CN-122016265-A - Device and method for detecting quality qualification of fuel regulator

CN122016265ACN 122016265 ACN122016265 ACN 122016265ACN-122016265-A

Abstract

The application provides a quality qualification detection device and method for a fuel regulator, comprising a PWM generation module, an electromagnetic valve module, a linear displacement sensor module, a sensor signal conditioning module, a signal measurement module, an operation control unit, a balance duty ratio identification algorithm module, a dead zone energy identification algorithm module and a qualification identification algorithm module, wherein the input of the PWM generation module is connected with the operation control unit, the output of the PWM generation module is connected with an electromagnetic valve driving module, the input of the electromagnetic valve module is electrically connected with the electromagnetic valve driving module, the output of the electromagnetic valve module is mechanically connected with a metering valve, the input of the linear displacement sensor module is connected with the electromagnetic valve, the output of the linear displacement sensor module is connected with the sensor signal conditioning module, and the input of the sensor signal conditioning module is connected with the linear displacement sensor module.

Inventors

ZHANG WENLONG
WANG SHUNJI
ZHENG JUAN
TAO YI
YAN SAICHAO
GONG XINPING

Assignees

中国航发西安动力控制科技有限公司

Dates

Publication Date: 20260512
Application Date: 20251107

Claims (10)

1. The quality qualification detection device for the fuel regulator is characterized by comprising a PWM generation module, an electromagnetic valve module, a linear displacement sensor module, a sensor signal conditioning module, a signal measurement module, an operation control unit, a balance duty ratio identification algorithm module, a dead zone energy identification algorithm module and a qualification identification algorithm module, wherein: The input of the PWM generation module is connected with the operation control unit, the output of the PWM generation module is connected with the electromagnetic valve driving module, the input of the electromagnetic valve module is electrically connected with the electromagnetic valve driving module, the output of the electromagnetic valve module is mechanically connected with the metering valve, the input of the linear displacement sensor module is connected with the electromagnetic valve, the output of the linear displacement sensor module is connected with the sensor signal conditioning module, the input of the sensor signal conditioning module is connected with the operation control module, the operation control module is respectively connected with the sensor signal conditioning module, the PWM generation module, the balance duty ratio identification algorithm module, the dead zone energy identification algorithm module and the qualification identification algorithm module, the balance duty ratio identification algorithm module is connected with the dead zone energy identification algorithm module, and the dead zone energy identification algorithm module is connected with the balance duty ratio identification algorithm module and the qualification identification algorithm module.
2. The device according to claim 1, wherein the operation control unit is an operation control core of the device, on one hand, outputs PWM signals, which are converted into power signals by the driving module and output to the solenoid valve, and on the other hand, reads LVDT acquisition information, calculates a shutter stroke, and meanwhile, it also carries calculation of the algorithm identification module, provides operation control resources for operation of the algorithm module, and realizes scheduling of the algorithm module.
3. The device according to claim 1, wherein the PWM generation module is configured to generate a pulse width modulation signal to control an operating state of the solenoid valve; The electromagnetic valve driving module converts a control signal, namely a PWM signal, into a power signal capable of driving the electromagnetic valve to work; the electromagnetic valve is used for receiving the control signal and executing the switching action to drive the metering valve core to move and control the opening, closing or opening adjustment of the metering valve core; The metering valve is a controlled object, and the opening degree of the metering valve influences the fuel flow metering; The linear displacement sensor module is used for measuring the stroke of the valve, outputting a voltage signal through electromagnetic induction, wherein the voltage amplitude is in direct proportion to the displacement, and the phase reflects the movement direction; the sensor signal conditioning module is used for generating excitation of the linear displacement sensor, conditioning sinusoidal signals output by the linear displacement sensor, conditioning voltage signals of the linear displacement sensor module and converting the voltage signals into voltage signals which can be acquired by the operation control unit; the signal measuring module is used for measuring the PWM output duty ratio and the displacement measurement of the linear displacement sensor module; The balance duty ratio identification algorithm module is used for identifying the balance duty ratio of the electromagnetic valve when the electromagnetic valve is stable; the dead zone energy identification algorithm module is used for identifying the limit dead zone energy required by the electromagnetic valve to drive the metering valve; the qualification recognition algorithm module is used for recognizing qualification of the metering valve.
4. The apparatus of claim 1, wherein the linear displacement sensor module receives a sine wave excitation signal and outputs VA, VB signals of variable amplitude, wherein: The sine wave excitation signal drives the DDS chip by the sensor signal conditioning module, sine signals are output through programming, the VA and VB signals are sine waves, the amplitude values of the VA and VB signals change according to linear displacement, and the sum of the effective values of the VA and VB signals is Vconst.
5. The apparatus of claim 1, wherein the sensor signal conditioning module comprises a linear displacement sensor excitation signal conditioning module, a linear displacement sensor feedback signal conditioning module, wherein: The linear displacement sensor excitation signal conditioning module is composed of a power supply source, a DDS chip and a signal filtering circuit, wherein the power supply source provides digital and analog power for the DDS chip, the analog power supply is positive and negative, the DDS chip is programmed and configured by a microprocessor in an operation control module and outputs sinusoidal signals, the signal filtering circuit is second-order active chebyshev filtering, and the filtering parameters are regulated by resistance and capacitance; The linear displacement sensor feedback signal conditioning module is composed of a filter circuit, an effective value conversion circuit and an AD converter, wherein the filter circuit is second-order active Chebyshev filtering, filtering parameters are regulated by resistance and capacitance, the effective value conversion circuit extracts an effective value of an alternating current signal through a digital signal processing method and converts the effective value into an equivalent direct current voltage, the AD converter is periodically driven by an operation control module, high-precision sampling of the direct current signal is achieved, and analog voltage is converted into a digital signal.
6. The apparatus of claim 1, wherein the signal measurement module comprises a PWM duty cycle measurement module, a linear displacement sensor displacement measurement module, and a timestamp generation module, wherein: The PWM duty ratio measuring module is used for receiving the PWM signal output by the acquisition operation control module, isolating and shaping the signal through the two-stage inverter, inputting the signal into the CAP signal input port of the microprocessor, and monitoring the duty ratio of the PWM signal through the CAP controller; The linear displacement calculation module calculates voltage values corresponding to the VA and VB according to the obtained VA and VB, converts the output of the linear displacement sensor into a Bit value according to a difference ratio and a calculation method of the linear displacement sensor and a corresponding relation between the difference ratio and a Bit value, and sorts and median filters the measurement results by a median filtering digital signal processing algorithm; the time stamp generating module generates a high-precision time stamp by the operation control module, outputs the high-precision time stamp to the signal measuring module, and adds the time stamp to the PWM duty ratio and linear displacement measuring result by the signal measuring module.
7. The apparatus of claim 1, wherein the operation control module comprises a microprocessor module, a DDS programming control module, an AD converter acquisition control module, a PWM output control module, a model recognition algorithm operation control module, wherein: The microprocessor module is a deployment carrier of operation control function software of other modules; The DDS programming control module interacts with the microprocessor module through a serial bus to program the excitation signal of the linear displacement sensor; the AD converter acquisition control module periodically controls a sampling start signal of the AD converter according to the sampling rate required by the system, waits for an AD conversion end signal and reads an AD conversion result; The PWM output control module receives the PWM duty cycle requirement output by the model identification algorithm module and configures a PWM controller of the microprocessor to output a target duty cycle; The model identification algorithm operation control module realizes the realization of the model identification algorithm function in the processor, including the decomposition and the implementation of control time sequence.
8. A fuel regulator quality eligibility detection method, characterized in that the method is applied to the fuel regulator quality eligibility detection device of any one of claims 1 to 7, and the method comprises: Step 1, a balanced duty ratio identification algorithm module calculates a balanced duty ratio Da; Step 2, a dead zone energy identification algorithm module identifies limit dead zone energy required by the electromagnetic valve to drive the metering valve according to the balanced duty ratio, wherein the dead zone energy is defined as the product of the difference value between 100% duty ratio D1 and Da and duty ratio action time t; Step 3, repeating the test for M times for each of N metering valves, and recording the energy E of the dead zone; step 4, checking abnormal data values and reasonably eliminating the abnormal data values; Step 5, calculating the mean value and standard deviation of the group of data; step 6, drawing a normal distribution curve graph, verifying whether data distribution is consistent with curve trend, and checking whether dead zone energy values obey normal distribution through a shape-Wilk principle; Step 7, defining a qualified interval range according to the valve quality standard and based on a2σ criterion, wherein the qualified interval range falls into the qualified interval range to be qualified, and the rest is considered to be unqualified; And 8, properly reducing the friction degree for the valve with the excessively large dead zone energy, and increasing the friction degree for the valve with the excessively small dead zone energy.
9. The method according to claim 8, wherein the step 1 comprises: step 11, adjusting a tester and detection equipment, setting a duty ratio D range D1-D2, and setting a step length Dstep; step 12, monitoring valve core displacement of the valve by a signal measuring module, and recording the current displacement L (D); Step 13, gradually increasing the duty ratio, keeping a stable output state T, and recording the next displacement L (D+1); And 14, judging L (D+1) -L (D), if the L (D+1) -L (D) | < delta, recording that the duty ratio is the balance duty ratio Da at the moment, outputting the balance duty ratio to the dead zone energy identification algorithm module, and if the balance duty ratio is not satisfied, repeating the step 3.
10. The method according to claim 8, wherein the step 2 comprises: step 21, setting initial acting time t1, wherein the stepping quantity delta t is tstep; Step 22, monitoring valve core displacement by a signal measuring module, and recording current displacement L (t), wherein t is tstep; Step 23, gradually increasing the stepping quantity, recording the displacement quantity L (t+n is delta t) at the next moment, wherein n is the number of times of increasing the stepping quantity; Step 24, determining L (t+n×Δt) -L (t), if |l (t+n×Δt) -L (t) | > δ, recording the action duration t+n×Δt at the moment, calculating dead zone energy e=Δd (t+n×Δt) at the moment, transmitting the dead zone energy E to the qualification recognition algorithm module, and if not, repeating step 3.

Description

Device and method for detecting quality qualification of fuel regulator Technical Field The invention belongs to the field of fuel control of aeroengines, and particularly relates to a device and a method for detecting quality qualification of a fuel regulator. Background The metering device of the fuel regulator is a key component of an aeroengine control system, and the opening and closing of the metering valve directly affects the fuel metering precision and is critical to the control performance and reliability of the engine. In practical application, the metering valve is subjected to different magnitudes under the action of dynamic and static friction, so that the dead time is too long or too short when the electromagnetic valve is driven, the stroke of the metering valve cannot be accurately controlled, and further the rotation speed of the engine is swung, and faults frequently occur. Currently, a method for testing the qualification of the valve is to manually test the damping of the valve by using a tension meter, judge the qualification of the valve according to an empirical value, and have a certain error. Disclosure of Invention The invention provides a device and a method for detecting the quality qualification of a fuel regulator, which can solve the problem of large qualification error of a test valve. In a first aspect, the application provides a fuel regulator quality qualification detection device, which comprises a PWM generation module, an electromagnetic valve module, a linear displacement sensor module, a sensor signal conditioning module, a signal measurement module, an operation control unit, a balance duty ratio identification algorithm module, a dead zone energy identification algorithm module and a qualification identification algorithm module, wherein: The input of the PWM generation module is connected with the operation control unit, the output of the PWM generation module is connected with the electromagnetic valve driving module, the input of the electromagnetic valve module is electrically connected with the electromagnetic valve driving module, the output of the electromagnetic valve module is mechanically connected with the metering valve, the input of the linear displacement sensor module is connected with the electromagnetic valve, the output of the linear displacement sensor module is connected with the sensor signal conditioning module, the input of the sensor signal conditioning module is connected with the operation control module, the operation control module is respectively connected with the sensor signal conditioning module, the PWM generation module, the balance duty ratio identification algorithm module, the dead zone energy identification algorithm module and the qualification identification algorithm module, the balance duty ratio identification algorithm module is connected with the dead zone energy identification algorithm module, and the dead zone energy identification algorithm module is connected with the balance duty ratio identification algorithm module and the qualification identification algorithm module. Furthermore, the operation control unit is an operation control core of the device, on one hand, outputs PWM signals, converts the PWM signals into power signals by the driving module and outputs the power signals to the electromagnetic valve, on the other hand, reads LVDT acquisition information and calculates valve travel, and meanwhile, the operation control unit also carries calculation of the algorithm identification module, provides operation control resources for operation of the algorithm module, and realizes scheduling of the algorithm module. Further, the PWM generation module is used for generating a pulse width modulation signal and controlling the working state of the electromagnetic valve; The electromagnetic valve driving module converts a control signal, namely a PWM signal, into a power signal capable of driving the electromagnetic valve to work; the electromagnetic valve is used for receiving the control signal and executing the switching action to drive the metering valve core to move and control the opening, closing or opening adjustment of the metering valve core; The metering valve is a controlled object, and the opening degree of the metering valve influences the fuel flow metering; The linear displacement sensor module is used for measuring the stroke of the valve, outputting a voltage signal through electromagnetic induction, wherein the voltage amplitude is in direct proportion to the displacement, and the phase reflects the movement direction; the sensor signal conditioning module is used for generating excitation of the linear displacement sensor, conditioning sinusoidal signals output by the linear displacement sensor, conditioning voltage signals of the linear displacement sensor module and converting the voltage signals into voltage signals which can be acquired by the operation control unit; the signal measuring modu