TWI461946B - Method of designing a vibration isolating system and a related elecronic device - Google Patents

Description

Method for designing vibration isolation system and electronic device thereof

The invention relates to a vibration isolation system, in particular to a method for designing a vibration isolation system and an electronic device thereof.

There may be a plurality of vibration sources in a conventional electronic product, such as a speaker, a fan or a storage device, etc., which may cause abnormal vibration or noise when the user operates the electronic product. In general, the conventional vibration isolation method is to provide a vibration isolation ring composed of an elastic material between the vibration source and the casing to prevent vibration from being transmitted through the casing. The vibration source and the vibration isolation ring can be regarded as a one-dimensional linear vibration system. If the natural frequency of the vibration system is substantially close to the resonance frequency of the vibration source, considerable vibration will occur, so how to choose an appropriate vibration isolation ring is very important. . The elastic constant of the vibration isolating ring is related to its size and shape. The traditional method is known after the vibration isolation ring is produced. Therefore, the traditional design method of the vibration isolation ring is designed or purchased with years of accumulated experience. The vibration isolation ring makes it easy to select an improper vibration isolation ring, and it is found that the vibration isolation effect is not good at the verification quality control stage, so that the labor cost and the manufacturing cost of the product are improved. Therefore, how to develop a design method that can produce suitable vibration isolating components according to the characteristics of each vibration system is one of the goals that is urgently needed for the current institutional industry.

The present invention provides a method for designing a vibration isolation system and an electronic device thereof to solve the above problems.

The patent application scope of the present invention discloses a method for designing a vibration isolation system including a vibration isolation member and a vibration isolating object. The method comprises inputting a plurality of physical parameters of the vibration isolation member; obtaining a correlation function of each physical parameter and a corresponding weighting function; and calculating one of the vibration isolation members by using each physical parameter correlation function and each corresponding weighting function An elastic constant; calculating a natural frequency of the vibration isolation system by using the elastic constant and the weight of the vibration isolating member; and comparing the natural frequency with a resonant frequency of the vibration isolating object; and analyzing the The result is compared to produce a design value for each physical parameter of the vibration isolating member.

The patent application scope of the present invention further discloses an electronic device for designing a vibration isolation system, the vibration isolation system comprising a vibration isolation member and a vibration isolating material. The electronic device includes an input unit for inputting a plurality of physical parameters of the vibration isolating member, a database for storing related information of the vibration isolating member, and an arithmetic unit electrically connected to the input unit and connected To the database. The operation unit is configured to receive the plurality of physical parameters output by the input unit, and then connect to the database to obtain a correlation function and a corresponding weighting function of each physical parameter. The arithmetic unit is further configured to calculate a natural frequency of the vibration isolation system by using each physical parameter correlation function, the corresponding weighting function, and the weight of the vibration isolating member and the vibration isolating object. The arithmetic unit is further configured to compare the natural frequency with a resonant frequency of the vibration isolating object to generate a design value of each physical parameter of the vibration isolating member.

The invention designs the size and type of the vibration isolation member by digital simulation, and uses the operation unit to match the database to verify whether the simulated vibration isolation component can meet the design requirements of the physical vibration isolation component, so as to reduce the design manpower and reduce the trial work. Work hours, and the manpower and expense required to solve resonance problems.

Please refer to FIG. 1. FIG. 1 is a functional block diagram of an electronic device 10 according to an embodiment of the present invention. The electronic device 10 is used to calculate various physical parameters of a vibration isolation system 12 by digital simulation to provide a production line for physical product production. Please refer to FIG. 2, which is a schematic diagram of the vibration isolation system 12 according to an embodiment of the present invention. The vibration isolation system 12 includes at least one vibration isolating member 14 and one of the vibration isolating objects 16 disposed on the vibration isolating member 14 (or may be a test object that generates a vibration frequency). 3 and 4, FIG. 3 is a schematic view showing the appearance of the vibration isolating member 14 according to the first embodiment of the present invention, and FIG. 4 is a cross-sectional view showing the vibration isolating member 14 of the first embodiment of the present invention. Generally, the vibration isolating object 16 can be a vibration source that generates vibration during operation, such as a speaker, a fan, a CD player or a hard disk drive, and the like. The vibration isolating member 14 is an I-shaped vibration isolating ring composed of an elastic material. When the vibration isolating body 16 is disposed on a casing 18 by the vibration isolating member 14, the vibration generated by the vibration insulator 16 can be absorbed by the vibration isolating member 14 to avoid transmission to the casing 18 and affect other electronic components. operating.

As shown in FIG. 1 , the electronic device 10 includes an input unit 20 , a database 22 , an operation unit 24 , and an output unit 26 . The input unit 20 can be a device for inputting information such as a mouse, a keyboard or a touch interface. The database 22 can be a near-end host or a remote server for storing information about the vibration isolating member 14. The output unit 26 can be a display for displaying information for identification by the user. The arithmetic unit 24 is electrically connected to the input unit 20 and the output unit 26, and the characteristics of the visual library 22 are maintained in a connected state. The operation unit 24 can be used to interpret the information input by the input unit 20, connect to the database 22 to obtain the related parameter function and weighting function, and use the parameter function, the weighting function, and the relevant parameters of the vibration isolation system 12 to calculate the interval. The optimum design value of each physical parameter of the vibrating member 14.

Please refer to FIG. 5. FIG. 5 is a flow chart showing the design of the vibration isolation system 12 according to the embodiment of the present invention. The method includes the following steps:

Step 100: According to the characteristics of the vibration isolation system 12, the user inputs the plurality of physical parameters of the vibration isolating member 14 by using the input unit 20.

Step 102: The operation unit 24 receives and records the plurality of physical parameters input by the input unit 20.

Step 104: The computing unit 24 is connected to the database 22, and obtains a correlation function of each physical parameter according to the information stored in the database 22, and a weighting function corresponding to each physical parameter correlation function.

Step 106: The arithmetic unit 24 calculates an elastic constant k of the vibration isolating member 14 by using each physical parameter correlation function and each corresponding weighting function.

Step 108: The arithmetic unit 24 calculates the natural frequency fn of the vibration isolation system 12 by using the elastic constant k and the sum of the weights of the vibration isolating member 14 and the vibration isolating body 16 (that is, the system weight of the vibration isolation system 12). Unit 26 can be used to display the natural frequency fn for reference by the user.

Step 110: The arithmetic unit 24 compares the natural frequency fn with the resonant frequency f of one of the isolators 16. When fn is less than f/2, step 112 is performed; when fn is greater than f/2, step 114 is performed.

Step 112: The user uses the plurality of physical parameters input in step 100 as the design value of the vibration isolating member 14, and then performs step 116.

Step 114: The user reselects the plurality of physical parameters different from the input in step 100 and inputs to the input unit 20, and then performs step 102.

Step 116: End.

The above steps are described in detail herein. First, the user can select the physical parameter values of the appropriate vibration isolating members 14 according to the work experience and the structural characteristics of the vibration isolation system 12, and input them into the electronic device 10 through the input unit 20 for digital analog verification. As shown in Figures 3 and 4, the physical parameters of the vibration isolating member 14 may include a radial length R, a cross-sectional area A (A = πR ^{2 -} πr ² ), a height H ₁ and H ₂ , a pre- The pressure value d, and a material strength I. After the operation unit 24 reads the plurality of physical parameters, it can connect to the database 22, and according to the information stored in the database 22, determine and obtain a correlation function of each physical parameter, for example: g(R) , g(A/H ₁ ), g(A/H ₂ ), g(d), g(I), and the corresponding weighting function, for example: p1, p2, p3, p4, p5, and calculate the elastic force Constant k. The relationship between the elastic constant k and the correlation function of each physical parameter and each weighting function may be:

It is worth mentioning that the weighting function can be one of the relative elastic constants k for each physical parameter in different vibration isolation directions. For example, the weighting system can be between 0 and 1, that is, The weighting function can be used to represent the influence weight of each corresponding physical parameter correlation function in the formula k.

After calculating the spring constant k, the arithmetic unit 24 then substitutes the spring constant k and the sum of the weights of the vibration isolating member 14 and the vibration isolating object 16 (that is, the system weight m) into the natural frequency formula fn of the vibration isolation system 12, To get the value of the natural frequency fn:

The output unit 26 can be used to display the natural frequency fn for the user to recognize and reference. In the embodiment of the present invention, the natural frequency fn of the vibration isolation system 12 is generally lower than the one-half value of the resonance frequency f of the vibration insulator 16 (vibration source), so that a better vibration isolation effect can be obtained. Therefore, the arithmetic unit 24 can be further used to compare the natural frequency fn of the vibration isolation system 12 with the magnitude of the resonance frequency f of the vibration insulator 16. When the natural frequency fn is substantially greater than one-half of the resonant frequency f, the plurality of physical parameters input in step 100 are not the optimal design values of the vibration isolating member 14, so the user may additionally select different steps. The plurality of physical parameters input by 100 are re-typed into the input unit 20 to re-execute steps 102 to 110. Conversely, when the natural frequency fn is substantially less than one-half of the resonant frequency f, the plurality of physical parameters input in step 100 can be used as the design value of the vibration isolating member 14. At this time, the output unit 26 can be further used to display the comparison result and the design value of the vibration isolating member 14 to provide a user reference, thereby completing the design flow of the vibration isolation system 12 of the present invention.

In addition, please refer to FIG. 6 and FIG. 7 , FIG. 6 is a schematic diagram of a vibration isolating member 30 according to a second embodiment of the present invention, and FIG. 7 is a third embodiment of the present invention. Schematic diagram of the vibration isolating member 40. As shown in Fig. 6, the vibration isolating member 30 may be formed with a plurality of fixing ribs 301 on the side wall surface of the intermediate hole. The fixing rib 301 can be used to reduce the contact area of the vibration isolating member 30 with the housing 18. However, the structural characteristics of the fixing rib 301 may affect the value of the elastic constant k. Therefore, the design variable of the equation of the aforementioned elastic constant k may be added to one of the lengths L or a cross-sectional area A' of the fixing rib 301, and the operation unit 24 reads When the physical parameters of the fixed rib 301 are reached, the correlation function of the physical parameter can be obtained by linking to the database 22, for example: g(L) and g(A'), and the corresponding weighting functions p6 and p7. In the subsequent process, the arithmetic unit 24 will also substitute g(L), g(A'), p6 and p7 into the calculation formula of the elastic constant k and the natural frequency fn to obtain the most accurate natural frequency value of the vibration isolation system. . In addition, as shown in FIG. 7, the vibration isolating member 40 may be a double-shaped vibration isolating ring, and the vibration isolating member 40 is different from the vibration isolating member 14 of the first embodiment in that the third embodiment is in the vibration isolating member. Each height of the different sections of 40 may be a design variable of the equation of the spring constant k, meaning that the vibration isolating member 40 additionally has physical parameters of height H ₃ and height H ₄ . Therefore, the computing unit 24 can obtain the physical parameter correlation function and the corresponding weighting function corresponding to the height H ₃ and the height H ₄ through the database 22 for substituting into the calculation equation of the subsequent elastic constant k and the natural frequency fn. Precise natural frequency values.

In summary, the design method of the present invention uses a digital simulation method to obtain a large amount of calculation data to establish a database with perfect information, so that the physical database can be effectively utilized to calculate various physical parameters (ie, design variables) and Corresponding equation between natural frequencies. The user can input the corresponding physical parameters of the vibration isolation member required for the vibration isolation system by analyzing the structural characteristics of the vibration isolation system. Then, using the large amount of information stored in the database, the arithmetic unit can quickly calculate the spring constant of the vibration isolating member and the natural frequency of the vibration isolation system to determine whether the initial input value meets the design requirements. Therefore, the present invention can effectively grasp the structural characteristics and design variables of the vibration isolating member in a digital analog mode, and avoid the shortcomings such as long production time and high design cost caused by the conventional vibration-isolating device in the prior design and the error-removing design.

Compared with the prior art, the present invention designs the size and type of the vibration isolating device by digital simulation, and uses the computing unit to match the database to verify whether the simulated vibration isolating component can meet the design requirements of the physical vibration isolation component. Reduce manpower and expense for design manpower, reduced trial work time, and savings in solving resonance problems.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10. . . Electronic device

12. . . Vibration isolation system

14. . . Vibration isolation

16. . . Isolator

18. . . case

20. . . Input unit

twenty two. . . database

twenty four. . . Arithmetic unit

26. . . Output unit

30. . . Vibration isolation

301. . . Fixed rib

40. . . Vibration isolation

100, 102, 104, 106, 108, 110, 112, 114, 116. . . step

FIG. 1 is a functional block diagram of an electronic device according to an embodiment of the present invention.

2 is a schematic view of a vibration isolation system according to an embodiment of the present invention.

Fig. 3 is a schematic view showing the appearance of a vibration isolating member according to a first embodiment of the present invention.

Fig. 4 is a cross-sectional view showing the vibration isolating member of the first embodiment of the present invention.

Figure 5 is a flow chart showing the design of the vibration isolation system of the embodiment of the present invention.

Fig. 6 is a view showing the vibration isolating member of the second embodiment of the present invention.

Figure 7 is a schematic view of a vibration isolating member according to a third embodiment of the present invention.

100, 102, 104, 106, 108, 110, 112, 114, 116. . . step

Claims (13)

A method for designing a vibration isolation system, the vibration isolation system comprising a vibration isolation member and a vibration isolating object, the method for calculating physical parameters of the vibration isolation member for fabricating a physical vibration isolation member, the method comprising: Inputting a plurality of physical parameters of the vibration isolation member; obtaining a correlation function of each physical parameter and a corresponding weighting function; calculating an elastic constant of the vibration isolation member by using each physical parameter correlation function and each corresponding weighting function, wherein The weighting function is a weight corresponding to the elastic constant of each physical parameter in different vibration isolation directions; using the elastic constant and the vibration isolating member and the weight of the vibration isolating object, one of the vibration isolation systems is calculated. a natural frequency; comparing the natural frequency with a resonant frequency of the one of the isolators; and analyzing the comparison to generate a design value of each physical parameter of the vibration isolating member. The method of claim 1, wherein the plurality of physical parameters input to the vibration isolating member comprises: inputting the plurality of physical parameters corresponding to the vibration isolation system. The method of claim 1, wherein obtaining a correlation function of each physical parameter and the corresponding weighting function comprises: connecting to a database, and obtaining information according to the information stored in the database A correlation function of each physical parameter and the corresponding weighting function. The method of claim 1, wherein analyzing the comparison result to generate a design value of each physical parameter of the vibration isolating member comprises: when the natural frequency of the vibration isolation system is substantially smaller than the vibration isolation material At one-half of the resonant frequency, each physical parameter of the input is used as a design value of the vibration isolating member; and when the natural frequency of the vibration isolation system is substantially greater than the resonant frequency of the isolating object In one step, the physical parameters of the vibration isolating member different from the aforementioned input are input. The method of claim 1, wherein the plurality of physical parameters include a radial length of one of the vibration isolating members, a cross-sectional area of the vibration isolating member, a height of the vibration isolating member, and one of the vibration isolating members. The preload value and the material strength of one of the vibration isolating members. An electronic device for designing a vibration isolation system, the vibration isolation system comprising a vibration isolation member and a vibration isolating device, wherein the electronic device is configured to calculate physical parameters of the vibration isolation member for fabricating a physical vibration isolating member, The electronic device includes: an input unit for inputting a plurality of physical parameters of the vibration isolating member; a database for storing relevant information of the vibration isolating member; and an arithmetic unit electrically connected to the input unit and connected Line to the database, the operation unit is configured to receive the plurality of physical parameters output by the input unit, and then connect to the database to obtain a correlation function of each physical parameter and a corresponding weighting function, the operation The unit is additionally used to utilize each physical parameter correlation function, the corresponding weighting function And the weight of the vibration isolating member and the vibration isolating object to calculate a natural frequency of the vibration isolating system, and the computing unit is further configured to compare the natural frequency with a resonant frequency of the vibration isolating object, A design value of each physical parameter of the vibration isolating member is generated, wherein the weighting function is weighted relative to one of the elastic constants under the condition that the physical parameters are in different vibration isolation directions. The electronic device of claim 6, further comprising: an output unit electrically connected to the operation unit, wherein the output unit is configured to display the natural frequency of the vibration isolation system, the comparison result, and the vibration isolation member The design value. The electronic device of claim 6, wherein the weighting function is that each physical parameter is weighted with respect to one of the elastic constants in different vibration isolation directions. The electronic device of claim 8, wherein the weight is substantially between 0 and 1. The electronic device of claim 6, wherein the vibration isolating member is an I-shaped vibration isolating ring. The electronic device of claim 6, wherein the plurality of physical parameters include a radial length of one of the vibration isolating members, a cross-sectional area of the vibration isolating member, a height of the vibration isolating member, and the vibration isolating member a preload value, and a material strength of the vibration isolating member. The electronic device of claim 11, wherein the plurality of physical parameters further comprise respective heights of different sections of the vibration isolating member. The electronic device of claim 11, wherein the plurality of physical parameters are another A length of one of the fixing ribs of the vibration isolating member is included.