat RP2, a sliding rheostat RP3, an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U2C, and an operational amplifier U2D. The in-phase input terminal (pin 3) of the operational amplifier U2A is grounded via a capacitor C6, connected to the inverting input terminal (pin 6) of the operational amplifier U2B via a resistor R12, connected to the output terminal (pin 1) via a capacitor C7 and a resistor R13 connected in series, the inverting input terminal (pin 2) is connected to the output terminal (pin 1) via a resistor R14, the inverting input terminal (pin 2) is connected to the slider end of the sliding rheostat RP2, the positive power supply terminal (pin 4) and the negative power supply terminal (pin 11) are connected to a first voltage of +15V and a second voltage of -15V, respectively, and the output terminal (pin 1) is connected to the sliding rheostat R via a diode D1 and a diode D2 connected in reverse parallel. One end of P2 is connected; the non-inverting input terminal (pin 5) of the operational amplifier U2B is grounded, and the inverting input terminal (pin 6) is connected to the output terminal (pin 7) and the other end of the sliding rheostat RP3 via resistor R15; the non-inverting input terminal (pin 10) of the operational amplifier U2C is connected to the output terminal (pin 1) of the operational amplifier U2A via resistor R18, and is grounded via resistor R19, and the inverting input terminal (pin 9) is connected to the slider end of the sliding rheostat RP3, one end of the sliding rheostat RP3 is grounded via resistor R16, and the other end is connected to the output terminal (pin 8) of the operational amplifier U2C via resistor R17; the non-inverting input terminal (pin 12) of the operational amplifier U2D is connected to the output terminal (pin 8) of the operational amplifier U2C, and the inverting input terminal (pin 13) is connected to the output terminal (pin 14), and a low-frequency signal of 1V / 1Hz is output.

[0036] The working principle of the disturbance signal source circuit is as follows: resistor R13, capacitor C7, resistor R12, capacitor C6 and operational amplifier U2A form a Wien bridge oscillator with an oscillation frequency of 1Hz. The RC loop composed of resistor R13 and capacitor C7 is connected between the in-phase input and output terminals of the operational amplifier U2A, effectively improving the input impedance of the operational amplifier. The oscillated signal is sent to the bridge arm composed of resistor R14, diode D1, diode D2 and sliding rheostat RP2 to stabilize the amplitude; the stable output 1V / 1Hz signal is driven by the operational amplifier U1C, transmitted to the operational amplifier U1D as a follower, and finally output to pins XS13-7 and XS13-8 of the adapter unit.

[0037] The operational amplifier U1A and the operational amplifier U1B are two operational amplifier units of a quad operational amplifier with true differential inputs.

[0038] The operational amplifier U2A, operational amplifier U2B, operational amplifier U2C, and operational amplifier U2D mentioned above are four operational amplifier units of a quad operational amplifier with true differential inputs.

[0039] A detection method for a servo drive circuit of a position marker is implemented based on the detection platform of the servo drive circuit of the position marker, and comprises the following steps:

[0040] S1. Detection slope test method

[0041] Y channel detection slope test: adjust the differential signal forming and voltage dividing circuit to make its output 200mVpp through the sliding rheostat RP1 of the differential signal forming and voltage dividing circuit, turn on the "±15V" and "+5V" power switches on the transfer unit, connect the positive output terminal XO+ of the differential signal forming and voltage dividing circuit to XS13-15 on the transfer unit through the transfer wire, connect the negative output terminal XO- to XS13-16 on the transfer unit through the wire, and detect the DC voltage output U of XS13-4 Z0 ; Adjust the differential signal formation and voltage divider circuit through the sliding rheostat RP1 of the differential signal formation and voltage divider circuit to make its output 100mVpp, and detect the DC voltage output U of XS13-4 Z1 .

[0042] Z channel detection slope test: connect the positive output terminal XO+ of the differential signal forming and voltage divider circuit to XS13-21 on the transfer unit, and connect the negative output terminal XO- to XS13-22 on the transfer unit; detect the DC output voltage U of XS13-17 Y0 and U Y1 ; Calculate the detection slope of Y and Z channels according to formula (1):

[0043]

[0044] Where:

[0045] K jY (or K jZ ) represents the detection slope of the Y channel (or Z channel);

[0046] U Y0 (or U Z0 ) indicates the DC voltage output by pin XS13-4 (or pin XS13-17) when the differential signal is 200mVpp, in mV;

[0047] U Y1 (or U Z1 ) indicates the DC voltage output by pin XS13-4 (or pin XS13-17) when the differential signal is 100mVpp, in mV;

[0048] S2. Angle channel decoupling capability detection method: Connect the output signal of the disturbance signal source circuit to the pins XS13-7 and XS13-30 on the adapter unit through wires, turn on the "±15V" and "+5V" power switches on the adapter unit, and use an oscilloscope to detect the peak-to-peak value U of the output signal of XS13-8 and XS13-29. Z ; Calculate the decoupling capability of the Y and Z channels according to formula (2):

[0049]

[0050] Where:

[0051] A Y (or A Z ) represents the Y channel (or Z channel) transfer coefficient;

[0052] U Y (or U Z ) represents the peak-to-peak value of the output signal of pin XS13-29 (or pin XS13-8), in V;

[0053] S3. Gyro driving capability detection method: connect a high-power resistor (resistance value is 22Ω) simulating the resistance of the gyro coil in series with a digital multimeter, and then connect it in series between pins X53-6 and X53-7 of the position marker servo drive circuit. Adjust the digital multimeter to the ampere range and turn on the "±27V", "±15V" and "+5V" power switches; connect the +1V voltage output by the second DC regulated power supply to pin XS12-18 of the adapter unit, adjust the potentiometer of the position marker servo drive circuit board, and make the current value of the digital multimeter -(80±8)mA; turn on the "angular velocity control command" switch on the adapter unit, and the current value of the digital multimeter should be -(40±4)mA;

[0054] S4. Motor drive capability detection method: Use short-circuit wires to short-circuit pins XS12-12, XS12-14, XS12-23 and XS12-25 on the adapter unit to the ground respectively; turn on the "±27V", "±15V" and "+5V" power switches on the adapter unit, connect the +1V voltage output by the second DC regulated power supply to XS12-13 and XS12-24, and detect the DC output voltage U of pins XS12-10 and XS12-27. Z0 ; Calculate the control slope of Y and Z channels according to formula (3):

[0055]

[0056] Where:

[0057] k CY (or k CZ) indicates that the Y channel (or Z channel) controls the slope;

[0058] U Y0 (or U Z0 ) indicates the DC output voltage of pin XS12-27 (or pin XS12-10) when the output voltage of "CH2" of DC regulated power supply II is 1V, in V;

[0059] U Y1 (or U Z1 ) indicates the DC output voltage of pin XS12-27 (or pin XS12-10) when the output voltage of "CH2" of DC regulated power supply II is -1V, in V.

[0060] The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Without departing from the spirit and scope of the present invention, all equivalent changes and modifications made within the scope of the patent application of the present invention shall fall within the scope of patent protection of the present invention.

Claims

1. A detection platform for a position marker servo drive circuit, characterized in that: It includes a power supply, a switching unit, an oscilloscope and a digital multimeter, among which: The power supply includes a first DC regulated power supply and a second DC regulated power supply. The first DC regulated power supply is used to provide four working power supplies for the position marker servo drive circuit and two working power supplies for the adapter unit. The second DC regulated power supply provides a first working power supply for the position marker servo drive circuit and provides a second DC voltage signal required for the position marker servo drive circuit test. The adapter unit is connected to the first DC regulated power supply, the second DC regulated power supply, and the position marker servo drive circuit; the adapter unit includes a differential signal forming and voltage dividing circuit and a disturbance signal source circuit integrated inside, the differential signal forming and voltage dividing circuit is used to simulate the angle sensor signal demodulated by the guidance head gyro, and the disturbance signal source circuit is used to check the control circuit of the angle tracking channel; the differential signal forming and voltage dividing circuit includes a sliding rheostat RP1, an operational amplifier U1A, and an operational amplifier U1B, the excitation signal output by the position marker servo drive circuit is connected to one end of the sliding rheostat RP1 via a shielded wire, the other end of the sliding rheostat RP1 is grounded via a resistor R8, and the other end and the slider end are both connected to one end of a capacitor C1, and the other end of the capacitor C1 is connected to the other end of the capacitor C1. One end is connected to the first voltage via resistor R1, is grounded via resistor R2, and is connected to the non-inverting input terminal of the operational amplifier U1A via resistor R9; the positive power supply terminal of the operational amplifier U1A is connected to the first voltage and is grounded via capacitor C5, the inverting input terminal is connected to the output terminal via resistor R6, and is connected to the output terminal of the operational amplifier U1B via resistor R10, and the non-inverting input terminal is connected to the output terminal of the operational amplifier U1B via resistor R7; the non-inverting input terminal of the operational amplifier U1B is connected to the first voltage via resistor R3, is grounded via resistor R4, is connected to the negative power supply terminal via capacitor C2 and is grounded, the inverting input terminal is connected to the output terminal via resistor R5, and is connected to the output terminal of the operational amplifier U1A via resistor R11; the output terminal of the operational amplifier U1A ..., and is grounded, The first differential signal is output, and the output end of the operational amplifier U1B outputs the second differential signal through the capacitor C4. The first differential signal and the second differential signal are output to the position marker servo drive circuit; the disturbance signal source circuit includes a sliding rheostat RP2, a sliding rheostat RP3, an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U2C, and an operational amplifier U2D. The in-phase input end of the operational amplifier U2A is grounded through a capacitor C6, connected to the inverting input end of the operational amplifier U2B through a resistor R12, connected to the output end through a capacitor C7 and a resistor R13 connected in series, the inverting input end is connected to the output end through a resistor R14, the inverting input end is connected to the slider end of the sliding rheostat RP2, and the positive and negative power supply ends are respectively connected to the first voltage , the second voltage, the output end is connected to one end of the sliding rheostat RP2 through the reverse parallel diodes D1 and D2; the non-inverting input end of the operational amplifier U2B is grounded, and the inverting input end is connected to the output end and the other end of the sliding rheostat RP3 through the resistor R15; the non-inverting input end of the operational amplifier U2C is connected to the output end of the operational amplifier U2A through the resistor R18, and is grounded through the resistor R19, and the inverting input end is connected to the slider end of the sliding rheostat RP3, one end of the sliding rheostat RP3 is grounded through the resistor R16, and the other end is connected to the output end of the operational amplifier U2C through the resistor R17; the non-inverting input end of the operational amplifier U2D is connected to the output end of the operational amplifier U2C, and the inverting input end is connected to the output end, and the low-frequency signal is output; The oscilloscope and the digital multimeter are connected to the adapter unit and are used to measure various response signals of the servo drive circuit of the position marker.

2. The detection platform of the servo drive circuit of the position marker according to claim 1 is characterized in that: The operational amplifier U1A and the operational amplifier U1B are two operational amplifier units of a quad operational amplifier with true differential inputs.

3. The detection platform of the servo drive circuit of the position marker according to claim 1 is characterized in that: Its operational amplifier U2A, operational amplifier U2B, operational amplifier U2C, and operational amplifier U2D are four operational amplifier units of a quad operational amplifier with true differential inputs.

4. A method for detecting a servo drive circuit of a position marker, implemented based on the detection platform of the servo drive circuit of the position marker according to any one of claims 1 to 3, characterized in that: It includes the following steps: S1. Detection slope test method: Load the differential output signal of the differential signal forming and voltage dividing circuit into the synchronous switch detection circuit of the position marker servo drive circuit, and measure the DC voltage value output by the synchronous switch detection circuit; S2. Angle channel decoupling capability detection method: Load the output signal of the disturbance signal source into the anti-interference circuit of the position marker servo drive circuit, measure the amplitude of the output signal in the anti-interference circuit, and reflect the angle channel decoupling capability; S3, gyro driving ability detection method: connect a high-power resistor in series with a digital multimeter, and then connect it in series in the position marker servo drive circuit; use a high-power resistor to simulate the gyro load, load the +1V DC voltage signal output by the second DC regulated power supply to the input end of the gyro DC amplifier circuit of the position marker servo drive circuit, and measure the output current of the gyro DC amplifier circuit; S4. Motor drive capability detection method: Load the +1V DC voltage signal output by the second DC regulated power supply to the input terminal of the motor drive circuit of the position marker servo drive circuit, and measure the output voltage of the motor drive circuit.

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