CN114906234B - Dynamic vibration absorbing system matching method, dynamic vibration absorbing system and automobile - Google Patents
Dynamic vibration absorbing system matching method, dynamic vibration absorbing system and automobile Download PDFInfo
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- CN114906234B CN114906234B CN202210606206.3A CN202210606206A CN114906234B CN 114906234 B CN114906234 B CN 114906234B CN 202210606206 A CN202210606206 A CN 202210606206A CN 114906234 B CN114906234 B CN 114906234B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/06—Drivers' cabs
- B62D33/0604—Cabs insulated against vibrations or noise, e.g. with elastic suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D43/00—Spare wheel stowing, holding, or mounting arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The application provides a dynamic vibration absorbing system matching method, a dynamic vibration absorbing system and an automobile, wherein the dynamic vibration absorbing system comprises a spare tire assembly and an elastic element, the spare tire assembly is arranged near a rear suspension of the automobile through the elastic element, and the method comprises the following steps: acquiring the natural frequency of the pitching rigid body mode of the automobile cab; acquiring the automobile mass and the spare tire assembly mass; and determining the first rigidity and the first damping ratio of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab, the automobile mass and the spare tire mass. By calculating parameters of the elastic element matched with the actual condition of the automobile, the optimal elastic element and the automobile spare tire are selected to form the dynamic vibration absorbing system together, and vibration of a frame near the rear suspension system under the pitching resonance speed of the cab is absorbed, so that pitching vibration of the cab of the automobile is reduced more accurately, and comfort of drivers and passengers is improved.
Description
Technical Field
The invention belongs to the field of automobiles, and particularly relates to a dynamic vibration absorbing system matching method, a dynamic vibration absorbing system and an automobile.
Background
During running, the truck is excited by the pitching mode of the cab due to the radial jump, dynamic balance and road excitation of the rear wheel tire assembly, and resonance is generated, so that the comfort of the whole truck is affected. The prior art reduces rear wheel vibration typically through the rear suspension system and the cab suspension system, but the cab pitching natural frequency is typically between 5Hz and 8Hz, and the frequency range is basically in the vibration amplifying region of the rear suspension system and the cab suspension system. If the vibration isolation area of the rear suspension system is adjusted to be below 5Hz, the bearing performance of the automobile is reduced, and the vibration isolation area of the cab suspension system is adjusted to be below 5Hz, the cab suspension system needs to be changed greatly, and the total arrangement difficulty and the cost are increased.
Therefore, how to accurately reduce the pitching vibration of the automobile cab is a technical problem to be solved.
Disclosure of Invention
In order to solve the technical problem of how to accurately reduce pitching vibration of an automobile cab, which is described in the background art, the application provides a matching method of a dynamic vibration absorbing system, the dynamic vibration absorbing system and an automobile.
According to a first aspect, an embodiment of the present application provides a matching method of a dynamic vibration absorbing system, where the dynamic vibration absorbing system includes a spare tire assembly and an elastic element, the spare tire assembly is disposed near a rear suspension of an automobile through the elastic element, and the method includes: acquiring the natural frequency of the pitching rigid body mode of the automobile cab; acquiring the automobile mass and the spare tire assembly mass; and determining the first rigidity and the first damping ratio of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab, the automobile mass and the spare tire assembly mass.
Further, the determining the first stiffness and first damping ratio of the shock absorber system based on the car cab pitch rigid body mode natural frequency, the car mass, and the spare tire assembly mass comprises: determining a first stiffness of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab and the mass of the spare tire assembly; a first damping ratio of the elastic element is determined based on the spare tire assembly mass and the vehicle mass.
Further, the method further comprises: carrying out loading mode testing on the elastic element with the first rigidity and the first damping ratio; calculating a second stiffness and a second damping ratio of the elastic element under modal testing; comparing the first rigidity and the first damping ratio with the second rigidity and the second damping ratio, and determining the value range of the first rigidity and the first damping ratio.
Further, after the determining the range of values of the first stiffness and the first damping ratio, the method includes: testing the first rigidity and the first damping ratio in the value range at a preset vehicle speed; acquiring first vibration information in a test; and selecting an optimal value in the value range based on the first vibration information.
Further, the method further comprises: determining a preset vehicle speed range of the preset vehicle speed based on the preset vehicle speed; testing the first rigidity and the first damping ratio in the value range with a preset vehicle speed range; acquiring second vibration information at different vehicle speeds; and selecting an optimal value in the value range based on the second vibration information.
Further, the automobile mass includes: the mass of the whole automobile except the dynamic vibration absorbing system when the automobile is in idle load and the mass of the whole automobile except the dynamic vibration absorbing system when the automobile is in half load.
Further, the determining the elastic element damping ratio based on the spare tire mass and the vehicle mass includes: determining a second damping ratio based on the mass of the whole automobile except the dynamic vibration absorbing system and the mass of the spare tire when the automobile is in idle load; determining a third damping ratio based on the mass of the whole automobile except the dynamic vibration absorbing system and the mass of the spare tire during half-load of the automobile; an optimal damping ratio is determined based on the second damping ratio and the third damping ratio.
According to another aspect of an embodiment of the present application, there is provided a dynamic vibration absorbing system control apparatus including: the first acquisition module is used for acquiring the natural frequency of the pitching rigid body mode of the automobile cab; the second acquisition module is used for acquiring the automobile mass and the spare tire mass; and the determining module is used for determining the rigidity and damping ratio of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab, the automobile mass and the spare tire mass.
According to another aspect of the embodiment of the application, a dynamic vibration absorber system is provided, the dynamic vibration absorber system comprises a spare tire of an automobile and an elastic element, the spare tire is arranged near a rear suspension of the automobile through the elastic element, and parameters of the elastic element are determined through the matching method of the dynamic vibration absorber system.
According to another aspect of embodiments of the present application, there is provided an automobile including the aftertreatment system described above.
In the embodiment of the application, the parameters of the elastic element under the actual condition of the automobile are calculated and matched, the adjustment test is carried out, the optimal elastic element and the automobile spare tire are selected to form the dynamic vibration absorbing system together, the vibration absorber system is arranged near the rear suspension of the truck, the vibration of the frame near the rear suspension system under the pitching resonance speed of the cab is absorbed, the optimal vibration absorber system is matched and corresponding to the actual condition of the automobile, the pitching vibration of the cab is reduced better, and the comfort of drivers and passengers is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of an alternative hardware environment according to an embodiment of the invention;
FIG. 2 is an alternative flow diagram according to an embodiment of the present application;
FIG. 3 is a schematic flow chart of another alternative according to an embodiment of the present application;
FIG. 4 is a schematic flow chart of another alternative according to an embodiment of the present application;
FIG. 5 is a block diagram of an alternative control device according to an embodiment of the present application;
fig. 6 is a block diagram of an alternative electronic device according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to one aspect of the embodiments of the present application, a dynamic vibration absorber system matching method is provided. Alternatively, in the present embodiment, the above method may be applied to a hardware environment constituted by the terminal 102 and the server 104 as shown in fig. 1. As shown in fig. 1, the server 104 is connected to the terminal 102 through a network, which may be used to provide services to the terminal or a client installed on the terminal, may set a database on the server or independent of the server, may be used to provide data storage services to the server 104, and may also be used to process cloud services, where the network includes, but is not limited to: the terminal 102 is not limited to a PC, a mobile phone, a tablet computer, a car-mounted computer, etc., but is a wide area network, a metropolitan area network, or a local area network. The method of the embodiment of the present application may be performed by the server 104, may be performed by the terminal 102, or may be performed by both the server 104 and the terminal 102. The control method performed by the terminal 102 according to the embodiment of the present application may be performed by a client installed thereon.
As mentioned in the background, the prior art reduces rear wheel vibrations typically through the rear suspension system, the cab suspension system, but the cab pitch natural frequency is typically between 5Hz and 8Hz, which frequency range is substantially in the vibration amplifying region of the rear suspension system, the cab suspension system. If the vibration isolation area of the rear suspension system is adjusted to be below 5Hz, the bearing performance of the automobile is reduced, and the vibration isolation area of the cab suspension system is adjusted to be below 5Hz, the cab suspension system needs to be changed greatly, and the total arrangement difficulty and the cost are increased. The dynamic vibration absorber has better vibration reduction effect on 5 Hz-8 Hz vibration. A dynamic vibration absorber is a device that absorbs vibration energy of an object using a resonance system to reduce vibration of the object. The basic principle of the dynamic vibration absorber is to add a mass spring resonance system to the vibrating object, and the reaction force generated by the additional mass spring resonance system during resonance can reduce the vibration of the vibrating object. The system consisting of the vibrating mass and the mass-spring resonance system can be regarded as consisting of a spring damping main system (i.e. vibrating mass) and an additional spring system (mass-spring resonance system). The additional spring system produces a vibration 180 deg. out of phase with the spring dampening main system, thereby counteracting the vibration of the spring dampening main system at a certain frequency. Therefore, a spring system can be added in the spare tire installation fixing device of the automobile, the spare tire is modified into the dynamic vibration absorber, so that the vibration of a frame at the rear wheel is reduced, the pitching resonance of a cab is avoided, but the vibration reduction effect of the dynamic vibration absorber which is installed in advance is different under different automobiles and different states, such as half-load and no-load conditions, and the purpose of reducing the vibration of the cab cannot be achieved. Based on this inventor, taking the power vibration absorbing system matching method in the embodiment performed by the terminal 102 and/or the server 104 as an example, fig. 2 is a schematic flow chart of a power vibration absorbing system matching method according to an embodiment of the present application, as shown in fig. 2, the flow chart of the method may include the following steps:
s202, acquiring the natural frequency of the pitching rigid body mode of the automobile cab.
And S204, acquiring the automobile mass and the spare tire assembly mass.
S206, determining the first rigidity and the first damping ratio of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab, the automobile mass and the spare tire mass.
Through the steps S202 to S206, parameters of the elastic element under the actual condition of the automobile are calculated and matched, an adjustment test is carried out, an optimal elastic element and an automobile spare tire are selected to form a dynamic vibration absorbing system together, the vibration absorber system is arranged near a rear suspension of the truck, vibration of a frame near the rear suspension system under the pitching resonance speed of a cab is absorbed, the corresponding optimal vibration absorber system is matched based on the actual condition of the automobile, pitching vibration of the cab of the automobile is reduced better, and comfort of drivers and passengers is improved.
For the solution in step S202, the natural frequency is that when the object vibrates freely, its displacement changes with time according to sine or cosine law, and the frequency of vibration is independent of the initial condition, but only related to the natural characteristics of the system (such as mass, shape, material, etc.). The natural frequency of the pitching rigid body mode of the cab can be measured by adopting a hammering mode test, and the natural frequency of the pitching rigid body mode of the cab is finally determined by carrying out a cab working mode test. The acquired natural frequency can determine the actual vibration condition of the automobile, and vibration reduction can be accurately carried out.
For the technical scheme in step S204, the mass of the spare tire assembly, that is, the total mass of the dynamic vibration absorber system, the vehicle vibration condition can be accurately obtained according to the total mass of the vibration absorber system and the vehicle mass, and the vehicle vibration to be eliminated is determined.
For the technical scheme in step S206, the actual vibration condition of the automobile is synthesized, the stiffness and the damping ratio of the elastic element are calculated and used as the first stiffness and the first damping ratio, so that the required parameters of the elastic element can be obtained, the automobile can be matched for accurate vibration reduction, the pitching vibration of the cab of the automobile can be reduced better, and the comfort of drivers and passengers can be improved. Illustratively, calculating elastic element parameters from an auto-cab pitch rigid body mode natural frequency, an auto-mass, and a spare tire mass utilization formula, determining the absorber system first stiffness and first damping ratio based on the auto-cab pitch rigid body mode natural frequency, the auto-mass, and the spare tire mass comprises: determining a first stiffness of the elastic element based on the natural frequency of the rigid body mode of pitching of the automobile cab and the spare tire mass; a first damping ratio of the elastic element is determined based on the spare tire mass and the vehicle mass.
After the theoretical value is calculated, because the elastic element has about ten percent of vibration error in the actual production process, the vibration error is difficult to avoid, and therefore, the whole dynamic vibration absorption system needs to be further optimized and selected so as to achieve more accurate automobile vibration absorption. Illustratively, referring to FIG. 3, the dynamic vibration absorber system matching method further comprises the steps of:
s302, carrying out loading mode testing on the elastic element with the first rigidity and the first damping ratio.
S304, calculating second rigidity and second damping ratio of the elastic element under the modal test.
S306, comparing the first rigidity and the first damping ratio with the second rigidity and the second damping ratio, and determining the value range of the first rigidity and the first damping ratio.
For the technical scheme in step S302, loading mode test is performed on the elastic element parameters calculated by theory, the mode test obtains response signals by measuring a given excited system, and then the mode parameters of the system are obtained by applying a mode parameter identification method.
For the technical scheme in step S304, the calculated stiffness and damping ratio is taken as a given amount of the modal test, the modal parameter is obtained, and the obtained stiffness and damping ratio is taken as a second stiffness and second damping ratio.
For the technical scheme in step S306, the error value between the elastic element parameter after the modal test and the calculated elastic element parameter is the error value in the actual working, and the value range of the elastic element parameter due can be determined by comparing the parameters, so that the dynamic vibration absorbing system can more accurately absorb vibration corresponding to the actual condition of the automobile.
As a more specific embodiment, to match different actual conditions of the automobile, such as different vibration information under high speed and low speed conditions, after performing a modal test of the elastic element parameters, a selection range of the elastic element parameters is obtained, and the elastic element parameters that are optimal under a preset speed can be tested by means of a preset speed, where an exemplary method includes: testing the first rigidity and the first damping ratio in the value range at a preset vehicle speed; acquiring first vibration information in a test; and selecting an optimal value in the value range based on the first vibration information. And selecting an optimal value in the parameter range of the elastic element according to the vibration condition of the vehicle under the preset vehicle speed as first vibration information so as to achieve an optimal vibration reduction effect, accurately reduce vibration and improve driving comfort.
As a further embodiment, the frequency of resonance generated by pitching of the cab may be different based on the difference of the vehicle speeds under the same road surface condition during the driving process, and in order to accurately achieve the vibration reduction effect, the matching parameters of the elastic element may be further optimized according to the difference of the vehicle speeds, and an optimal vibration reduction scheme may be selected, and the method includes: determining a preset vehicle speed range based on the preset vehicle speed; testing the first rigidity and the first damping ratio in the value range with a preset vehicle speed range; acquiring second vibration information at different vehicle speeds; and selecting an optimal value in the value range based on the second vibration information. And selecting a preset vehicle speed range based on the preset vehicle speed to adapt to the change of the vehicle speed in the driving process, taking the vibration information in the preset vehicle speed range as second vibration information, and optimizing a matching method to achieve the optimal vibration reduction effect.
As a more specific embodiment, the vibration generated by the vehicle is different under the condition of different loads, the parameters of the vibration absorbing system can be further optimized according to the condition of the loads, and in the process of calculating the elastic element, the obtaining the mass of the vehicle can include: the mass of the whole automobile except the dynamic vibration absorbing system when the automobile is in idle load and the mass of the whole automobile except the dynamic vibration absorbing system when the automobile is in half load. When the load of the vehicle is smaller, the pitching vibration generated by the cab of the vehicle is more serious, and the vibration of the vehicle is weaker under the condition of full load of the vehicle and can not be regulated, so that the mass except the dynamic vibration absorbing system of the whole vehicle when the vehicle is unloaded and the mass except the dynamic vibration absorbing system of the whole vehicle when the vehicle is half-loaded are obtained as references, the parameters of the elastic element are calculated, and the vibration of the vehicle under the corresponding condition is matched, thereby achieving the optimal vibration reduction effect.
Illustratively, determining the spring element damping ratio based on the spare tire mass and the vehicle mass includes: determining a second damping ratio based on the mass of the whole automobile except the dynamic vibration absorbing system and the mass of the spare tire when the automobile is in idle load; determining a third damping ratio based on the mass of the whole automobile except the dynamic vibration absorbing system and the mass of the spare tire during half-load of the automobile; an optimal damping ratio is determined based on the second damping ratio and the third damping ratio. And respectively calculating corresponding elastic element parameters by taking the half-load condition and the no-load condition of the automobile as interval endpoints, so that a better value range of the elastic element parameters can be obtained, and the pitching vibration of the cab is reduced by matching the optimal elastic element with the load of the automobile according to actual conditions.
As a more specific example, the vibration absorbing system is composed of an automobile spare tire and an elastic element, and the vibration of the cab is caused by the radial runout of the rear wheel tire assembly, dynamic balance and excitation of the road surface, so that the pitching mode of the cab is excited to generate resonance. Therefore, the vibration absorbing system is preferably arranged near the rear suspension of the automobile, the diameter jump of the rear wheel tire assembly is counteracted, the frequency of the vibration is only related to the inherent characteristics (such as mass, shape, material and the like) of the system, and the acquisition of the inherent frequency of the pitching rigid body mode of the automobile cab comprises the following steps: the mass of the part of the automobile except the vibration absorption system; and determining the pitching rigid body mode natural frequency of the automobile cab based on the mass of the parts of the automobile except the vibration absorbing system. The frequency of the vibration is determined based on the original mass of the vehicle where the vibration absorbing system is not installed.
As a more specific example, referring to fig. 4, the dynamic vibration absorbing system matching method measures the natural frequency f0 of the rigid body mode of the cab pitch using a hammering mode test, and proceedsAnd (5) performing a cab working mode test, and finally determining the natural frequency f of the rigid body mode of cab pitching. And calculating the vehicle speed v of the pitching resonance of the cab according to f, and testing the pitching vibration of the cab with the vehicle speed v as the center, wherein the vehicle speed v is v-10km/h, v-5km/h, v, v+5km/h and v+10 km/h. According to the natural frequency f of the pitching rigid body mode of the cab, the mass m1 of the spare tire assembly and the mass m2 of the total spare tire removing assembly of the vehicle, and according to a formula k 1 ＝m 1 ×(2πf) 2 The dynamic vibration absorber stiffness k1 is calculated,
and calculating the damping ratio delta of the dynamic damper. After the elastic element of the dynamic damper is manufactured, loading is carried out for modal test, the natural frequency and damping ratio of the dynamic damper are calculated, and compared with f and delta, three sets of elastic and damping elements with the frequency f1 equal to f and delta 1 equal to (or close to) delta-, delta and delta+ are selected for real vehicle test. And testing the pitching vibration of the cab with the speed of v-10km/h, v-5km/h, v, v+5km/h and v+10km/h of three sets of samples, and carrying out comparative analysis and subjective evaluation to determine a final vibration reduction scheme.
Furthermore, an embodiment of the present application further provides a dynamic vibration absorber system, which includes an automobile spare tire and an elastic element, wherein the spare tire is disposed near a rear suspension of the automobile through the elastic element, and parameters of the elastic element are determined by the matching method of the dynamic vibration absorber system according to any one of the embodiments.
It should be noted that, the implementation manner of the matching embodiment of the dynamic vibration absorbing system is also applicable to the embodiment of the dynamic vibration absorbing system, and the same technical effects can be achieved, which is not described herein again.
Furthermore, an embodiment of the application also provides an automobile, which comprises the aftertreatment system disclosed by the application.
It should be noted that, the vehicle is a vehicle including the above-mentioned aftertreatment system, and the implementation manner of the embodiment of the above-mentioned aftertreatment system is also applicable to the embodiment of the vehicle, so that the same technical effects can be achieved, which is not described herein again.
It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM (Read-Only Memory)/RAM (Random Access Memory ), magnetic disk, optical disc), including instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present application.
According to another aspect of the embodiments of the present application, there is also provided a control device for implementing the above-mentioned dynamic vibration absorbing system matching. FIG. 5 is a schematic diagram of an alternative control method apparatus for dynamic vibration absorber (dynamic vibration absorber) matching according to an embodiment of the present application, as shown in FIG. 5, the apparatus may include:
the first obtaining module 502 is configured to obtain a natural frequency of the pitching rigid body mode of the automobile cab.
A second obtaining module 506, configured to obtain the vehicle mass and the spare tire mass.
A determination module 506 is configured to determine the elastic element stiffness and damping ratio based on the auto cab pitch rigid body mode natural frequency, the auto mass, and the spare tire mass.
It should be noted that, the first obtaining module 502 in this embodiment may be used to perform the step S202, the second obtaining module 504 in this embodiment may be used to perform the step S204, and the determining module 506 in this embodiment may be used to perform the step S206.
It should be noted that the above modules are the same as examples and application scenarios implemented by the corresponding steps, but are not limited to what is disclosed in the above embodiments. It should be noted that the above modules may be implemented in software or in hardware as part of the apparatus shown in fig. 1, where the hardware environment includes a network environment.
According to still another aspect of the embodiments of the present application, there is further provided an electronic device for implementing the above dynamic vibration absorbing system matching method, where the electronic device may be a server, a terminal, or a combination thereof.
Fig. 6 is a block diagram of an alternative electronic device, according to an embodiment of the present application, including a processor 602, a communication interface 604, a memory 606, and a communication bus 608, as shown in fig. 6, wherein the processor 602, the communication interface 604, and the memory 606 communicate with each other via the communication bus 608, wherein,
a memory 606 for storing a computer program;
the processor 602, when executing the computer program stored on the memory 606, performs the following steps:
acquiring the natural frequency of the pitching rigid body mode of the automobile cab;
acquiring the automobile mass and the spare tire assembly mass;
and determining the first rigidity and the first damping ratio of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab, the automobile mass and the spare tire assembly mass.
Alternatively, in the present embodiment, the above-described communication bus may be a PCI (Peripheral Component Interconnect, peripheral component interconnect standard) bus, or an EISA (Extended Industry Standard Architecture ) bus, or the like. The communication bus may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, only one thick line is shown in fig. 6, but not only one bus or one type of bus.
The communication interface is used for communication between the electronic device and other devices.
The memory may include RAM or may include non-volatile memory (non-volatile memory), such as at least one disk memory. Optionally, the memory may also be at least one memory device located remotely from the aforementioned processor.
As an example, as shown in fig. 6, the memory 602 may include, but is not limited to, the first acquiring module 502, the second module 504, and the determining module 506 in the dynamic vibration absorber control device. In addition, other module units in the control device of the dynamic vibration absorbing system may be included, but are not limited to, and are not described in detail in this example.
The processor may be a general purpose processor and may include, but is not limited to: CPU (Central Processing Unit ), NP (Network Processor, network processor), etc.; but also DSP (Digital Signal Processing, digital signal processor), ASIC (Application Specific Integrated Circuit ), FPGA (Field-Programmable Gate Array, field programmable gate array) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments, and this embodiment is not described herein.
It will be understood by those skilled in the art that the structure shown in fig. 6 is only schematic, and the device implementing the above-mentioned dynamic vibration absorbing system matching method may be a terminal device, and the terminal device may be a smart phone (such as an Android mobile phone, an iOS mobile phone, etc.), a tablet computer, a palm computer, a mobile internet device (Mobile Internet Devices, MID), a PAD, a vehicle-mounted computer, etc. Fig. 6 is not limited to the structure of the electronic device. For example, the terminal device may also include more or fewer components (e.g., network interfaces, display devices, etc.) than shown in fig. 6, or have a different configuration than shown in fig. 6.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program for instructing a terminal device to execute in association with hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: flash disk, ROM, RAM, magnetic or optical disk, etc.
According to yet another aspect of embodiments of the present application, there is also provided a storage medium. Alternatively, in the present embodiment, the above-described storage medium may be used for program code for executing the dynamic vibration reducer matching method.
Alternatively, in this embodiment, the storage medium may be located on at least one network device of the plurality of network devices in the network shown in the above embodiment.
Alternatively, in the present embodiment, the storage medium is configured to store program code for performing the steps of:
acquiring the natural frequency of the pitching rigid body mode of the automobile cab;
acquiring the automobile mass and the spare tire assembly mass;
and determining the first rigidity and the first damping ratio of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab, the automobile mass and the spare tire assembly mass.
Alternatively, specific examples in the present embodiment may refer to examples described in the above embodiments, which are not described in detail in the present embodiment.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a U disk, ROM, RAM, a mobile hard disk, a magnetic disk or an optical disk.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
The integrated units in the above embodiments may be stored in the above-described computer-readable storage medium if implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause one or more computer devices (which may be personal computers, servers or network devices, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In several embodiments provided in the present application, it should be understood that the disclosed client may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, such as the division of the units, is merely a logical function division, and may be implemented in another manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in the present embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.
Claims (8)
1. A dynamic vibration absorbing system matching method, the dynamic vibration absorbing system comprising a spare tire assembly and an elastic element, the spare tire assembly being arranged near a rear suspension of an automobile through the elastic element, the method comprising:
acquiring the natural frequency of a pitching rigid body mode of an automobile cab;
acquiring the quality of an automobile and the quality of a spare tire assembly;
determining a first stiffness and a first damping ratio of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab, the automobile mass and the spare tire assembly mass;
the determining the first stiffness and first damping ratio of the elastic element based on the natural frequency of the rigid body mode of pitching of the automobile cab, the automobile mass and the spare tire assembly mass comprises:
determining a first stiffness of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab and the mass of the spare tire assembly;
determining a first damping ratio of the elastic element based on the spare tire assembly mass and the vehicle mass;
furthermore, the method comprises the following steps:
carrying out loading modal test by using the elastic element with the first rigidity and the first damping ratio, and further optimizing and selecting the dynamic vibration absorbing system;
calculating a second stiffness and a second damping ratio of the elastic element under modal testing; comparing the first rigidity and the first damping ratio with the second rigidity and the second damping ratio, and determining the value range of the first rigidity and the first damping ratio.
2. The dynamic vibration absorbing system matching method according to claim 1, comprising, after said determining the range of values of the first stiffness and the first damping ratio:
testing the first rigidity and the first damping ratio in the value range at a preset vehicle speed;
acquiring first vibration information in a test;
and selecting an optimal value in the value range based on the first vibration information.
3. The dynamic vibration absorbing system matching method according to claim 2, further comprising:
determining a preset vehicle speed range of the preset vehicle speed based on the preset vehicle speed;
testing the first rigidity and the first damping ratio in the value range with a preset vehicle speed range;
acquiring second vibration information at different vehicle speeds;
and selecting an optimal value in the value range based on the second vibration information.
4. The dynamic vibration absorbing system matching method of claim 1, wherein the vehicle mass comprises:
the mass of the whole automobile except the dynamic vibration absorbing system when the automobile is in idle load and the mass of the whole automobile except the dynamic vibration absorbing system when the automobile is in half load.
5. The dynamic vibration absorbing system matching method of claim 4, wherein said determining a first damping ratio of said elastic element based on said spare tire assembly mass and said vehicle mass comprises:
determining a second damping ratio based on the mass of the whole automobile except the dynamic vibration absorbing system and the mass of the spare tire assembly when the automobile is in idle load;
determining a third damping ratio based on the mass of the whole automobile except the dynamic vibration absorbing system and the mass of the spare tire assembly during half-load of the automobile;
an optimal damping ratio is determined based on the second damping ratio and the third damping ratio.
6. A dynamic vibration absorbing system control device, characterized in that it is applied to the dynamic vibration absorbing system matching method according to any one of claims 1 to 5, and comprises:
the first acquisition module is used for acquiring the natural frequency of the pitching rigid body mode of the automobile cab;
the second acquisition module is used for acquiring the automobile mass and the spare tire assembly mass;
and the determining module is used for determining the rigidity and damping ratio of the elastic element based on the natural frequency of the pitching rigid body mode of the automobile cab, the automobile mass and the spare tire assembly mass.
7. The dynamic vibration absorbing system is characterized by comprising an automobile spare tire and an elastic element, wherein the automobile spare tire is arranged near a rear suspension of an automobile through the elastic element, and parameters of the elastic element are determined by the matching method of the dynamic vibration absorbing system according to any one of claims 1-5.
8. An automobile comprising the dynamic vibration absorbing system as defined in claim 7.
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| CN113525534A (en) * | 2021-08-10 | 2021-10-22 | 东风柳州汽车有限公司 | Cab semi-active suspension control method and device based on frequency division control |
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| CN101315114B (en) * | 2007-06-01 | 2011-05-11 | 奇瑞汽车股份有限公司 | Vibration damping and energy-absorbing device of vehicle auxiliary frame and method thereof |
| CN102465994A (en) * | 2010-11-15 | 2012-05-23 | 上海骆氏减震件有限公司 | Dynamic vibration absorber and automobile steering wheel comprising same |
| CN103121475B (en) * | 2013-03-08 | 2015-06-10 | 山东理工大学 | Design method for optimal damping ratio of suspension system of cab |
| CN103909986B (en) * | 2014-03-31 | 2017-07-28 | 郑州宇通客车股份有限公司 | Vibration absorber and the vehicle spare tyre support and vehicle using the device |
| KR20160066845A (en) * | 2014-12-03 | 2016-06-13 | 현대자동차주식회사 | Vibration control system of vehicle tail |
| CN112413027B (en) * | 2019-08-23 | 2022-04-15 | 比亚迪股份有限公司 | Vibration absorption device, optimization design method of vibration absorption device and automobile |
| CN113606281A (en) * | 2021-07-19 | 2021-11-05 | 东风汽车集团股份有限公司 | Automobile dynamic vibration absorption system and control method |
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