CN108036864A - A kind of FIR filtering methods of tail-rotor temperature sensor signal - Google Patents
A kind of FIR filtering methods of tail-rotor temperature sensor signal Download PDFInfo
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- CN108036864A CN108036864A CN201711081230.5A CN201711081230A CN108036864A CN 108036864 A CN108036864 A CN 108036864A CN 201711081230 A CN201711081230 A CN 201711081230A CN 108036864 A CN108036864 A CN 108036864A
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- tail
- temperature sensor
- signal
- mrow
- rotor
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21137—Analog to digital conversion, ADC, DAC
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H2017/0072—Theoretical filter design
- H03H2017/0081—Theoretical filter design of FIR filters
Abstract
The invention belongs to the anti-deicing field of aircraft, and in particular to a kind of FIR filtering methods of tail-rotor temperature sensor signal.When being rotated at a high speed due to tail-rotor afflux ring assemblies, the pulsation of brush pressure, the interference of external vibration can cause the contact resistance between brush and conducting ring to be shaken, and the temperature sensor signal for making to be passed produces distortion.The present invention utilizes the tail-rotor temperature sensor signal of actual hardware environment collection analysis Noise, utilize the FIR filter design analyzer in Matlab, obtain FIR filtering parameters, temperature signal sampling and filtering process are realized by DSP, interference burr is removed, obtains tail-rotor temperature sensor temperature signal.The tail-rotor temperature sensor temperature signal being submerged in noise can be effectively extracted, there is high certainty of measurement, stable and reliable for performance, measurement range is wide.
Description
Technical field
The invention belongs to the anti-deicing field of aircraft, and in particular to a kind of FIR filtering sides of tail-rotor temperature sensor signal
Method.
Background technology
The anti-deicing system of lifting airscrew is by the way of power supply heating, realizes that main blade deicing function and tail-rotor leaf are prevented
Ice function, the anti-icing control of tail-rotor are sampled by arranging two temperature sensors in tail-rotor leaf heating component insulated thermal insulating layer
The temperature of two temperature sensors realizes tail-rotor computer heating control.
But since when tail-rotor afflux ring assemblies rotate at a high speed, the pulsation of brush pressure, the interference of external vibration can cause
Contact resistance shake between brush and conducting ring, the temperature sensor signal for making to be passed, which produces, to distort, after hardware filtering still
Whole burrs cannot be effectively removed, when burr is wider or continuously burr occurs, the temperature signal of multiple repairing weld removes maximum
And minimum value, the algorithm being then averaged again will calculate the temperature to make mistake, so as to be mistaken for temperature sensor fails, cause
Tail-rotor loses anti-icing function, it is therefore necessary to goes flash removed to obtain tail-rotor temperature sensor temperature using effectively software filtering mode
Signal.
The content of the invention
Goal of the invention：A kind of FIR filtering methods of tail-rotor temperature sensor signal are provided, it is effective to remove interference burr,
Obtain tail-rotor temperature sensor temperature signal.
Technical solution：The FIR filtering methods of tail-rotor temperature sensor signal of the present invention, comprise the following steps：
(1) low-pass cut-off frequencies are determined according to the signal of temperature sensor；
(2) utilize Matlab in FIR filter design analyzer, by the low-pass cut-off frequencies, sample frequency and
Default filter order n obtains corresponding filtering parameter array H [i] as input(0≤i≤n-1), amplitude-frequency response and phase-frequency response；
(3) the ADC sample frequencys of DSP are set, with reference to above-mentioned filtering parameter array H [i](0≤i≤n-1), to real-time sampling temperature
Spend signal array X [i](0≤i≤k-1), following filtering process is carried out, obtains filtering temperature array f (m)：
Wherein, k is the length of sample temperature signal array；
(4) smothing filtering is carried out to filtering temperature array, averages and obtain the temperature value of tail-rotor temperature sensor.
In the step (1), by the signal of DSP measurement temperature sensors under use environment, by temperature signal
Low-pass cut-off frequencies of the frequency that burr occurs as FIR filtering methods.
In the step (2), according to the time demand of signal transmission, the temperature signal of tail-rotor temperature sensor is determined more
The new time, and the sample frequency of tail-rotor temperature sensor is set accordingly.
In the step (2), trickle adjustment is carried out to filtering parameter as needed.
In the step (4), take and go small mode to eliminate spiking greatly.
The present invention is utilized using the tail-rotor temperature sensor signal of actual hardware environment collection analysis Noise
FIR filter design analyzer in Matlab, obtains FIR filtering parameters, is realized by DSP at temperature signal sampling and filtering
Reason, removes interference burr, obtains tail-rotor temperature sensor temperature signal.
Beneficial effect：Collecting ring method for processing noise provided by the invention based on FIR filtering, which can be extracted effectively, to be flooded
Tail-rotor temperature sensor temperature signal in noise, has high certainty of measurement, the spy such as stable and reliable for performance, measurement range is wide
Point.
Brief description of the drawings
Fig. 1 is flow chart of the method for the present invention.
Embodiment
The present invention is described in further details below.
Referring to Fig. 1, of the invention comprises the following steps that：
1. by the signal of DSP measurement temperature sensors under use environment, the frequency that burr in temperature signal is occurred
Low-pass cut-off frequencies as FIR filtering methods；The time demand sent according to signal, determines the temperature of tail-rotor temperature sensor
Signal update time, and the sample frequency of tail-rotor temperature sensor is set accordingly；
2. using the FIR filter design analyzer in Matlab, according to above-mentioned low-pass cut-off frequencies and sample frequency, with
And default filter order n, obtain corresponding filtering parameter array H [i](0≤i≤n-1), amplitude-frequency response and phase-frequency response, according to need
Trickle adjustment is carried out to filtering parameter；
3. the ADC sample frequencys of DSP are set, with reference to above-mentioned filtering parameter array H [i](0≤i≤n-1), to real-time sampling temperature
Signal array X [i](0≤i≤k-1), following filtering process is carried out, obtains filtering temperature array f (m)：
Wherein, k is the length of sample temperature signal array；
The small rear mode being averaging is gone to eliminate spiking greatly 4. the temperature array drawn after filtering is taken, and finally
Draw the temperature value of tail-rotor temperature sensor.
After the filtering measures, proved by a large number of experiments, tail-rotor temperature sensor temperature signal is not judged by accident, is said
The bright filtering measures taken are correctly effective, can filter out collecting ring well and rotate the interference brought at a high speed, ensure that tail-rotor temperature is adopted
Sample is correct.
Claims (5)
1. a kind of FIR filtering methods of tail-rotor temperature sensor signal, it is characterised in that this method comprises the following steps：
(1) low-pass cut-off frequencies are determined according to the signal of temperature sensor；
(2) the FIR filter design analyzer in Matlab is utilized, by the low-pass cut-off frequencies, sample frequency and is preset
Filter order n as input, obtain corresponding filtering parameter array H [i](0≤i≤n-1), amplitude-frequency response and phase-frequency response；
(3) the ADC sample frequencys of DSP are set, with reference to above-mentioned filtering parameter array H [i](0≤i≤n-1), real-time sampling temperature is believed
Number group X [i](0≤i≤k-1), following filtering process is carried out, obtains filtering temperature array f (m)：
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Wherein, k is the length of sample temperature signal array；
(4) smothing filtering is carried out to filtering temperature array, averages and obtain the temperature value of tail-rotor temperature sensor.
2. FIR filtering methods according to claim 1, it is characterised in that：In the step (1), used by DSP
The signal of measurement temperature sensor under environment, cuts the frequency that burr in temperature signal occurs as the low pass of FIR filtering methods
Only frequency.
3. FIR filtering methods according to claim 1, it is characterised in that：In the step (2), sent according to signal
Time demand, determine temperature signal renewal time of tail-rotor temperature sensor, and adopting for tail-rotor temperature sensor is set accordingly
Sample frequency.
4. FIR filtering methods according to claim 1, it is characterised in that：In the step (2), as needed to filter
Wave parameter carries out trickle adjustment.
5. FIR filtering methods according to claim 1, it is characterised in that：In the step (4), take go greatly it is small
Mode eliminate spiking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711081230.5A CN108036864A (en) | 2017-11-06 | 2017-11-06 | A kind of FIR filtering methods of tail-rotor temperature sensor signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711081230.5A CN108036864A (en) | 2017-11-06 | 2017-11-06 | A kind of FIR filtering methods of tail-rotor temperature sensor signal |
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| Publication Number | Publication Date |
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| CN108036864A true CN108036864A (en) | 2018-05-15 |
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|---|---|---|---|
| CN201711081230.5A Pending CN108036864A (en) | 2017-11-06 | 2017-11-06 | A kind of FIR filtering methods of tail-rotor temperature sensor signal |
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Citations (8)
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| CN1566984A (en) * | 2003-06-19 | 2005-01-19 | 中国科学院声学研究所 | Method for sonar array signal simulation by utilizing interpolation filter |
| CN1976224A (en) * | 2006-12-15 | 2007-06-06 | 天津大学 | Low pass continuous adjustable filter and filtering method |
| CN202406100U (en) * | 2011-12-16 | 2012-08-29 | 中船重工（武汉）凌久电子有限责任公司 | High-precision digital-to-analog converter for band-limited signals |
| CN103124168A (en) * | 2011-11-21 | 2013-05-29 | 天津中兴软件有限责任公司 | Digital filtering method |
| CN103792969A (en) * | 2013-11-28 | 2014-05-14 | 佛山市汉隆自动化技术有限公司 | Multi-loop intelligent temperature control module |
| CN104825140A (en) * | 2014-02-11 | 2015-08-12 | 瞿浩正 | Digital filter method for pulse wave extraction, and digital filter |
| US20150280943A1 (en) * | 2012-10-23 | 2015-10-01 | Yushan Hao | Data Sampling Method and System, and Application Method and System Thereof in Parameter Identification |
| CN106323277A (en) * | 2015-07-10 | 2017-01-11 | 褚秀清 | Signal collection circuit of laser gyroscope inertial navigation instrument |
-
2017
- 2017-11-06 CN CN201711081230.5A patent/CN108036864A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| CN1566984A (en) * | 2003-06-19 | 2005-01-19 | 中国科学院声学研究所 | Method for sonar array signal simulation by utilizing interpolation filter |
| CN1976224A (en) * | 2006-12-15 | 2007-06-06 | 天津大学 | Low pass continuous adjustable filter and filtering method |
| CN103124168A (en) * | 2011-11-21 | 2013-05-29 | 天津中兴软件有限责任公司 | Digital filtering method |
| CN202406100U (en) * | 2011-12-16 | 2012-08-29 | 中船重工（武汉）凌久电子有限责任公司 | High-precision digital-to-analog converter for band-limited signals |
| US20150280943A1 (en) * | 2012-10-23 | 2015-10-01 | Yushan Hao | Data Sampling Method and System, and Application Method and System Thereof in Parameter Identification |
| CN103792969A (en) * | 2013-11-28 | 2014-05-14 | 佛山市汉隆自动化技术有限公司 | Multi-loop intelligent temperature control module |
| CN104825140A (en) * | 2014-02-11 | 2015-08-12 | 瞿浩正 | Digital filter method for pulse wave extraction, and digital filter |
| CN106323277A (en) * | 2015-07-10 | 2017-01-11 | 褚秀清 | Signal collection circuit of laser gyroscope inertial navigation instrument |
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| 张波等: "基于DSP的FIR低通滤波器设计", 《电声技术》 * |
| 李清等: "基于FPGA的多功能数字滤波器设计", 《湖北第二师范学院学报》 * |
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