CN100570376C - The method of doorsill speed inverse-pulling automatically testing start-up current of steering engine - Google Patents
The method of doorsill speed inverse-pulling automatically testing start-up current of steering engine Download PDFInfo
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- CN100570376C CN100570376C CNB200710018948XA CN200710018948A CN100570376C CN 100570376 C CN100570376 C CN 100570376C CN B200710018948X A CNB200710018948X A CN B200710018948XA CN 200710018948 A CN200710018948 A CN 200710018948A CN 100570376 C CN100570376 C CN 100570376C
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Abstract
The invention discloses a kind of method of doorsill speed inverse-pulling automatically testing start-up current of steering engine, be used to test the steering wheel starting current, in test process, the observing and controlling computing machine increases gradually with the control law of determining handles the relay coil Control current, measure steering wheel output terminal speed simultaneously, the observing and controlling computing machine is judged the relation of steering wheel output terminal speed and threshold speed, when steering wheel output terminal speed during more than or equal to threshold speed, the current value of getting the last test point correspondence of threshold speed is the starting current of steering wheel.Problems such as the test of aircraft steering wheel starting current is difficult, precision is not high have been solved, adopt the observing and controlling computer controlled automatic to handle the relay coil electric current, whole test process does not need people's participation, press " beginning test " button on the human-computer interaction interface, whole test job and data processing are all finished automatically by the observing and controlling computing machine.The present invention is doing useful trial aspect the automatic test technology of steering wheel starting current, improved steering wheel starting current automatic test technology level.
Description
Technical field
The present invention relates to a kind of aircraft steering wheel starting current method of testing, particularly a kind of method that is used for the doorsill speed inverse-pulling automatically testing start-up current of steering engine of testing airplane steering wheel starting current.
Background technology
In steering wheel damping state speed gain test process, when steering wheel is handled the relay Control current less than starting current, the steering wheel output terminal is motion not, but since the influence of factors such as mechanical vibration, electromagnetic interference (EMI), near fluctuation within a narrow range zero-bit of steering wheel measurement of output end speed, so, regulating steering wheel manipulation relay current with traditional manual method makes it reach relatively difficulty of starting current, automaticity is low, test probability of human error height, and measuring accuracy and accuracy are low.For this reason, can adopt method of the present invention to test the appearance that can avoid this problem, being used among the present invention the method for testing the doorsill speed inverse-pulling automatically testing start-up current of steering engine of steering wheel starting current just can solve automatic test well and improve these two problems of measuring accuracy.
Summary of the invention
At the too low and low problem of automaticity of above-mentioned existing traditional manual testing's method test steering wheel starting current precision, the objective of the invention is to, a kind of method that is used to test the doorsill speed inverse-pulling automatically testing start-up current of steering engine of steering wheel starting current is provided, adopt PXI bus and virtual test technology, in test process, the observing and controlling computing machine increases manipulation relay coil electric current gradually with the control law of determining, and (for example: the time interval is 0.1s, every time interval controls electric current increases 0.1mA), measure steering wheel output terminal speed simultaneously, when steering wheel output terminal speed reach (more than or equal to) during threshold speed, its corresponding Control current has in fact just surpassed starting current, that is to say, the starting current size should can determine that previous moment Control current value is a steering wheel starting current measured value between corresponding Control current of threshold speed and previous moment Control current.Low and the low problem of precision of automaticity when this threshold speed backstepping automatic test approach has solved the test of steering wheel starting current.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of method of doorsill speed inverse-pulling automatically testing start-up current of steering engine is used to test the steering wheel starting current, it is characterized in that, in test process, the observing and controlling computing machine increases the Control current I that handles relay coil gradually with the control law of determining
i, measure steering wheel output terminal speed V simultaneously
iThe observing and controlling computer control software is judged the relation of steering wheel output terminal speed and threshold speed, when steering wheel output terminal speed during more than or equal to threshold speed, determines that the current value of the last test point correspondence of threshold speed is the starting current I of steering wheel
Open=I
I-1
Concrete test comprises the following steps:
Step 1 is pressed the testing button on the human-computer interaction interface of observing and controlling computing machine, and relay Control current I is handled in the output of observing and controlling computing machine
i=I
0, wherein, I
0For handling the initial Control current of relay;
Step 2, Control Software is waited for a data collection period Δ t, gathers and write down tested steering wheel output terminal speed V
i
Step 3 is judged steering wheel output terminal speed V
iWith threshold speed V
ThresholdRelation, if V
i＜V
Threshold, relay Control current I is handled in the output of observing and controlling computing machine
i=I
I-1+ Δ I, wherein Δ I handles the Control current that relay is regulated in the Δ t time, and returns step 2 and continue image data, on the contrary the step 4 of changing over to;
Step 4 is determined starting current I
Open=I
I-1, and on the human-computer interaction interface of observing and controlling computing machine display result, finish test.
Steering wheel starting current threshold speed backstepping measuring method of the present invention, test process is fully by computer control, adopt the observing and controlling computer controlled automatic to handle the relay coil electric current, as long as press " beginning test " button on the human-computer interaction interface, whole test job and data processing are all finished automatically by the observing and controlling computing machine, have realized that the steering wheel starting current tests automatically.Solved the problem that traditional manual testing's steering wheel starting current test is difficult, precision is not high.
Description of drawings
Fig. 1 is a steering wheel starting current test philosophy block scheme;
Fig. 2 is a steering wheel starting current test curve;
Fig. 3 is a steering wheel starting current test flow chart;
The present invention is described in further detail below in conjunction with accompanying drawing and specific implementation method.
Embodiment
The steering wheel starting current is meant that the steering wheel output terminal is by the needed Control current size of stationary state setting in motion.When steering wheel is handled the relay Control current less than starting current, the steering wheel output terminal is motion not, but because the influence of factors such as mechanical vibration, electromagnetic interference (EMI), near fluctuation within a narrow range zero-bit of steering wheel measurement of output end speed, so, the speed of judging steering wheel output terminal setting in motion must be apparently higher than interference value, and this speed just is called threshold speed.Analyze certain steering wheel output terminal speed interference magnitude after tested and be about 0.15mm/s, so threshold speed can be defined as 0.5mm/s.
Method of the present invention is utilized computer autocontrol technique, in test process, the observing and controlling computing machine increases manipulation relay coil electric current gradually with the control law of determining, and (for example: the time interval is 0.1s, every time interval controls electric current increases 0.1mA), measure steering wheel output terminal speed simultaneously, when steering wheel output terminal speed reach (more than or equal to) during threshold speed, its corresponding Control current has in fact just surpassed starting current, that is to say, the starting current size should be between corresponding Control current of threshold speed and previous moment Control current, can determine that previous moment Control current value is a steering wheel starting current measured value, this method is called threshold speed backstepping method.
Steering wheel starting current test philosophy block scheme as shown in Figure 1.Displacement/speed pickup is installed on the steering wheel hydraulic test bench, displacement/speed pickup is gathered the A/D modular converter input end (input 0～5V) that steering wheel output terminal stroke/rate signal enters the observing and controlling computing machine, (output signal 0～20mA) is sent into the manipulation relay by amplifying conditioning module to the D/A modular converter output terminal of observing and controlling computing machine, the observing and controlling computer recording is handled the data of observing and controlling computer acquisition, outputs test result at last.
Steering wheel starting current threshold speed backstepping measuring method does not need people's participation, test process is fully by computer control, adopt the observing and controlling computer controlled automatic to handle the relay coil electric current, as long as press " beginning test " button on the human-computer interaction interface, whole test job and data processing are all finished automatically by the observing and controlling computing machine, have realized that the steering wheel starting current tests automatically.Method of the present invention has solved problems such as traditional manual testing's aircraft steering wheel starting current test is difficult, precision is not high, with curve shown in Figure 2 is example, the measurement absolute error of this method is less than 0.1mA, for the measurement passage that range is 50mA, the full scale measuring error that it causes is less than 2/1000ths.
The software of observing and controlling computing machine adopts following method to finish: testing software adopts based on the LabWindows/CVI virtual instrument software of the America NI company of C language and designs and develops; Be provided with a clock in the software and be used for the specified data collection period, design the interior relay coil Control current of handling of every mistake one data collection cycle and change by rule; While data such as output terminal displacement of acquisition and recording steering wheel and Windows time in each collection period; At last data are carried out process of fitting treatment and net result is exported.Develop software based on the C language, its have readable strong, be easy to characteristics such as management, modular design easily, for example use call back function in the software design in a large number as subfunction; Function also is easily understood in the developing instrument, for example curve plotting function PlotXY judges value function MaxMin1D, and iunction for curve PolyFit etc. (can examine China Machine Press with reference to 1., Song Yufeng etc. write, and LabWindows/CVI progressively gos deep into and developing example; 2. Electronic Industry Press, Sun Xiaoyun etc. write, based on the Design of Virtual Instrument of LabWindows/CVI and application etc.).
Steering wheel starting current test concrete operations are as follows:
1) on the steering wheel hydraulic test bench, displacement/speed pickup is installed, force transducer is not installed, do not connect pumping plant testing hydraulic system.
2) proportional throttle valve control---automatically; Security of system pressure---automatically; Air cooler control---automatically; Damper Control---automatically; Handle relay excitation coil---automatically; Handle the relay coil electric current---automatically.
3) start Electric Machine at Pumping Station.
4) press " begin test " button and respectively control output channel and force to be set to " automatically ", the observing and controlling computer control is handled the relay coil Control current by following rule variation :-13mA (3s);-6mA～6mA (6s);-13mA (3s); + 13mA (3s); 0mA (3s); In the 3s～9s process, observing and controlling computer recording output Control current I
i, gather steering wheel output terminal speed v
iThe 18th second, the speed v of the judgement steering wheel output terminal of surveying
iWith the threshold speed v
ThresholdRelation, work as v
i〉=v
ThresholdThe time, can determine that the current value of the last test point correspondence of threshold speed is the steering wheel starting current.
5) system finishes test automatically in 18 seconds, and shows test results.
The method flow diagram of the doorsill speed inverse-pulling automatically testing start-up current of steering engine that is used to test the steering wheel starting current of the present invention as shown in Figure 3.
Specifically may further comprise the steps:
1) presses " begin test " button on the human-computer interaction interface;
2) the observing and controlling computer control is handled the relay coil Control current by following rule variation :-13mA (3s);-6mA～6mA (6s);-13mA (3s); + 13mA (3s); 0mA (3s).
3) in 3s～9s process, observing and controlling computer recording output Control current I
i, gather steering wheel output terminal position v
i
4) the observing and controlling computing machine carries out the data analysis processing, judges the speed v of the steering wheel output terminal of surveying
iWith the threshold speed v
ThresholdRelation, work as v
i〉=v
ThresholdThe time, can determine that the current value of the last test point correspondence of threshold speed is the steering wheel starting current;
5) on human-computer interaction interface, show steering wheel output terminal speed result.
The present invention provides is used to test the method for the doorsill speed inverse-pulling automatically testing start-up current of steering engine of steering wheel starting current, adopt the observing and controlling computer controlled automatic to handle the relay coil electric current, whole test job and data processing are all finished automatically by the observing and controlling computing machine, have realized that the steering wheel starting current tests automatically.Method of the present invention has overcome traditional manual testing's steering wheel starting current test difficulty, automaticity is low and the not high shortcoming of precision, has improved the precision and the accuracy of test.The hydraulic sterring engine testing table of being developed adopts PXI bus and virtual test technology, has well test and display capabilities automatically, and is easy to operate, man-machine interface close friend.
Claims (2)
1. the method for a doorsill speed inverse-pulling automatically testing start-up current of steering engine is used to test the steering wheel starting current, it is characterized in that, in test process, the observing and controlling computing machine increases the Control current I that handles relay coil gradually with the control law of determining
i, measure steering wheel output terminal speed V simultaneously
i, the observing and controlling computing machine is judged the relation of steering wheel output terminal speed and threshold speed, when steering wheel output terminal speed during more than or equal to threshold speed, determines that the current value of the last test point correspondence of threshold speed is the starting current I of steering wheel
Open=I
I-1
2. the method for claim 1 is characterized in that, specifically may further comprise the steps:
Step 1 is pressed the testing button on the human-computer interaction interface of observing and controlling computing machine, and relay Control current I is handled in the output of observing and controlling computing machine
i=I
0, wherein, I
0For handling the initial Control current of relay;
Step 2, Control Software is waited for a data collection period Δ t, gathers and write down tested steering wheel output terminal speed V
i
Step 3 is judged steering wheel output terminal speed V
iWith threshold speed V
ThresholdRelation, if V
i＜V
Threshold, relay Control current I is handled in the output of observing and controlling computing machine
i=I
I-1+ Δ I, wherein Δ I handles the Control current that relay is regulated in the Δ t time, and returns step 2 and continue image data, on the contrary the step 4 of changing over to;
Step 4 is determined starting current I
Open=I
I-1, and display result, finish test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710018948XA CN100570376C (en) | 2007-10-26 | 2007-10-26 | The method of doorsill speed inverse-pulling automatically testing start-up current of steering engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710018948XA CN100570376C (en) | 2007-10-26 | 2007-10-26 | The method of doorsill speed inverse-pulling automatically testing start-up current of steering engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101183122A CN101183122A (en) | 2008-05-21 |
| CN100570376C true CN100570376C (en) | 2009-12-16 |
Family
ID=39448462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710018948XA Expired - Fee Related CN100570376C (en) | 2007-10-26 | 2007-10-26 | The method of doorsill speed inverse-pulling automatically testing start-up current of steering engine |
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|---|---|
| CN (1) | CN100570376C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062806A (en) * | 2010-12-04 | 2011-05-18 | 国营红峰机械厂 | Current detection technology for power amplification of rudder system |
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2007
- 2007-10-26 CN CNB200710018948XA patent/CN100570376C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101183122A (en) | 2008-05-21 |
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