Load identification method, bottom plate vibration calculation method and device and storage medium

Abstract

The invention discloses a load identification method, a bottom plate vibration calculation method and device and a storage medium. The method comprises the following steps: acquiring vibration response information of all response test points of a compressor when the compressor works; combining transfer functions between every two response test points and a preset excitation point to form a transfer function matrix, and determining a target transfer function matrix from the transfer function matrix; determining an applied load of a preset excitation point according to the vibration response information of the target test point and the target transfer function matrix; wherein the target test point is a test point corresponding to the target transfer function matrix. Therefore, the applied load of the preset excitation point of the compressor is identified through the vibration response information of the target test point of the compressor and the target transfer function matrix between the target test point and the preset excitation point; compared with building a finite element model to calculate the load of the preset excitation point of the compressor, calculation steps can be reduced, and the calculation amount is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a load identification method, a base plate vibration calculation method, a device and a storage medium. Background Art

[0002] The compressor is one of the main excitation sources of the air-conditioning unit. The excitation force of the compressor is generally composed of electromagnetic excitation, gas dynamic excitation, mechanical excitation, and oil dynamic excitation. If the above excitation is obtained by the compressor dynamics model, accurate parameters need to be obtained, but these parameters are difficult to obtain directly, which makes it difficult to directly obtain the compressor excitation force.

[0003] In the related art, the excitation of the compressor is calculated by establishing a finite element model. This method requires the establishment of a finite element model when solving the excitation, which is a large task. Summary of the invention

[0004] The main purpose of the present invention is to propose a load identification method, a base plate vibration calculation method, a device and a storage medium, aiming to reduce the calculation steps and the amount of calculation.

[0005] To achieve the above object, the present invention proposes a load identification method, which comprises the following steps:

[0006] Obtaining vibration response information of all response test points of the compressor when the compressor is working;

[0007] Combining the transfer functions between every two response test points and the preset excitation points to form a transfer function matrix, and determining a target transfer function matrix from the transfer function matrix;

[0008] The applied load of the preset excitation point is determined according to the vibration response information of the target test point and the target transfer function matrix; wherein the target test point is the test point corresponding to the target transfer function matrix.

[0009] Optionally, the step of determining a target transfer function matrix from the transfer function matrix comprises:

[0010] A transfer function matrix with the smallest condition number among all the transfer function matrices is determined as a target transfer function matrix.

[0011] Optionally, the step of determining the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix includes:

[0012] Decomposing and inverting the determined target transfer function matrix to obtain a target transfer function inverse matrix;

[0013] The response vibration information of the target test point is multiplied by the inverse matrix of the target transfer function to obtain the applied load of the preset excitation point.

[0014] Optionally, the step of obtaining vibration response information of all response test points of the compressor when the compressor is working includes:

[0015] The acquired vibration response information of all response test points is vibration response information when the compressor operates at a preset frequency.

[0016] Optionally, before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the step further includes:

[0017] Two preset excitation points are arranged on the surface of the compressor; wherein a line connecting the two preset excitation points passes through the centroid of the compressor.

[0018] Optionally, before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the step further includes:

[0019] At least three response test points are arranged on the surface of the compressor; wherein the upper section, the middle section and the lower section of the compressor surface are respectively arranged with a plurality of response test points arranged at intervals.

[0020] Optionally, before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the step further includes:

[0021] A transfer function between a preset excitation point and the response test point is obtained.

[0022] Optionally, the step of obtaining a transfer function between a preset excitation point and the response test point includes:

[0023] Tapping the preset excitation point according to a preset test load;

[0024] Obtain the test vibration response information of all response test points;

[0025] According to the preset test load and the test vibration response, a transfer function between each response point test point and a preset excitation point is constructed.

[0026] Optionally, after the step of determining the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix, the step further includes:

[0027] The applied load of the preset excitation point is verified, and the applied load that meets the preset accuracy is determined as the target load.

[0028] Optionally, the step of verifying the applied load at the preset excitation point and determining the applied load that meets a preset accuracy as the target load includes:

[0029] Acquiring vibration response information of a verification point of the compressor and a transfer function between the verification point and the preset excitation point;

[0030] Calculating and obtaining calculated vibration response information of the verification point according to a transfer function between the verification point and the preset excitation point and an applied load of the preset excitation point;

[0031] When the deviation between the calculated vibration response information of the verification point and the vibration response information of the verification point is within a preset range, the applied load of the preset excitation point is determined to be the target load.

[0032] Optionally, the load identification method further includes:

[0033] While obtaining the vibration response information of all response test points of the compressor when the compressor is working, the vibration response information of the verification point of the compressor is obtained.

[0034] Optionally, before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the step further includes:

[0035] Arrange verification points at the feet of the compressor.

[0036] In addition, the present invention also provides a method for calculating the vibration of a base plate of an air conditioning unit, the method comprising the following steps:

[0037] obtaining an applied load at a preset excitation point of the compressor;

[0038] The vibration response information of the base plate is determined according to the applied load of the preset excitation point.

[0039] Optionally, the step of determining the vibration response information of the base plate according to the applied load of the preset excitation point includes:

[0040] Establish finite element model of air conditioning unit;

[0041] Based on the finite element model, vibration response information of the detection point of the air-conditioning unit is obtained according to the applied load analysis of the acquired preset excitation point.

[0042] Optionally, before the step of obtaining the applied load of the preset excitation point of the compressor, the step further includes:

[0043] Detection points are arranged on the upper and lower sides of the vibration isolator of the machine foot of the air conditioning unit respectively.

[0044] In addition, the present invention also provides a load identification device for a compressor, which includes a processor, a memory, and a control program stored in the memory and executable on the processor, and when the control program is executed by the processor, the steps of the load identification method for the compressor as described above are implemented.

[0045] In addition, the present invention also provides a base plate vibration calculation device for an air-conditioning unit, the base plate vibration calculation device for the air-conditioning unit comprising a processor, a memory, and a control program stored in the memory and executable on the processor, and the control program, when executed by the processor, implements the steps of the base plate vibration calculation method for the air-conditioning unit as described above.

[0046] In addition, the present invention also provides a computer-readable storage medium, which stores a control program. When the control program is executed by a processor, it implements the various steps of the load identification method described above or the various steps of the base plate vibration calculation method described above.

[0047] The present invention provides a load identification method, a base plate vibration calculation method, a device and a storage medium, which obtain the vibration response information of all response test points of the compressor when the compressor is working; combine the transfer functions between every two response test points and the preset excitation points to form a transfer function matrix, and determine the target transfer function matrix from the transfer function matrix; determine the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix; wherein the target test point is the test point corresponding to the target transfer function matrix. In this way, the present invention identifies the applied load of the preset excitation point of the compressor through the vibration response information of the target test point of the compressor and the target transfer function matrix between the target test point and the preset excitation point, which can reduce the calculation steps and the amount of calculation compared to establishing a finite element model to calculate the load of the preset excitation point of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0049] Figure 1 It is a structural schematic diagram of an air conditioning device involved in an embodiment of the present invention;

[0050] Figure 2 The arrangement of the response test points, preset excitation points and verification points on the compressor surface in the present invention is shown.

[0051] Figure 3 It is a flow chart of the first embodiment of the load identification method of the present invention;

[0052] Figure 4 This is a flow chart of step S30 in the first embodiment of the load identification method of the present invention;

[0053] Figure 5 It is a flow chart of the second embodiment of the load identification method of the present invention;

[0054] Figure 6 It is a flow chart of a third embodiment of a load identification method of the present invention;

[0055] Figure 7 This is a flow chart of step S60 in the third embodiment of the load identification method of the present invention;

[0056] Figure 8 It is a flowchart of the first embodiment of the base plate vibration calculation method of the present invention.

[0057] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0058] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0059] The compressor is one of the main excitation sources of the air-conditioning unit. The excitation force of the compressor is generally composed of electromagnetic excitation, gas dynamic excitation, mechanical excitation, and oil dynamic excitation. If the above excitation is obtained by the compressor dynamics model, accurate parameters need to be obtained, but these parameters are difficult to obtain directly, which makes it difficult to directly obtain the compressor excitation force.

[0060] In the related art, the excitation is calculated by establishing a finite element model. This method requires the establishment of a finite element model when solving the excitation, which is a large task.

[0061] Based on this, the present invention provides a load identification method, a base plate vibration calculation method, a device and a storage medium, referring to Figure 8, preset excitation points 1 and response test points 2 are set on the surface of the compressor 100, and the present invention obtains the vibration response information of all response test points 2 of the compressor 100 when the compressor is working; the transfer functions between every two response test points 1 and the preset excitation point 1 are combined to form a transfer function matrix, and the target transfer function matrix is ​​determined from the transfer function matrix; the applied load of the preset excitation point is determined according to the vibration response information of the target test point and the target transfer function matrix; wherein the target test point is the test point corresponding to the target transfer function matrix. In this way, the present invention identifies the applied load of the preset excitation point of the compressor through the vibration response information of the target test point of the compressor and the target transfer function matrix between the target test point and the preset excitation point, which can reduce the calculation steps and the amount of calculation compared to establishing a finite element model to calculate the load of the preset excitation point of the compressor.

[0062] In order to better understand the technical solution, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0063] As an implementation method, the hardware environment architecture involved in the compressor load identification method can be as follows: Figure 1 shown.

[0064] The load identification device of the compressor includes: a processor 101, such as a CPU, a memory 102, and a communication bus 103. The communication bus 103 is used to realize the connection and communication between these components. The processor 102 is used to call an application program to perform a control operation.

[0065] The memory 102 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory.

[0066] It can be understood that, in one embodiment, the control program for implementing the load identification process of the compressor is stored in the memory 102 of the load identification device of the compressor, and when the processor 101 calls the control program from the memory 102, the following operations are performed:

[0067] The load identification method of the compressor comprises the following steps:

[0068] Obtaining vibration response information of all response test points of the compressor when the compressor is working;

[0069] Combining the transfer functions between every two response test points and the preset excitation points to form a transfer function matrix, and determining a target transfer function matrix from the transfer function matrix;

[0070] The applied load of the preset excitation point is determined according to the vibration response information of the target test point and the target transfer function matrix; wherein the target test point is the test point corresponding to the target transfer function matrix.

[0071] Based on the hardware architecture of the above-mentioned compressor load identification method, the following embodiments of the present invention are proposed.

[0072] First embodiment

[0073] Please refer to Figure 2 and Figure 3 The load identification method of the compressor proposed in this embodiment includes the following steps:

[0074] Step S10, obtaining vibration response information of all response test points 2 of the compressor 100 when the compressor is working.

[0075] After the air conditioning unit is turned on, the compressor enters the working state, and the vibration response information of the response test point is detected by the sensor set at the response test point. The vibration response information can be obtained by testing with a displacement sensor or an acceleration sensor. If the acceleration signal is collected, the signal needs to be integrated to obtain the corresponding displacement.

[0076] The vibration response information of all response test points obtained is the vibration response information when the compressor works at a preset frequency. That is, the vibration response information of all response test points obtained is the vibration response information obtained by sensor testing at the same operating frequency of the compressor.

[0077] Step S20: combining the transfer functions between every two response test points and the preset excitation points to form a transfer function matrix, and determining a target transfer function matrix from the transfer function matrix.

[0078] In this embodiment, reference Figure 2 , the number of preset excitation points 1 is two. The compressor has six degrees of freedom, and the load of each preset excitation point has three degrees of freedom. Therefore, two preset excitation points need to be set. The relationship between the vibration response information of each response test point and the applied load of each preset excitation point is a transfer function, that is, after the sensor detects the vibration response information of the response test point, the load of the preset excitation point can be calculated based on the vibration response information of the response test point and the transfer function between the response test point and the preset excitation point.

[0079] The line connecting the two preset excitation points 1 passes through the centroid of the compressor 100. It can be understood that when arranging the preset excitation points, arranging the two preset excitation points on the surface of the compressor and the line connecting the two preset excitation points passes through the centroid of the compressor can reduce the error in load identification and improve the accuracy of the load identification result.

[0080] It can be understood that the transfer function matrix can be formed by combining the transfer functions between two response test points and two preset excitation points. In this embodiment, the number of response test points is multiple. After combining the transfer functions between any two response test points and two preset excitation points, multiple transfer function matrices are formed. The target transfer function matrix is ​​screened out from the multiple transfer function matrices. Since the process of calculating using the transfer function matrix has the characteristic of amplifying errors, the target transfer function matrix is ​​the transfer function matrix with the smallest error amplification effect among the multiple transfer function matrices. And the two response test points corresponding to the target transfer function matrix are the target test points.

[0081] Optionally, the step of determining a target transfer function matrix from the transfer function matrix comprises:

[0082] A transfer function matrix with the smallest condition number among all the transfer function matrices is determined as a target transfer function matrix.

[0083] It can be understood that the target transfer function matrix screened out by the method of minimizing the condition number of the transfer function matrix can reduce the error when performing load identification calculations.

[0084] For example, the linear equation between the load of the preset excitation point and the vibration response information of the response test point satisfies AX=Y, where A is the transfer function matrix, X is the matrix composed of the applied loads of the two preset excitation points, Y is the matrix composed of the vibration response information of the two response test points, and A is the transfer function matrix composed of the transfer functions between the two response test points and the two preset excitation points, as shown in the following formula:

[0085]

[0086] The condition number of a matrix is ​​an important concept in numerical analysis and linear algebra, which describes certain characteristics of the matrix.

[0087] In this linear equation, A is the coefficient matrix, X is the value to be solved, and Y is the measured value. The condition number of matrix A uniquely determines the degree to which the solution X of the linear equation is affected by the noise of the observed value Y. The larger the condition number, the more serious the impact of noise on X, which means that the rate of change of X deviates more from the rate of change of Y.

[0088] In this embodiment, the target transfer function matrix is ​​screened out using the principle of minimum condition number for multiple transfer function matrices, that is, two target test points that are least affected by the transfer function matrix can be screened out, thereby achieving the purpose of reducing errors.

[0089] Step S30, determining the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix; wherein the target test point is the test point corresponding to the target transfer function matrix.

[0090] After the two target test points and the two preset excitation points are determined, the target transfer function matrix A formed between the two target test points and the preset excitation points is determined. The applied loads of the two excitation points are calculated based on the target transfer function matrix A and the vibration response information Y of the target test points. This embodiment can achieve the purpose of improving the accuracy of identifying and calculating the applied loads of the two preset excitation points.

[0091] Optional, see Figure 4 The step of determining the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix comprises:

[0092] Step S31, decomposing and inverting the determined target transfer function matrix to obtain a target transfer function inverse matrix;

[0093] Step S32: multiplying the response vibration information of the target test point by the inverse matrix of the target transfer function to obtain the applied load of the preset excitation point.

[0094] Since the relationship between the load of the preset excitation point and the vibration response information of the target test point satisfies the linear equation AX=Y, after the value of Y is obtained, when solving the value of X, the target transfer function matrix A can be subjected to matrix singular value decomposition (SVD for short), and then inversely calculated to reduce input errors. In this embodiment, the applied load of the preset excitation point is obtained by inversely calculating the vibration response information, and the matrix Y formed by the vibration response information of the two target test points is multiplied by the inverse matrix of the target transfer function.

[0095] In this way, the present invention identifies the applied load of the preset excitation point of the compressor through the vibration response information of the target test point of the compressor and the target transfer function matrix between the target test point and the preset excitation point. Compared with establishing a finite element model to calculate the load of the preset excitation point of the compressor, the calculation steps can be reduced and the amount of calculation can be reduced.

[0096] Second embodiment

[0097] Please refer to Figure 5This embodiment is based on all the above embodiments, and before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, it also includes:

[0098] Step S40, arranging two preset excitation points on the surface of the compressor; arranging at least three response test points on the surface of the compressor; wherein the upper section, the middle section and the lower section of the compressor surface are respectively arranged with a plurality of response test points arranged at intervals.

[0099] It can be understood that a plurality of response test points are arranged at intervals in the upper, middle and lower sections of the compressor surface, respectively, so as to achieve the purpose of fully covering the response test points on the compressor surface, so as to increase the probability that the screened target test points can meet the accuracy conditions in the subsequent verification stage.

[0100] Please refer to Figure 5 , before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the step also includes:

[0101] Step S50, obtaining a transfer function between a preset excitation point and the response test point.

[0102] After the preset excitation points and the response test points are arranged, before the air-conditioning unit is turned on, the transfer function between each preset excitation point and each response test point can be determined in the test phase.

[0103] Optionally, the step of obtaining a transfer function between a preset excitation point and the response test point includes:

[0104] Step S51, tapping the preset excitation point according to a preset test load;

[0105] Step S52, obtaining the test vibration response information of all response test points;

[0106] Step S53: constructing a transfer function between each response point test point and a preset excitation point according to the preset test load and the test vibration response.

[0107] It can be understood that during the test phase before the air-conditioning unit is turned on, a tap is performed at a preset excitation point according to a preset test load. In one embodiment, a vibration exciter can be used to generate vibration excitation, and the sensor measures the test vibration response information at the response test point. According to the preset test load and the test vibration response information, a transfer function between the load of the response test point and the vibration response information of the preset excitation point can be constructed.

[0108] In this embodiment, after the transfer function between each response test point and each preset excitation point is constructed, all transfer functions may be stored.

[0109] After the air-conditioning unit is turned on, the compressor operates and generates vibrations. In the step of establishing a transfer function matrix, the transfer function constructed in the test phase is obtained.

[0110] Third embodiment

[0111] Please refer to Figure 6 This embodiment is based on all the above embodiments, and after the step of determining the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix, it also includes:

[0112] Step S60, verifying the applied load of the preset excitation point, and determining the applied load that meets the preset accuracy as the target load.

[0113] After determining the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix, it is necessary to verify the applied load of the preset excitation point to confirm whether the load identification accuracy is available.

[0114] Optional, please refer to Figure 7 The step of verifying the applied load of the preset excitation point and determining the applied load that meets the preset accuracy as the target load includes:

[0115] Step S61, obtaining vibration response information of a verification point of the compressor, and a transfer function between the verification point and the preset excitation point;

[0116] The step of obtaining the verification point and the preset excitation point comprises:

[0117] Tapping the preset excitation point according to a preset test load;

[0118] Obtain the test vibration response information of all verification points;

[0119] A transfer function between each verification point and a preset excitation point is constructed according to the preset test load and the test vibration response.

[0120] It can be understood that the arrangement of the verification point 3 and the construction of the transfer function between the verification point 3 and the preset excitation point 1 are before the air-conditioning unit is turned on. Therefore, in order to simplify the steps, the transfer function between each verification point and the preset excitation point can be constructed during the test phase while the transfer function between each response test point and the preset excitation point is constructed.

[0121] That is, when the preset excitation point is struck according to the preset test load; the test vibration response information of all verification points and all response test points is obtained;

[0122] According to the preset test load and the test vibration response, a transfer function between each verification point and a preset excitation point is constructed, and at the same time, a transfer function between each verification point and a preset excitation point is constructed.

[0123] Among them, in this embodiment, reference Figure 2 A verification point 3 is arranged at the machine foot 110 of the compressor, and a sensor for detecting vibration response information of the verification point is arranged at the verification point.

[0124] After the air conditioning unit is turned on, the compressor works and the vibration response information of the verification point of the compressor is obtained through the sensor.

[0125] Step S62, calculating and obtaining calculated vibration response information of the verification point according to the transfer function between the verification point and the preset excitation point and the applied load of the preset excitation point;

[0126] Step S63: when the deviation between the calculated vibration response information of the verification point and the vibration response information of the verification point is within a preset range, determining the applied load of the preset excitation point as the target load.

[0127] When the deviation between the calculated vibration response information of the verification point and the vibration response information of the verification point is not within the preset range, it means that the target transfer function matrix determined according to the minimum condition number and the result with the minimum error obtained by the target test point still do not meet the accuracy requirements. At this time, the arrangement of the response test points needs to be rearranged, and then the steps of the load identification method are re-executed until the deviation between the calculated vibration response information of the verification point and the vibration response information of the verification point is within the preset range, and the applied load of the preset excitation point is determined to be the target load.

[0128] It can be understood that this embodiment can ensure the accuracy of the load identification method by verifying the accuracy of the calculated applied load at the preset excitation point, and provide an available target load for subsequent base plate vibration calculation and analysis to ensure the accuracy of the base plate vibration calculation and analysis.

[0129] Optionally, the load identification method further includes:

[0130] While obtaining the vibration response information of all response test points of the compressor when the compressor is working, the vibration response information of the verification point of the compressor is obtained.

[0131] It is understandable that in order to ensure the accuracy of verification in the verification phase, the vibration response information of the verification point obtained by the sensor and the vibration response information of the response test point obtained by the sensor must be data at the same frequency of the compressor.

[0132] In addition, as an implementation method, the hardware environment architecture involved in the base plate vibration calculation method of the air conditioning unit can be as follows: Figure 7 shown.

[0133] The base plate vibration calculation device of the air conditioning unit comprises: a processor 101, such as a CPU, a memory 102, and a communication bus 103. The communication bus 103 is used to realize the connection and communication between these components. The processor 102 is used to call an application program to perform a control operation.

[0134] The memory 102 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory.

[0135] It can be understood that, in one embodiment, the control program for implementing the base plate vibration calculation process of the air conditioning unit is stored in the memory 102 of the load identification device of the compressor, and when the processor 101 calls the control program from the memory 102, the following operations are performed:

[0136] The base plate vibration calculation method comprises the following steps:

[0137] obtaining an applied load at a preset excitation point of the compressor;

[0138] The vibration response information of the base plate is determined according to the applied load of the preset excitation point.

[0139] Based on the hardware architecture of the above-mentioned method for calculating the base plate vibration of the air-conditioning unit, the following embodiments of the present invention are proposed.

[0140] Fourth embodiment

[0141] Please refer to Figure 8 The base plate vibration calculation method proposed in this embodiment includes the following steps:

[0142] Step S70, obtaining the applied load of the preset excitation point of the compressor;

[0143] Step S80: determining the vibration response information of the base plate according to the applied load of the preset excitation point.

[0144] The base plate refers to a plate installed under the air conditioner outdoor unit. Its main function is to stabilize the air conditioner outdoor unit, reduce vibration and noise, and protect the air conditioner outdoor unit from bottom pollution and corrosion.

[0145] It can be understood that after the applied load of the preset excitation point of the compressor is determined by the load identification method of the compressor in the above embodiment, the vibration response information of the bottom plate of the air-conditioning unit can be determined according to the applied load of the preset excitation point to realize the vibration calculation analysis of the bottom plate of the air-conditioning unit. This embodiment adopts all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects brought by all the technical solutions of all the above embodiments, which will not be repeated here one by one.

[0146] Optionally, the step of determining the vibration response information of the base plate according to the applied load of the preset excitation point includes:

[0147] Step S81, establishing a finite element model of the air conditioning unit;

[0148] Step S82: Based on the finite element model, vibration response information of the detection point of the air-conditioning unit is obtained according to the applied load analysis of the preset excitation point.

[0149] By building a simulation analysis model of the air-conditioning unit in the finite element software, the model can be meshed, and material parameters and unit properties can be assigned to the model. In addition, boundary constraints can be imposed on the model by referring to the actual state of the model.

[0150] In this embodiment, a finite element model of the air-conditioning unit is established in combination with the air-conditioning unit structural model, and real material properties are given to each part of the model. The air-conditioning unit modal test is carried out, and measurement points must be arranged above and below the vibration isolators of the air-conditioning unit to obtain the modal results of the air-conditioning unit. The finite element model is corrected according to the test modal to ensure that at least the frequency errors of the first ten modal orders are within the engineering usable range, and the modal vibration shapes are basically consistent.

[0151] When the modified finite element model of the air-conditioning unit is used to calculate and analyze the vibration of the base plate of the air-conditioning unit, the applied load of the preset excitation point is extracted as the input of the finite element model. The vibration response information of the detection point on the air-conditioning unit is used as the output of the finite element model. Among them, the vibration response of the detection point of the base plate is obtained by analyzing the detection point using the harmonic response method.

[0152] Wherein, detection points are arranged on the upper and lower sides of the vibration isolator of the machine foot of the air conditioner unit. It can be understood that arranging detection points on the upper and lower sides of the vibration isolator of the machine foot can improve the accuracy of the bottom plate vibration analysis.

[0153] In addition, an embodiment of the present invention also proposes a load identification device for a compressor, which includes a processor, a memory, and a control program stored in the memory and executable on the processor, and when the control program is executed by the processor, the steps of the load identification method for the compressor as described above are implemented.

[0154] Since all the technical solutions of all the aforementioned embodiments are adopted when this control program is executed by the processor, it has at least all the beneficial effects brought by all the technical solutions of all the aforementioned embodiments, which will not be described one by one here.

[0155] In addition, an embodiment of the present invention also proposes a base plate vibration calculation device for an air-conditioning unit, wherein the base plate vibration calculation device for an air-conditioning unit includes a processor, a memory, and a control program stored in the memory and executable on the processor, and when the control program is executed by the processor, the steps of the base plate vibration calculation method for the air-conditioning unit as described above are implemented.

[0156] Since all the technical solutions of all the aforementioned embodiments are adopted when this control program is executed by the processor, it has at least all the beneficial effects brought by all the technical solutions of all the aforementioned embodiments, which will not be described one by one here.

[0157] In addition, an embodiment of the present invention further proposes a computer-readable storage medium, on which a control program is stored. When the control program is executed by a processor, the various steps of the load identification method described above or the various steps of the base plate vibration calculation method described above are implemented.

[0158] Since all the technical solutions of all the aforementioned embodiments are adopted when this control program is executed by the processor, it has at least all the beneficial effects brought by all the technical solutions of all the aforementioned embodiments, which will not be described one by one here.

[0159] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0160] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0161] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as above, and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, a controlled terminal, or a network device, etc.) to execute the method of each embodiment of the present application.

[0162] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for identifying a load of a compressor, characterized in that: The load identification method comprises the following steps: Obtaining vibration response information of all response test points of the compressor when the compressor is working; Combining the transfer functions between every two response test points and the preset excitation points to form a transfer function matrix, and determining a target transfer function matrix from the transfer function matrix; The applied load of the preset excitation point is determined according to the vibration response information of the target test point and the target transfer function matrix; wherein the target test point is the test point corresponding to the target transfer function matrix.

2. The load identification method according to claim 1, characterized in that: The step of determining a target transfer function matrix from the transfer function matrix comprises: A transfer function matrix with the smallest condition number among all the transfer function matrices is determined as a target transfer function matrix.

3. The load identification method according to claim 2, characterized in that: The step of determining the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix comprises: Decomposing and inverting the determined target transfer function matrix to obtain a target transfer function inverse matrix; The response vibration information of the target test point is multiplied by the inverse matrix of the target transfer function to obtain the applied load of the preset excitation point.

4. The load identification method according to claim 1, characterized in that: The step of obtaining vibration response information of all response test points of the compressor when the compressor is working includes: The acquired vibration response information of all response test points is vibration response information when the compressor operates at a preset frequency.

5. The load identification method according to claim 1, characterized in that: Before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the following step is also included: Two preset excitation points are arranged on the surface of the compressor; wherein a line connecting the two preset excitation points passes through the centroid of the compressor.

6. The load identification method according to claim 1, characterized in that: Before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the following step is also included: At least three response test points are arranged on the surface of the compressor; wherein the upper section, the middle section and the lower section of the compressor surface are respectively arranged with a plurality of response test points arranged at intervals.

7. The load identification method according to claim 1, characterized in that: Before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the following step is also included: A transfer function between a preset excitation point and the response test point is obtained.

8. The load identification method according to claim 7, characterized in that: The step of obtaining the transfer function between the preset excitation point and the response test point comprises: Tapping the preset excitation point according to a preset test load; Obtain the test vibration response information of all response test points; According to the preset test load and the test vibration response, a transfer function between each response point test point and a preset excitation point is constructed.

9. The load identification method according to claim 1, characterized in that: After the step of determining the applied load of the preset excitation point according to the vibration response information of the target test point and the target transfer function matrix, the following step is further included: The applied load of the preset excitation point is verified, and the applied load that meets the preset accuracy is determined as the target load.

10. The load identification method according to claim 9, characterized in that: The step of verifying the applied load of the preset excitation point and determining the applied load that meets the preset accuracy as the target load comprises: Acquiring vibration response information of a verification point of the compressor and a transfer function between the verification point and the preset excitation point; Calculating and obtaining calculated vibration response information of the verification point according to a transfer function between the verification point and the preset excitation point and an applied load of the preset excitation point; When the deviation between the calculated vibration response information of the verification point and the vibration response information of the verification point is within a preset range, the applied load of the preset excitation point is determined to be the target load.

11. The load identification method according to claim 10, characterized in that: The load identification method further includes: While obtaining the vibration response information of all response test points of the compressor when the compressor is working, the vibration response information of the verification point of the compressor is obtained.

12. The load identification method according to claim 8, characterized in that: Before the step of obtaining the vibration response information of all response test points of the compressor when the compressor is working, the following step is also included: Arrange verification points at the feet of the compressor.

13. A method for calculating the vibration of the base plate of an air conditioning unit, characterized in that: The base plate vibration calculation method comprises the following steps: obtaining an applied load at a preset excitation point of the compressor; The vibration response information of the base plate is determined according to the applied load of the preset excitation point.

14. The method for calculating base plate vibration according to claim 13, characterized in that: The step of determining the vibration response information of the base plate according to the applied load of the preset excitation point comprises: Establish finite element model of air conditioning unit; Based on the finite element model, vibration response information of the detection point of the air-conditioning unit is obtained according to the applied load analysis of the acquired preset excitation point.

15. The method for calculating base plate vibration according to claim 14, characterized in that: Before the step of obtaining the applied load of the preset excitation point of the compressor, the following steps are also included: Detection points are arranged on the upper and lower sides of the vibration isolator of the machine foot of the air conditioning unit respectively.

16. A load identification device for a compressor, characterized in that: The load identification device of the compressor includes a processor, a memory, and a control program stored in the memory and executable on the processor. When the control program is executed by the processor, the steps of the load identification method for the compressor as described in any one of claims 1 to 12 are implemented.

17. A device for calculating the vibration of a base plate of an air conditioning unit, characterized in that: The base plate vibration calculation device of the air-conditioning unit includes a processor, a memory, and a control program stored in the memory and executable on the processor. When the control program is executed by the processor, the steps of the base plate vibration calculation method of the air-conditioning unit as described in any one of claims 13-15 are implemented.

18. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a control program, which, when executed by a processor, implements various steps of the load identification method according to any one of claims 1 to 12 or various steps of the base plate vibration calculation method according to any one of claims 13 to 15.

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