CN107845307A - A kind of flight simulation system and its buffeting platform - Google Patents
A kind of flight simulation system and its buffeting platform Download PDFInfo
- Publication number
- CN107845307A CN107845307A CN201711222800.8A CN201711222800A CN107845307A CN 107845307 A CN107845307 A CN 107845307A CN 201711222800 A CN201711222800 A CN 201711222800A CN 107845307 A CN107845307 A CN 107845307A
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- 238000004088 simulation Methods 0.000 title claims abstract description 40
- 210000004907 gland Anatomy 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 description 6
- 235000021170 buffet Nutrition 0.000 description 5
- 238000013016 damping Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
- G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
- G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention provides a kind of flight simulation system and its platform is buffeted, the vibrating mechanism of the buffeting platform includes motor, the eccentric wheel with the output shaft drive connection of the motor, and the drive link group with the eccentric wheel Joint；The drive link group includes guide rod and vibrating arm, and the top of the vibrating arm is resisted against the upper mounting plate；The amplitude adjustment mechanism includes telescoping cylinder, the sliding block affixed with the cylinder rod of the telescoping cylinder, and the guide rail being opened on the lower platform；The sliding block and the guide rod slidable connection, the vibrating arm are fixedly connected with the sliding block.So, the buffeting platform adjusts vibration frequency by motor speed, and the force application location of vibrating arm is adjusted by the flexible amplitude of telescoping cylinder simultaneously, by the size adjusting amplitude for adjusting torque, it is achieved thereby that the synchronous adjustment of shake amplitude and frequency, and then simulation context is expanded, improve simulation performance.
Description
Technical field
The present invention relates to aircraft simulation technical field, and in particular to a kind of buffeting platform for flight simulation system.
The invention further relates to a kind of flight simulation system for including the buffeting platform.
Background technology
Flight simulation system is state of flight, flight environment of vehicle and the flying condition for imitating airborne vehicle, and provided to driver
Vision, the sense of hearing, tactile and the state simulation of kinaesthesis device.Buffet the important composition that platform is helicopter flight simulation system
Part, its can helicopter simulating propeller at a high speed rotate when with air-flow interaction and caused high dither, make to go straight up to
Machine flight simulation system more presses close to the truth of the helicopter to be simulated shake, so as to improve the emulation energy of simulation system
Power.
Fig. 1-Fig. 3 is refer to, Fig. 1 is the structural representation for buffeting platform in the prior art；Fig. 2 is to buffet to put down shown in Fig. 1
The structural representation of electric machine assembly in platform；Fig. 3 is the side view of electric machine assembly in Fig. 2.
In the prior art, the form for buffeting platform generally use vibrating motor for flight simulation system.Buffet flat
Platform includes being arranged at the support of bottom, the table top above support and the vibration below table top is supported in by damping
Motor；Wherein, table top is driven by vibrating motor carries out up-down vibration, and damping can be rubber spring, complex spring, inflation
Spring etc..In the course of the work, the rotary shaft of motor drives eccentric block to be rotated, and eccentric block produces edge during rotation
Eccentric block center of gravity to rotating shaft center centrifugal force, so as to promote the table top of connection fixed thereto to move up and down.According to centrifugal force
Equation：F=mv2/r, wherein f are centrifugal force, and m is the quality of eccentric block, and v is the linear velocity of eccentric block center of gravity, and r is eccentric block weight
The radius of the heart.It can be seen that the more fast then centrifugal force of speed of motor rotation is bigger, the amplitude of platform is bigger.
But existing buffeting platform, it is merely able to adjust the frequency of vibration by adjusting the rotating speed of motor, but can not
Adjusting amplitude, frequency and amplitude are a constant relations, so as to can only helicopter simulating in the vibrating effect in a certain stage, shake
The simulation performance that dynamic model is intended is poor.Therefore it provides a kind of new buffeting platform, to which shake amplitude and frequency can be adjusted in synchronism
Rate, so as to expand simulation context, simulation performance is improved, just turns into those skilled in the art's urgent problem to be solved.
The content of the invention
It is an object of the invention to provide a kind of new buffeting platform, shakes amplitude and frequency to be adjusted in synchronism,
So as to expand simulation context, simulation performance is improved.It is a further object of the present invention to provide a kind of flight based on the buffeting platform
Simulation system.
In order to solve the above-mentioned technical problem, the present invention provides a kind of buffeting platform for flight simulation system, including branch
Support the upper mounting plate of cockpit, support by leg assembly the lower platform of the upper mounting plate, and the vibration being installed between two platforms
Mechanism and amplitude adjustment mechanism；
The vibrating mechanism includes motor, the eccentric wheel being connected with the output shaft of the motor, and with the bias
Take turns the drive link group of Joint；The drive link group includes guide rod and vibrating arm, and the top of the vibrating arm is resisted against described
Upper mounting plate；
The amplitude adjustment mechanism includes telescoping cylinder, the sliding block affixed with the cylinder rod of the telescoping cylinder, and is opened in described
Guide rail on lower platform；The sliding block and the guide rod slidable connection, the vibrating arm are fixedly connected with the sliding block.
Further, the leg assembly includes supporting leg body and spring buffer structure, the spring buffer structure setting
Between the supporting leg body and the upper mounting plate.
Further, the spring buffer structure includes the spring firm banking affixed with the supporting leg body, is installed on
The guiding support bar of the spring firm banking, the spring of the guiding support bar is sheathed on, and is fixed in the support bar
The gland at top.
Further, the upper mounting plate and lower platform are rectangular platform, and the leg assembly is four groups, each supporting leg
Component is divided into the corner of the rectangular platform.
Further, the upper mounting plate and/or the lower platform are tower structure.
Further, support beam, the vibrating mechanism and amplitude adjustment are installed on the axis of the lower platform
Mechanism is mounted in the support beam.
Further, the motor is servomotor.
The present invention also provides a kind of flight simulation system, including buffeting platform as described above.
Buffeting platform provided by the present invention is used for flight simulation system, and the buffeting platform includes the upper flat of support cockpit
Platform, the lower platform for supporting by leg assembly the upper mounting plate, and the vibrating mechanism and amplitude being installed between two platforms are adjusted
Complete machine structure；Wherein, the vibrating mechanism includes motor, the eccentric wheel being connected with the output shaft of the motor, and with it is described
The drive link group of eccentric wheel Joint；The drive link group includes guide rod and vibrating arm, and the top of the vibrating arm is resisted against
The upper mounting plate；The amplitude adjustment mechanism includes telescoping cylinder, the sliding block affixed with the cylinder rod of the telescoping cylinder, and is opened in institute
State the guide rail on lower platform；The sliding block and the guide rod slidable connection, the vibrating arm are fixedly connected with the sliding block.
In the course of the work, the output of motor rotates passes to eccentric wheel by structures such as spring bearing and synchronous pulleys,
Eccentric wheel concomitant rotation and produce the linear displacement of above-below direction, then by drive link group by vibrate through upper mounting plate pass to top
Cockpit, so as to realize vibration simulation.When needing to adjust Oscillation Amplitude, the stretching stroke of telescoping cylinder is adjusted, so as to movable slider
Slided on guide rail and guide rod, you can adjustment vibrating arm is relative to the position of upper mounting plate, and vibrating arm supporting point position difference is then
It passes to that the amplitude of upper mounting plate is also different, so as to realize the amplitude regulation for buffeting platform.Host computer passes through controller, driver
Drive system is controlled, platform frequency size is buffeted in drive system control, and motor speed is bigger, and vibration frequency is higher, amplitude regulation system
The vibration amplitude size of platform is buffeted in system control, and the amplitude of the bigger vibration of overhang of telescoping cylinder is bigger.So, the buffeting platform
Vibration frequency is adjusted by motor speed, and the force application location of vibrating arm is adjusted by the flexible amplitude of telescoping cylinder simultaneously, is passed through
The size adjusting amplitude of torque is adjusted, it is achieved thereby that the synchronous adjustment of shake amplitude and frequency, and then simulation context is expanded,
Improve simulation performance.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation for buffeting platform in the prior art；
Fig. 2 is the structural representation that electric machine assembly in platform is buffeted shown in Fig. 1；
Fig. 3 is the side view of electric machine assembly in Fig. 2；
Fig. 4 is buffeting a kind of structural representation of embodiment of platform provided by the present invention；
Fig. 5 is that the structural representation for removing upper mounting plate part in platform is buffeted shown in Fig. 4；
Fig. 6 is the partial enlarged drawing that platform is buffeted shown in Fig. 5；
Fig. 7 is the structural representation that spring buffer structure in platform is buffeted shown in Fig. 4；
Fig. 8 and Fig. 9 is the analogous diagram that platform is buffeted shown in Fig. 4.
Description of reference numerals：
In Fig. 1-Fig. 3：
101- vibrating motors
102- supports
103- table tops
104- dampings
105- eccentric blocks
In Fig. 4-Fig. 9：
1- upper mounting plates
2- leg assemblies
21- supporting leg body 22- spring buffer structures
221- spring firm banking 222- guiding support bar 223- spring 224- glands
3- lower platforms
41- motor 42- eccentric wheel 43- guide rod 44- vibrating arms
51- telescoping cylinder 52- sliding block 53- guide rail 54- supporting plates
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 4-Fig. 7 is refer to, Fig. 4 is buffeting a kind of structural representation of embodiment of platform provided by the present invention
Figure；Fig. 5 is that the structural representation for removing upper mounting plate part in platform is buffeted shown in Fig. 4；Fig. 6 is the office that platform is buffeted shown in Fig. 5
Portion's enlarged drawing；Fig. 7 is the structural representation that spring buffer structure in platform is buffeted shown in Fig. 4.
In a kind of embodiment, buffeting platform provided by the present invention is used for flight simulation system, and the buffeting is put down
Platform includes the upper mounting plate 1 of support cockpit, supports by leg assembly 2 lower platform 3 of the upper mounting plate 1, and to be installed on two flat
Vibrating mechanism and amplitude adjustment mechanism between platform；Wherein, the vibrating mechanism includes motor 41, the output with the motor 41
The eccentric wheel 42 of axle drive connection, and the drive link group with the Joint of eccentric wheel 42；The drive link group includes guide rod
43 and vibrating arm 44, the top of the vibrating arm 44 be resisted against the upper mounting plate 1；The amplitude adjustment mechanism includes telescoping cylinder
51st, the sliding block 52 affixed with the cylinder rod of the telescoping cylinder 51, and the guide rail 53 being opened in the supporting plate 54 of the lower platform 3；
The sliding block 52 and the slidable connection of guide rod 43, the vibrating arm 44 are fixedly connected with the sliding block 52；The sliding block
52 can slide on guide rail 53.The motor 41 is specially servomotor 41.
Above-mentioned upper mounting plate 1 and/or lower platform 3 can be tower structure or plank frame, because tower structure is easy to
Save material, it is preferred to use tower structure.When lower platform 3 is tower structure, support beam is installed on its axis, institute
State vibrating mechanism and the amplitude adjustment mechanism is mounted in the support beam, in order to arrangement of mechanism.
In the course of the work, the output of motor 41 rotates passes to eccentric wheel by structures such as spring bearing and synchronous pulleys
42, the concomitant rotation of eccentric wheel 42 and produce the linear displacement of above-below direction, then will be vibrated by drive link group and transmitted through upper mounting plate 1
Top cockpit is given, so as to realize vibration simulation.When needing to adjust Oscillation Amplitude, the stretching stroke of telescoping cylinder 51 is adjusted, so as to
Band movable slider 52 slides on guide rail and guide rod 43, you can adjustment vibrating arm 44 is relative to the position of upper mounting plate 1, vibrating arm 44
Supporting point position difference then its pass to that the amplitude of upper mounting plate 1 is also different, so as to realize the amplitude regulation for buffeting platform.Host computer
By controller, driver control drive system, platform frequency size, the bigger vibration of the rotating speed of motor 41 are buffeted in drive system control
Frequency is higher, and the vibration amplitude size of platform, the width of the bigger vibration of overhang of telescoping cylinder 51 are buffeted in the control of amplitude regulating system
Value is bigger.So, the buffeting platform is by the adjustment of rotational speed vibration frequency of motor 41, and passes through the flexible amplitude of telescoping cylinder 51 simultaneously
The force application location of vibrating arm 44 is adjusted, by adjusting the size adjusting amplitude of torque, it is achieved thereby that shake amplitude and frequency
It is adjusted in synchronism, and then expands simulation context, improves simulation performance.
In order to improve connection reliability and stability with top cockpit, ensure platform ability, the above-mentioned He of upper mounting plate 1
Lower platform 3 can be rectangular platform, and now leg assembly 2 is four groups, and each leg assembly 2 is divided into the rectangular platform
Corner, with provide preferably support, ensure stability.It is apparent that leg assembly 2 can also set six groups or more groups.Branch
Leg assembly 2 be distributed in buffet platform corner, undertake the load of whole platform, respectively with upper mounting plate 1 and the supporter of lower platform 3
It is fixed.
The leg assembly 2 includes supporting leg body 21 and spring buffer structure 22, and the spring buffer structure 22 is arranged at
Between the supporting leg body 21 and the upper mounting plate 1, jolted by setting spring buffer structure 22 to reduce, and pass through supporting leg body
21 provide support force, ensure stability of strutting system.
Above-mentioned spring buffer structure 22 includes the spring firm banking 221 affixed with the supporting leg body 21, is installed on institute
State the guiding support bar 222 of spring firm banking 221, be sheathed on the spring 223 of the guiding support bar 222, and be fixed in
The gland 224 of the support bar top.In whole platform motion process, spring buffer structure 22 is primarily subjected to vertical direction pressure
Power and the side force with angle, therefore consider the self character of spring 223, spring firm banking 221 and guiding support bar 222 can divide
Load band angle side force, makes spring 223 bear positive pressure, and extreme position is carried out so as to increase spring 223 on security standpoint
Security protection；Also, the load of whole platform directly connects with spring buffer structure 22, and the weight of load is also all delayed by spring
Rush structure 22 to undertake, so as to reduce the demand to the power of motor 41.
Below with the full SERVO CONTROL of motor 41, bearing capacity 1100kg, maximum frequency of oscillation 22Hz, crest amplitude 6mm, flat
Platform height 369mm, stage body weight 400kg buffeting platform exemplified by, carry out platform kinematics simulation analysis.
Single spring, four spring buffer structure distribution surroundings below cockpit, the preliminary seat of honour are designed according to platform bearer
Cabin weight is 1100 ± 50kg, and according to uniformly designing, single spring performance is as follows：Service load is：1100 × 9.8 ÷ 4=
2695N；Platform overall permanence is buffeted according to level type, the motional amplitude of platform is ± 5mm.It is straight by the way that spring steel wire is calculated
Footpath 14mm, effective number of coils 5 are enclosed.And check is designed according to related software.According to parameter requirements, use
Inventor2012 carries out level type and buffets platform modeling and motion analysis, designs input motion, such as motion conditions are platform
Amplitude 0.55, vibration frequency 22Hz, set platform to move input, and inputted according to motion and carry out motion simulation calculating.Platform is transported
The platform motion simulation parameter of dynamic parameter as shown in Figure 8.Driving force under platform motion conditions is calculated by motion simulation
Situation, require, associated drives power is such as in the case of drawing platform kinematic parameter highest by motion analysis according to platform motion index
Shown in Fig. 9.Calculated by motion simulation under different motion state, motion analysis ratio under final simulation calculation checking computations and different situations
Compared with determining shake table driving force situation, according to emulation data comparison and related Choosing Type Analysis, determine that master driver Motor torque is
20NM, 1500 revs/min of rotating speed.Determine after overall structure and relevant parameter by design software to the main of total
Support section and rotation running part carry out Mechanical Structure Strength check.Analyzed according to design feature and relative motion, it is determined that this
The easily worn part of platform, and important Parts are determined that it is, related force analysis and correlation computations are carried out to important Parts by software, really
Protect integrally-built intensity and meet application.
Except above-mentioned buffeting platform, the present invention also provides a kind of flight simulation system for including the buffeting platform, the flight
Other Each parts of simulation system refer to prior art, will not be described here.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (8)
1. a kind of buffeting platform for flight simulation system, it is characterised in that including supporting the upper mounting plate (1) of cockpit, passing through
Leg assembly (2) supports the lower platform (3) of the upper mounting plate (1), and the vibrating mechanism being installed on the lower platform (3) and
Amplitude adjustment mechanism；
Eccentric wheel (42) of the vibrating mechanism including motor (41), with the output shaft drive connection of the motor (41), and with
The drive link group of eccentric wheel (42) Joint；The drive link group includes guide rod (43) and vibrating arm (44), described to lead
Connect to bar (43) with the eccentric wheel (42), the top of the vibrating arm (44) is resisted against the upper mounting plate (1)；
The amplitude adjustment mechanism includes telescoping cylinder (51), the sliding block (52) affixed with the cylinder rod of the telescoping cylinder (51), and opens
Guide rail (53) on the lower platform (3)；The sliding block (52) and the guide rod (43) slidable connection, the vibration
Bar (44) is fixedly connected with the sliding block (52).
2. buffeting platform according to claim 1, it is characterised in that the leg assembly (2) includes supporting leg body (21)
With spring buffer structure (22), the supporting leg body (21) is installed on the lower platform (3), and the spring buffer structure (22) sets
It is placed between the supporting leg body (21) and the upper mounting plate (1).
3. buffeting platform according to claim 2, it is characterised in that the spring buffer structure (22) includes and the branch
The affixed spring firm banking (221) of leg body (21), the guiding support bar for being installed on the spring firm banking (221)
(222) spring (223) of the guiding support bar (222), is sheathed on, and is fixed in the gland of the support bar top
(224)。
4. according to the buffeting platform described in claim any one of 1-3, it is characterised in that the upper mounting plate (1) and lower platform (3)
It is rectangular platform, the leg assembly (2) is four groups, and each leg assembly (2) is divided into the corner of the rectangular platform.
5. according to the buffeting platform described in claim any one of 1-3, it is characterised in that the upper mounting plate (1) and/or it is described under
Platform (3) is tower structure.
6. buffeting platform according to claim 5, it is characterised in that be provided with branch on the axis of the lower platform (3)
Beam is supportted, the vibrating mechanism and the amplitude adjustment mechanism are mounted in the support beam.
7. according to the buffeting platform described in claim any one of 1-3, it is characterised in that the motor (41) is servomotor
(41)。
8. a kind of flight simulation system, it is characterised in that including the buffeting platform as described in claim any one of 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222800.8A CN107845307A (en) | 2017-11-29 | 2017-11-29 | A kind of flight simulation system and its buffeting platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222800.8A CN107845307A (en) | 2017-11-29 | 2017-11-29 | A kind of flight simulation system and its buffeting platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107845307A true CN107845307A (en) | 2018-03-27 |
Family
ID=61680405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711222800.8A Pending CN107845307A (en) | 2017-11-29 | 2017-11-29 | A kind of flight simulation system and its buffeting platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107845307A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110619781A (en) * | 2019-09-30 | 2019-12-27 | 中仿智能科技（上海）股份有限公司 | Cockpit system of simulated aircraft |
| CN114345691A (en) * | 2022-03-22 | 2022-04-15 | 山东省地质矿产勘查开发局第四地质大队(山东省第四地质矿产勘查院) | A level screening plant for geological mineral exploration |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393040A (en) * | 2008-10-20 | 2009-03-25 | 北京航空航天大学 | Platform for detecting vibration adsorption capacity of wall climbing robot |
| CN203910062U (en) * | 2014-02-27 | 2014-10-29 | 中国人民解放军空军第一航空学院 | Helicopter cabin base plate dynamic simulation platform |
| CN204215592U (en) * | 2014-09-10 | 2015-03-18 | 昆山航理机载设备有限公司 | Shake platform is trembled in a kind of emulation |
| CN208271419U (en) * | 2017-11-29 | 2018-12-21 | 北京摩诘创新科技股份有限公司 | A kind of flight simulation system and its buffet platform |
-
2017
- 2017-11-29 CN CN201711222800.8A patent/CN107845307A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393040A (en) * | 2008-10-20 | 2009-03-25 | 北京航空航天大学 | Platform for detecting vibration adsorption capacity of wall climbing robot |
| CN203910062U (en) * | 2014-02-27 | 2014-10-29 | 中国人民解放军空军第一航空学院 | Helicopter cabin base plate dynamic simulation platform |
| CN204215592U (en) * | 2014-09-10 | 2015-03-18 | 昆山航理机载设备有限公司 | Shake platform is trembled in a kind of emulation |
| CN208271419U (en) * | 2017-11-29 | 2018-12-21 | 北京摩诘创新科技股份有限公司 | A kind of flight simulation system and its buffet platform |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110619781A (en) * | 2019-09-30 | 2019-12-27 | 中仿智能科技（上海）股份有限公司 | Cockpit system of simulated aircraft |
| CN114345691A (en) * | 2022-03-22 | 2022-04-15 | 山东省地质矿产勘查开发局第四地质大队(山东省第四地质矿产勘查院) | A level screening plant for geological mineral exploration |
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