CN114524109A - Multi-degree-of-freedom testing device - Google Patents
Multi-degree-of-freedom testing device Download PDFInfo
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- CN114524109A CN114524109A CN202210084524.8A CN202210084524A CN114524109A CN 114524109 A CN114524109 A CN 114524109A CN 202210084524 A CN202210084524 A CN 202210084524A CN 114524109 A CN114524109 A CN 114524109A
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- 238000012360 testing method Methods 0.000 title claims abstract description 85
- 238000005096 rolling process Methods 0.000 claims abstract description 124
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- 239000003638 chemical reducing agent Substances 0.000 claims description 30
- 238000000429 assembly Methods 0.000 claims description 22
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- 239000011150 reinforced concrete Substances 0.000 claims description 12
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- 238000004088 simulation Methods 0.000 abstract description 15
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- 230000001174 ascending effect Effects 0.000 abstract 2
- 239000003433 contraceptive agent Substances 0.000 abstract 2
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- 239000002828 fuel tank Substances 0.000 description 9
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The invention relates to a multi-degree-of-freedom testing device, which consists of a two-degree-of-freedom parallel testing test bed and a multi-wheel centering rolling test bed; the multi-wheel centering rolling test bed is arranged on the two-degree-of-freedom parallel test bed and is fixedly connected with the two-degree-of-freedom parallel test bed, and the multi-wheel centering rolling test bed is used for simulating rotation along the direction of a horizontal axis; many rounds of centering roll-over test platform comprises drive ring and rolling element, the drive ring is including fitting with a contraceptive ring and lower ring, the lower ring is fixed to be set up on the parallelly connected test bench of two degrees of freedom, it links together through the pivot with the lower ring to fit with a contraceptive ring, the drive ring is used for the centre gripping rolling element, through increasing many rounds of centering roll-over test platform, realize increasing along the ascending roll of horizontal axis direction on the ascending pivoted basis of horizontal axis direction, utilize the rolling element to simulate aircraft oil tank under the motion state, the improvement acquires the oil tank state under the simulation flight state, provide valuable reference data for the oil tank design.
Description
Technical Field
The invention relates to the technical field of mechanical control, in particular to a multi-degree-of-freedom testing device.
Background
The design of aircraft fuel tanks plays a role during flight which is self-evident, but the prior art is currently lacking in an easy and feasible operating structure that provides data for aircraft fuel tank design and improvement.
In the process of flying, the state of the airplane is diversified, such as various flying states of jolting, left-right shaking, turning and the like, but due to the particularity of the operation of the airplane, the airplane rotating mode is not generated generally, but the flying state is applied to a fighter, so that the test required before the design of the oil tank of the fighter comprises the rotating flying mode.
However, the existing platform for simulating the flight state has a plurality of different flight modes and lacks a simulation test platform under a rotation condition, but the rotary flight in a rapid advancing state is rare, so that the flight state simulation mode is single, and the design of the aircraft fuel tank always has an unpredictable state in actual flight, which affects the progress of the design of the aircraft fuel tank.
Disclosure of Invention
Therefore, the invention provides a multi-degree-of-freedom testing device which can solve the problem that the simulation mode for increasing the flight state is single.
To achieve the above object, the present invention provides a multi-degree-of-freedom test apparatus, comprising: the device consists of a two-degree-of-freedom parallel test bench and a multi-wheel centering rolling test bench;
the two-degree-of-freedom parallel test bed is used for simulating rotation in the horizontal axis direction;
the multi-wheel centering rolling test bed is arranged on the two-degree-of-freedom parallel test bed and is fixedly connected with the two-degree-of-freedom parallel test bed, and the multi-wheel centering rolling test bed is used for simulating rotation along the horizontal axis direction;
the multi-wheel centering rolling test bed consists of a driving ring and rolling bodies, wherein the driving ring comprises an upper ring and a lower ring, the lower ring is fixedly arranged on the two-freedom-degree parallel test bed, the upper ring and the lower ring are connected together through a rotating shaft, the driving ring is used for clamping the rolling bodies, and the rolling bodies are used for simulating an aircraft oil tank;
a first driving piece is arranged on the upper ring and comprises a plurality of upper rollers and a wrench assembly, and the inner edge of the upper ring is provided with a plurality of upper rollers which are in rolling contact with the rolling bodies; the roller is also connected with a wrench assembly, and the wrench assembly is used for driving the upper roller to rotate so as to drive the rolling body;
the lower ring is provided with a second driving piece, the second driving piece comprises a power assembly and a transmission assembly, the power assembly is used for providing power output, the transmission assembly is connected with the power assembly and used for transmitting the power output, and the transmission assembly is in rolling contact with the rolling body and used for realizing the rotation of the rolling body.
Further, the power assembly is a motor speed reducer assembly, the transmission assembly comprises a driving rubber hanging wheel, a main transmission shaft, a driving chain wheel, a driving chain, a first double-row chain wheel, a transmission chain, a tensioning chain wheel, a second double-row chain wheel, a driven chain, a driven shaft and a driven rubber hanging wheel, the driving rubber hanging wheel and the driven rubber hanging wheel are arranged on the inner edge of the lower ring, the motor speed reducer assembly drives the driving rubber hanging wheel to rotate so as to drive the driven rubber hanging wheel, and the driving rubber hanging wheel and the driven rubber hanging wheel are in rolling contact with the rolling body;
still include the backing plate, the backing plate sets up the lower ring is kept away from one side of motor reducer subassembly for under the state that the upper ring is opening, alleviate the upper ring with lower ring contact pressure prevents to go up the hard contact between ring and the lower ring.
Furthermore, a speed sensor is arranged on the rolling body and used for detecting the real-time speed of the rolling body, the control unit is connected with the motor speed reducer assembly, the speed sensor transmits the real-time speed to the control unit, and the control unit adjusts a speed instruction of the motor speed reducer assembly according to the real-time speed so as to maintain the rotating speed of the rolling body when the friction coefficient of the driving rubber hanging wheel and the driven rubber hanging wheel is reduced.
Furthermore, the clamping degree is corrected according to the matching of the real-time speed detected by the speed sensor on the rolling body and the speed output command, if the real-time speed of the rolling body is not consistent with the speed command output by the actual motor reducer assembly, the problem occurring in the power transmission process needs to be corrected, if the real-time speed of the rolling body is Vi, the speed command of the motor reducer assembly is set to be V0, the transmission ratio is k, the Vi and the k × V0 are compared, if Vi is k × V0, the power is normal in the transmission process, if Vi < k × V0, the power is lost in the transmission process, the friction coefficient between the driving rubber-coated wheel and the driven rubber-coated wheel and the rolling body is large, the clamping force for clamping the rolling body is reduced, if Vi > k × V0, the power is increased in the transmission process, the friction coefficient between the driving rubber-coated wheel and the driven rubber-coated wheel and the rolling body is small, the clamping force for clamping the rolling bodies is increased.
Further, when the clamping force for clamping the rolling body needs to be increased or decreased, a first clamping force F1, a second clamping force F2 and a third clamping force F3 are arranged in the central control unit, and F1< F2< F3;
when the clamping force needs to be reduced, judging the clamping force at the current moment, if the current clamping force F is greater than a third clamping force F3, reducing the current clamping force to the third clamping force F3, if the third clamping force F3 is greater than or equal to the current clamping force F and greater than a second clamping force F2, reducing the current clamping force to the second clamping force F2, if the second clamping force F2 is greater than or equal to the current clamping force F and greater than the first clamping force F1, reducing the current clamping force to the first clamping force F1, and if the current clamping force F is less than or equal to the first clamping force F1, not reducing the clamping force;
when the clamping force needs to be improved, the clamping force at the current moment is judged, if the current clamping force F is greater than a third clamping force F3, the clamping force is not improved any more, if the third clamping force F3 is not less than the current clamping force F and greater than a second clamping force F2, the current clamping force is improved to the third clamping force F3, if the second clamping force F2 is not less than the current clamping force F and greater than a first clamping force F1, the current clamping force is improved to the second clamping force F2, and if the current clamping force F is not greater than the first clamping force F1, the current clamping force is improved to the first clamping force F1.
Further, the two-degree-of-freedom parallel test bench comprises: the lower end of the upper platform is connected with a first branched chain through an upper hooke hinge assembly, connected with a second branched chain through a fixed support assembly, and connected with a third branched chain through a hinge support assembly, the lower end of the first branched chain is fixedly connected with an electric cylinder embedded plate, the lower end of the second branched chain is fixedly connected with a fixed support embedded plate, the lower end of the third branched chain is fixedly connected with a hinge embedded plate, the first branched chain drives the upper platform to rotate around the fixed support assembly and simultaneously drives the hinge support assembly to move up and down, and the combined action of the second branched chain and the third branched chain limits the three degrees of freedom of the upper platform in vertical and horizontal movement and rotation around a vertical axis.
Furthermore, the upper hooke hinge assembly comprises two groups of upper hooke hinges, connecting pieces of the two groups of upper hooke hinges are connected with piston rods of the electric cylinder assembly through threads, the tail of the electric cylinder assembly is connected and fastened with the two groups of lower hooke hinges, and the two groups of lower hooke hinges are fastened with the two electric cylinder embedded plates through anchor nut gaskets and anchor bolts.
Furthermore, the fixed support assembly is connected with the upper end face of the fixed support through a screw, and the lower end face of the fixed support is connected and fastened with the fixed support embedded plate through an anchor nut gasket and an anchor bolt.
Further, the hinge support assembly is connected with a set of hinge assemblies through connecting bolts, and the hinge assemblies are fastened with the hinge embedded plates through foundation nut gaskets and foundation bolts.
Further, the electric cylinder embedded plate is fixed with a reinforced concrete foundation through foundation bolts;
the fixed supporting embedded plate is fixed with the reinforced concrete foundation through foundation bolts;
the hinge embedded plate is fixed with the reinforced concrete foundation through foundation bolts.
Compared with the prior art, the invention has the beneficial effects that the two-degree-of-freedom parallel test bed is used for simulating the rotation in the horizontal axis direction by adding the multi-wheel centering rolling test bed, the multi-wheel centering rolling test bed is used for simulating the rotation in the horizontal axis direction, so that the rolling in the horizontal axis direction is increased on the basis of the rotation in the horizontal axis direction, in addition, the driving ring clamps the rolling body, the wrench component drives the upper roller to rotate so as to drive the rolling body, the rolling body is utilized to simulate the aircraft oil tank in a motion state, the simulation state is more real, the data acquisition is convenient, the oil tank state in a simulated flight state is improved, and the valuable reference data is provided for the oil tank design.
Particularly, the backing plate is arranged, so that hard contact between the upper ring and the lower ring is effectively prevented, the upper ring and the lower ring are effectively protected, physical damage to the upper ring or the lower ring in the opening process is prevented, and the service life of the multi-wheel centering rolling test bed is prolonged.
Particularly, by detecting the real-time speed of the rolling body, when the friction coefficient between the driving rubber hanging wheel and the rolling body and the friction coefficient between the driven rubber hanging wheel and the rolling body are normal, the speed instruction output by the motor speed reducer assembly outputs power to the driving rubber hanging wheel through the conveyor belt, so that the loss of the output power of the motor speed reducer assembly in the transmission process is improved, the output power exerts a power effect on the rolling body according to the transmission ratio, and the rotating speed of the rolling body meets the requirements of a simulation experiment.
Particularly, when the state simulation is carried out, the clamping force on the rolling body is adjusted according to the power loss or power increase in the power transmission process, the energy loss of the power in the transmission process is reduced as much as possible, the power is effectively transmitted, the precision of the rolling body in the simulation process is improved, the reference value of the provided simulation parameters is higher, and the application prospect of the multi-degree-of-freedom testing device is improved.
Especially, through carrying out cascaded increase or reduction to the clamping dynamics for the improvement to coefficient of friction is more accurate, makes the power receiving process of rolling element more accurate, realizes the effective control to the rolling element rotational speed, realizes the effective simulation to flight state, improves multi freedom testing arrangement's accuracy nature.
Drawings
FIG. 1 is a schematic structural diagram of a multi-degree-of-freedom testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a two-degree-of-freedom parallel test stand according to an embodiment of the present disclosure;
FIG. 3 is a schematic top view of a multi-wheel centering and rolling test bed according to an embodiment of the present invention;
FIG. 4 is a schematic side view of a multi-wheel centering and rolling test bed according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the multi-degree-of-freedom testing apparatus provided by the embodiment of the present invention is composed of 1 two-degree-of-freedom parallel testing platform 1 and 1 multi-wheel centering rolling testing platform 2;
the two-degree-of-freedom parallel test bed is used for simulating rotation in the horizontal axis direction;
the multi-wheel centering rolling test bed is arranged on the two-degree-of-freedom parallel test bed and is fixedly connected with the two-degree-of-freedom parallel test bed, and the multi-wheel centering rolling test bed is used for simulating rotation along the horizontal axis direction;
the multi-wheel centering rolling test bed consists of 2 driving rings and 1 rolling body, wherein each driving ring comprises an upper ring and a lower ring, the lower rings are fixedly arranged on the two-freedom-degree parallel test bed, the upper rings and the lower rings are connected together through rotating shafts, and the driving rings are used for clamping the rolling bodies;
a first driving piece is arranged on the upper ring and comprises a plurality of upper rollers and a wrench assembly, and the inner edge of the upper ring is provided with a plurality of upper rollers which are in rolling contact with the rolling bodies; the roller is also connected with a wrench assembly, and the wrench assembly is used for driving the upper roller to rotate so as to drive the rolling body;
the lower ring is provided with a second driving part, the second driving part comprises a motor speed reducer component, a driving rubber hanging wheel, a main transmission shaft, a driving chain wheel, a driving chain, a first double-row chain wheel, a transmission chain, a tensioning chain wheel, a second double-row chain wheel, a driven chain wheel, a driven shaft and a driven rubber hanging wheel, the inner edge of the lower ring is provided with the driving rubber hanging wheel and the driven rubber hanging wheel, the motor speed reducer component drives the driving rubber hanging wheel to rotate so as to drive the driven rubber hanging wheel, and the driving rubber hanging wheel and the driven rubber hanging wheel are in rolling contact with the rolling body.
Specifically, by adding the multi-wheel centering rolling test bed, the rolling along the horizontal axis direction is increased on the basis of the rotation in the horizontal axis direction, and the rolling body is utilized to simulate the aircraft fuel tank in a motion state, so that the simulation state is more real, the data acquisition is facilitated, the acquisition of the fuel tank state in the simulated flight state is improved, and the valuable reference is provided for the fuel tank design.
Specifically, still include the backing plate, the backing plate sets up the lower ring is kept away from the one side of motor reducer subassembly for under the state that the upper ring is opened, alleviate the upper ring with lower ring contact pressure prevents the hard contact between upper ring and the lower ring.
Specifically, the embodiment of the invention effectively prevents the hard contact between the upper ring and the lower ring by arranging the base plate, realizes effective protection of the upper ring and the lower ring, prevents the upper ring or the lower ring from being physically damaged in the opening process, and prolongs the service life of the multi-wheel centering rolling test bed.
Specifically, a speed sensor is arranged on the rolling body and used for detecting the real-time speed of the rolling body, the control unit is connected with the motor speed reducer assembly, the speed sensor transmits the real-time speed to the control unit, and the control unit adjusts a speed instruction of the motor speed reducer assembly according to the real-time speed so as to maintain the rotating speed of the rolling body when the friction coefficient of the driving rubber hanging wheel and the driven rubber hanging wheel is reduced.
Specifically, by detecting the real-time speed of the rolling body, when the friction coefficient between the rolling body and the driving rubber hanging wheel and the driven rubber hanging wheel is normal, the speed instruction output by the motor speed reducer assembly outputs power to the driving rubber hanging wheel through the conveyor belt, so that the loss of the output power of the motor speed reducer assembly in the transmission process is improved, the output power exerts a power effect on the rolling body according to the transmission ratio, and the rotating speed of the rolling body meets the requirement of a simulation experiment.
Specifically, in the actual use process, if the real-time speed detected by the speed sensor on the rolling element does not match the speed command output by the actual motor reducer assembly, it is necessary to correct the problem occurring during the power transmission, and if the real-time speed of the rolling elements is Vi, the speed command of the motor reducer unit is set to V0, the gear ratio is k, Vi and k × V0 are compared, and if Vi is k × V0, it means that the power is normal in the transmission process, if Vi < k × V0, it means that the power is lost in the transmission process, the friction coefficient between the driving rubber-coated wheel and the driven rubber-coated wheel and the rolling body is large, if the clamping force for clamping the rolling body is reduced and Vi is larger than kxV 0, the power is increased in the transmission process, the friction coefficient between the driving rubber-coated wheel and the rolling body and the friction coefficient between the driven rubber-coated wheel and the rolling body are small, and the clamping force for clamping the rolling body is improved.
Particularly, in the actual use process, when the state simulation is carried out, according to the power loss or power increase in the power transmission process, the clamping force on the rolling element is adjusted, the energy loss of the power in the transmission process is reduced as much as possible, the effective transmission of the power is realized, the accuracy of the rolling element in the simulation is improved, the reference value of the provided simulation parameters is higher, and the application prospect of the multi-degree-of-freedom testing device is improved.
Specifically, when the clamping force for clamping the rolling element needs to be increased or decreased, a first clamping force F1, a second clamping force F2 and a third clamping force F3 are arranged in the central control unit, and F1< F2< F3;
when the clamping force needs to be reduced, judging the clamping force at the current moment, if the current clamping force F is greater than a third clamping force F3, reducing the current clamping force to the third clamping force F3, if the third clamping force F3 is greater than or equal to the current clamping force F and greater than a second clamping force F2, reducing the current clamping force to the second clamping force F2, if the second clamping force F2 is greater than or equal to the current clamping force F and greater than the first clamping force F1, reducing the current clamping force to the first clamping force F1, and if the current clamping force F is less than or equal to the first clamping force F1, not reducing the clamping force;
when the clamping force needs to be improved, the clamping force at the current moment is judged, if the current clamping force F is greater than a third clamping force F3, the clamping force is not improved any more, if the third clamping force F3 is not less than the current clamping force F and greater than a second clamping force F2, the current clamping force is improved to the third clamping force F3, if the second clamping force F2 is not less than the current clamping force F and greater than a first clamping force F1, the current clamping force is improved to the second clamping force F2, and if the current clamping force F is not greater than the first clamping force F1, the current clamping force is improved to the first clamping force F1.
Specifically, the clamping force is increased or decreased in a stepwise manner, so that the friction coefficient is improved more accurately, the power receiving process of the rolling element is more accurate, the rotating speed of the rolling element is effectively controlled, the flight state is effectively simulated, and the accuracy of the multi-degree-of-freedom testing device is improved.
Specifically, the two-degree-of-freedom parallel test bench comprises: the lower end of the upper platform is connected with a first branched chain through an upper hooke hinge assembly, connected with a second branched chain through a fixed support assembly, and connected with a third branched chain through a hinge support assembly, the lower end of the first branched chain is fixedly connected with an electric cylinder embedded plate, the lower end of the second branched chain is fixedly connected with a fixed support embedded plate, the lower end of the third branched chain is fixedly connected with a hinge embedded plate, the first branched chain drives the upper platform to rotate around the fixed support assembly and simultaneously drives the hinge support assembly to move up and down, and the combined action of the second branched chain and the third branched chain limits the three degrees of freedom of the upper platform in vertical and horizontal movement and rotation around a vertical axis.
Specifically, the upper hooke hinge assembly comprises two groups of upper hooke hinges, connecting pieces of the two groups of upper hooke hinges are connected with piston rods of the electric cylinder assembly through threads, the tail of the electric cylinder assembly is connected and fastened with two groups of lower hooke hinges, and the two groups of lower hooke hinges are fastened with two electric cylinder embedded plates through anchor nut gaskets and anchor bolts.
Specifically, the fixed support assembly is connected with the upper end face of the fixed support through a screw, and the lower end face of the fixed support is connected and fastened with the fixed support embedded plate through an anchor nut gasket and an anchor bolt.
Specifically, the hinge bracket assembly is connected with a set of hinge assemblies through connecting bolts, and the hinge assemblies are fastened with the hinge embedded plate through foundation nut gaskets and foundation bolts.
Specifically, the electric cylinder embedded plate is fixed with the reinforced concrete foundation through the foundation bolt.
Specifically, the fixed support embedded plate is fixed with the reinforced concrete foundation through foundation bolts.
Specifically, the hinge embedded plate is fixed with the reinforced concrete foundation through the foundation bolt.
Specifically, as shown in fig. 1-4, the embodiment of the invention is composed of 1 two-degree-of-freedom parallel test bench 1 and 1 multi-wheel centering rolling test bench 2. The two-degree-of-freedom parallel test bench 1 comprises 1 upper platform 3, 2 groups of upper hooke hinges 4, 1 group of fixed support assemblies 5, 1 group of hinge support assemblies 6, 1 group of hinge assemblies 7, 1 fixed support 8, 2 groups of electric cylinder assemblies 9, 2 groups of lower hooke hinges 10, 1 group of foundation nut gaskets 11, a group of foundation bolts 12, 1 hinge embedded plate 13, 1 fixed support embedded plate 14 and 2 electric cylinder embedded plates 15.
The upper platform 3 is connected with 2 groups of upper hooke hinges 4, 1 group of fixed support assemblies 5, 1 group of hinge support assemblies 6 and 1 group of hinge assemblies 7 through connecting bolts, the connecting pieces of the 2 groups of upper hooke hinges 4 are connected with the piston rods of the electric cylinder assemblies 9 through threads, the tail parts of the electric cylinder assemblies 9 are connected and fastened with 2 groups of lower hooke hinges 10, and the 2 groups of lower hooke hinges 10 are fastened with 2 electric cylinder embedded plates 15 through anchor nut gaskets 11 and anchor bolts 12.
The group 1 hinge support assembly 6 is connected with the group 1 hinge assembly 7 through connecting bolts, and the group 1 hinge assembly 7 is fastened with the group 1 hinge embedded plate 13 through an anchor nut gasket 11 and an anchor bolt 12.
The group 1 of fixed support assemblies 5 are connected with the upper end face of a fixed support 8 through screws, and the lower end face of the fixed support 8 is connected and fastened with 1 fixed support embedded plate 14 through an anchor nut gasket 11 and an anchor bolt 12.
All the embedded plates are fixedly connected with the reinforced concrete foundation through foundation bolts, so that the embodiment of the invention is assembled, and the reinforced concrete foundation ensures the strength of the embodiment of the invention.
The rotation of the alternating current motor is controlled through software, the piston rods of the 2 groups of electric cylinder assemblies 9 can stretch, and the piston rods stretch to drive the upper platform 3 to rotate around the fixed support assembly 5. And simultaneously bring the hinge bracket assembly 6 into up-and-down motion. The hinge support assembly 6 drives the hinge assembly 7 to move up and down.
The hinge assembly 7 in combination with the fixed support 8 restricts the three degrees of freedom of the upper platform 3 in vertical, horizontal movement and rotation about a vertical axis, thus allowing movement in the remaining two degrees of freedom.
The two-degree-of-freedom parallel test bed 1 can not only simulate road spectrums, sea wave spectrums and the like of vehicles, airplanes and ships, but also test equipment or systems for acquiring data in a motion state through rotation in two axis directions.
Wherein the multi-wheel centering rolling test bed 2 consists of 2 driving rings 16 and 1 rolling body 17.
The driving ring 16 is composed of 3 sets of wrench assemblies 18, 3 sets of upper rollers 19, 1 set of upper rings 20, 1 set of locking bolts 21, 1 set of motor speed reducer assemblies 22, 1 piece of rotating shaft 23, 1 set of lower rings 24, 1 piece of driving rubber hanging wheel 25, 1 piece of main transmission shaft 26, 1 piece of driving sprocket 27, 1 set of driving chain 28, 1 piece of double-row sprocket 129, 1 set of transmission chain 30, 1 piece of tensioning sprocket 31, 1 set of double-row sprocket 232, 1 set of driven chain 33, 1 piece of driven sprocket 34, 1 piece of driven shaft 35, 1 piece of driven rubber hanging wheel 36, 1 piece of locking shaft 37, and 1 piece of backing plate 38.
The 3 sets of wrench assemblies 18, the 3 upper rollers 19, and the 1 upper ring 20 constitute the drive upper ring portion of the drive ring 16.
The driving lower ring part consists of 1 set of motor speed reducer component 22, 1 lower ring 24, 1 driving rubber hanging wheel 25, 1 main transmission shaft 26, 1 driving chain wheel 27, 1 set of driving chain 28, 1 double-row chain wheel 129, 1 set of transmission chain 30, 1 tensioning chain wheel 31, 1 set of double-row chain wheel 232, 1 set of driven chain 33, 1 driven chain wheel 34, 1 driven shaft 35, 1 driven rubber hanging wheel 36 and 1 backing plate 38.
The upper driving ring and the lower driving ring are connected together through 1 rotating shaft 23, the upper driving ring can rotate around the rotating shaft 23, when the rolling bodies 17 are placed, the upper driving ring rotates around the rotating shaft 23 and is locked by the locking shaft 37, and therefore the assembly of the whole machine is completed.
The lower ring 24 is a foundation of the whole embodiment of the invention, and bolt hole sites are designed on the part, and the hole sites can be used for being connected and fastened with the reinforced concrete foundation through bolt components and also fixedly connected with a large-scale platform through the bolt components, so that the strength of the whole embodiment of the invention is ensured.
The assembly sequence of the whole embodiment of the invention is that the locking shaft 37 is loosened, the driving upper ring is opened, the rolling bodies 17 are hung on the two groups of driving lower rings, then the driving upper ring is closed, the locking shaft 37 is locked, the positions of the 3 groups of wrench assemblies 18 are adjusted, the wrench assemblies 18 push the upper rollers 19 to apply force to the rolling bodies until the rolling bodies 17 are firmly clamped by the 3 upper rollers 19, the driving rubber hanging wheel 25 and the driven rubber hanging wheel 26.
The motion principle of driving the lower ring in the embodiment of the invention is that software is utilized to control the motor speed reducer component 22, the motor speed reducer component 22 is connected with the main transmission shaft 26, and the driving rubber hanging wheel 25 and the driving chain wheel 27 are also connected with the main transmission shaft 26, so that when the motor speed reducer component 22 rotates, the main transmission shaft 26, the driving rubber hanging wheel 25 and the driving chain wheel 27 are driven; the driving sprocket 27 drives the driving chain 28, the driving chain 28 drives the duplex sprocket 129 to rotate, when the duplex sprocket 129 rotates, the driving chain 30 drives the duplex sprocket 232 to rotate, so that the driven chain 33 drives the driven sprocket 34 to rotate, and the driven shaft 35 is driven to drive the driven rubber hanging wheel 36 to rotate together with the driving rubber hanging wheel 25.
The rolling body 17 is driven to rotate by the friction force of the driving rubber hanging wheel 25, the driven rubber hanging wheel 36 and the 3-piece upper roller 19, so that the rolling body 17 is rotated.
The multi-wheel centering rolling test bed 2 can realize the continuous rotation of the rolling body, and the successful design point is that the friction force of the rubber hanging wheel is ingeniously utilized to drive the rolling body to rotate, and the rubber hanging wheel is not mechanically connected with the rolling body. The test device can test the performance change of oil contained in the rolling body at different speeds.
The two-freedom-degree parallel test bed 1 and the multi-wheel centering rolling test bed 2 are organically combined, so that the movement with 3 degrees of freedom can be realized, the function of the test bed is to simulate the state of an oil tank of an airplane in different postures of the airplane when the oil tank of the airplane flies in the air under different operation environments, different operation postures and different operation speeds, and real-time data of the oil tank in different states can be obtained. Provide valuable data for the design and improvement of aircraft fuel tanks, accelerate the efficiency and progress of the initial design of aircraft fuel tanks, and provide flight data for the flight of aircraft.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A multi-degree-of-freedom testing device is characterized by comprising: the device consists of a two-degree-of-freedom parallel test bench and a multi-wheel centering rolling test bench;
the two-degree-of-freedom parallel test bed is used for simulating rotation in the horizontal axis direction;
the multi-wheel centering rolling test bed is arranged on the two-degree-of-freedom parallel test bed and is fixedly connected with the two-degree-of-freedom parallel test bed, and the multi-wheel centering rolling test bed is used for simulating rotation along the horizontal axis direction;
the multi-wheel centering roll test bed consists of a driving ring and rolling bodies, wherein the driving ring comprises an upper ring and a lower ring, the lower ring is fixedly arranged on the two-degree-of-freedom parallel test bed, the upper ring and the lower ring are connected together through a rotating shaft, the driving ring is used for clamping the rolling bodies, and the rolling bodies are used for simulating an aircraft oil tank;
a first driving piece is arranged on the upper ring and comprises a plurality of upper rollers and a wrench assembly, the inner edge of the upper ring is provided with a plurality of upper rollers, the upper rollers are in rolling contact with the rolling bodies, the rollers are also connected with the wrench assembly, and the wrench assembly is used for driving the upper rollers to rotate so as to drive the rolling bodies;
the lower ring is provided with a second driving part, the second driving part comprises a power assembly and a transmission assembly, the power assembly is used for providing power output, the transmission assembly is connected with the power assembly and used for transmitting the power output, and the transmission assembly is in rolling contact with the rolling body and used for realizing the rotation of the rolling body.
2. The multiple degree of freedom testing device of claim 1,
the power assembly is a motor speed reducer assembly, the transmission assembly comprises a driving rubber hanging wheel, a main transmission shaft, a driving chain wheel, a driving chain, a first double-row chain wheel, a transmission chain, a tensioning chain wheel, a second double-row chain wheel, a driven chain wheel, a driven shaft and a driven rubber hanging wheel, the driving rubber hanging wheel and the driven rubber hanging wheel are arranged on the inner edge of the lower ring, the motor speed reducer assembly drives the driving rubber hanging wheel to rotate so as to drive the driven rubber hanging wheel, and the driving rubber hanging wheel and the driven rubber hanging wheel are in rolling contact with the rolling body;
still include the backing plate, the backing plate sets up the lower ring is kept away from one side of motor reducer subassembly for under the state that the upper ring is opening, alleviate the upper ring with lower ring contact pressure prevents to go up the hard contact between ring and the lower ring.
3. The multiple degree of freedom testing device of claim 2,
the rolling element is provided with a speed sensor for detecting the real-time speed of the rolling element, the control unit is connected with the motor speed reducer assembly, the speed sensor transmits the real-time speed to the control unit, and the control unit adjusts the speed instruction of the motor speed reducer assembly according to the real-time speed so as to maintain the rotating speed of the rolling element when the friction coefficient of the driving rubber hanging wheel and the driven rubber hanging wheel is reduced.
4. The multiple degree of freedom testing device of claim 3,
according to the matching of the real-time speed detected by the speed sensors on the rolling bodies and the speed output command, correcting the clamping degree, if the clamping degree does not accord with the speed command output by the actual motor reducer component, it is necessary to correct the problem occurring during the power transmission, and if the real-time speed of the rolling elements is Vi, the speed command of the motor reducer unit is set to V0, the gear ratio is k, Vi and k × V0 are compared, and if Vi is k × V0, it means that the power is normal in the transmission process, if Vi < k × V0, it means that the power is lost in the transmission process, the friction coefficient between the driving rubber-coated wheel and the driven rubber-coated wheel and the rolling body is large, if the clamping force for clamping the rolling body is reduced and Vi is larger than kxV 0, the power is increased in the transmission process, the friction coefficient between the driving rubber-coated wheel and the rolling body and the friction coefficient between the driven rubber-coated wheel and the rolling body are small, and the clamping force for clamping the rolling body is improved.
5. The multiple degree of freedom testing device of claim 4,
when the clamping force for clamping the rolling body needs to be increased or decreased, a first clamping force F1, a second clamping force F2 and a third clamping force F3 are arranged in the central control unit, and F1 is more than F2 and more than F3;
when the clamping force needs to be reduced, judging the clamping force at the current moment, if the current clamping force F is greater than a third clamping force F3, reducing the current clamping force to the third clamping force F3, if the third clamping force F3 is greater than or equal to the current clamping force F and greater than a second clamping force F2, reducing the current clamping force to the second clamping force F2, if the second clamping force F2 is greater than or equal to the current clamping force F and greater than the first clamping force F1, reducing the current clamping force to the first clamping force F1, and if the current clamping force F is less than or equal to the first clamping force F1, not reducing the clamping force;
when the clamping force needs to be improved, the clamping force at the current moment is judged, if the current clamping force F is greater than a third clamping force F3, the clamping force is not improved any more, if the third clamping force F3 is not less than the current clamping force F and greater than a second clamping force F2, the current clamping force is improved to the third clamping force F3, if the second clamping force F2 is not less than the current clamping force F and greater than a first clamping force F1, the current clamping force is improved to the second clamping force F2, and if the current clamping force F is not greater than the first clamping force F1, the current clamping force is improved to the first clamping force F1.
6. The multiple degree of freedom testing device of claim 5,
the two-degree-of-freedom parallel test bench comprises: the lower end of the upper platform is connected with a first branched chain through an upper hooke hinge assembly, connected with a second branched chain through a fixed support assembly, and connected with a third branched chain through a hinge support assembly, the lower end of the first branched chain is fixedly connected with an electric cylinder embedded plate, the lower end of the second branched chain is fixedly connected with a fixed support embedded plate, the lower end of the third branched chain is fixedly connected with a hinge embedded plate, the first branched chain drives the upper platform to rotate around the fixed support assembly and simultaneously drives the hinge support assembly to move up and down, and the combined action of the second branched chain and the third branched chain limits the three degrees of freedom of the upper platform in vertical and horizontal movement and rotation around a vertical axis.
7. The multiple degree of freedom testing device of claim 6,
the upper hooke hinge assembly comprises two groups of upper hooke hinges, connecting pieces of the two groups of upper hooke hinges are connected with piston rods of the electric cylinder assembly through threads, the tail of the electric cylinder assembly is connected and fastened with the two groups of lower hooke hinges, and the two groups of lower hooke hinges are fastened with the two electric cylinder embedded plates through anchor nut gaskets and anchor bolts.
8. The multiple degree of freedom testing device of claim 7,
the fixed support assembly is connected with the upper end face of the fixed support through a screw, and the lower end face of the fixed support is connected and fastened with the fixed support embedded plate through an anchor nut gasket and an anchor bolt.
9. The multiple degree of freedom testing apparatus of claim 8, wherein the hinge bracket assembly is coupled to a set of hinge assemblies by coupling bolts, the hinge assemblies being fastened to the hinge embedment plate by anchor nut shims and anchor bolts.
10. The multiple degrees of freedom testing device according to claim 9, wherein the electric cylinder embedded plate is fixed with a reinforced concrete foundation through foundation bolts;
the fixed supporting embedded plate is fixed with the reinforced concrete foundation through foundation bolts;
the hinge embedded plate is fixed with the reinforced concrete foundation through foundation bolts.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021107690879 | 2021-07-07 | ||
| CN202110769087.9A CN113650804A (en) | 2021-07-07 | 2021-07-07 | Multi-degree-of-freedom testing device |
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| CN114524109A true CN114524109A (en) | 2022-05-24 |
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| CN202110769087.9A Withdrawn CN113650804A (en) | 2021-07-07 | 2021-07-07 | Multi-degree-of-freedom testing device |
| CN202210084524.8A Pending CN114524109A (en) | 2021-07-07 | 2022-01-25 | Multi-degree-of-freedom testing device |
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| CN116605416B (en) * | 2023-07-17 | 2023-10-24 | 四川腾盾科技有限公司 | Automatic inclinator calibration equipment and calibration method |
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| CN208333835U (en) * | 2018-06-21 | 2019-01-04 | 力姆泰克（廊坊）传动设备有限公司 | A kind of two degrees of freedom series connection is test bed |
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| CN110873647A (en) * | 2019-12-20 | 2020-03-10 | 西北工业大学 | Rolling and pitching attitude test bed for micro engine |
| CN113044239A (en) * | 2019-12-26 | 2021-06-29 | 中国航空工业集团公司西安飞机设计研究所 | Supporting structure of two-degree-of-freedom test bed |
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| CN206619395U (en) * | 2017-03-27 | 2017-11-07 | 力姆泰克（北京）传动设备股份有限公司 | A kind of high accuracy positioning multi-function test stand |
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