CN100567928C - Dynamic derivative measuring systems under the rotational flow field - Google Patents
Dynamic derivative measuring systems under the rotational flow field Download PDFInfo
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- CN100567928C CN100567928C CNB2008101374228A CN200810137422A CN100567928C CN 100567928 C CN100567928 C CN 100567928C CN B2008101374228 A CNB2008101374228 A CN B2008101374228A CN 200810137422 A CN200810137422 A CN 200810137422A CN 100567928 C CN100567928 C CN 100567928C
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Abstract
The present invention relates to be used for the dynamic derivative measuring systems under the wind-tunnel dynamic comprehensive test rotational flow field, at measuring in nonstationary flow aerodynamic data after the match, need the non-permanent dynamic comprehensive experimental system of development aircraft, particularly need to develop the problem of the dynamic derivative measuring systems under the rotational flow field, dynamic derivative measuring systems under the rotational flow field is provided, technical solution of the present invention is made of axis of oscillation control gear and turning axle control gear, speed control is adopted in control for turning axle, position follower control is adopted in control to axis of oscillation, adopt the control industrial computer, the CAN bus controller, the electric rotating machine driver, the vibration synchronous generator, devices such as driven in rotation motor coding and speed reduction unit, it and tailspin test macro, each dynamic test system such as forced oscillation test macro together, can provide aircraft big angle of attack maneuverability, maneuverability, stability, a complete set of data such as stall spin prediction and analysis, significant to research vibration tailspin especially.
Description
(1) technical field
The present invention relates to the dynamic derivative measuring systems under the rotational flow field, be mainly used in the dynamic derivative measuring systems under the rotational flow field in the test of wind-tunnel dynamic comprehensive.
(2) background technology
At present, China's aviation industry fast development proposes higher requirement to aeroplane performance, should satisfy the high maneuverability energy of aircraft, have good stall spin characteristic again, for this reason, China has worked out tailspin test macro, forced oscillation test macro etc. in succession, and has come into operation.These systems are measured the aerodynamic data that aircraft is relevant in actual applications, provide the aerodynamic experiment data to the various performances of research aircraft, and crucial meaning is arranged.But, for measuring, need the non-permanent dynamic comprehensive experimental system of development aircraft in nonstationary flow aerodynamic data after the match, particularly need to develop the dynamic derivative measuring systems under the rotational flow field.
(3) summary of the invention
Purpose of the present invention is exactly the dynamic derivative measuring systems that provides under the rotational flow field, it is with having worked out each dynamic test system such as tailspin test macro, forced oscillation test macro in the past in succession, a complete set of data such as the big angle of attack maneuverability of aircraft, maneuverability, stability, stall spin prediction and analysis can be provided, significant to research vibration tailspin especially.
Technical scheme of the present invention is: the dynamic derivative measuring systems under the rotational flow field, constitute by axis of oscillation control section and turning axle control section, the control industrial computer sends control signal by the CAN bus controller, one the tunnel gives the electric rotating machine driver of turning axle control section, one the tunnel gives the vibration synchronous generator of axis of oscillation control section, after the electric rotating machine driver is received control signal, the driven in rotation spindle motor, shaft rotating motor driven in rotation motor encoder and speed reduction unit, all pulse producers of speed reduction unit driven in rotation axle and output rotating shaft, the coded signal of electric rotating machine scrambler feed back to the electric rotating machine driver and give with the door an input end, the signal of all pulse producers of turning axle is given the synchronous enabling signal generator, after the vibration synchronous generator is received control signal, the vibration synchronous generator is sent signal and is given the axis of oscillation motor driver, the axis of oscillation motor driver drives the axis of oscillation motor, axis of oscillation motor-driven speed reduction unit and axis of oscillation motor code-disc, speed reduction unit drives the output axis of oscillation, the signal feedback of axis of oscillation motor code-disc is given axis of oscillation motor driver and up-down counter, the signal of up-down counter is given D/A conversion, the D/A conversion connects the waveform monitor, the synchronous enabling signal generator also given signal by the vibration synchronous generator, the synchronous enabling signal generator sends synchronizing signal and gives another input end with door after receiving the signal that turning axle week pulse producer [6] sends here, give the vibration synchronous generator again with the output signal of door.
The present invention's beneficial effect against existing technologies, turning axle is adopted speed control method, axis of oscillation is adopted the position follower control mode, introduce certain frequency relation of axis of oscillation and turning axle, select the frequency ratio relation of diaxon in the control industrial computer, the parameters that calculates axis of oscillation passes to the vibration synchronous generator by the CAN bus controller.The vibration synchronous generator is exported pulse as requested, slows down by speed reduction unit, and the axis of oscillation motor is moved by sinusoidal rule.Owing to determined the frequency ratio relation of axis of oscillation and turning axle, just can determine that the each time interval, interrupt service routine that interrupts has enough working times and interim weekly disconnected number of times, step pitch can be not excessive when guaranteeing the motor simulation sine swing.
In order to guarantee the certain tones ratio relation of turning axle and axis of oscillation, utilize shaft rotating motor code-disc signal as interrupt source, obtain the interruption times of axis of oscillation, the size according to pivot angle calculates the number of pulses that each interruption is sent again, and calculation result data is transferred in the vibration synchronous generator.
The CAN bus controller is transferred to the vibration synchronous generator to the computational data of control industrial computer, and the angular oscillation of control axis of oscillation is utilized the position of rotation state of turning axle and concerned the motion of following the tracks of turning axle according to the frequency ratio of turning axle and axis of oscillation.If turning axle is definitely at the uniform velocity, it is that constant duration interrupts, and also is the interval interrupt such as angular displacement such as grade of turning axle.When turning axle is not that definitely at the uniform velocity it only is angular displacement interval interrupt such as turning axle.
Adopt d type flip flop in circuit, in d type flip flop, when having only all pulse signals that start permission signal and turning axle to arrive simultaneously, system could move, so disturbing pulse can not make system acting when stopping.Allow turning axle rotate earlier, after stablizing, allow axis of oscillation to start again.When allowing to start, have only the pulse of axis of oscillation after the zero pulse of axis of oscillation triggers d type flip flop just to carry out frequency division, the pulse behind the frequency division is as interruption pulse, and the control axis of oscillation vibrates.
Utilize the output of axis of oscillation motor back and forth movement through reversible counting and D/A conversion, become the simulating signal of reflection axis of oscillation vibration, with this reference signal as the vibration displacement, the while is as the supervision output of vibratory movement.
(4) description of drawings
Fig. 1 is the dynamic derivative measuring systems synoptic diagram under the rotational flow field.
Wherein, the 1st, shaft rotating motor, the 2nd, electric rotating machine scrambler, the 3rd, electric rotating machine driver, the 4th, speed reduction unit, the 5th, output rotating shaft, the 6th, all pulse producers of turning axle, the 7th, axis of oscillation motor, the 8th, axis of oscillation motor code-disc, the 9th, axis of oscillation motor driver, the 10th, speed reduction unit, the 11st, output axis of oscillation, the 12nd, up-down counter, the 13rd, D/A conversion, the 14th, waveform monitor, the 15th, vibration synchronous generator, the 16th, the control industrial computer, the 17th, the CAN bus controller, the 18th, the synchronous enabling signal generator, the 19th, with door.
(5) embodiment
List following specific embodiment in conjunction with Figure of description, technical scheme of the present invention is described further.
Embodiment:
Dynamic derivative measuring systems synoptic diagram under the rotational flow field as shown in Figure 1.Dynamic derivative measuring systems under the rotational flow field, constitute by axis of oscillation control section and turning axle control section, control industrial computer [16] sends control signal by CAN bus controller [17], one the tunnel gives the electric rotating machine driver [3] of turning axle control section, one the tunnel gives the vibration synchronous generator [15] of axis of oscillation control section, after electric rotating machine driver [3] is received control signal, driven in rotation spindle motor [1], shaft rotating motor [1] driven in rotation motor encoder [2] and speed reduction unit [4], all pulse producers [6] of speed reduction unit [4] driven in rotation axle and output rotating shaft [5], the coded signal of electric rotating machine scrambler [2] feed back to electric rotating machine driver [3] and give and the door [19] an input end, the signal of turning axle week pulse producer [6] is given synchronous enabling signal generator [18], after vibration synchronous generator [15] is received control signal, vibration synchronous generator [15] is sent signal and is given axis of oscillation motor driver [9], axis of oscillation motor driver [9] drives axis of oscillation motor [7], axis of oscillation motor [7] drives speed reduction unit [10] and axis of oscillation motor code-disc [8], speed reduction unit [10] drives output axis of oscillation [11], the signal feedback of axis of oscillation motor code-disc [8] is given axis of oscillation motor driver [9] and up-down counter [12], the signal of up-down counter [12] is given D/A conversion [13], D/A conversion [13] connects waveform monitor [14], synchronous enabling signal generator [18] also given signal by vibration synchronous generator [15], synchronous enabling signal generator [18] sends synchronizing signal and gives another input end with door [19] after receiving the signal that turning axle week pulse producer [6] sends here, give vibration synchronous generator [15] again with the output signal of door [19].
Dynamic derivative measuring systems under the described rotational flow field adopts speed control for the turning axle control section, and the axis of oscillation control section is adopted position follower control.
Dynamic derivative measuring systems under the described rotational flow field, synchronous enabling signal generator [18] is made of d type flip flop.
The course of work:
At first control the requirement (as amplitude, vibration start-up phase parallactic angle, gyro frequency, oscillation frequency etc.) of industrial computer [16],, provide the frequency ratio parameter, form a data file through calculating again according to gyro frequency and oscillation frequency correlation table according to test.File mainly is the different pulse number of sending out when calculating each the interruption, and utilize CAN bus controller [17] to pass to vibration synchronous generator [15], the synchronous generator [15] that makes it to vibrate is in treats duty, controlling industrial computer [16] then utilizes CAN bus controller [17] to start shaft rotating motor [1], shaft rotating motor [1] reaches it with long accelerator and requires rotational speed, though this moment, turning axle rotated, its displacement code-disc sends pulse, but can not start the vibration synchronous generator [15] of back, because close with door this moment.Enabling signal takes place and exports to d type flip flop in control industrial computer [16], when turning axle week, pulse signal arrived, just d type flip flop is put height, opening this moment with door [19] makes the turning axle displacement pulse signals enter synchronous generator, guarantee that it all is to begin that each vibration starts when all pulses arrive, be that turning axle starts axis of oscillation when arriving a certain ad-hoc location, guarantee that so each startup all has repeatability, and can accurately know this moment and later each point model attitude angle.
After the vibration synchronous generator receives the dfisplacement pulse of turning axle, according to coefficient and the frequency ratio received before starting, the displacement pulse signals that receives is carried out frequency division, and the pulse of each interruption being sent varying number according to the data file of receiving, and utilize directional ray and taps to export to the axis of oscillation motor driver after the motion, move as requested behind the Stellungsservosteuerung acknowledge(ment) signal that axis of oscillation motor driver and alternating current generator are formed, form sine-wave oscillation and export by speed reduction unit.
To the vibrate displacement signal output of axis of oscillation motor driver through up-down counter and D/A conversion, becomes simulating signal and with oscillograph etc. its correctness is carried out real time monitoring.
When wanting halt system, control industry control and utilize the CAN mouth to say the word, the motor that stops the rotation earlier makes it begin reduction of speed, control industrial computer then and send out failure of oscillations signal to the vibration synchronous generator, make it send low level signal (stop signal) and export to d type flip flop, in next useful pulse arrival, the d type flip flop output low level is closed and door, the vibration of failure of oscillations axle.
We adopt and start or stop axis of oscillation when turning axle raising speed and reductions of speed, mainly are to want axis of oscillation to start and stop all to carry out when rotational speed is low, and it is too big that the detent torque of axis of oscillation is not required, make system stable more and reliably.
Claims (3)
1, dynamic derivative measuring systems under the rotational flow field, it is characterized in that: constitute by axis of oscillation control section and turning axle control section, control industrial computer [16] sends control signal by CAN bus controller [17], one the tunnel gives the electric rotating machine driver [3] of turning axle control section, one the tunnel gives the vibration synchronous generator [15] of axis of oscillation control section, after electric rotating machine driver [3] is received control signal, driven in rotation spindle motor [1], shaft rotating motor [1] driven in rotation motor encoder [2] and first speed reduction unit [4], all pulse producers [6] of first speed reduction unit [4] driven in rotation axle and output rotating shaft [5], the coded signal of electric rotating machine scrambler [2] feed back to electric rotating machine driver [3] and give and the door [19] an input end, the signal of turning axle week pulse producer [6] is given synchronous enabling signal generator [18], after vibration synchronous generator [15] is received control signal, vibration synchronous generator [15] is sent signal and is given axis of oscillation motor driver [9], axis of oscillation motor driver [9] drives axis of oscillation motor [7], axis of oscillation motor [7] drives second speed reduction unit [10] and axis of oscillation motor code-disc [8], second speed reduction unit [10] drives output axis of oscillation [11], the signal feedback of axis of oscillation motor code-disc [8] is given axis of oscillation motor driver [9] and is given up-down counter [12], the signal of up-down counter [12] is given D/A conversion [13], D/A conversion [13] connects waveform monitor [14], synchronous enabling signal generator [18] also given signal by vibration synchronous generator [15], synchronous enabling signal generator [18] sends synchronizing signal and gives another input end with door [19] after receiving the signal that turning axle week pulse producer [6] sends here, give vibration synchronous generator [15] again with the output signal of door [19].
2, the dynamic derivative measuring systems under the rotational flow field according to claim 1 is characterized in that: the turning axle control section is adopted speed control, the axis of oscillation control section is adopted position follower control.
3, the dynamic derivative measuring systems under the rotational flow field according to claim 1 is characterized in that: synchronous enabling signal generator [18] is made of d type flip flop.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008101374228A CN100567928C (en) | 2008-10-29 | 2008-10-29 | Dynamic derivative measuring systems under the rotational flow field |
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| CNB2008101374228A CN100567928C (en) | 2008-10-29 | 2008-10-29 | Dynamic derivative measuring systems under the rotational flow field |
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| CN100567928C true CN100567928C (en) | 2009-12-09 |
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| CN109557901B (en) * | 2018-11-21 | 2021-06-18 | 中国航空工业集团公司哈尔滨空气动力研究所 | Control system for model oscillation test in wind tunnel rotating flow field |
| CN112067245A (en) * | 2020-09-07 | 2020-12-11 | 中国航空工业集团公司沈阳空气动力研究所 | High-speed wind tunnel translational vibration dynamic derivative test device and test method |
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Non-Patent Citations (7)
| Title |
|---|
| 低速风洞旋转流场下滚转振荡动导数试验技术研究. 杜希奇，卜忱，于彦泽，郑鑫杰，王学俭.实验流体力学，第19卷第4期. 2005 |
| 低速风洞旋转流场下滚转振荡动导数试验技术研究. 杜希奇，卜忱，于彦泽，郑鑫杰，王学俭.实验流体力学，第19卷第4期. 2005 * |
| 动导数支架干扰的试验研究. 杜希奇，王学俭，周遹.流体力学实验与测量，第17卷第2期. 2003 |
| 动导数支架干扰的试验研究. 杜希奇，王学俭，周遹.流体力学实验与测量，第17卷第2期. 2003 * |
| 旋转流场下飞机大幅滚转振荡时的动态横向气动特性实验研究. 卜忱，杜希奇，黄丽婧，谷元玲.实验流体力学，第22卷第1期. 2008 |
| 飞行器纵向阻尼动导数直接测量实验研究. 卜忱，杜希奇，王学俭.实验流体力学，第19卷第1期. 2005 |
| 飞行器纵向阻尼动导数直接测量实验研究. 卜忱，杜希奇，王学俭.实验流体力学，第19卷第1期. 2005 * |
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