CN115145164A - Engine motion envelope generation method and device, computer equipment and storage medium - Google Patents
Engine motion envelope generation method and device, computer equipment and storage medium Download PDFInfo
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- CN115145164A CN115145164A CN202110333853.7A CN202110333853A CN115145164A CN 115145164 A CN115145164 A CN 115145164A CN 202110333853 A CN202110333853 A CN 202110333853A CN 115145164 A CN115145164 A CN 115145164A
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Abstract
The invention relates to the field of automobile engines, and discloses an engine motion envelope generation method, an engine motion envelope generation device, computer equipment and a storage medium, wherein the method comprises the following steps: acquiring load data of the suspension and torsion-resistant pull rods under a plurality of road conditions and displacement data of the torsion-resistant pull rods; acquiring a rigidity curve of the suspension, and processing the load data and the rigidity curve through a first editing command to generate displacement data of the suspension; and acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the suspended displacement data and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine. The invention can automatically and accurately output the motion envelope of the engine, automatically adjust the position of the suspension, effectively improve the research and development efficiency and accuracy of the whole vehicle, and effectively avoid the problem of interference between the engine and peripheral parts or overlarge space in a real vehicle test.
Description
Technical Field
The invention relates to the field of automobile engines, in particular to an engine motion envelope generation method, an engine motion envelope generation device, computer equipment and a storage medium.
Background
The automobile engine is fixed on the auxiliary frame or the automobile body through the left suspension, the right suspension and the anti-torsion pull rod. The internal structures of the left suspension, the right suspension, and the torsion bar are generally rubber structures for supporting the motion of the engine. There are many parts around the engine, and the engine is complex in movement, and there are different requirements for the spacing between the engine and different parts. When an automobile engine is designed, a static spacing is reserved according to an empirical value, and the situation that the engine interferes with peripheral parts or the reserved spacing is too large easily occurs. Although the rationality of the spacing can also be verified by multiple rounds of real-time testing, this approach incurs additional testing costs and takes a long time.
Therefore, a method for generating the motion envelope of the engine is needed to set the reserved space between the engine and the peripheral parts.
Disclosure of Invention
Therefore, in order to solve the above technical problem, it is necessary to provide an engine motion envelope generating method, apparatus, computer device and storage medium, so as to solve the problem of position design of peripheral components of the engine, and effectively adjust the distance between the engine and the peripheral components on the premise that the engine and the peripheral components do not interfere with each other.
An engine motion envelope generation method comprising:
acquiring load data of a suspension and an anti-torsion pull rod under a plurality of road conditions and displacement data of the anti-torsion pull rod;
acquiring a stiffness curve of the suspension, and processing the load data and the stiffness curve through a first editing command to generate displacement data of the suspension;
and acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the displacement data of the suspension and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine.
An engine motion envelope generating device comprising:
the data acquisition module is used for acquiring load data of the suspension and the torsion-resistant pull rod under a plurality of road conditions and displacement data of the torsion-resistant pull rod;
a suspension displacement generation module, configured to obtain a stiffness curve of the suspension, process the load data and the stiffness curve through a first editing command, and generate displacement data of the suspension;
and the output motion envelope module is used for acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the suspended displacement data and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine.
A computer apparatus comprising a memory, a processor and computer readable instructions stored in the memory and executable on the processor, the processor when executing the computer readable instructions implementing the engine motion envelope generation method described above.
One or more readable storage media storing computer readable instructions which, when executed by one or more processors, cause the one or more processors to perform the engine motion envelope generation method as described above.
According to the engine motion envelope generation method, the engine motion envelope generation device, the computer equipment and the storage medium, the vibration characteristics of the engine under a plurality of road conditions are comprehensively evaluated by acquiring the load data of the suspension and the torsion-resistant pull rod under the plurality of road conditions and the displacement data of the torsion-resistant pull rod. And acquiring a stiffness curve of the suspension, processing the load data and the stiffness curve through a first editing command to generate displacement data of the suspension, and indirectly calculating the displacement data of the suspension through the load data and the stiffness curve. And acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the displacement data of the suspension and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine, wherein the acquired motion envelope of the engine is the motion envelope generated when the positions of peripheral parts are not considered, and can be used for evaluating the rationality of the current suspension setting position. The invention can automatically and accurately output the motion envelope of the engine, automatically adjust the position of the suspension, effectively improve the research and development efficiency and accuracy of the whole vehicle, and effectively avoid the problem of interference between the engine and peripheral parts or overlarge space in a real vehicle test.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of an application environment of a method for generating an engine motion envelope according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for generating an engine motion envelope according to an embodiment of the present invention;
FIG. 3 is a schematic view of the installation of a sensor and a sensor holder according to an embodiment of the invention;
FIG. 4 is a graph of stiffness of a suspension in the X direction in an embodiment of the present invention;
FIG. 5 is a schematic view of an adjustable stand 50 according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an engine motion envelope generating apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The engine motion envelope generation method provided by the embodiment can be applied to the application environment shown in fig. 1, in which a client communicates with a server. The client includes, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices. The server can be implemented by an independent server or a server cluster composed of a plurality of servers.
In one embodiment, as shown in fig. 2, a method for generating an engine motion envelope is provided, which is described by taking the method as an example applied to the server side in fig. 1, and includes the following steps:
s10, acquiring load data of the suspension and the torsion-resistant pull rod under a plurality of road conditions and displacement data of the torsion-resistant pull rod.
Understandably, suspensions are automotive components used to reduce and control the transmission of engine vibrations, and to provide support. The torsion resistant tie rods are typically arranged below the engine, with one end of the tie rods connected to the engine and the other end connected to the subframe. By measuring load data of the suspension and the torsion-resistant pull rod and displacement data of the torsion-resistant pull rod, vibration characteristics of the engine can be analyzed, and a motion envelope is formed. Specifically, the load data of the suspension and the torsion resistant tie rod includes the load data of the suspension and the load data of the torsion resistant tie rod.
Load data of the suspension and the torsion-resistant pull rod under a plurality of road conditions and displacement data of the torsion-resistant pull rod can be obtained through a real vehicle test. Herein, the road conditions include, but are not limited to, a uniform crossing of a bump, a uniform pit, a uniform crossing of a belgium road, a uniform crossing of a twisted road, a belgium road emergency brake, an accelerated road condition, and an emergency brake road condition. Load data of the suspension and torsion resistant tie rods, as well as displacement data of the torsion resistant tie rods, can be obtained by corresponding sensor measurements. For example, the load data of the suspension and the load data of the torsion beam can be obtained by measuring with a triaxial force sensor. In one example, the span of the triaxial force sensor is 20KN, the voltage range: 0 to 12V. The displacement data of the torsion resistant pull rod can be obtained by measuring through a displacement sensor. In one example, the displacement sensor is a slider type displacement sensor, the effective stroke of the displacement sensor is 50mm to 90mm, and the resistance value is as follows: 5k omega, the voltage range is 0-12V, and the displacement data of the torsion-resistant pull rod in the X direction, the Y direction and the Z direction can be collected.
In one example, as shown in fig. 3, fig. 3 is a schematic view of a sensor and sensor bracket mounting for acquiring load data and displacement data. In fig. 3, an engine 08 is mounted on a subframe 03 via a left suspension 01 and a right suspension 02, a three-axis force sensor 07 is provided near the left suspension 01 for measuring a load force of the left suspension (another three-axis force sensor for measuring a load force of the right suspension 02 is not shown), a torsion bar 04 is provided below the engine 08, and a displacement sensor 06 is screwed to a front end position of the torsion bar 04 via an adjustable bracket 05.
And S20, acquiring a stiffness curve of the suspension, and processing the load data and the stiffness curve through a first editing command to generate displacement data of the suspension.
Understandably, the stiffness curve of the suspension can be obtained by measuring the displacement data and the load data of the suspension and fitting. In one example, FIG. 4 is a graph of stiffness of a suspension in the X direction in one example. The abscissa of the stiffness curve is displacement and the ordinate is force.
The first editing command may refer to an ADAMS (Automatic Dynamic Analysis of Mechanical Systems) command. The first editing command can compile the load data and the stiffness curve to generate a command prompt file (cmd file), then perform a load operation on ADAMS (a virtual prototype analysis software), and finally output suspended displacement data. Here, the displacement data of the suspension includes the displacement amount of the left suspension and the displacement amount of the right suspension.
And S30, acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the displacement data of the suspension and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine.
Understandably, the second editing command may be a CATIA compiling command. CATIA (Computer Aided three-Dimensional Interface Application) is modeling software for industrial design. The powertrain model refers to a digital model based on the structural configuration of the engine. The DMU (Digital mock-up) refers to a virtual mock-up model calculated in modeling software based on the position relationship and stress condition of parts.
Namely, the displacement data of the torsion-resistant pull rod, the displacement data of the suspension and a second editing command are imported into a power assembly model in CATIA software, DMU operation is carried out, and the motion envelope of the engine is generated. The motion envelope of the engine may be used as a design input for surrounding components of the engine.
In the steps S10-S30, load data of the suspension and the torsion-resistant pull rod under a plurality of road conditions and displacement data of the torsion-resistant pull rod are obtained so as to comprehensively evaluate the vibration characteristics of the engine under the plurality of road conditions. And acquiring a stiffness curve of the suspension, processing the load data and the stiffness curve through a first editing command to generate displacement data of the suspension, and indirectly calculating the displacement data of the suspension through the load data and the stiffness curve. And acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the displacement data of the suspension and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine, wherein the acquired motion envelope of the engine is the motion envelope generated when the positions of peripheral parts are not considered, and can be used for evaluating the rationality of the current suspension setting position.
Optionally, after step S30, that is, after the obtaining a second editing command, inputting the displacement data of the torsion bar, the displacement data of the suspension, and the second editing command into a powertrain model to perform DMU operation, and outputting a motion envelope of the engine, the method further includes:
s40, obtaining position data of the part to be evaluated, and calculating distance data between the part and the motion envelope according to the motion envelope and the position data.
Understandably, the number of parts to be evaluated may be one or more. The position data may refer to coordinate information of the part in the three-dimensional model. The spacing data between the part and the motion envelope refers to the minimum distance between the part and the motion envelope.
And S50, if the difference value between the distance data and the target distance is smaller than zero, acquiring a suspension stiffness curve set and a target distance set.
The target spacing refers to the minimum spacing allowed between the motion envelope and the component. The target spacing can be set according to actual needs. The target pitches of different parts may be the same or different. If the difference between the distance data and the target distance is smaller than zero, it is indicated that the distance between the engine and the part is too small, and the position of the mount needs to be adjusted. If the difference between the distance data and the target distance is greater than or equal to zero, which indicates that the current distance between the engine and the component is satisfactory, the motion envelope of the engine generated in step S30 is available and does not need to be revised.
The suspension stiffness curve set refers to a set of several stiffness curves of the suspension corresponding to the current engine. The set of target spacings includes an engine motion envelope and a target spacing for each component part of the perimeter correlation. Here, the component refers to a chassis, a vehicle body (or a sub-frame), or the like disposed in the periphery of the engine.
And S60, processing the suspension stiffness curve set and the target interval set through a preset neural network algorithm to generate a fitting curve of the suspension.
Here, the preset neural network algorithm may employ a BP (Back Propagation) neural network algorithm. The topology of the BP neural network algorithm includes an input layer (input), a hide layer (hide layer), and an output layer (output layer).
When the preset neural network algorithm processes the suspension stiffness curve set and the target distance set, a training mode of cycle alternation can be adopted. In one example, the number of hidden layers of the neural network algorithm is preset to be 10, 1 is output (representing that 1 result is output), the maximum training time is 1000, and the training requirement precision is 1*e -3 (watch)The deviation value between the output result and the target clearance is not more than 1*e -3 ) The learning rate was 0.01 (indicating 100 cycles of accumulation in 1 second of data). In the training process, the preset neural network algorithm can properly adjust parameters (hidden layer number, training times, learning rate and the like) of the BP neural network according to input and output original data of each stiffness curve, calculate a fitting function formula after calculation, and calculate a correction result according to the distance between each stiffness curve and a part.
The fitting curve is the difference curve. If a point with a negative ordinate value exists in the fitting curve, the distance between the engine and the part is too small.
And S70, determining the fitted curve with the ordinate values being non-negative values as a correction curve.
If points with the vertical coordinate values being negative values exist in the fitting curve, the training is required to be continued until the vertical coordinate values of all the points in the fitting curve are non-negative values. Non-negative values are positive values or zero. A fitted curve in which the ordinate values are all non-negative values may be determined as the correction curve.
And S80, generating a corrected motion envelope of the engine according to the correction curve.
Understandably, after obtaining the correction curve, the corrected motion envelope of the engine can be calculated according to the methods of steps S20 and S30. Here, the stiffness curve of the suspension in step S20 may be replaced with the above-described correction curve.
Optionally, after step S40, that is, after the obtaining of the position data of the component to be evaluated and calculating the distance data between the component and the motion envelope according to the motion envelope and the position data, the method further includes:
s51, if the difference value between the distance data and the target distance is larger than or equal to zero, determining that the motion envelope is available.
Understandably, if the difference between the distance data and the target distance is greater than or equal to zero, which indicates that the current distance between the engine and the component is satisfactory, the motion envelope of the engine generated in step S30 is available and does not need to be revised again.
Optionally, after step S80, that is, after generating the modified motion envelope of the engine according to the modified curve, the method further includes:
and S90, if the difference value between the corrected interval data calculated based on the corrected motion envelope and the target interval is greater than or equal to zero, determining that the corrected motion envelope is available.
Understandably, after obtaining the modified motion envelope, the modified interval data can be calculated according to the method of step S40. If the difference between the corrected interval data and the target interval is greater than or equal to zero, which indicates that the current interval between the engine and the component is satisfactory, the corrected motion envelope of the engine generated in step S80 is available and does not need to be corrected again. If the difference between the corrected interval data and the target interval is less than zero, which indicates that the current interval between the engine and the component is not satisfactory, the corrected motion envelope of the engine generated in step S80 is not usable. At this point, a new modified motion envelope is calculated according to the method of steps S40-S80, and the verification of the availability of the new modified motion envelope is continued according to the method provided in step S90 until an available modified motion envelope is obtained.
Optionally, in step S90, after determining that the modified motion envelope is available if the difference between the modified interval data calculated based on the modified motion envelope and the target interval is greater than or equal to zero, the method further includes:
and S91, calculating position adjustment information of the suspension according to the correction curve so as to adjust the position of the suspension through the position adjustment information.
Understandably, the correction position of the suspension corresponding to the correction curve can be obtained, and the position adjustment information of the suspension is calculated according to the correction position of the suspension and the current position of the suspension. The position adjustment information is the difference between the corrected position of the suspension and the current position of the suspension. And then adjusting the position of the suspension according to the position adjustment information. Because the position that the suspension is used for supporting the engine changes, the position of suspension changes, and the position of engine also changes along with changing, can guarantee that the interval between engine and the spare part meets the demands like this.
Optionally, step S10, namely, the acquiring load data of the suspension and the torsion-resistant tie bar under a plurality of road conditions and the displacement data of the torsion-resistant tie bar includes:
s101, three-dimensional load force data of the suspension and the torsion-resistant pull rod under a plurality of road conditions are obtained through a three-axis force sensor;
and S102, extracting the maximum load value of each road condition from the three-dimensional load force data to generate the load data.
Understandably, the triaxial force sensor can measure three-dimensional load force data of the suspension and torsion bar. The three-dimensional load force data comprises three-dimensional load forces, namely an X-direction load force, a Y-direction load force and a Z-direction load force.
The three-dimensional loading force data of each road condition comprises three-dimensional loading forces at all times. The maximum load value (i.e., the maximum load force) of each road condition can be extracted from the three-dimensional load force data to generate load data. In one example, the load data may be represented as a table of maximum values for each road condition load.
Optionally, the displacement data is obtained through a displacement sensor;
the displacement sensor is in threaded connection with the front end position of the torsion-resistant pull rod through an X-direction sliding groove or a Y-direction sliding groove of the adjustable bracket; the adjustable bracket is provided with a plurality of X-direction sliding chutes and a plurality of Y-direction sliding chutes;
the X-direction sliding groove and/or the Y-direction sliding groove are used for adjusting the position of the adjustable support on the auxiliary frame or the vehicle body structure.
Understandably, as shown in fig. 5, fig. 5 is a schematic structural view of an exemplary adjustable bracket 50. The adjustable bracket 50 is provided with a plurality of X-direction sliding grooves and a plurality of Y-direction sliding grooves, such as X-direction sliding grooves 052 and 054, and Y- direction sliding grooves 051 and 053. In one example, the displacement sensor is screwed to a front end position (an end toward the vehicle head) of the torsion bar through an X-direction slide groove 052. Thus, the adjustable bracket 50 accommodates displacement sensors of different ranges. The X-direction sliding groove 054 and the Y- direction sliding grooves 051 and 053 can be screwed on the auxiliary frame or the vehicle body structure. The X-direction sliding grooves 054 can be adjusted in the X direction, and the Y- direction sliding grooves 051 and 053 can be adjusted in the Y direction, so that the adjustable bracket 50 can be adapted to be assembled on different auxiliary frames or vehicle body structures, and the length and the width can be adjusted according to different auxiliary frames or vehicle body structures. Meanwhile, in the height direction, the position of the displacement sensor can be adjusted by increasing or decreasing the gaskets on the fixing bolts, so that adjustable assembly of different vehicle types and different engines is realized.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In one embodiment, an engine motion envelope generating device is provided, and the engine motion envelope generating device corresponds to the engine motion envelope generating method in the above embodiment one to one. As shown in fig. 6, the engine motion envelope generating apparatus includes a measuring module 10, a generating suspension displacement module, and an output motion envelope module 30. The functional modules are explained in detail as follows:
the data acquisition module 10 is used for acquiring load data of the suspension and torsion-resistant pull rods under a plurality of road conditions and displacement data of the torsion-resistant pull rods;
a suspension displacement generation module 20, configured to obtain a stiffness curve of the suspension, process the load data and the stiffness curve through a first editing command, and generate displacement data of the suspension;
and the output motion envelope module 30 is configured to obtain a second editing command, input the displacement data of the torsion-resistant pull rod, the suspended displacement data, and the second editing command into a powertrain model to perform DMU operation, and output a motion envelope of the engine.
Optionally, the engine motion envelope generating device further comprises:
the calculation interval module is used for acquiring position data of the part to be evaluated and calculating interval data between the part and the motion envelope according to the motion envelope and the position data;
the acquisition set module is used for acquiring a suspension stiffness curve set and a target interval set if the difference value between the interval data and the target interval is smaller than zero;
the fitting curve module is used for processing the suspension stiffness curve set and the target interval set through a preset neural network algorithm to generate a fitting curve of the suspension;
the correction curve determining module is used for determining the fitted curve of which the longitudinal coordinate values are all non-negative values as a correction curve;
and the generation modified motion envelope module is used for generating a modified motion envelope of the engine according to the modified curve.
Optionally, the engine motion envelope generating device further comprises:
a first envelope availability determination module to determine that the motion envelope is available if a difference between the pitch data and the target pitch is greater than or equal to zero.
Optionally, the engine motion envelope generating device further comprises:
a second envelope availability determination module to determine that the modified motion envelope is available if a difference between modified pitch data calculated based on the modified motion envelope and the target pitch is greater than or equal to zero.
Optionally, the engine motion envelope generating device further comprises:
and the position adjusting information generating module is used for calculating the position adjusting information of the suspension according to the correction curve so as to adjust the position of the suspension through the position adjusting information.
Optionally, the data obtaining module 10 includes:
the three-dimensional load force data acquisition unit is used for acquiring three-dimensional load force data of the suspension and the torsion resistant pull rod under a plurality of road conditions through a three-axis force sensor;
and the load data generating unit is used for extracting the maximum load value of each road condition from the three-dimensional load force data and generating the load data.
Optionally, the displacement data is obtained by a displacement sensor;
the displacement sensor is in threaded connection with the front end position of the torsion-resistant pull rod through an X-direction sliding groove or a Y-direction sliding groove of the adjustable support; the adjustable bracket is provided with a plurality of X-direction sliding grooves and a plurality of Y-direction sliding grooves;
the X-direction sliding groove and/or the Y-direction sliding groove are used for adjusting the position of the adjustable support on the auxiliary frame or the vehicle body structure.
For specific definition of the engine motion envelope generating device, reference may be made to the above definition of the engine motion envelope generating method, which is not described herein again. The various modules in the engine motion envelope generating device described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a readable storage medium and an internal memory. The readable storage medium stores an operating system, computer readable instructions, and a database. The internal memory provides an environment for the operating system and execution of computer-readable instructions in the readable storage medium. The database of the computer device is used for storing data related to the engine motion envelope generation method. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer readable instructions, when executed by a processor, implement a method of engine motion envelope generation. The readable storage media provided by the present embodiments include non-volatile readable storage media and volatile readable storage media.
In one embodiment, a computer device is provided, comprising a memory, a processor, and computer readable instructions stored on the memory and executable on the processor, the processor when executing the computer readable instructions implementing the steps of:
acquiring load data of a suspension and an anti-torsion pull rod under a plurality of road conditions and displacement data of the anti-torsion pull rod;
acquiring a stiffness curve of the suspension, and processing the load data and the stiffness curve through a first editing command to generate displacement data of the suspension;
and acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the suspended displacement data and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine.
In one embodiment, one or more computer-readable storage media storing computer-readable instructions are provided, the readable storage media provided by the embodiments including non-volatile readable storage media and volatile readable storage media. The readable storage medium has stored thereon computer readable instructions which, when executed by one or more processors, perform the steps of:
acquiring load data of a suspension and an anti-torsion pull rod under a plurality of road conditions and displacement data of the anti-torsion pull rod;
acquiring a stiffness curve of the suspension, and processing the load data and the stiffness curve through a first editing command to generate displacement data of the suspension;
and acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the suspended displacement data and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine.
It will be understood by those of ordinary skill in the art that all or part of the processes of the methods of the above embodiments may be implemented by hardware related to computer readable instructions, which may be stored in a non-volatile readable storage medium or a volatile readable storage medium, and when executed, the computer readable instructions may include processes of the above embodiments of the methods. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A method of generating an engine motion envelope, comprising:
acquiring load data of a suspension and an anti-torsion pull rod under a plurality of road conditions and displacement data of the anti-torsion pull rod;
acquiring a stiffness curve of the suspension, and processing the load data and the stiffness curve through a first editing command to generate displacement data of the suspension;
and acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the displacement data of the suspension and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine.
2. The engine motion envelope generation method of claim 1, wherein said obtaining a second edit command, inputting the displacement data of the torsion bar, the displacement data of the mount, and the second edit command into a powertrain model for DMU operation, and outputting the motion envelope of the engine further comprises:
acquiring position data of a part to be evaluated, and calculating distance data between the part and the motion envelope according to the motion envelope and the position data;
if the difference value between the distance data and the target distance is smaller than zero, acquiring a suspension stiffness curve set and a target distance set;
processing the suspension stiffness curve set and the target interval set through a preset neural network algorithm to generate a fitting curve of the suspension;
determining the fitted curve with the ordinate values being non-negative values as a correction curve;
and generating a modified motion envelope of the engine according to the modified curve.
3. The engine motion envelope generation method of claim 2, wherein after acquiring position data of the component to be evaluated and calculating spacing data between the component and the motion envelope based on the motion envelope and the position data, further comprising:
determining that the motion envelope is available if a difference between the range data and the target range is greater than or equal to zero.
4. The engine motion envelope generation method of claim 2, further comprising, after generating the modified motion envelope of the engine according to the modification curve:
determining that the modified motion envelope is available if a difference between modified pitch data calculated based on the modified motion envelope and the target pitch is greater than or equal to zero.
5. The engine motion envelope generation method of claim 4, wherein after determining that the modified motion envelope is available if the difference between modified pitch data calculated based on the modified motion envelope and the target pitch is greater than or equal to zero, further comprising:
and calculating position adjustment information of the suspension according to the correction curve so as to adjust the position of the suspension through the position adjustment information.
6. The engine motion envelope generation method of claim 1, wherein said obtaining load data for suspension and torsion bar under a plurality of road conditions, and displacement data for the torsion bar comprises:
acquiring three-dimensional load force data of the suspension and the torsion-resistant pull rod under a plurality of road conditions through a triaxial force sensor;
and extracting the maximum load value of each road condition from the three-dimensional load force data to generate the load data.
7. The engine motion envelope generation method of claim 1, wherein the displacement data is acquired by a displacement sensor;
the displacement sensor is in threaded connection with the front end position of the torsion-resistant pull rod through an X-direction sliding groove or a Y-direction sliding groove of the adjustable support; the adjustable bracket is provided with a plurality of X-direction sliding chutes and a plurality of Y-direction sliding chutes;
the X-direction sliding groove and/or the Y-direction sliding groove are used for adjusting the position of the adjustable support on the auxiliary frame or the vehicle body structure.
8. An engine motion envelope generation apparatus, comprising:
the data acquisition module is used for acquiring load data of the suspension and the torsion-resistant pull rod under a plurality of road conditions and displacement data of the torsion-resistant pull rod;
the suspension displacement generation module is used for acquiring a stiffness curve of the suspension, processing the load data and the stiffness curve through a first editing command and generating displacement data of the suspension;
and the output motion envelope module is used for acquiring a second editing command, inputting the displacement data of the torsion-resistant pull rod, the suspended displacement data and the second editing command into a power assembly model to perform DMU operation, and outputting the motion envelope of the engine.
9. A computer apparatus comprising a memory, a processor and computer readable instructions stored in the memory and executable on the processor, wherein the processor when executing the computer readable instructions implements the engine motion envelope generation method of any one of claims 1 to 7.
10. One or more readable storage media storing computer readable instructions which, when executed by one or more processors, cause the one or more processors to perform the engine motion envelope generation method of any one of claims 1 to 7.
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