CN110501146B - Simulation and measurement device and measurement method for simulating lift force - Google Patents
Simulation and measurement device and measurement method for simulating lift force Download PDFInfo
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- CN110501146B CN110501146B CN201910643438.4A CN201910643438A CN110501146B CN 110501146 B CN110501146 B CN 110501146B CN 201910643438 A CN201910643438 A CN 201910643438A CN 110501146 B CN110501146 B CN 110501146B
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention provides a simulated lift force simulation and measurement device and a measurement method. The invention can realize the simulation of different lifting forces, and the sensor is arranged at the bottom of the hanging basket, thereby eliminating the problem of inaccurate measurement precision caused by the installation of the sensor at the top of the piston.
Description
Technical Field
The invention belongs to the field of landing gear tests, and particularly relates to a simulated lift force simulation and measurement device and a simulated lift force simulation and measurement method for a landing gear.
Background
The undercarriage projecting test is a dynamic test for simulating the sudden extension of an undercarriage when a carrier-based aircraft leaves a ship or is ejected, and at the moment, the aircraft has a certain lift force and a simulated lift device is required to simulate the lift force of the aircraft. For an important parameter in the test process, namely the simulated lift force, the simulated lift force needs to be adjusted according to the actual aircraft lift force, so that a set of device needs to be designed for simulation and measurement.
The existing undercarriage drop test bed simulation lift force measuring device is characterized in that a sensor is arranged at the top of a piston, and the precision of a measuring result is poor due to the inertial load of the piston.
Disclosure of Invention
The invention aims to provide a simulated lift force simulation and measurement device and a simulated lift force measurement method of an undercarriage, which can realize simulation of different lift forces of a carrier-based aircraft. According to the invention, the sensor is arranged at the bottom of the hanging basket, so that the problem of inaccurate measurement precision caused by the fact that the sensor is arranged at the top of the piston rod is solved.
The undercarriage projecting test is carried out on a test bed, lift force simulation is carried out by a simulated lift force simulation and measurement device according to actual test requirements, and then the undercarriage is suddenly extended by controlling an air pressure bearing and release mechanism of the undercarriage or a loading/release mechanism of an ejection rod, so that the dynamic characteristic of the undercarriage when the undercarriage is suddenly extended is simulated.
On one hand, the simulated lift force simulation and measurement device is used for simulating and measuring the simulated lift force of the undercarriage, and comprises a hanging basket 1, a support 2, a lifting mechanism 3, a gas tank, a plurality of simulated lift force measurement units 20 and a plurality of simulated lift force simulation units 30, wherein the support 2 is in a frame shape;
the upper end of the lifting mechanism 3 is fixedly connected with the upper end of the bracket 2, the lower end of the lifting mechanism 3 is mechanically connected with the top of the hanging basket 1 and drives the hanging basket 1 to ascend or descend, and the bottom of the hanging basket 1 is fixedly connected with the undercarriage 4;
each simulated lift force measuring unit 20 is fixedly arranged at the bottom of the hanging basket 1, each simulated lift force simulation unit 30 is respectively arranged at the lower side of one simulated lift force measuring unit 20 and is positioned at two sides of the undercarriage 4, each simulated lift force simulation unit 30 is communicated with a gas tank, the gas tank is used for providing gas for each simulated lift force simulation unit 30, and the simulated lift force simulation units 30 are used for providing simulated lift force for the undercarriage 4; the artificial lift measurement unit 20 is used for measuring the artificial lift provided by the artificial lift simulation unit 30.
Further, the simulated lift force measuring unit 20 comprises a buffer pad 7 and a sensor 6, the sensor 6 is fixedly arranged at the bottom of the hanging basket 1, and the buffer pad 7 is fixedly arranged on one surface of the sensor 6 facing the simulated lift force simulation unit 30.
Further, the sensor 6 is mounted on a mounting seat arranged at the bottom of the hanging basket 1; the sensor 6 is a force transducer, and the cushion pad 7 is a rubber cushion pad; a balancing weight 13 is arranged in the hanging basket 1.
Further, for any of the artificial lift simulating units 30, it includes: the device comprises a piston rod 8, a piston 9 and an imitation lifting cylinder 10, wherein the imitation lifting cylinder 10 is communicated with a gas tank, and the gas tank provides gas into the imitation lifting cylinder 10;
the piston 9 is arranged in the imitation lift cylinder 10 in a sliding manner;
one end of the piston rod 8 is fixedly connected with the piston 9, and the piston 9 slides upwards and vertically to drive the other end of the piston rod 8 to contact with the simulated lift force measuring unit 20 corresponding to the simulated lift force simulation unit 30.
Further, the device comprises four simulated lift force simulation units 30 and four simulated lift force measurement units 20, the hanging basket 1 is of a square structure, and the simulated lift force measurement units 20 are respectively arranged at four corner points of the bottom of the hanging basket 1.
Further, the lifting mechanism 3 includes a guide frame 31, a chain hoist 32 and a hoist chain 33,
the chain hoist 32 is fixedly connected with the upper end of the bracket 2;
the guide frame 31 is connected with the chain hoist 32 through a chain, and a chain transmission mechanism of the chain hoist 32 rotates to drive the guide frame 31 to ascend or descend;
the upper end of the sling chain 33 is fixedly connected with the guide frame 31, and the lower end of the sling chain 33 is fixedly connected with the hanging basket 1.
Further, the device also comprises an air pressure bearing and releasing mechanism and an air pressure bearing and releasing bearing platform 5, wherein the air pressure bearing and releasing bearing platform 5 supports the landing gear 4, and the air pressure bearing and releasing mechanism controls the air pressure bearing and releasing bearing platform 5 to withdraw relative to the landing gear 4 when the simulated lift force in the landing gear carrier-off protruding test is simulated and measured.
Further, the apparatus also comprises a load/release mechanism 40, the landing gear 4 comprising a projecting rod 41, a buffer strut 42 and a wheel 43;
the loading/releasing mechanism 40 locks or releases the eject lever 41;
one end of the ejection rod 41 is mechanically connected to the buffer strut 42, and the other end is mechanically connected to the loading/releasing mechanism 40;
the damping strut 42 is mechanically connected to the bottom of the gondola 1 at one end and to the wheel 43 at the other end.
In another aspect, a method for simulating lift force of a landing gear for performing a ship-off protrusion test by using the simulation lift force simulation and measurement device comprises the following steps:
installing an undercarriage 4, and installing the undercarriage 4 at the bottom of the hanging basket 1;
controlling the lifting mechanism 3 to drive the hanging basket 1 to descend, so that the undercarriage 4 descends until the wheel 43 of the undercarriage 4 is contacted with the upper end face of the air pressure bearing and releasing bearing platform 5;
adjusting the gas pressure in the artificial lift cylinder 10 to enable the piston 9 to slide so as to drive the piston rod 8 to move, enabling the upper end face of the piston rod 8 to be in contact with the cushion pad 7, and continuously adjusting the gas pressure in the artificial lift cylinder 10 until the value of the sensor 6 is the set artificial lift value;
controlling the lifting mechanism 3 to drive the hanging basket 1 to continuously descend so as to compress the buffer support columns 42 of the landing gear 4 to a specified compression amount;
and controlling an air pressure bearing and releasing mechanism to enable the air pressure bearing and releasing force bearing platform 5 to be far away from the airplane wheel 43, reading the numerical value of the sensor 6 at the moment, and recording the numerical value as a dynamic response value simulating the lift force.
In a further aspect, a method of simulating lift force simulation and measurement of a landing gear for a catapult-assisted extension test using a simulated lift force simulation and measurement apparatus as described above, the method comprising:
installing an undercarriage 4, and installing the undercarriage 4 in the bottom of the hanging basket 1 in a hanging manner;
a shoot lever 41 that controls the load/release mechanism 40 to lock the landing gear 4;
adjusting the gas pressure in the artificial lift cylinder 10 to enable the piston 9 to slide so as to drive the piston rod 8 to move, enabling the upper end face of the piston rod 8 to be in contact with the cushion pad 7, and continuously adjusting the gas pressure in the artificial lift cylinder 10 until the value of the sensor 6 is the set artificial lift value;
controlling the load/release mechanism 40 to release the ejection lever 41 of the landing gear 4; and reading the value of the sensor 6 at the moment, and recording the value as a dynamic response value of the simulated lift force.
The invention has the technical effects that:
by adjusting the gas pressure in the simulated lifting cylinder and further adjusting the pressure borne by the piston, different simulated lifting force values can be set, and simulation of different lifting forces of the carrier-based aircraft is realized.
A rubber cushion pad is arranged at the head of the sensor, so that the force sensor is prevented from being in rigid contact with a piston rod of the imitated lifting cylinder, and the service life of the device is prolonged.
The sensor is arranged at the bottom of the hanging basket, which is equivalent to that the mass of the piston rod can be reduced by about 20%, the influence caused by the inertial load of the piston rod is reduced, and the measurement precision of the simulated lifting force is improved.
The simulated lifting cylinder is communicated with the gas tank, the required pressure is calculated according to the test requirement by the pressure area of the piston in the simulated lifting cylinder, the gas tank is communicated with the outside of the simulated lifting cylinder, the piston rod moves to generate displacement in the test process, the change of the volume of the generated overall gas cavity is negligible, and the simulated lifting device can provide constant simulated lifting force in the movement range of the piston rod.
The simulation and measurement device can be applied to the ship-borne aircraft undercarriage projection test.
And adjusting related parameters of the lifting simulating device according to the test result so as to ensure that the lifting simulating force provided by the lifting simulating device is consistent with the real condition.
Drawings
FIG. 1 is a schematic view of the structure of a simulated lift simulation and measurement apparatus of the landing gear of the present invention;
FIG. 2 is a schematic structural diagram of a simulated lift force simulation unit and a simulated lift force measurement unit of the invention;
FIG. 3 is a structural side view of the landing gear of the present invention;
description of reference numerals: 1-hanging basket, 2-support, 3-lifting mechanism, 4-landing gear, 5-pneumatic bearing and releasing bearing platform, 6-sensor, 7-buffer pad, 8-piston rod, 9-piston, 10-imitation lifting cylinder, 20-imitation lift force measuring unit, 30-imitation lift force simulating unit, 11-pipeline, 12-valve, 13-counterweight block, 31-guide frame, 32-loop chain lifter, 33-hanging chain, 40-loading/releasing mechanism, 41-ejection rod, 42-buffer support column and 43-airplane wheel.
Detailed Description
The invention is described below with reference to the accompanying drawings and the detailed description.
Example 1
Fig. 1 is a schematic view of the structure of a simulated lift simulation and measurement device of the landing gear of the present invention. As shown in fig. 1, the simulated lift force simulation and measurement device of the landing gear includes a gondola 1, a support 2, a lifting mechanism 3, a gas tank (not shown), a plurality of simulated lift force measurement units 20, and a plurality of simulated lift force simulation units 30. The plurality of simulated lift force simulation units 30 are respectively and correspondingly arranged on the lower side of the simulated lift force measurement unit 20 and are positioned on two sides of the undercarriage 4, the simulated lift force simulation units 30 are communicated with the gas tank, and the gas tank provides gas for the simulated lift force simulation units 30. The plurality of simulated lift force measuring units 20 are arranged at the bottom of the hanging basket 1 and vertically correspond to the simulated lift force simulation units 30, and the simulated lift force measuring units 20 measure the simulated lift force provided by the simulated lift force simulation units 30.
In this embodiment, the simulated lift force simulation unit 30 may provide different simulated lift force values through the gas provided by the gas tank, so as to realize simulation of different lift forces of the carrier aircraft, and the simulated lift force measurement unit 20 may measure the simulated lift force provided by the simulated lift force simulation unit 30 in real time.
Further, as shown in fig. 1, the support 2 is in a frame shape, the upper end of the lifting mechanism 3 is mechanically connected with the upper frame of the support 2, the lower end of the lifting mechanism 3 is mechanically connected with the top of the nacelle 1, and the bottom of the nacelle 1 is fixedly connected with the landing gear 4. The hanging basket 1 is of a square structure, and a balancing weight 13 is arranged in the hanging basket 1. And adjusting the weight of the balancing weight 13 to ensure that the weight of a projecting system consisting of the hanging basket 1, the undercarriage 4 and the balancing weight 13 meets the test requirement.
The simulated lift force simulation and measurement device of the embodiment comprises four simulated lift force simulation units 30 and four simulated lift force measurement units 20, and only two simulated lift force simulation units 30 and two simulated lift force measurement units 20 on the front side are shown in fig. 1. Four artificial lift measurement units 20 are arranged below four corner points of the bottom of the gondola 1.
Further, the lifting mechanism 3 comprises a guide frame 31, a chain hoist 32 and a hanging chain 33, wherein the chain hoist 32 is fixedly connected with the support 2; the guide frame 31 is connected with the chain hoist 32 through a chain, and a chain transmission mechanism of the chain hoist 32 rotates to drive the guide frame 31 to ascend or descend; the upper end of the sling chain 33 is fixedly connected with the guide frame 31, and the lower end of the sling chain 33 is fixedly connected with the hanging basket 1. The chain transmission mechanism of the chain hoist 32 moves to drive the guide frame 31 to ascend or descend, and then the hanging basket 1 is driven to ascend or descend by the hanging chain 33.
Fig. 2 is a schematic diagram of the principle of the simulated lift force simulation unit and the simulated lift force measurement unit of the invention, and as shown in fig. 2, the simulated lift force measurement unit 20 comprises a cushion pad 7 and a sensor 6, the sensor 6 is fixedly arranged at the bottom of the hanging basket 1, and the cushion pad 7 is fixedly arranged at the bottom of the sensor 6. Specifically, the sensor 6 is mounted on a mounting seat arranged at the bottom of the hanging basket 1; the sensor 6 is a force transducer and the cushion 7 is a rubber cushion. As shown in fig. 1 and 2, the sensors 6 of the imitation lift measurement unit 20 are arranged below four corner points of the bottom of the gondola 1.
In the embodiment, the rubber cushion pad is arranged at the head of the sensor 6, so that the force sensor is prevented from being in rigid contact with the piston rod of the imitation lifting cylinder, and the service life of the device is prolonged. The sensor 6 is arranged at the bottom of the hanging basket, compared with the prior art, the mass of the piston rod is reduced by about 20%, the influence caused by the inertial load of the piston rod can be reduced, and the measurement precision of the simulated lifting force is improved.
Further, as shown in fig. 2, the artificial lift simulation unit 30 includes a piston rod 8, a piston 9 and an artificial lift cylinder 10, the artificial lift cylinder 10 is communicated with a gas tank, and the gas tank provides gas into the artificial lift cylinder 10; the piston 9 is arranged in the imitation lift cylinder 10 in a sliding manner; one end of the piston rod 8 is fixedly connected with the piston 9, and the piston 9 vertically slides upwards to drive the other end of the piston rod 8 to contact with the simulated lift force measuring unit 20. Specifically, the imitation lift cylinder 10 is communicated with a gas tank, the gas tank provides gas into the imitation lift cylinder 10 through a pipeline 11, a valve 12 controls the on-off of the gas in the pipeline 11, and a regulating valve 12 controls the gas provided by the gas tank into the imitation lift cylinder 10, so that the gas pressure in the imitation lift cylinder 10 can be regulated.
In the embodiment, the gas tank can provide gas with approximately constant pressure in the artificial lift cylinder 10, the piston 9 is pushed to slide upwards, the piston rod 8 is driven to move, the other end of the piston rod 8 is in contact with the cushion pad 7 of the artificial lift force measuring unit 20, the gas pressure in the artificial lift cylinder 10 is adjusted, the pressure borne by the piston 9 and the piston rod 8 is adjusted, the pressure borne by the cushion pad 7 and the sensor 6 is further adjusted, the data of the sensor 6 is read, and the set artificial lift force value is obtained when the data of the sensor 6 is a set value. Different simulated lift values can be set by adjusting the gas pressure in the simulated lift cylinder 10, and simulation of different lift values of the carrier-based aircraft is realized.
Further, as shown in fig. 1, the simulated lift force simulation and measurement device further includes an air pressure bearing and release mechanism (not shown) and an air pressure bearing and release bearing platform 5, the air pressure bearing and release bearing platform 5 supports the landing gear 4, and the air pressure bearing and release mechanism controls the air pressure bearing and release bearing platform 5 to withdraw from the landing gear 4.
Further, the simulated lift simulation and measurement device further comprises a load/release mechanism 40. Figure 3 is a side view of the landing gear structure of the present invention, as shown in figure 3, the landing gear including an ejection lever 41, a damping strut 42 and a wheel 43. One end of the ejection rod 41 is mechanically connected to the buffer strut 42, and the other end is mechanically connected to the loading/releasing mechanism 40; the damping strut 42 is mechanically connected to the bottom of the gondola 1 at one end and to the wheel 43 at the other end. The loading/releasing mechanism 40 locks or releases the eject lever 41.
Example 2
The off-ship protrusion test is carried out by using the simulated lift simulation and measurement device as described in the embodiment 1, and the off-ship protrusion test comprises the following steps:
step 1: and (4) mounting an undercarriage 4, and mounting the undercarriage 4 at the bottom of the nacelle 1.
Step 2: the lifting mechanism 3 is controlled to drive the hanging basket 1 to descend, and the undercarriage 4 is driven to descend until the wheel 43 of the undercarriage 4 is in contact with the upper end face of the air pressure bearing and releasing bearing platform 5.
And step 3: and adjusting the gas pressure in the imitation lift cylinder 10 to enable the piston 9 to slide so as to drive the piston rod 8 to move, enabling the upper end surface of the piston rod 8 to be in contact with the cushion pad 7, and continuously adjusting the gas pressure in the imitation lift cylinder 10 until the value of the sensor 6 is the set imitation lift value.
And 4, step 4: the lifting mechanism 3 is adjusted to drive the hanging basket 1 to continuously descend, the self weight of the hanging basket 1, the balancing weight 13 and the undercarriage 4 loads the undercarriage 4, and the buffer support columns 42 of the undercarriage 4 are loaded to the specified compression amount.
And 5: and controlling an air pressure bearing and releasing mechanism to enable the air pressure bearing and releasing bearing platform 5 to withdraw quickly, extending a buffer strut 42 of the undercarriage 4 to drive the wheel 43 at the lower part to protrude downwards, reading the value of the sensor 6 at the moment, and recording the value as a dynamic response value simulating the lifting force. The bearing platform 5 is quickly evacuated by air pressure bearing and releasing, the wheel 43 is driven by the buffer support 42 to protrude downwards, the buffer support 42 can generate acting force to act on the hanging basket 1, and the value of the sensor 6 is changed.
Example 3
The catapult-assisted protrusion test was performed using the simulated lift simulation and measurement apparatus as described in example 1, comprising the steps of:
step 1: and (4) installing an undercarriage 4, and installing the undercarriage 4 at the bottom of the hanging basket 1 in a suspended mode.
Step 2: the control load/release mechanism 40 locks the ejection lever 41.
And step 3: and adjusting the gas pressure in the imitation lifting cylinder 10, so that the piston 9 slides to drive the piston rod 8 to move, the upper end surface of the piston rod 8 is in contact with the cushion pad 7, and the gas pressure in the imitation lifting cylinder 10 is continuously adjusted until the value of the sensor 6 is the set imitation lifting value.
And 4, step 4: the loading/release mechanism 40 is controlled to automatically release the ejection lever 41 of the landing gear 4, and the landing gear 4 is ejected and protruded. And reading the value of the sensor 6 at the moment, and recording the value as a dynamic response value of the simulated lift force.
The invention has the technical effects that: when the simulated lift force simulation and measurement device provided by the invention is used for simulating and measuring the simulated lift force, the load measured by the force measuring sensor represents the provided lift force, and actually, the lift force provided by the simulated lift force simulation and measurement device is different from the measured load, the influence of the friction force of the piston is ignored, and the difference is the inertial load caused by the impact of the piston rod.
Conventionally, the sensor is installed on the top of the piston rod, and the stress relation 1 is as follows
P x S+f+F＝(M+m)x a
The sensor is arranged at the bottom of the hanging basket, and the stress relation 2 of the sensor is as follows
P x S+f+F＝M x a
P is the internal air pressure of the simulated lift cylinder, S is the compressed area of the piston rod, F is the friction force of the piston, F is the load measured by the force transducer, M is the mass of the piston rod, M is the mass of the force transducer, and a is the acceleration of the piston rod.
In the past, the load cell is arranged at the top of the piston rod in the simulated lift force test, the sensor is arranged at the bottom of the hanging basket in the test scheme provided by the invention, which is equivalent to the reduction of the mass of the piston rod, and the reduced inertial load is the inertial force borne by the load cell and has the size of mxa. In addition, the rubber pad is arranged on the sensor, so that hard impact can be prevented, the inertial load caused by overlarge instantaneous acceleration is reduced, and the measurement accuracy of the simulated lifting force can be improved by selecting the force measuring sensor with smaller mass.
Claims (8)
1. A simulated lift force simulation and measurement device for simulation and measurement of a simulated lift force of a landing gear is characterized by comprising a hanging basket (1), a bracket (2), a lifting mechanism (3), a gas tank, a plurality of simulated lift force measurement units (20) and a plurality of simulated lift force simulation units (30),
the bracket (2) is in a frame shape;
the upper end of the lifting mechanism (3) is fixedly connected with the upper end of the support (2), the lower end of the lifting mechanism (3) is mechanically connected with the top of the hanging basket (1) and drives the hanging basket (1) to ascend or descend, and the bottom of the hanging basket (1) is fixedly connected with the undercarriage (4);
each simulated lift measuring unit (20) is fixedly arranged at the bottom of the hanging basket (1), each simulated lift simulating unit (30) is arranged on the lower side of one simulated lift measuring unit (20) and located on two sides of the undercarriage (4), each simulated lift simulating unit (30) is communicated with a gas tank, the gas tank is used for providing gas for each simulated lift simulating unit (30), and each simulated lift simulating unit (30) is used for providing simulated lift for the undercarriage (4); the artificial lift measurement unit (20) is used for measuring the artificial lift provided by the artificial lift simulation unit (30);
the bionic lift force measuring unit (20) comprises a sensor (6), and the sensor (6) is fixedly arranged at the bottom of the hanging basket (1);
the device also comprises an air pressure bearing and releasing mechanism and an air pressure bearing and releasing bearing platform (5), wherein the air pressure bearing and releasing bearing platform (5) supports the undercarriage (4), and when the simulated lift force in the undercarriage ship-off protruding test is simulated and measured, the air pressure bearing and releasing mechanism controls the air pressure bearing and releasing bearing platform (5) to withdraw relative to the undercarriage (4);
the device further comprises a load/release mechanism (40), the landing gear (4) comprising an ejection lever (41), a damping strut (42) and a wheel (43); the loading/releasing mechanism (40) locks or releases the ejection rod (41) during simulation and measurement of the simulated lift force in the landing gear ejection protrusion test; one end of the ejection rod (41) is mechanically connected with the buffer strut (42), and the other end is mechanically connected with the loading/releasing mechanism (40); one end of the buffering support column (42) is mechanically connected with the bottom of the hanging basket (1), and the other end of the buffering support column is mechanically connected with the wheel (43).
2. The simulated lift simulation and measurement device according to claim 1, wherein the simulated lift measurement unit (20) comprises a buffer pad (7), wherein the buffer pad (7) is fixedly arranged on a side of the sensor (6) facing the simulated lift simulation unit (30).
3. The simulated lift force simulation and measurement device as claimed in claim 2, wherein the sensor (6) is mounted on a mounting seat provided at the bottom of the basket (1); the sensor (6) is a force measuring sensor, and the buffer pad (7) is a rubber buffer pad; and a balancing weight (13) is arranged in the hanging basket (1).
4. The simulated lift simulation and measurement device according to claim 3, characterised in that it comprises, for each simulated lift simulation unit (30): a piston rod (8), a piston (9) and a simulated lifting cylinder (10),
the artificial lift cylinder (10) is communicated with a gas tank, and the gas tank provides gas into the artificial lift cylinder (10);
the piston (9) is arranged in the imitation lifting cylinder (10) in a sliding manner;
one end of the piston rod (8) is fixedly connected with the piston (9), and the piston (9) vertically slides upwards to drive the other end of the piston rod (8) to be in contact with the simulated lift force measuring unit (20) corresponding to the simulated lift force simulation unit (30).
5. The simulated lift simulation and measurement device according to claim 1, wherein the device comprises four simulated lift simulation units (30) and four simulated lift measurement units (20), the basket (1) is of a cubic structure, and the simulated lift measurement units (20) are respectively arranged at four corner points of the bottom of the basket (1).
6. The artificial lift simulation and measurement device according to claim 1, characterised in that the lifting mechanism (3) comprises a guide frame (31), a loop chain hoist (32) and a hoist chain (33),
the loop chain hoister (32) is fixedly connected with the upper end of the bracket (2);
the guide frame (31) is connected with the chain hoist (32) through a chain, and a chain transmission mechanism of the chain hoist (32) rotates to drive the guide frame (31) to ascend or descend;
the upper end of the sling chain (33) is fixedly connected with the guide frame (31), and the lower end of the sling chain (33) is fixedly connected with the hanging basket (1).
7. A method for simulating lift force simulation and measurement of a landing gear, for carrying out an off-ship protrusion test by using the simulation and measurement device of lift force according to claim 4, the method comprising:
installing an undercarriage (4), and installing the undercarriage (4) at the bottom of the hanging basket (1);
controlling a lifting mechanism (3) to drive a hanging basket (1) to descend, and enabling an undercarriage (4) to descend until a wheel (43) of the undercarriage (4) is contacted with the upper end face of an air pressure bearing and releasing bearing platform (5);
adjusting the gas pressure in the imitation lifting cylinder (10), enabling the piston (9) to slide to further drive the piston rod (8) to move, enabling the upper end face of the piston rod (8) to be in contact with the cushion pad (7), and continuously adjusting the gas pressure in the imitation lifting cylinder (10) until the value of the sensor (6) is the set imitation lifting force value;
controlling a lifting mechanism (3) to drive the hanging basket (1) to continuously descend, so that a buffer strut (42) of the undercarriage (4) is compressed to a specified compression amount;
and controlling an air pressure bearing and releasing mechanism to enable the air pressure bearing and releasing force bearing platform (5) to be far away from the airplane wheel (43), reading the numerical value of the sensor (6) at the moment, and recording the numerical value as a dynamic response value simulating the lift force.
8. A method of simulating lift force simulation and measurement of a landing gear for catapulting protrusion tests using the simulation lift force simulation and measurement device of claim 4, the method comprising:
installing an undercarriage (4), and installing the undercarriage (4) at the bottom of the hanging basket (1) in a suspended manner;
-an ejection lever (41) controlling a loading/release mechanism (40) to lock the undercarriage (4);
adjusting the gas pressure in the imitation lifting cylinder (10), enabling the piston (9) to slide to further drive the piston rod (8) to move, enabling the upper end face of the piston rod (8) to be in contact with the cushion pad (7), and continuously adjusting the gas pressure in the imitation lifting cylinder (10) until the value of the sensor (6) is the set imitation lifting force value;
-controlling a loading/release mechanism (40) to release a ejection lever (41) of the landing gear (4); and reading the value of the sensor (6) at the moment, and recording the value as a dynamic response value simulating the lift force.
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| CN201910643438.4A CN110501146B (en) | 2019-07-16 | 2019-07-16 | Simulation and measurement device and measurement method for simulating lift force |
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| CN201910643438.4A CN110501146B (en) | 2019-07-16 | 2019-07-16 | Simulation and measurement device and measurement method for simulating lift force |
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| CN111929019A (en) * | 2020-07-28 | 2020-11-13 | 中国飞机强度研究所 | Ground test device for simulating landing impact process of carrier-based aircraft undercarriage |
| CN114379817B (en) * | 2021-12-30 | 2023-07-21 | 中国飞机强度研究所 | Device and method for catapulting and protruding test of nose landing gear of carrier-based aircraft |
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| CN116986012B (en) * | 2023-09-25 | 2023-12-15 | 中国飞机强度研究所 | Device and method for landing gear running obstacle crossing impact test of carrier-based aircraft |
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