CN107590332A - A kind of modularization redesign method of public transport chassis - Google Patents
A kind of modularization redesign method of public transport chassis Download PDFInfo
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- CN107590332A CN107590332A CN201710794632.3A CN201710794632A CN107590332A CN 107590332 A CN107590332 A CN 107590332A CN 201710794632 A CN201710794632 A CN 201710794632A CN 107590332 A CN107590332 A CN 107590332A
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Abstract
The invention discloses a kind of modularization of public transport chassis to redesign method.Public transport chassis is subjected to module cutting；Analyze needs pre- increase and decrease, optimization or the module replaced because the market demand changes；Evaluation analysis is carried out to the structure connection degree of intermodule, the priority of module redesign or reconstruct is confirmed according to the evaluation result of correlation degree；Primary and secondary module is redesigned or reconstructed successively in the case where meeting the attachable concerns mandate of interface, new public transport chassis is obtained finally by module restructuring.The present invention efficiently utilize it is original design a model and concept, design cost and the cycle of product is greatly reduced, improves product design and development efficiency.
Description
Technical field
The invention belongs to technical field of automobile design, a kind of more particularly to modularization redesign method of public transport chassis.
Background technology
In recent years, numerous bus and coach enterprises are proposed new energy public transport for the call of response national energy-saving emission reduction, and new energy is public
Family's covering fuel cell, hybrid power, pure a variety of power forms such as electronic are handed over, wherein public transport chassis is the main of dynamical system
Carrying and installation unit, pay the utmost attention to design.The design method generally taken in the market is Customer-Demand-Oriented
Order form development approach, new energy family product is seriatim developed using this method can greatly increase product design,
Manufacturing cost, and substantial amounts of human and material resources, financial resources will be expended, pole is unfavorable for the development of enterprise.
Know aftersensation after the design method of traditional order form, it is impossible to effectively act as the guiding function to market；Towards order
Targetedly single exploitation can not be designed a model and concept demand using existing well, the design cycle length of new product, be opened
It is high to send out cost, constrains the development of public transport art.
The content of the invention
In order to solve the technical problem that above-mentioned background technology proposes, the present invention is intended to provide a kind of modularization of public transport chassis
Redesign method, overcomes that the prior art cycle is long, cost is high, it is impossible to designed a model and design concept using existing well,
The product design renewal problem such as efficiency is low.
In order to realize above-mentioned technical purpose, the technical scheme is that：
A kind of modularization redesign method of public transport chassis, comprises the following steps：
(1) Module Division is carried out to public transport chassis；
(2) demand in user or market is analyzed, by the target signature parameter that Demand mapping is public transport chassis, it is determined that needing to change
The module entered, optimize or replaced；
(3) characteristic parameter of each module is extracted, the correlation degree modular structure is evaluated；
(4) priority for redesigning or reconstructing according to the evaluation result definition module of correlation degree, defines correlation degree
Highest module is initial primary module, and other modules are followed successively by secondary module；
(5) initial primary module is redesigned or reconstructed according to the mapping result of market or user's request；
(6) in the case where the interface of primary and secondary module can realize connection, the secondary module of pre-connection is redesigned or
Reconstruct；
(7) connection of primary and secondary module is realized, obtains new composite module, and checks the composite module function and structure
Integrality；
(8) using new composite module as new primary module, repeat step (6), (7), until completing all modules again
Design or reconstruct, and the connection of all modules is realized, obtain complete public transport chassis product；
(9) integrality of complete public transport chassis product function and structure is detected.
Further, in step (1), internal cause and the external cause of product are considered to carry out Module Division, internal cause refers to
The correlation properties of its product in itself in the case where the principle of work and power determines, including functional dependency, structural dependence and physics phase
Guan Xing, external cause refer to the change of customer demand, including the change of functional domain scope and the power of function or the change of size.
Further, in step (1), by public transport chassis be divided into preceding root module, front overhang framework module, middle root module,
Rear overhang framework module and rear root module.
Further, the front-end module includes upper objective door region, driver area and a few passengers standing area；Before described
Phragma frame module includes both sides hindered phenolic and central channel region；The middle root module includes most passenger standing areas with
Objective door region；The rear overhang framework module includes both sides hindered phenolic and central channel region；The bottom of root module is after described
Device bearing area, the top of rear root module is more people hindered phenolics.
Further, in step (2), the characteristic parameter of the preceding root module includes leading portion beam overall, leading portion overall length, upper visitor
Gate-width degree, get-off door length, upper objective door riser height and driver's floor level；The characteristic parameter of the front overhang framework module includes
Front overhang skeleton beam overall, front overhang skeleton overall length, walkway clearance, front tread, front overhang foot-operated height, length of the bridge floor level and seat are fixed
Highly；The characteristic parameter of the middle root module includes stage casing beam overall, stage casing overall length, main longitudinal grider spacing, get-off door width, get-off door
Length, get-off door riser height and double-decker part height；The characteristic parameter of the rear overhang framework module include back segment beam overall, after
Duan overall lengths, main longitudinal grider interval width and more people's height of seats.
Further, in step (3), according to the characteristic parameter of module, the structure connection matrix of module is established, according to closing
Connection degree calculation formula calculates the degree of association of modules.
Further, each row in structure connection matrix M, matrix M are built and represent characteristic parameter different in same module,
Represented per a line from disparate modules but the characteristic parameter of association be present, the element M in matrix MijRepresent the i-th of j-th of module
Individual characteristic parameter, works as MijFor 0 when, represent that this module is not present this characteristic parameter, i.e. the Xiang Te of this module and other modules
Relevance is not present in sign, works as MijWhen not being 0, show that this module has this characteristic parameter, if the i-th row has another not simultaneously
Then represent that the module corresponding to the two real number values has relevance with regard to this characteristic parameter for 0 real number value；
The characteristic parameter of each module and the associated weights grade of other modular character parameters are analyzed successively, will be with a certain feature
Other characteristic parameters of parameter association weighting levels identical are put in order in same a line, then derive relating module numerical matrix M '：
Element M in matrix MijFor 0 and simultaneously i-th row to co-exist in k be not 0 real number value when, represent j-th of module i-th
Relating module numerical value on individual characteristic parameter is k, obtains the relating module numerical matrix M ' of the module by that analogy；
The associated weights grade of each characteristic parameter of certain module is analyzed, establishes module relation weighting levels matrix Q, then the mould
The structure connection degree α of block calculation formula is as follows：
In above formula, l is the number of the modular character parameter.
The beneficial effect brought using above-mentioned technical proposal：
The present invention is carried out again by the way that chassis is carried out into module cutting on the basis of the evaluation of structure connection degree to chassis module
Design or reconstruct, new public transport chassis is obtained by module restructuring, realize foundation in original model and notional product again
Design, is greatly reduced design cycle and cost, improves the design update efficiency of product.
Brief description of the drawings
Fig. 1 is public transport chassis division schematic diagram of the present invention；
Fig. 2 is the flow chart of the present invention.
Embodiment
Below with reference to accompanying drawing, technical scheme is described in detail.
Design Structure Model (design structure matrix, DSM) be Steward develop be used for product
Development process carries out the matrix tool of planning application.It is to express in complex process information between variable indirectly in the matrix form
Dependence, Behavior-based control, parts, parameter and the classes of the DSM of team tetra- can be divided into according to application mode.Extract product form mould
The structural characteristic parameter of block, the DSM models based on parameter are established, numeral is carried out to the correlation degree of intermodule by quantifying criterion
Change.The ranks element of DSM models is the structural characteristic parameter of product form module, the contact representation module knot between ranks element
Contact between structure.
The correlation degree of intermodule structural characteristic parameter is analyzed, DSM is digitized using 5 scale methods.
Table 1 is the weight of 5 types of scale method five.
Table 1
Intermodule structure connection is mutual and correlation degree is equal in magnitude, therefore DSM constructed by the present invention is one symmetrical
Matrix, as shown in table 2, the correlation degree in matrix between two parameters of row, column corresponding to each element representation element, main pair
Element on linea angulata is meaningless, with No. * replacement；Correlation degree 5 scale methods of strong and weak foundation represented by other elements are determined
Justice.Each row add up after the completion of matrix structure and collected, as characteristic parameter A-1 row collects for correlation degree A-1R, can be anti-
Reflect the correlation degree of this characteristic parameter and other modules；All characteristic parameter rows of modules A are carried out again it is cumulative collect, gained
ARReflect the correlation degree of modules A and other modules.Degree of association α is correlation degree ARThe result that quantizes.
Table 2
For avoid because the characteristic parameter of product form module is excessive and caused by DSM row, column is long and intermodule architectural feature
The problems such as incidence relation unobvious, propose the simplification quantization method of DSM a kind of.
DSM model simplifications for reflecting intermodule structure connection degree are split as structure connection matrix M.In matrix M
Each row represent characteristic parameter different in same module, are represented per a line from disparate modules but the feature ginseng of association be present
Number.Element M in matrixijThe ith feature parameter of j-th of module is represented, works as MijFor 0 when, represent that this is not present in this module
Relevance is not present in characteristic parameter, i.e. this module and this feature of other modules；Work as MijIn the presence of and be 0 when, show this mould
There is this characteristic parameter in block, exist if the i-th row simultaneously if another is not 0 real number value and represent mould corresponding to the two real number values
Certain relevance with regard to this parameter be present in block.Matrix M form is as follows：
Analyze the characteristic parameter of each module and the associated weights grade of other modular character parameters successively, will wherein with it is same
The identical other specification of characteristic parameter associated weights grade is put in order in same a line.Relating module numerical value is then derived according to matrix M
Matrix M ', matrix M ' are column matrix, and every element is all a natural number.
M′T=(a ... k ... b)
A, k, b ∈ N, the element M in matrix MijFor 0 and simultaneously i-th row to co-exist in k be not 0 real number value when, table
Show that relating module numerical value of j-th of module in ith feature parameter is k, obtain the relating module number of the module by that analogy
Value matrix M '.
The associated weights grade of each characteristic parameter of certain module is analyzed, establishes module relation weighting levels matrix Q.
QT=(c ... g ... d)
C, g, d ∈ { 0,1,2,3,4 }, the structure connection degree α calculation expressions of individual module are as follows：
In formula, l is the number of the modular character parameter, and the size by contrasting real number value α can determine that product respectively forms
The power of modular structure correlation degree.
The purpose of DSM analyses is that the correlation degree between modules characteristic parameter is analyzed, and is compared by collecting
The power of modules correlation degree is learnt afterwards.Bigger explanation module of numerical value of the intermodule degree of association and associating for other modules
Degree is stronger, i.e., when it is redesigned suffered constraint and constrain other modules ability it is bigger.By the mould that numerical value is maximum
Block is defined as initial primary module, and other modules are defined as secondary module successively.
Scholar Dai Shengliang et al. introduces modular and car vehicle skeleton is divided into six sheets：It is forward and backward to enclose skeleton, car
The left and right side wall frame of body, body understructure and roof.The present invention carries out two level division, division knot to public transport chassis on this basis
Fruit is as shown in Figure 1.
In view of the layout of integral new-energy passenger dynamical system, and the function and architectural feature of chassis itself are combined, by public transport
Chassis is divided into five modules, root module, front overhang framework module, middle root module, rear overhang framework module and back segment mould before being respectively
Block.Preceding root module mainly includes upper objective door region, driver area and a few passengers standing area, and front overhang framework module includes both sides
Hindered phenolic and central channel region, the region and get-off door region that middle root module is mainly taken for most of passenger, rear overhang
Framework module equally includes both sides hindered phenolic and central channel region, and back segment module bottom is used for carrying engine, intake and exhaust
The devices such as system, top are furnished with a small amount of seat.
The characteristic parameter of public transport chassis module after extraction cutting, analyzes the associated weights grade between parameters successively,
Build intermodule structure connection matrix M and the weighting levels matrix Q of each module.
As shown in table 3, the structure connection degree of front overhang framework module and rear overhang framework module maximum and phase in 5 modules
Deng being then middle root module and rear root module successively, the degree of association of preceding root module is minimum.According to resulting Relational Evaluation
As a result, the present invention establishes the adaptive design process model of public transport chassis using proterophragma frame module as initial primary module.Specifically
Process is as shown in Figure 2.
Table 3
The technological thought of embodiment only to illustrate the invention, it is impossible to protection scope of the present invention is limited with this, it is every according to
Technological thought proposed by the present invention, any change done on the basis of technical scheme, each falls within the scope of the present invention.
Claims (7)
1. a kind of modularization redesign method of public transport chassis, it is characterised in that comprise the following steps：
(1) Module Division is carried out to public transport chassis；
(2) demand in user or market is analyzed, Demand mapping is the target signature parameter of public transport chassis, it is determined that need to improve,
Optimization or the module replaced；
(3) characteristic parameter of each module is extracted, the correlation degree modular structure is evaluated；
(4) priority for redesigning or reconstructing according to the evaluation result definition module of correlation degree, defines correlation degree highest
Module be initial primary module, other modules are followed successively by secondary module；
(5) initial primary module is redesigned or reconstructed according to the mapping result of market or user's request；
(6) in the case where the interface of primary and secondary module can realize connection, the secondary module of pre-connection is redesigned or again
Structure；
(7) connection of primary and secondary module is realized, obtains new composite module, and checks the complete of the composite module function and structure
Property；
(8) using new composite module as new primary module, repeat step (6), (7), until completing the redesign of all modules
Or reconstruct, and the connection of all modules is realized, obtain complete public transport chassis product；
(9) integrality of complete public transport chassis product function and structure is detected.
2. the modularization redesign method of public transport chassis according to claim 1, it is characterised in that：It is comprehensive in step (1)
Internal cause and the external cause of product are considered to carry out Module Division, and internal cause refers in the case where the principle of work and power determines its product in itself
Correlation properties, including functional dependency, structural dependence and physical correlation, external cause refer to the change of customer demand, including work(
Can the change of domain scope and strong and weak or size the change of function.
3. the modularization redesign method of public transport chassis according to claim 2, it is characterised in that：In step (1), by public affairs
Frame of telling somebody what one's real intentions are is divided into preceding root module, front overhang framework module, middle root module, rear overhang framework module and rear root module.
4. the modularization redesign method of public transport chassis according to claim 3, it is characterised in that：The preceding root module includes
Upper objective door region, driver area and a few passengers standing area；The front overhang framework module includes both sides hindered phenolic and center
Passage area；The middle root module includes most passenger standing areas and get-off door region；The rear overhang framework module includes two
Side hindered phenolic and central channel region；The bottom of root module is device bearing area after described, and the top of rear root module is more
People hindered phenolic.
5. the modularization redesign method of public transport chassis according to claim 4, it is characterised in that：It is described in step (2)
The characteristic parameter of preceding root module includes leading portion beam overall, leading portion overall length, upper objective gate-width degree, get-off door length, upper objective door riser height
With driver's floor level；The characteristic parameter of the front overhang framework module is wide including front overhang skeleton beam overall, front overhang skeleton overall length, passageway
Degree, front tread, front overhang foot-operated height, length of the bridge floor level and seat level altitude；The characteristic parameter of the middle root module includes
Stage casing beam overall, stage casing overall length, main longitudinal grider spacing, get-off door width, get-off door length, get-off door riser height and double-decker part
Highly；The characteristic parameter of the rear overhang framework module includes back segment beam overall, back segment overall length, main longitudinal grider interval width and more people's seats
Highly.
6. the modularization redesign method of public transport chassis according to claim 1, it is characterised in that：In step (3), according to
The characteristic parameter of module, the structure connection matrix of module is established, the association of modules is calculated according to calculation of relationship degree formula
Degree.
7. the modularization redesign method of public transport chassis according to claim 6, it is characterised in that：Build structure connection matrix
Each row represent characteristic parameter different in same module in M, matrix M, are represented per a line from disparate modules but association be present
Characteristic parameter, the element M in matrix MijThe ith feature parameter of j-th of module is represented, works as MijFor 0 when, represent this module
In the absence of this characteristic parameter, i.e. this feature of this module and other modules is not present relevance, works as MijWhen not being 0, show
There is this characteristic parameter in this module, the two real number value institutes are represented if the i-th row simultaneously has another not for 0 real number value
Relevance be present with regard to this characteristic parameter in corresponding module；
The characteristic parameter of each module and the associated weights grade of other modular character parameters are analyzed successively, will be with a certain characteristic parameter
Other characteristic parameters of associated weights grade identical are put in order in same a line, then derive relating module numerical matrix M '：Work as square
Element M in battle array MijFor 0 and simultaneously i-th row to co-exist in k be not 0 real number value when, represent that j-th of module is special at i-th
The relating module numerical value levied in parameter is k, obtains the relating module numerical matrix M ' of the module by that analogy；
The associated weights grade of each characteristic parameter of certain module is analyzed, establish module relation weighting levels matrix Q, then the module
Structure connection degree α calculation formula is as follows：
<mrow>
<mi>&alpha;</mi>
<mo>=</mo>
<msubsup>
<mi>Q</mi>
<mrow>
<mn>1</mn>
<mo>&times;</mo>
<mi>l</mi>
</mrow>
<mi>T</mi>
</msubsup>
<msub>
<msup>
<mi>M</mi>
<mo>&prime;</mo>
</msup>
<mrow>
<mi>l</mi>
<mo>&times;</mo>
<mn>1</mn>
</mrow>
</msub>
</mrow>
In above formula, l is the number of the modular character parameter.
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