CN102494908A - Servo-motor aerodynamic load analog device of aircraft landing gear folding and unfolding - Google Patents
Servo-motor aerodynamic load analog device of aircraft landing gear folding and unfolding Download PDFInfo
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- CN102494908A CN102494908A CN2011103660847A CN201110366084A CN102494908A CN 102494908 A CN102494908 A CN 102494908A CN 2011103660847 A CN2011103660847 A CN 2011103660847A CN 201110366084 A CN201110366084 A CN 201110366084A CN 102494908 A CN102494908 A CN 102494908A
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- undercarriage
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Abstract
The invention discloses a servo-motor aerodynamic load analog device of aircraft landing gear folding and unfolding. The device comprises: a test bench (1), a landing gear (2), a jackstay actuator cylinder (3) connected on the landing gear (2), a support frame (4), an aerodynamic load following apparatus and an aerodynamic load analog device. The aerodynamic load following apparatus controls an aerodynamic load direction in a landing gear folding and unfolding process. The aerodynamic load analog device controls a size of the aerodynamic load in the landing gear folding and unfolding process. The servo-motor aerodynamic load analog device provided in the invention has a reasonable structure. An automation degree is high and operation is convenient. The device is suitable for various kinds of folding and unfolding simulation detection of the aircraft landing gear and can provide an accurate detection result for the aircraft landing gear design and research and development.
Description
Technical field
The present invention relates to a kind of aerodynamic loading analogue means, particularly a kind of servomotor aerodynamic loading analogue means of undercarriage folding and unfolding.
Background technology
For improving the aerodynamic force in the aircraft flight, modern aircraft common design is a retractable undercarriage, and is when aloft flying that gear up is inner at fuselage or wing, taking off, will gear down bear landing load in the landing process.That need accomplish undercarriage aloft when therefore, aircraft flies packs up and puts down action.Because the influence of air resistance, undercarriage can receive the influence of aerodynamic force when folding and unfolding, and this aerodynamic force level is uniformly distributed on the undercarriage, influences the draw-in and draw-off function of pressurized strut of undercarriage strut and uplock.Therefore, in undercarriage design development, need the aerodynamic loading analogue means that it is carried out the normal operating position of folding and unfolding test with the simulation undercarriage.
At present, in the undercarriage control test, the simulation loading of aerodynamic loading is the difficult point of test always; Its difficulty is to guarantee the horizontal direction of aerodynamic loading and the size of simulation load at any time that developed country generally adopts undercarriage modern designs technology for the research comparative maturity of landing-gear system; The simulation test of taking off, landing among undercarriage is installed on wind-tunnel; This test method is comparatively near the true operating position of undercarriage, and test findings but is tested costly accurately and reliably; And the construction period is long, should not carry out at short notice.
Domestic research for the undercarriage control test is generally carried out under no wind-tunnel condition.Because the power that undercarriage receives in true folding and unfolding process is a distributed force system; Simulation is very difficult in test; Therefore generally this distributed force system is simplified, application hinge moment equivalence principle is reduced to one or several concentrated force with this aerodynamic loading and puts on the undercarriage.Difference according to test unit mainly is divided in following two:
(a) hydraulic servo pressurized strut loading scheme
This scenario-frame is comparatively simple, and the tracking performance of load simulation is better, but its weak point is having relatively high expectations to hydraulic actuator.The first, bigger to the pressurized strut dimensional requirement, the too small folding and unfolding that can't provide enough strokes to be used for undercarriage of pressurized strut, the excessive installation of pressurized strut possibly produce interference; The second, need to build a whole set of complete hydraulic servo control system, the test period is longer, drops into bigger.
(b) mass-cam-slide rail loading scheme
This scheme aerodynamic loading is comparatively near truth, and loading direction property is good, but its weak point following points: the first, structural design is comparatively complicated, and wire rope quantity too much causes being prone to producing interference with undercarriage; The second, it is corresponding with it to design unique cam face according to the size of aerodynamic loading on the undercarriage, possibly can't design corresponding cam corresponding to some load working condition and satisfy it and load requirement; The 3rd, there is certain potential safety hazard in mass along with the folding and unfolding meeting generation of undercarriage is rocked in the loading.
Therefore, necessary on the basis of prior art to the deficiency of the required aerodynamic loading analogue means of the test of undercarriage folding and unfolding both at home and abroad at present, design a kind of aerodynamic loading analogue means that can accomplish the test of simulated aircraft undercarriage control.
Summary of the invention
Goal of the invention: the objective of the invention is in order to solve the deficiency of prior art; A kind of reasonable in design, automaticity height, easy to operate are provided; Can accurately control the aerodynamic loading size and Orientation, be used for the aerodynamic loading analogue means of simulated aircraft undercarriage control.
Technical scheme: in order to realize above purpose, the technical scheme that the present invention taked is:
A kind of servomotor aerodynamic loading analogue means of undercarriage folding and unfolding; It comprises: test-bed, undercarriage, be connected strut pressurized strut, bracing frame, aerodynamic loading following device and aerodynamic loading analogue means on the undercarriage; Described aerodynamic loading following device comprises the ball screw that is installed on the bracing frame, be installed in nut on the ball screw, servomotor, lifting table, angular transducer; Wherein the ball screw lower end is equipped with shaft coupling and is connected with the servomotor output shaft; Lifting table is fixedly installed on the nut, moves up and down with nut; Described aerodynamic loading analogue means comprises two cover load maintainers; Every suit load maintainer includes No. two servomotors, speed reduction unit, disk, wire rope; Described No. two servomotors are installed on the speed reduction unit, and speed reduction unit is fixedly mounted on the lifting table, and disk is installed on the output terminal of speed reduction unit; Wire rope one end is on disk, and the other end of wire rope is connected on the undercarriage.
Servomotor aerodynamic loading analogue means provided by the invention, in the simulation test procedure, the suffered aerodynamic loading of undercarriage is provided by the aerodynamic loading analogue means, and the suffered aerodynamic loading direction of undercarriage is controlled by the aerodynamic loading following device.
As preferred version, the servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding, the upper end of described ball screw is fixed on the channel-section steel frame through ring flange.Described channel-section steel frame front end and test-bed are welded as a whole, and can avoid the effect of jitter test accuracy of bracing frame in the process of the test.
As preferred version; The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding; 4 guide rail bearings are installed on the described supporting seat; The lower end of 4 guide rails is installed in respectively on 4 guide rail bearings, and the upper end of 4 guide rails is connected on the channel-section steel frame by nut after passing lifting table respectively; As further preferred version, described guide rail bearing top is mounted with the spring that is used to cushion lifting table, and 4 straight line flange bearings also are installed on the described lifting table, and 4 guide rails pass the straight line flange bearing respectively after passing lifting table again.Can guarantee that when lifting table moves up and down along with ball screw lifting table remains horizontality after 4 guide rails are installed, thereby can control the size and Orientation of aerodynamic loading well.
As preferred version; Above-described aerodynamic loading analogue means; Two cover load maintainers of described load simulated device are that symmetric points are installed on the lifting table with the lifting table center; The wire rope of such two covers in the load maintainers can symmetry the both sides that are connected undercarriage, thereby the influence that pull of steel wire can not produce moment of torsion to undercarriage in can warranty test.
As preferred version; The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding, described bracing frame bottom is equipped with height-adjustable foot bolt, through level meter adjustment foot bolt height; Make bracing frame be in horizontality, improve the accuracy of simulation test.
As preferred version; The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding; Undercarriage and fuselage hinged place are connected on the single, double fork auricular branch seat; On the single, double fork auricular branch seat oscillating bearing is installed, thereby can guarantees that undercarriage leg and anchor clamps intersection point directly do not bear moment, and by each intersection point dynamic balance.
The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding, described strut pressurized strut connects hydraulic power system, for the folding and unfolding of undercarriage provides power source.
The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding, described angular transducer is installed in the pin joint place of undercarriage and fuselage, is used for measure landing gear folding and unfolding angle, thereby controls the adjustable height of lifting table.
Beneficial effect: the servomotor aerodynamic loading analogue means of undercarriage folding and unfolding provided by the invention compared with prior art has the following advantages:
1. invent the servomotor aerodynamic loading analogue means of the undercarriage folding and unfolding that provides; Reasonable in design; Easy to operate, the aerodynamic loading direction in the aerodynamic loading following device control undercarriage control process that is designed, aerodynamic loading size in the aerodynamic loading analogue means control undercarriage control process; Wherein two cover aerodynamic loading following devices respectively independently symmetry be installed in the undercarriage both sides; Guaranteed the influence that pull of steel wire can not produce moment of torsion to undercarriage in the test, aerodynamic loading direction and aerodynamic loading size is accurate in the process of the test, and test findings is accurate.
2. servomotor aerodynamic loading analogue means provided by the invention, the quantity of wire rope is reduced to 2 by original 12, and it is simple and clear that wire rope is pullled circuit, can reduce possibility of interfering each other in the process of the test, improves the accuracy of testing.
3. servomotor aerodynamic loading analogue means provided by the invention adopts the direction and the size of servomotor control load, and than the experimental program of tradition employing hydraulic actuator, response speed is faster, and the load precision is higher.
4, servomotor aerodynamic loading analogue means automaticity provided by the invention is high; The scope of application is extensive, and applicable to multi-form undercarriage, all operations action all has computer to control automatically; Need not manually-operated in the test, reduced the possibility of cost of labor and test maloperation.
Description of drawings
Fig. 1 is the structural representation of servomotor aerodynamic loading analogue means provided by the invention when folding and unfolding is tested.
Fig. 2 is the structural representation of aerodynamic loading following device and aerodynamic loading analogue means among Fig. 1.
Embodiment:
Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the present invention; Should understand these embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
As depicted in figs. 1 and 2; A kind of servomotor aerodynamic loading analogue means of undercarriage folding and unfolding; It comprises: test-bed 1, undercarriage 2, be connected strut pressurized strut 3, bracing frame 4, aerodynamic loading following device and aerodynamic loading analogue means on the undercarriage 2; Described strut pressurized strut 3 connects hydraulic power system provides power for it; Described aerodynamic loading following device comprises the ball screw 5 that is installed on the bracing frame 4, be installed in nut 6 on the ball screw 5, servomotor 7, lifting table 8, angular transducer; Wherein ball screw 5 lower ends are equipped with shaft coupling and are connected with servomotor 7 output shafts, and lifting table 8 is fixedly installed on the nut 6, moves up and down with nut 6; Described aerodynamic loading analogue means comprises two cover load maintainers; Every suit load maintainer includes No. two servomotors 9, speed reduction unit 10, disk 11, wire rope 12; Described No. two servomotors 9 are installed on the speed reduction unit 10, and speed reduction unit 10 is fixedly mounted on the lifting table 8, and disk 11 is installed on the output terminal of speed reduction unit 10; Wire rope 12 1 ends are on disk 11, and the other end of wire rope 12 is connected on the undercarriage 2.
The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding, the upper end of described ball screw 5 is fixed on the channel-section steel frame 13 through ring flange.
The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding; 4 guide rail bearings 14 are installed on the described bracing frame 4; The lower end of 4 guide rails 15 is installed in respectively on 4 guide rail bearings 14; The upper end that 17,4 guide rails 15 of 4 straight line flange bearings are installed on the lifting table 8 passes lifting table 8 respectively and 4 straight line flange bearings 17 backs are connected on the channel-section steel frame 13 by nut, and is mounted with the spring 16 that is used to cushion lifting table 8 on described guide rail bearing 14 tops.
Above-described aerodynamic loading analogue means; Two cover load maintainers of described load simulated device are that symmetric points are installed on the lifting table 8 with the center of lifting table 8; The both sides that are connected undercarriage 2 of wire rope 12 symmetries in the two cover load maintainers, but the pulling force of wire rope 12 can be to the influence of undercarriage 2 generation moments of torsion in the warranty test.
The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding, described bracing frame 4 bottoms are equipped with height-adjustable foot bolt 18.
The servomotor aerodynamic loading analogue means of above-described undercarriage folding and unfolding, described undercarriage 2 is connected on the single, double fork auricular branch seat with the fuselage hinged place, on the single, double fork auricular branch seat oscillating bearing is installed.
The servomotor aerodynamic loading analogue means real work principle of undercarriage folding and unfolding provided by the invention is: before on-test; Undercarriage 2 is in down state, manually controls lifting table 8 height and is in horizontality until wire rope 12, when on-test; The hydraulic system of undercarriage 2 provides hydraulic oil; Promote strut pressurized strut 3 toward overhanging, undercarriage 2 is just along up packing up gradually with the pin joint rotation of fuselage, in this process; No. one servomotor 7 rotates; Drive ball screw 5 by shaft coupling and rotate together, the lifting table 8 that be fixed on the nut 6 this moment moves upward along with the rotation of ball screw 5, and a servomotor 7 is by its rotating speed of angle signal control that is installed on the angular transducer output on the undercarriage 2; Make undercarriage 2 wire rope 12 in the process of packing up be in horizontality always, guarantee that the aerodynamic loading direction is in horizontal direction.Meanwhile; No. two servomotors 9 that are installed in the speed reduction unit 10 on the lifting table 8 and are installed on the speed reduction unit 10 move upward with lifting table 8; Pack up in the process at undercarriage 2, wire rope 12 other ends that speed reduction unit 10 output terminal disks 11 twine are connected on the undercarriage 2, and disk 11 pulling wire rope 12 are given undercarriage 2 horizontal pulls; Thereby carry out load simulated to stop the motion of packing up of undercarriage 2; Wherein No. two servomotors 9 length that can control the wire rope 12 that disk 11 twines is adjusted the aerodynamic loading size, when undercarriage 2 is packed up to nominal angle, runs into uplock and locks, and pack up process and accomplish this moment.Undercarriage 2 puts down process and to pack up process opposite then, puts down fully and locks smoothly up to undercarriage 2, and a folding and unfolding process finishes.
The servomotor aerodynamic loading analogue means of undercarriage folding and unfolding provided by the invention can accurately be used for the action of simulated aircraft undercarriage control, for undercarriage designs research and development testing result accurately is provided.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. the servomotor aerodynamic loading analogue means of a undercarriage folding and unfolding; It is characterized in that; It comprises: test-bed (1), undercarriage (2), be connected strut pressurized strut (3), bracing frame (4), aerodynamic loading following device and aerodynamic loading analogue means on the undercarriage (2); Described aerodynamic loading following device comprises the ball screw (5) that is installed on the bracing frame (4), is installed in nut (6), a servomotor (7), lifting table (8), angular transducer on the ball screw (5); Wherein ball screw (5) lower end is equipped with shaft coupling and is connected with servomotor (7) output shaft; Lifting table (8) is fixedly installed on the nut (6), moves up and down with nut (6); Described aerodynamic loading analogue means comprises two cover load maintainers; Every suit load maintainer includes No. two servomotors (9), speed reduction unit (10), disk (11), wire rope (12); Described No. two servomotors (9) are installed on the speed reduction unit (10), and speed reduction unit (10) is fixedly mounted on the lifting table (8), and disk (11) is installed on the output terminal of speed reduction unit (10); Wire rope (12) one ends are on disk (11), and the other end of wire rope (12) is connected on the undercarriage (2).
2. the servomotor aerodynamic loading analogue means of undercarriage folding and unfolding according to claim 1 is characterized in that the upper end of described ball screw (5) is fixed on the channel-section steel frame (13) through ring flange.
3. the servomotor aerodynamic loading analogue means of undercarriage folding and unfolding according to claim 1; It is characterized in that; 4 guide rail bearings (14) are installed on the described bracing frame (4); The lower end of 4 guide rails (15) is installed in respectively on 4 guide rail bearings (14), and the upper end of 4 guide rails (15) is passed lifting table (8) back respectively and is connected on the channel-section steel frame (13) by nut.
4. aerodynamic loading analogue means according to claim 3 is characterized in that, described guide rail bearing (14) top is mounted with the spring (16) that is used to cushion lifting table (8).
5. aerodynamic loading analogue means according to claim 4 is characterized in that, 4 straight line flange bearings (17) also are installed on the described lifting table (8), and 4 guide rails (15) pass straight line flange bearing (17) respectively after passing lifting table (8).
6. aerodynamic loading analogue means according to claim 1; It is characterized in that; Two cover load maintainers of load simulated device are that symmetric points are installed on the lifting table (8) with the center of lifting table (8), the both sides that are connected undercarriage (2) of wire rope (12) symmetry in the two cover load maintainers.
7. the servomotor aerodynamic loading analogue means of undercarriage folding and unfolding according to claim 1 is characterized in that, described bracing frame (4) bottom is equipped with height-adjustable foot bolt (18).
8. the servomotor aerodynamic loading analogue means of undercarriage folding and unfolding according to claim 1 is characterized in that, described undercarriage (2) is connected on the single, double fork auricular branch seat with the fuselage hinged place, on the single, double fork auricular branch seat oscillating bearing is installed.
9. the servomotor aerodynamic loading analogue means of undercarriage folding and unfolding according to claim 1 is characterized in that, described strut pressurized strut (3) connects hydraulic power system.
10. according to the servomotor aerodynamic loading analogue means of each described undercarriage folding and unfolding of claim 1 to 9, it is characterized in that described angular transducer is installed in the pin joint place of undercarriage (2) and fuselage.
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| CN2011103660847A CN102494908A (en) | 2011-11-18 | 2011-11-18 | Servo-motor aerodynamic load analog device of aircraft landing gear folding and unfolding |
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| CN2011103660847A CN102494908A (en) | 2011-11-18 | 2011-11-18 | Servo-motor aerodynamic load analog device of aircraft landing gear folding and unfolding |
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| CN103033380A (en) * | 2012-12-11 | 2013-04-10 | 中国飞机强度研究所 | Landing gear retractable test loading device and method |
| CN104344958A (en) * | 2014-10-29 | 2015-02-11 | 西安航空制动科技有限公司 | Simulation test method for working condition of airplane wheel bearing in launching/launching stopping process |
| CN105606357A (en) * | 2016-03-28 | 2016-05-25 | 中国飞机强度研究所 | Aircraft static strength test loading device |
| CN105806600A (en) * | 2016-03-10 | 2016-07-27 | 中国北方车辆研究所 | Hydro-pneumatic spring testbed position hydraulic adjustment device with locking function |
| CN106240841A (en) * | 2016-07-07 | 2016-12-21 | 中国飞机强度研究所 | A kind of gear test charger |
| CN106965953A (en) * | 2017-03-31 | 2017-07-21 | 南京航空航天大学 | A kind of Retracting Or Lowering Aerodynamic Loads On Landing Gear analogue means and its loading method |
| CN107101811A (en) * | 2017-04-18 | 2017-08-29 | 西北工业大学 | A kind of aircraft main landing gear side brace bonding pad bearer properties experiment loading unit |
| CN107215480A (en) * | 2017-05-23 | 2017-09-29 | 中国民航大学 | A kind of Aircraft landing gear system brake dynamic simulation test bed frame |
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| CN112362095A (en) * | 2020-09-30 | 2021-02-12 | 成都飞机工业（集团）有限责任公司 | Undercarriage equipment and detection integration equipment |
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| CN105606357A (en) * | 2016-03-28 | 2016-05-25 | 中国飞机强度研究所 | Aircraft static strength test loading device |
| CN105606357B (en) * | 2016-03-28 | 2019-02-05 | 中国飞机强度研究所 | A kind of aircraft test of static strength loading device |
| CN106240841A (en) * | 2016-07-07 | 2016-12-21 | 中国飞机强度研究所 | A kind of gear test charger |
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Application publication date: 20120613 |