CN103542982B - Large-scale structure body moment of inertia measurement system - Google Patents
Large-scale structure body moment of inertia measurement system Download PDFInfo
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- CN103542982B CN103542982B CN201310565542.9A CN201310565542A CN103542982B CN 103542982 B CN103542982 B CN 103542982B CN 201310565542 A CN201310565542 A CN 201310565542A CN 103542982 B CN103542982 B CN 103542982B
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- 238000005259 measurement Methods 0.000 title claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims description 12
- 108091008695 photoreceptors Proteins 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The invention discloses a large-scale structure body rotational inertia measuring system which comprises a bottom plate, wherein a y-direction measuring system or an x-direction measuring system is arranged on the bottom plate. The system can separately measure the rotational inertia in the x direction and the y direction of a measured product, and the measurement in the x direction and the measurement in the y direction can be completed on the premise that a measured piece is not turned over by the same test board; the invention adopts a rolling support mode combining the bearing assembly and the roller bearing, thereby greatly reducing the influence of system damping and improving the measurement precision of the system; the invention has strong universality, can measure large-scale structural bodies with different shapes and specifications, and has the advantages of high measurement precision, wide test range, low equipment cost and convenient maintenance.
Description
Technical field
The present invention relates to machinery and technical field of transportation, particularly a kind of large structure turns
Dynamic used system for measuring quantity.
Background technology
The tolerance of inertia when rotary inertia is Rigid Body in Rotation With, every rotational power that relates to
Problem, rotary inertia is focus measurement parameter.In national defense industry, various guided missiles, unmanned
Aircraft and underwater unmanned vehicle are required to measure its pole, equator moment of inertia, in order to really
Determine their initial disturbance and traveling stability；
In the existing list of references about rotation inerttia and patent, it then follows ultimate principle
It is: utilize flexible member to form oscillatory system, calculates that rotation is used by system oscillation frequency
Amount.Main measuring method is: compound pendulum, Inertia Based on Torsion Pendulum Method, three-line pendulum method, single line arrangement and fall
Body method etc..But owing to being limited by Design of Mechanical Structure and testee shape difference, for
The measuring method of large structure is less.Document be " large revolving body Measurement System of " Moment of Inertia
Design " give a kind of relatively advanced measurement system for large-sized object, but this system is solid
Determining mechanism uses ball to support, and is point cantact, when measured piece quality is bigger, and system damping
Greatly, it addition, when measured piece surface is the most coarse, point cantact can cause bigger damping fluctuation,
All the measuring precision can be brought the biggest impact.Meanwhile, this system is equal only for Mass Distribution
The large revolving body that even, shape is single, and relatively big for shape difference, Mass Distribution inequality
Product, this system cannot be measured.I.e. for being shaped as the guided missile of non-single revolving body, nothing
The rotation inerttia of the objects such as people's aircraft, underwater unmanned vehicle, this system is the most applicable.
Summary of the invention
The technical problem to be solved is, not enough for prior art, it is provided that Yi Zhongjie
Structure is simple, easily operates, the large structure rotary inertia survey that certainty of measurement is high, applied widely
Amount system.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: a kind of large-scale knot
Structure body Measurement System of " Moment of Inertia, including base plate, its architectural feature is:
When being used for measuring large structure y to rotary inertia, described base plate is provided with y to
Measurement system；Described y to measurement system include being fixed on base plate for for tested structure
Y is provided to be fixed with supporting to rotating cylinder assembly, described y to rotating cylinder assembly upper end to the y of torsional moment
Plate, described support plate has been horizontally disposed with two closed slides, every guide rail has been provided with one
More than can along the slide block of described slide, two closed slides relative to the y on position to measurement
Slide block is one group, and often group y is fixed with one for fixing tested structure on measurement slide block
Fixed mechanism；It is provided with on described support plate for measuring described y to measuring slide block sliding distance
Grating scale；Described support plate lower surface is fixed with y to measuring photometer head；On described base plate admittedly
Surely have with described y to measuring the supporting y of photometer head to measuring photoreceptors；
When being used for measuring large structure x to rotary inertia, described base plate is provided with x to
Measurement system；Described x includes two x being set in parallel in described base plate one end to measurement system
To measuring horizontal guide rail；Described two x are each provided with more than one on measurement horizontal guide rail can
Along described x to measuring the x of horizontal guide rail slip to measuring slide block；Two x lead to measurement level
Rail is one group relative to the x on position to measuring slide block, and often group x is fixed with one to measuring on slide block
Individual bracing frame；Support frame as described above top with for for described tested structure provide x to torsional moment
X to reversing, assembly one end is fixing to be connected；Described x is tested with described to reversing the assembly other end
Structure one end connects；Described x to reverse assembly lower surface be fixed with x to measure photometer head,
Described x is fixed with on the base plate measuring horizontal guide rail one end and joins to measuring photometer head with described x
The x of set is to measuring photoreceptors.
Described support plate lower surface offers cannelure；Described y includes fixing perpendicular to rotating cylinder assembly
The straight y arranged is to rotating cylinder, and described y is straight to rotating cylinder upper end less than described y to rotating cylinder bottom diameter
Footpath, described y embeds described cannelure to rotating cylinder upper end, and described y passes through to rotating cylinder bottom to connect
Ring is connected with described base plate；Described y is vertically provided with y to torsion bar in rotating cylinder, and described y is to torsion
Bar upper end is fixing with the support plate lower surface in described cannelure to be connected, and described y is to torsion bar lower end
It is connected through described connection ring and described base plate are fixing；Described y is cased with bottom outside rotating cylinder and fixes
Protection cylinder on described base plate；Described protection cylinder upper end, y divide relative to position to rotating cylinder upper end
It is not provided with groove and boss, is provided with y in described groove to measuring roller bearing, and described y
Fit with described boss upper surface to measuring roller bearing；Described y is less to rotating cylinder bottom diameter
The concave station that part is formed between rotating cylinder with the y in this part is placed on described connection on ring
On thrust ball bearing；Described protection cylinder bottom inner bulge, this bossing and described thrust ball
Bearing touch.
Described x to reverse assembly include the x of one end open to fixing cylinder, x to rotating cylinder；Described
X is connected by contiguous block and support frame as described above top are fixing to fixing cylinder；Described x is to fixing cylinder
It is connected away from face, not opening bottom inwall and the x of tested structure is fixing to torsion bar one end；Described
X is less than other end diameter to rotating cylinder one end diameter；Described x is to the close tested structure of fixing cylinder
One end be enclosed within described x by x on one end that basket diameter is less to roller bearing；Described
X to the less one end of basket diameter and consolidates through described x to one end of the close tested structure of torsion bar
Fixed；Described x is tested with described by connecting ring to one end of fixing cylinder away from described x to rotating cylinder
Structure is fixing to be connected.
Described y includes two fixed mechanisms to measurement system；Described fixed mechanism includes fixing
Ring, fixed ring inwall is by multiple bearing assemblies being equidistantly spaced from and rotates outside snap ring
Wall contact, and described rotation snap ring can with through the described rotation snap ring center of circle and with described rotate card
Rotate centered by the axle that ring place plane is vertical；Fixed ring, rotation snap ring are concentric；Institute
State rotation snap ring internal diameter to mate with described tested structure external diameter size；Described extenal fixation ring passes through
To measuring, slide block is fixing to be connected base with described y.
Compared with prior art, the had the beneficial effect that present configuration of the present invention is simple,
Easily operation, it is adaptable to the measurement of large structure rotary inertia；Test product x to y to turn
The measurement of dynamic inertia is separately carried out, it is achieved complete under same testboard is not to measured piece upset premise
Become x to, y to the measurement of both direction；The present invention uses bearing assembly to tie mutually with roller bearing
The supporting way closed, greatly reduces system damping impact, improves the measuring precision；This
Invention highly versatile, can realize not similar shape to rotating cylinder with x by changing different fixed mechanism
The large product of shape is measured；And when product is measured, it is only necessary to regulate corresponding fastening bolt just
The location of product can be realized and fix, easy to operate, simply；The present invention has abandoned prior art
The complicated automation equipment made earnest efforts, greatly reduces cost of equipment；Photometer head and photoreceptors dismounting
Convenient, can independently demarcate；Certainty of measurement of the present invention is high, test wide ranges, equipment cost
Low, easy to maintenance；The present invention can be widely used in space flight, aviation, navigation, weapons, machinery,
The scientific research such as motor and biomechanics, production field, have great practical value.
Accompanying drawing explanation
Fig. 1 is one embodiment of the invention structural representation；
Fig. 2 is that one embodiment of the invention y is to rotating cylinder modular construction schematic diagram；
Fig. 3 is that one embodiment of the invention x is to reversing modular construction schematic diagram；
Fig. 4 is one embodiment of the invention fixed structure schematic diagram.
Detailed description of the invention
As it is shown in figure 1, one embodiment of the invention includes base plate 11, when being used for measuring large-scale knot
Structure body y, when rotary inertia, described base plate 11 is provided with y to measurement system；Described y
To measurement system include being fixed on base plate 11 for providing y to torsion for tested structure 5
The y of moment is to rotating cylinder assembly, and described y is fixed with support plate 9 to rotating cylinder assembly upper end, described
Be horizontally disposed with two closed slides 6 on support plate 9, every guide rail 6 is provided with one with
On can along described guide rail 6 slide slide block 7, the y on two relative positions of closed slide 6 to
Measuring slide block 7 is one group, often group y to measure be fixed with on slide block 7 one tested for fixing
The fixed mechanism of structure 5；It is provided with on described support plate 9 for measuring described y to measurement
The grating scale of slide block 7 sliding distance；Described support plate 9 lower surface is fixed with y to measuring photoelectricity
8；It is fixed with on described base plate 11 with described y to measuring the supporting y of photometer head to measurement
Photoreceptors 10；When being used for measuring large structure x to rotary inertia, on described base plate 11
X is installed to measurement system；To measurement system, described x includes that two are set in parallel in the described end
The x of plate 11 one end is to measuring horizontal guide rail 15；Described two x are to measuring horizontal guide rail 15
On be each provided with more than one can along described x to measure horizontal guide rail 15 slide x to measurement
Slide block 14；Two x to the x measured on the relative position of horizontal guide rail 15 to measurement slide block 14
Being one group, often group x is fixed with a bracing frame 1 on measurement slide block 14；Support frame as described above 1
Top with for for described tested structure 5 provide x to the x of torsional moment to reverse assembly one end
Fixing connection；Described x is connected with described tested structure 5 one end to reversing the assembly other end；
Described x to reverse assembly lower surface be fixed with x to measure photometer head 2, described x to measure water
It is fixed with on the base plate 11 of level gauge 15 one end with described x to measuring the x that photometer head 2 is supporting
To measuring photoreceptors 13.
Such as Fig. 2, support plate 9 lower surface offers cannelure；Described y includes to rotating cylinder assembly
The fixing y being vertically arranged is less than described y to rotating cylinder 18, described y to rotating cylinder 18 bottom diameter
To rotating cylinder 18 upper end diameter, described y embeds described cannelure, described y to rotating cylinder 18 upper end
It is connected with described base plate 11 by connection ring 20 to rotating cylinder 18 bottom；Described y is to rotating cylinder 18
The most vertically be provided with y to torsion bar 19, described y in torsion bar 19 upper end with described cannelure
Board 9 lower surface is fixing to be connected, described y to torsion bar 19 lower end through described connection ring 22 with
Described base plate 11 is fixing to be connected；Described y is cased with bottom outside rotating cylinder 18 and is fixed on described base plate
Protection cylinder 21 on 11；Described protection cylinder 21 upper end, y to rotating cylinder 18 upper end relative to position
Be respectively equipped with groove and boss 12, be provided with in described groove y to measure roller bearing 16,
And described y fits with described boss 12 upper surface to measuring roller bearing 16；Described y is to turning
The concave station that y in cylinder 18 bottom diameter smaller portions and this part is formed between rotating cylinder 18 is put
Put on the thrust ball bearing 22 on described connection ring 22；Inside described protection cylinder 21 bottom
Projection, this bossing contacts with described thrust ball bearing 22.
As Fig. 3, x include fixing, with support frame as described above 1 top, the one end being connected to reversing assembly
The x of opening to fixing cylinder 24, x to rotating cylinder 26；Described x passes through contiguous block to fixing cylinder 24
29 fixing with support frame as described above 1 top are connected；Described x to fixing cylinder 24 away from by geodesic structure
Face, the not opening bottom inwall of body 5 is fixing to torsion bar 23 one end with x to be connected；Described x is to turning
Cylinder 26 one end diameters are less than other end diameter；Described x to fixing cylinder 24 near tested structure
One end of 5 is enclosed within described x to the less one end of rotating cylinder 26 diameter by x to roller bearing 25
On；Described x passes described x to rotating cylinder 26 to torsion bar 23 near one end of tested structure 5
The less one end of diameter is also fixed；Described x to rotating cylinder 26 away from described x to the one of fixing cylinder 24
Hold and be connected by connection ring 27 is fixing with described tested structure 5.
As Fig. 4, y include two fixed mechanisms to measurement system；Outside described fixed mechanism includes
Retainer ring 32, described extenal fixation ring 32 inwall passes through multiple bearing assemblies 31 being equidistantly spaced from
With rotate snap ring 33 wall contacts, and described rotation snap ring 33 can be with through described rotation snap ring
Rotate centered by 33 centers of circle and the axle vertical with described rotation snap ring 33 place plane；Outside described
Retainer ring 32, rotation snap ring 33 are concentric；Described rotation snap ring 33 internal diameter and described tested knot
Structure body 5 external diameter size is mated；Described extenal fixation ring 32 passes through base 34 with described y to measurement
Slide block 7 is fixing to be connected.Rotate snap ring 33 outer wall and offer groove, the axle on bearing assembly 31
Holding 35 to contact with groove, rotating snap ring can rotate relative to bearing 35.
Tested structure 5 is positioned in rotation snap ring 33, adjusts fastening bolt 30 so that it is with
Tested structure 5 posts and fixes；By changing bearing assembly 31 and rotating snap ring 33 with suitable
Answer the tested structure of different size size, along guide rail 6 move y to measure slide block slide block 7,
Thus change the tested structure 5 position on support plate 9.
Y is spirally connected to torsion bar 19 and is fixed on support plate 9 lower surface center, and y is to torsion bar 19 lower end
Become cross key, insert the cross recess of lower shoe 11 middle part.During measurement, y is to torsion bar 19
Being limited by cross recessed, it is provided that rock moment of torsion, y supports support plate 9 around y-axis to rotating cylinder 18
Rotate.
X is to the less Step Shaft that one end is inner threaded hole of rotating cylinder 26 diameter, and x is to torsion bar
23 two ends processing screw threads, roller bearing 25 inner ring is enclosed within x on rotating cylinder Step Shaft, Roller Shaft
Hold 25 outer rings and be arranged on x to fixing cylinder 24 on the step of tested structure 5 one end；x
A tapped through hole is set away from tested structure 5 one end, with x to torsion bar 23 spiral shell to fixing cylinder 24
Connect and fixed by nut, by change replacing x to rotating cylinder 26 and adapter ring 28, and changing
X, to measuring slide block at x to the position measured on horizontal guide rail, adapts to the quilt of different size specification
Geodesic structure part.
Apparatus of the present invention are utilized to carry out the process of rotation inerttia as follows:
Reliable for ensureing measured piece measurement result, a standard component need to be prepared, for regular shape,
The standard component of uniform quality distribution, can determine its centroid position and rotation very well by Theoretical Calculation
Inertia, if turn total with measured piece of system zero load rotary inertia, standard component rotary inertia, system
Dynamic inertia is respectively as follows: I0、Ib、Id2；Unloaded damped oscillation frequency, system are total with standard component
Damped oscillation frequency, the system damped oscillation frequency total with measured piece is respectively as follows: ωd0、ωd1、ωd2,
Then system is freely rocked oscillation equation and be can be described as:
In formula: θ is for rocking angle；C is damped coefficient；K is torsion bar stiffness coefficient.
Order
In formula: ωn0For system frequency, ζ is system damping.
Can obtain:
Above formula is system damping oscillation frequency equation.One large structure of the present invention rotates used
System for measuring quantity rocks as damped oscillation, support rotating assembly employing bearing assembly and roller bearing
Combination, greatly reduces system damping impact, and being analyzed damping effect of the present invention can
Knowing, damping effect of the present invention is little, and system test precision is high, and derivation can obtain:
In above formula, I is measured piece rotary inertia.
Standard component measuring process is:
(1): frock prepares, guide rail 6 is coordinated with y to measuring slide block 7 and is fixed on support plate
On 9, fixed mechanism base and y are spirally connected fixing to measuring slide block 7, adjust phase para-position
Put, bearing assembly is installed in extenal fixation ring；Y is closed according to assembling to rotating cylinder assembly
System carries out assembling and ensureing the alignment of parts；By y to rotating cylinder assembly respectively with upper supporting
Plate and the fixing connection of base plate；Install y to measuring photometer head with y to measuring photoreceptors；
(2) standard component is installed, and standard component is put into rotation snap ring, then will rotate snap ring together with mark
Quasi-part is positioned on bearing assembly；Adjust fastening bolt, make bolt contact with standard component,
Change fastening bolt relative position, make standard component symmetrical, stable be fixed on support plate；
Demarcate standard component barycenter, mobile slide block, make barycenter overlap with O point；
(3) demarcation y is to measuring photometer head with y to measuring photoreceptors, and controller, industrial computer are ready；
(4) being turned an angle around y-axis by standard component and then discharge, y is to measuring photometer head and y
To measuring photoreceptors record related data and passing to industrial computer, industrial computer backstage processes
And show that its y is to damped oscillation frequencies omegab1；Number is accurately measured for ensureing to obtain
According to, the anglec of rotation of standard component should be greater than 5 °, ensures that y does not breaks to torsion bar simultaneously
Splitting, the concrete anglec of rotation is depending on standard component size and y are to torsion bar intensity；
(5) being assembled to reversing assembly by x, x is inserted in from standard component head to rotating cylinder, regulation
Fixing bolt, makes x coaxial with standard component to rotating cylinder；
(6) demarcate x to photoelectric sensor, and standard component is rotated to an angle around x-axis then release
Putting, photosensors record related data also passes to industrial computer, at industrial computer backstage
Manage and show that its x is to damped oscillation frequencies omegad1；
(7) being taken off by standard component, y during measurement system zero load is to damped oscillation frequencies omegab0, x
To damped oscillation frequencies omegad0；And above data measured is stored in industrial computer, survey later
Amount directly invokes.
When tested structure is unsymmetric structure, fastening bolt is circumferentially asymmetric adjustment,
I.e. fastening bolt can bring error to system rotation inerttia；But fastening bolt Mass Distribution is led
The amount causing rotary inertia change is minimum relative to the rotary inertia value of measured piece, therefore its impact
Negligible.The object that cannot determine for centroid position, uses shift method to measure,
Parallel axes shifting principle is utilized to have:
Iy+mr2=I1
In formula, IyObject is about the rotary inertia of mass axis, and r is that rotating shaft is vertical with mass axis
Distance, I1For object about the rotary inertia of rotating shaft.
Tested structure rotation inerttia step is as follows:.
(1) tested structure is installed, with reference to abovementioned steps one, step 2, step 3, step 5
And step 6, tested structure is installed on measuring table, and demarcates photoelectric sensor
(i.e. photometer head and photoreceptors)；
(2) structure system for winding x-axis is rotated to an angle, the x that the system that records is total with structure
To frequency of oscillation ωx1；Adjust fastening bolt, change the position of tested construction yoz plane
Put, the position of record any two points, it is desirable to these 2 are not straight at one with initial point 3
On line, measure the frequency of oscillation of its correspondence, by calculating, it may be determined that structure crosses barycenter
X-axis, and obtain the structure rotary inertia I around this axlex；
(3) remove x-axis and reverse assembly, adjust tested structure, make system y-axis and definition
Structure y-axis is parallel, and the x-axis making system x-axis determine with step 2 overlaps, will be by
Geodesic structure body rotates to an angle around y-axis, records its frequency of oscillation ωy1；Adjust fastening spiral shell
Bolt, changes tested structure position along x-axis, records distance x1, survey by abovementioned steps
Obtain frequency of oscillation ωy2；By calculating, it may be determined that structure crosses the y-axis of barycenter, and obtains
Structure is around the rotary inertia I of this axley；
(4) adjust structure, make system y-axis determine that y-axis overlaps with step 3, snap ring will be rotated
Around x-axis half-twist, structure can be recorded around z-axis rotary inertia I by abovementioned stepsz。
Claims (3)
1. a large structure Measurement System of " Moment of Inertia, including base plate (11), it is characterised in that:
When being used for measuring large structure y to rotary inertia, described base plate (11) is provided with y to measurement system；Described y to measurement system include being fixed on base plate (11) for providing y to the y of torsional moment to rotating cylinder assembly for tested structure (5), described y is fixed with support plate (9) to rotating cylinder assembly upper end, two closed slides (6) it have been horizontally disposed with on described support plate (9), being provided with more than one on every guide rail (6) can be along the y that described guide rail (6) slide to measuring slide block (7), y on two closed slide (6) positions relatively is one group to measuring slide block (7), often group y is fixed with one for the fixed mechanism fixing tested structure (5) in measurement slide block (7)；It is provided with on described support plate (9) for measuring described y to the grating scale measuring slide block (7) sliding distance；Described support plate (9) lower surface is fixed with y to measuring photometer head (8)；It is fixed with on described base plate (11) with described y to measuring the supporting y of photometer head to measuring photoreceptors (10)；
When being used for measuring large structure x to rotary inertia, described base plate (11) is provided with x to measurement system；To measurement system, described x includes that two x being set in parallel in described base plate (11) one end are to measuring horizontal guide rail (15)；Described two x to measure be each provided with more than one on horizontal guide rail (15) can be along described x to measuring x that horizontal guide rail (15) slides to measuring slide block (14)；Two x are one group to the x measured on horizontal guide rail (15) position relatively to measuring slide block (14), and often group x is fixed with a bracing frame (1) on slide block (14) to measuring；Support frame as described above (1) top is with for providing x for described tested structure (5), to the x of torsional moment, to reversing, assembly one end is fixing to be connected；Described x is connected with described tested structure (5) one end to reversing the assembly other end；Described x is fixed with x to measuring photometer head (2) to reversing assembly lower surface, and described x is fixed with described x to measuring photometer head (2) supporting x to measuring photoreceptors (13) on the base plate (11) measuring horizontal guide rail (15) one end；
Described y includes two fixed mechanisms to measurement system；Described fixed mechanism includes extenal fixation ring (32), described extenal fixation ring (32) inwall is by multiple bearing assemblies (31) being equidistantly spaced from and rotation snap ring (33) wall contacts, and described rotation snap ring (33) can be to rotate centered by described rotation snap ring (33) center of circle and the axle vertical with described rotation snap ring (33) place plane；Described extenal fixation ring (32), rotation snap ring (33) are with one heart；Described rotation snap ring (33) internal diameter mates with described tested structure (5) external diameter size；By base (34), to measuring, slide block (7) is fixing to be connected described extenal fixation ring (32) with described y；
Tested structure (5) is positioned in rotation snap ring (33), and fastening bolt (30) posts and fixes with tested structure (5)；By changing bearing assembly (31) and rotating snap ring (33) to adapt to the tested structure of different size size, along the mobile y of guide rail (6) to measurement slide block (7), thus change the tested structure (5) position on support plate (9).
Large structure Measurement System of " Moment of Inertia the most according to claim 1, it is characterised in that described support plate (9) lower surface offers cannelure；To rotating cylinder assembly, described y includes that the fixing y being vertically arranged is to rotating cylinder (18), described y is less than described y to rotating cylinder (18) upper end diameter to rotating cylinder (18) bottom diameter, described y embeds described cannelure to rotating cylinder (18) upper end, and described y is connected with described base plate (11) by the first connection ring (20) to rotating cylinder (18) bottom；Described y is vertically provided with y to torsion bar (19) in rotating cylinder (18), described y is fixing with support plate (9) lower surface in described cannelure to torsion bar (19) upper end to be connected, and described y is connected through described first connection ring (20) is fixing with described base plate (11) to torsion bar (19) lower end；Described y is cased with the protection cylinder (21) that bottom is fixed on described base plate (11) outside rotating cylinder (18)；Described protection cylinder (21) upper end, y are respectively equipped with groove and boss (12) to rotating cylinder (18) upper end relative to position, be provided with in described groove y to measure roller bearing (16), and described y to measure roller bearing (16) with described boss (12) upper surface fit；Described y is placed on the described first thrust ball bearing (22) being connected on ring (20) to the concave station that rotating cylinder (18) bottom diameter smaller portions are formed between rotating cylinder (18) with the y in this part；Described protection cylinder (21) bottom inner bulge, this bossing contacts with described thrust ball bearing (22).
Large structure Measurement System of " Moment of Inertia the most according to claim 1, it is characterised in that described x to reverse assembly include the x of one end open to fixing cylinder (24), x to rotating cylinder (26)；Described x is connected by contiguous block (29) and support frame as described above (1) top are fixing to fixing cylinder (24)；Described x is connected away from face, not opening bottom inwall and the x of tested structure (5) is fixing to torsion bar (23) one end to fixing cylinder (24)；Described x is less than other end diameter to rotating cylinder (26) one end diameter；Described x is enclosed within described x to one end that rotating cylinder (26) diameter less on by x to roller bearing (25) near one end of tested structure (5) to fixing cylinder (24)；Described x and fixes through described x to the less one end of rotating cylinder (26) diameter near one end of tested structure (5) to torsion bar (23)；Described x is connected by the second connection ring (27) and described tested structure (5) are fixing to one end of fixing cylinder (24) away from described x to rotating cylinder (26).
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| CN201310565542.9A CN103542982B (en) | 2013-11-14 | 2013-11-14 | Large-scale structure body moment of inertia measurement system |
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| CN201310565542.9A CN103542982B (en) | 2013-11-14 | 2013-11-14 | Large-scale structure body moment of inertia measurement system |
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|---|---|---|---|---|
| CN105509963B (en) * | 2015-11-28 | 2018-01-02 | 西安百纳电子科技有限公司 | A kind of guided missile rolling direction rotation inerttia device and method |
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