Fault diagnosis platform and diagnosis method for introduced aviation radar electronic equipment

Abstract

The invention discloses a fault diagnosis platform and a fault diagnosis method for introduced aviation radar electronic equipment, belongs to the technical field of aviation radars, and is used for power-on detection and fault diagnosis of the introduced equipment, the fault diagnosis platform is connected with a to-be-detected product, and normal power-on detection is carried out according to a power-on time sequence. Instruments such as a frequency spectrograph and an oscilloscope are used for acquiring response signals of microwave, power supply, simulation and the like of the equipment, and fault parts are judged. A fault diagnosis platform of the equipment is designed and developed, and the blank that the introduced radar electronic equipment cannot autonomously perform power-up detection and fault diagnosis in China is filled up; by adopting the fault diagnosis method, the troubleshooting depth and the troubleshooting efficiency are improved, the repair mode that only the equipment of the type can be replaced for the whole machine is changed, the working efficiency is improved, and relatively high economic benefits are obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation radars, and in particular relates to an introduced aviation radar electronic equipment fault diagnosis platform and a diagnosis method. Background Art

[0002] In recent years, my country has introduced a certain type of radar electronic equipment. This type of equipment has a short lifespan and a high failure rate during its lifespan, which affects the use of this type of equipment. In order to improve the combat effectiveness of this type of equipment, it is urgently necessary to repair this type of equipment. Therefore, this paper studies the design of the fault location system and the fault diagnosis method to realize the repair of the equipment. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to design and build a fault diagnosis platform for imported aviation radar electronic equipment, and to provide a fault diagnosis method to solve the problem mentioned in the background technology that the imported radar electronic equipment has a high fault frequency and is difficult to locate, which affects its use.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a fault diagnosis platform for introducing aviation radar electronic equipment, first mapping the electrical interface relationship of this type of equipment, testing through the timing analysis of the input excitation signal of this type of radar electronic equipment, the function and direction analysis of the internal signal of the seeker, designing the principle block diagram of the power-on fault location platform, and independently designing and building the fault diagnosis platform; The fault diagnosis platform includes: DC regulated power supply WYK-3034B, DC regulated power supply E3631A, ADL DC combination power supply, AC power supply AN17001ST / 36, signal acquisition device, digital multimeter, digital oscilloscope and spectrum analyzer, which are used for power-on detection and signal acquisition of this type of radar electronic equipment.

[0005] A fault diagnosis platform is used to diagnose and locate faults of the radar electronic equipment. The radar electronic equipment includes a synchronizer, a master oscillator, a microwave receiver, a correction receiver, a servo circuit, a local oscillator switch, and a power supply component. Each component is connected by a cable. The fault diagnosis platform is connected to the product to be tested. The fault diagnosis platform is used to collect signals of relevant subcomponents of the aviation radar electronic equipment to determine the faulty components. The fault diagnosis platform is connected to the product to be tested through the XP26 and XT3 sockets, and the response signal and detection point of the radar electronic equipment are introduced into the signal acquisition device of the fault diagnosis platform, so that the equipment reaches a normal power-on working state, and the working performance of the main components of the equipment is detected. At the same time, all DC and AC working voltages and current consumption signals of the equipment when it is powered on are detected.

[0006] Use the fault diagnosis platform to test the power supply parameters of the aviation radar electronic equipment and check the power supply working status. If the test is qualified, it means that the basic working status of each component is normal; if the test is unqualified, check the static resistance of the XP26 and XT3 sockets and the power supply component failure; Use the fault diagnosis platform to test the output parameters of the power supply component of the avionics equipment and check the working condition of the power supply component. If the test is qualified, it means that the power supply component is working normally; if the test is unqualified, check the power supply component for faults; Use the fault diagnosis platform to detect the subcarrier frequency amplitude of the coarse control voltage Ug and fine control voltage Ut of the correction receiver of the avionics equipment. If the test voltage is qualified, it means that some circuits of the correction receiver are qualified; if the test fails, troubleshoot the correction receiver fault; Use the fault diagnosis platform to detect the frequency and amplitude of the three output signals Σ, Δ1 and Δ2 of the microwave receiver of the avionics equipment. If the signal is unqualified, it means that the microwave receiver or its front-end components (synchronizer, self-test signal device) are faulty, and the corresponding faulty parts are checked; The fault diagnosis platform is used to detect the frequency and amplitude of the first local oscillator signal Fг1, the second local oscillator signal Fг2, the detection signal Fc, the self-test signal Fkc, the clock signal FTAKT and the frequency source output signal FРИЦ output by the master oscillator of the avionics equipment. If the test is qualified, it means that the master oscillator is qualified; if the test is unqualified, it means that the master oscillator is faulty and the faulty part is checked; The fault diagnosis platform is used to detect the local oscillator input signal ВХОДFГ1, output signal ВЫХОДFГ1 and control signal УСГ1 of the local oscillator switch of the avionics equipment. If the test is qualified, it means that the local oscillator switch is qualified; if the test is unqualified, it means that the local oscillator switch is faulty and the faulty part should be checked. Use the fault diagnosis platform to detect the RF switch and IF switch signals of the synchronizer of the avionics equipment. If the test is qualified, it means that the synchronizer is qualified; if the test is unqualified, it means that the synchronizer is faulty and the faulty parts should be checked. The fault diagnosis platform is used to detect the gyro excitation signal of the servo drive circuit of the position marker of the avionics equipment. If the test is qualified, it means that the servo drive circuit of the position marker is qualified; if the test is unqualified, it means that the servo drive circuit of the position marker is faulty and the faulty part should be checked.

[0007] The beneficial effects of the present invention are: filling the gap that the imported radar electronic equipment cannot be powered on and tested and fault diagnosed independently in China, and the troubleshooting method can detect more than 60% of the fault modes of the equipment; The troubleshooting depth can be greatly improved, changing the repair mode of only replacing the whole machine, which improves work efficiency, achieves higher economic benefits, and ensures the product delivery cycle; The independently designed fault diagnosis platform and developed troubleshooting process have effectively shortened the equipment fault location time, while also improving the fault location depth and accuracy, shortening the average fault location and repair time by more than 50%. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of building a fault diagnosis platform of the present invention.

[0009] Figure 2 The present invention is a flow chart of the radar electronic equipment fault diagnosis method.

[0010] Figure 3 It is a schematic diagram of the signal acquisition device of the present invention. DETAILED DESCRIPTION

[0011] The technical solution of the present invention will be described clearly and completely below in conjunction with the drawings of this specification. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] First, the electrical interface relationship of the radar electronic equipment is mapped, and the test is carried out by analyzing the timing of the input excitation signal of the radar electronic equipment, analyzing the function and direction of the internal signal of the seeker, designing the principle block diagram of the power-on fault positioning platform, and independently designing and building a fault diagnosis platform. Through the independently designed and built fault diagnosis platform, the radar electronic equipment is powered on. The power supply components of the fault diagnosis platform include DC regulated power supply WYK-3034B, DC regulated power supply E3631A, ADL DC combination power supply and AC power supply AN17001ST / 36, among which: DC regulated power supply E3631A provides +27V "preheating" power supply and control relay connection and shutdown for the components containing crystal oscillator of radar electronic equipment through XP26 cable; AC power supply A N17001ST / 36 provides 36V / 1000Hz working power for the inertial devices of the radar electronic equipment through the XP26 cable; the DC regulated power supply WYK-3034B provides +16V power for the high-voltage conversion components of the radar electronic device through the XP26 cable connector; the ADL DC combined power supply provides ±9V, ±27V, +18V and +16V working power for the secondary power supply components of the radar electronic device through the XP26 cable and XT3 connector to complete the power-on detection of the radar electronic equipment; after checking and confirming various instructions, excitation signals, and power supplies, the response signals of each major component are detected in real time according to the signal flow of the equipment, and finally the fault is located, filling the gap that this type of radar equipment cannot be independently powered on and tested. Embodiment 1:

[0013] like Figure 1 As shown, the fault diagnosis platform designed and developed in the embodiment of the present invention is used for power-on detection of the aviation radar electronic equipment. The radar electronic equipment is composed of multiple subassemblies, which are connected to the platform through XP26 and XT3 cables. Instruments such as digital oscilloscopes and spectrum analyzers are used to collect signals from the equipment interface and each subassembly to determine the faulty component.

[0014] The equipment and platform Figure 2 After connecting and powering on according to the timing, the DC regulated power supply and AC power supply will display the real-time values ​​of all the power supply voltage and current consumption of the avionics. If the test is qualified, it means that the power supply of the equipment is normal; if the test fails, check the static resistance of the XP26 and XT3 sockets and the secondary power supply failure. Embodiment 2:

[0015] On the basis of Example 1, Figure 2 As shown, when the avionics equipment is powered on, a digital oscilloscope is used to detect the amplitude and period of the synchronizer switch signal and the self-test signal. If the signal amplitude and period meet the requirements, it means that the synchronizer is qualified; if the test fails, the synchronizer fault is checked. Embodiment 3:

[0016] On the basis of Example 1, Figure 2 As shown, the avionics equipment is powered on for inspection, and the frequencies and amplitudes of the first local oscillator signal Fг1, the second local oscillator signal Fг2, the detection signal Fc, the self-test signal Fkc, the clock signal FTAKT, the frequency source output signal FРИЦ and other signals output by the master oscillator are detected with a spectrum analyzer. If the test is qualified, it means that the master oscillator is qualified; if the test is unqualified, it means that the master oscillator is faulty and the faulty component should be checked. Embodiment 4:

[0017] On the basis of Example 1, Figure 2 As shown, the local oscillator input signal ВХОДFГ1, output signal ВЫХОДFГ1 and control signal УСГ1 of the local oscillator switch of the spectrum analyzer are used for detection; if the test is qualified, it means that the local oscillator switch is qualified; if the test is unqualified, it means that the local oscillator switch is faulty and the faulty part should be checked. Embodiment 5:

[0018] On the basis of Example 1, Figure 2 As shown, use an oscilloscope to detect the gyro excitation signal of the position marker servo drive circuit; if the test is qualified, it means that the position marker servo drive circuit is qualified; if the test is unqualified, it means that the position marker servo drive circuit is faulty, and the faulty part should be checked. Embodiment 6:

[0019] On the basis of Example 1, Figure 2 As shown, use a spectrum analyzer to detect the frequency and amplitude of the three output signals Σ, Δ1 and Δ2 of the microwave receiver; if the signal is unqualified, it means that the microwave receiver or its front-stage components (synchronizer, self-test signal device) are faulty, and the corresponding faulty parts should be checked.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0021] Parts of the present invention not described in detail are prior art.

Claims

1. A fault diagnosis platform for introducing aviation radar electronic equipment, characterized by: The fault diagnosis platform includes: DC regulated power supply WYK-3034B, DC regulated power supply E3631A, ADL DC combination power supply, AC power supply AN17001ST / 36, signal acquisition device, digital multimeter, digital oscilloscope and spectrum analyzer, which are used for power-on detection and signal acquisition of radar electronic equipment; The DC regulated power supply WYK-3034B, the DC regulated power supply E3631A, the ADL DC combined power supply and the AC power supply AN17001ST / 36 are respectively connected to the signal acquisition device, and are connected to the radar electronic equipment through signal acquisition to provide it with DC and AC of different voltages; the signal acquisition device is respectively connected with a digital multimeter, a digital oscilloscope and a spectrum analyzer, the digital multimeter is used to detect the voltage and current, the digital oscilloscope is used to detect the envelope and amplitude of the subcarrier signal of the correction channel receiver, and the spectrum analyzer is used to analyze the collected signal.

2. The fault diagnosis platform for imported aviation radar electronic equipment according to claim 1 is characterized in that: The fault diagnosis platform realizes fault diagnosis and positioning for radar electronic equipment, and the radar electronic equipment includes: a synchronizer, a master oscillator, a microwave receiver, a servo circuit, a correction receiver, a local oscillator switch and a power supply component, and the above components are connected by cables; The fault diagnosis platform is connected to the radar electronic equipment, and the fault diagnosis platform is used to collect signals from relevant subcomponents of the radar electronic equipment to determine the faulty components. The fault diagnosis platform is connected to the radar electronic equipment through XP26 and XT3 sockets, and the response signals and detection points of the radar electronic equipment are introduced into the signal acquisition device of the fault diagnosis platform, so that the radar electronic equipment reaches a normal power-on working state, and the working performance of each component of the radar electronic equipment is detected. At the same time, all DC and AC working voltages and current consumption signals of the radar electronic equipment when it is powered on are detected.

3. A diagnostic method based on a fault diagnosis platform for introducing aviation radar electronic equipment according to any one of claims 1 to 2, comprising the following steps: Step 1: Use the fault diagnosis platform to test the power supply parameters of the radar electronic equipment and check the power supply working condition. If the test is qualified, it means that the basic working condition of each component is normal, and proceed to the next step; If the test fails, check the static resistance of the XP26 and XT3 sockets and the power supply component failure; Step 2: Use the fault diagnosis platform to test the output parameters of the power supply component of the radar electronic equipment to check the working condition of the power supply component. If the test is qualified, it means that the power supply component is working normally and proceed to the next step; If the test fails, troubleshoot the power supply component; Step 3: Use the fault diagnosis platform to detect the subcarrier frequency amplitude of the coarse control voltage Ug and fine control voltage Ut of the radar electronic equipment correction receiver. If the test voltage is qualified, it means that the correction receiver circuit is qualified, and go to the next step; If the test fails, troubleshoot and correct the receiver failure; Step 4: Use the fault diagnosis platform to detect the frequency and amplitude of the three output signals Σ, Δ1 and Δ2 of the microwave receiver of the radar electronic equipment. If the signal is qualified, proceed to the next step; if the signal is unqualified, it means that the microwave receiver or its front-stage component synchronizer or self-test signal device is faulty, and the corresponding faulty parts are checked; Step 5: Use the fault diagnosis platform to detect the frequency and amplitude of the first local oscillator signal Fг1, the second local oscillator signal Fг2, the detection signal Fc, the self-test signal Fkc, the clock signal FTAKT, the frequency source output signal and the FРИЦ signal output by the master oscillator of the radar electronic equipment. If the test is qualified, it means that the master oscillator is qualified and enters the next step; if the test is unqualified, it means that the master oscillator is faulty and the faulty part is checked; Step 6: Use the fault diagnosis platform to test the local oscillator input signal ВХОДFГ1, output signal ВЫХОДFГ1 and control signal УСГ1 of the local oscillator switch of the radar electronic equipment. If the test is qualified, it means that the local oscillator switch is qualified and proceed to the next step; If the test fails, it means that the local oscillator switch is faulty, check the faulty parts; Step 7: Use the fault diagnosis platform to detect the RF switch and IF switch signals of the synchronizer of the radar electronic equipment. If the test is qualified, it means that the synchronizer is qualified and proceed to the next step; If the test fails, it means the synchronizer is faulty, check the faulty parts; Step 8: Use the fault diagnosis platform to detect the gyro excitation signal of the position marker servo drive circuit of the radar electronic equipment; if the test is qualified, it means that the position marker servo drive circuit is qualified, and the fault diagnosis process ends; if the test is unqualified, it means that the position marker servo drive circuit is faulty, and the faulty part is checked.

Images