Rotor system with resonance point self-test function, measurement method, equipment and medium

Abstract

The invention discloses a rotor system with a resonance point self-test function, a measurement method, equipment and a medium. The system comprises a controller, an active electromagnetic bearing, a radial vibration displacement sensor and a spectrum analyzer, the controller is used for generating a control signal according to the user configuration parameters and sending the control signal to the active electromagnetic bearing; the active electromagnetic bearing is used for outputting electromagnetic excitation force to the rotor system according to the control signal, so that the rotor system generates radial vibration displacement under the action of the electromagnetic excitation force; the radial vibration displacement sensor is used for collecting a radial vibration displacement signal of the rotor system and sending the radial vibration displacement signal to the spectrum analyzer; and the spectrum analyzer is used for generating a spectrum signal according to the radial vibration displacement signal and determining a rotor resonance point according to the spectrum signal. According to the technical scheme, self-testing of the resonance point of the rotor system can be realized without a speed increasing and decreasing test and an additional excitation device, the safety of the rotor is guaranteed, and uncontrollable accidents are avoided.

Description

Technical Field

[0001] The present invention relates to the field of vibration testing technology, and in particular to a rotor system, a measuring method, a device and a medium with a resonance point self-test function. Background Art

[0002] The rotor is the core part of rotating machinery. For high-speed rotating machinery, especially high-speed rotating machinery that needs to operate beyond the critical speed of the rotor, special attention should be paid to the information of its rotor resonance point. The resonance point of the rotor is the point at the critical speed corresponding to the peak value of the vibration response of the rotor system during operation. After determining the rotor resonance point, the critical speed of the rotor can be determined.

[0003] At the beginning of the design, the rotor system must undergo strict rotor dynamics calculations, and its dynamic characteristics data such as critical speed and vibration mode must be obtained through simulation analysis. In the actual application of the rotor system, the actual critical speed of the rotor system also needs to be experimentally verified.

[0004] In the prior art, it is often necessary to determine the critical speed in actual applications through speed-up and speed-down experiments. When there is a deviation in the critical speed obtained by simulation, it may not be possible to ensure that the rotor system safely passes the critical speed, and the high amplitude of resonance cannot be effectively controlled, which seriously threatens the safety of newly built rotating machinery. Summary of the invention

[0005] The present invention provides a rotor system, a measurement method, a device and a medium with a resonance point self-test function, which can realize the rotor system resonance point self-test without speed increase or decrease test and without additional excitation device, thereby ensuring the rotor safety and avoiding uncontrollable accidents.

[0006] According to one aspect of the present invention, there is provided a rotor system with a resonance point self-test function, comprising a controller, an active electromagnetic bearing, a radial vibration displacement sensor and a spectrum analyzer;

[0007] The controller is used to generate a control signal according to user configuration parameters and send the control signal to the active electromagnetic bearing;

[0008] The active electromagnetic bearing is used to output electromagnetic excitation force to the rotor system according to the control signal, so that the rotor system generates radial vibration displacement due to the electromagnetic excitation force;

[0009] The radial vibration displacement sensor is used to collect the radial vibration displacement signal of the rotor system and send the radial vibration displacement signal to the spectrum analyzer;

[0010] The spectrum analyzer is used to generate a spectrum signal according to the radial vibration displacement signal, and determine the rotor resonance point according to the spectrum signal.

[0011] According to another aspect of the present invention, a rotor resonance point measurement method is provided, which is performed by a spectrum analyzer in a rotor system with a resonance point self-test function according to any embodiment of the present invention, and comprises:

[0012] Acquire a radial vibration displacement signal sent by a radial vibration displacement sensor in the rotor system, and perform frequency domain transformation on the radial vibration displacement signal to generate a frequency spectrum signal of the radial vibration displacement;

[0013] Determine the spectrum amplitude and the spectrum frequency value at each time point according to the spectrum signal;

[0014] According to the spectrum amplitude and the spectrum frequency value at each time point, the maximum value of the spectrum amplitude is determined, and the spectrum frequency value corresponding to the maximum value of the spectrum amplitude is determined as the rotor resonance point;

[0015] Wherein, the rotor system generates radial vibration displacement after being subjected to the electromagnetic exciting force sent by the active electromagnetic bearing in the rotor system.

[0016] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0017] at least one processor; and

[0018] a memory communicatively connected to the at least one processor; wherein,

[0019] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the rotor resonance point measurement method described in any embodiment of the present invention.

[0020] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the rotor resonance point measurement method described in any embodiment of the present invention when executed.

[0021] The technical solution of the embodiment of the present invention is to configure a controller, an active electromagnetic bearing, a radial vibration displacement sensor and a spectrum analyzer in a rotor system with a resonance point self-test function, wherein the controller is used to generate a control signal according to user configuration parameters and send the control signal to the active electromagnetic bearing, the active electromagnetic bearing is used to output an electromagnetic exciting force to the rotor system according to the control signal, the radial vibration displacement sensor is used to collect the radial vibration displacement signal of the rotor system and send the radial vibration displacement signal to the spectrum analyzer, the spectrum analyzer is used to generate a spectrum signal according to the radial vibration displacement signal, and determine the rotor resonance point according to the spectrum signal, thereby proposing a rotor system capable of realizing resonance point self-test, and the rotor system can realize rotor system resonance point self-test without the need for speed increase or decrease test and without additional excitation device, thereby ensuring rotor safety and avoiding uncontrollable accidents.

[0022] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 these drawings without creative work.

[0024] Figure 1 is a structural schematic diagram of a rotor system with a resonance point self-test function provided according to Embodiment 1 of the present invention;

[0025] Figure 2 is a flow chart of a rotor resonance point measurement method provided according to Embodiment 2 of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of an electronic device for implementing the rotor resonance point measurement method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment 1

[0030] Figure 1 This is a schematic diagram of the structure of a rotor system with a resonance point self-test function provided in the first embodiment of the present invention. Figure 1 As shown, the rotor system with the resonance point self-test function includes a controller 110 , an active electromagnetic bearing 120 , a radial vibration displacement sensor 130 and a spectrum analyzer 140 .

[0031] The controller 110 is used to generate a control signal according to user configuration parameters and send the control signal to the active electromagnetic bearing 120 .

[0032] The active electromagnetic bearing 120 is used to output electromagnetic excitation force to the rotor system according to the control signal, so that the rotor system generates radial vibration displacement due to the electromagnetic excitation force.

[0033] The radial vibration displacement sensor 130 is used to collect the radial vibration displacement signal of the rotor system and send the radial vibration displacement signal to the spectrum analyzer 140 .

[0034] The spectrum analyzer 140 is used to generate a spectrum signal according to the radial vibration displacement signal, and determine the rotor resonance point according to the spectrum signal.

[0035] The controller 110 , the active electromagnetic bearing 120 , the radial vibration displacement sensor 130 and the spectrum analyzer 140 together constitute a resonance point self-test subsystem in the rotor system.

[0036] like Figure 1 As shown, the rotor system with the resonance point self-test function also includes: a rotating shaft 150 , a centrifugal drum 160 and a rolling bearing 170 .

[0037] It is understandable that in order to achieve the critical speed of the rotor system in actual applications, it is necessary to obtain the critical point of the rotor system in actual applications. In order to avoid the safety problems that may be caused by the speed increase and decrease experiments, it is necessary to conduct non-destructive or low-loss experimental tests on the newly built rotating machinery. In the existing non-destructive or low-loss experimental tests, external excitation is often applied to the rotor system to measure the response data of the rotor system. There is no rotor system in the prior art that can realize the self-test function of the rotor resonance point.

[0038] The rotating shaft 150 is connected to the centrifugal drum 160 , and the rotor part of the rolling bearing 170 and the rotor part of the active electromagnetic bearing 120 are respectively connected to the rotating shaft 150 .

[0039] The rotating shaft 150 is used to drive the centrifugal drum 160 to perform process operations when rotating.

[0040] The rolling bearing 170 and the active electromagnetic bearing 120 are used to support the rotor system.

[0041] Optionally, in the rotor system, the rotating shaft 150 is directly connected to the centrifugal drum 160, and the rotating shaft 150 is cooperatively connected with the rolling bearing 170 and the rotor part of the active electromagnetic bearing 120. The rolling bearing 170 and the rotor part of the active electromagnetic bearing 120 cooperate with the rotating shaft 150 and rotate with the rotating shaft 150. The stator part of the rolling bearing 170 and the active electromagnetic bearing 120 is connected to the system foundation of the rotor system; the rolling bearing 170 and the active electromagnetic bearing 150 jointly support the rotor system.

[0042] The user configuration parameters may include amplitude, phase, frequency step, start frequency and end frequency.

[0043] The controller 110 may be specifically used for:

[0044] According to the user configuration parameters and the control signal generation formula, a control signal is generated, and the control signal is sent to the active electromagnetic bearing; wherein the control signal generation formula is:

[0045] ;

[0046] Among them, u(t) is the control signal, A is the amplitude, B is the phase, C is the frequency step, S is the starting frequency, E is the ending frequency, and t is the time variable.

[0047] Optionally, the user configuration parameters are configuration values ​​sent by the user to the controller 110. The amplitude can determine the size of the electromagnetic excitation force output by the active electromagnetic bearing; the phase determines the initial phase angle of the electromagnetic excitation force output by the active electromagnetic bearing; the frequency step determines the growth rate of the electromagnetic excitation force frequency from the starting frequency to the ending frequency; the starting frequency defines the lower limit of the electromagnetic excitation frequency; the ending frequency defines the upper limit of the electromagnetic excitation frequency, but the influence of the above parameters on the electromagnetic excitation force still needs to be specifically analyzed in combination with the gain coefficient k.

[0048] The controller 110 and the active electromagnetic bearing 120 perform data transmission via a signal line.

[0049] The active electromagnetic bearing 120 can be specifically used for:

[0050] According to the control signal sent by the controller and the electromagnetic excitation force generation formula, an electromagnetic excitation force is generated, and the electromagnetic excitation force is applied to the rotor system; wherein the electromagnetic excitation force generation formula is:

[0051] ;

[0052] Wherein, f(t) is the electromagnetic excitation force, k is the gain coefficient, u(t) is the control signal sent by the controller, and t is a time variable, which may refer to the time point when the active electromagnetic bearing 120 sends the electromagnetic excitation force to the rotor system each time.

[0053] Optionally, the gain coefficient k is a constant, and the size of the gain coefficient is determined by the active electromagnetic bearing 120 itself.

[0054] The radial vibration displacement sensor 130 is a non-contact rotor vibration displacement measuring device. The radial vibration displacement sensor 130 is not directly connected to the rotating shaft 150 . The radial vibration displacement sensor 130 and the spectrum analyzer 140 perform data transmission via a signal line.

[0055] Optionally, when the electronic excitation force is applied to the rotor system, the rotor system is stimulated by the electromagnetic excitation force to generate rotor vibration displacement, and the radial vibration displacement sensor 130 collects the radial vibration displacement signal of the rotor system in a non-contact manner and sends the radial vibration displacement signal to the spectrum analyzer 140.

[0056] The spectrum analyzer 140 may be specifically used for:

[0057] Performing frequency domain transformation on the radial vibration displacement signal sent by the radial vibration displacement sensor to generate a spectrum signal of the radial vibration displacement, and determining the spectrum amplitude and spectrum frequency value at each time point according to the spectrum signal;

[0058] According to the spectrum amplitude and the spectrum frequency value at each time point, the maximum value of the spectrum amplitude is determined, and the spectrum frequency value corresponding to the maximum value of the spectrum amplitude is determined as the rotor resonance point.

[0059] Optionally, after receiving the radial vibration displacement signal z(t), the spectrum analyzer 140 performs frequency domain transformation on the radial vibration displacement signal z(t) to generate a spectrum signal Z(w, a, t) of the radial vibration displacement, wherein w is the spectrum frequency value, a is the spectrum amplitude, and t is each time point in the radial vibration displacement signal.

[0060] Optionally, the spectrum signal includes spectrum amplitudes and spectrum frequency values ​​at each time point, and the rotor resonance point is equal to the spectrum frequency value w corresponding to when the spectrum amplitude a reaches a maximum value.

[0061] Optionally, after determining the rotor resonance point, the user can determine the critical speed of the rotor system based on the rotor resonance point. The above-mentioned rotor system can perform self-test of the resonance point without external excitation, and during the measurement process, there is no need to perform speed increase or decrease experiments on the rotor system, thereby ensuring the safe operation of the rotor system.

[0062] Optionally, the spectrum analyzer 140 is further used to: display the spectrum signal and the rotor resonance point information; wherein the rotor resonance point information includes the spectrum frequency value of the rotor resonance point in the spectrum signal and the corresponding spectrum amplitude.

[0063] The technical solution of the embodiment of the present invention is to configure a controller, an active electromagnetic bearing, a radial vibration displacement sensor and a spectrum analyzer in a rotor system with a resonance point self-test function, wherein the controller is used to generate a control signal according to user configuration parameters and send the control signal to the active electromagnetic bearing, the active electromagnetic bearing is used to output an electromagnetic exciting force to the rotor system according to the control signal, the radial vibration displacement sensor is used to collect the radial vibration displacement signal of the rotor system and send the radial vibration displacement signal to the spectrum analyzer, the spectrum analyzer is used to generate a spectrum signal according to the radial vibration displacement signal, and determine the rotor resonance point according to the spectrum signal, thereby proposing a rotor system capable of realizing resonance point self-test, and the rotor system can realize rotor system resonance point self-test without the need for speed increase or decrease test and without additional excitation device, thereby ensuring rotor safety and avoiding uncontrollable accidents.

[0064] Embodiment 2

[0065] Figure 2This is a flow chart of a rotor resonance point measurement method provided in the second embodiment of the present invention. This embodiment can be applied to the case where the resonance point of a rotor system is determined based on the radial vibration displacement signal of the rotor system. The method can be performed by a rotor resonance point measurement device. The rotor resonance point measurement device can be implemented in the form of hardware and / or software, and can generally be configured in a spectrum analyzer with data processing function. The spectrum analyzer can be included in a rotor system with a resonance point self-test function. Figure 2 As shown, the method includes:

[0066] S210: Acquire a radial vibration displacement signal sent by a radial vibration displacement sensor in the rotor system, and perform frequency domain transformation on the radial vibration displacement signal to generate a frequency spectrum signal of the radial vibration displacement.

[0067] S220: Determine the spectrum amplitude and spectrum frequency value at each time point according to the spectrum signal.

[0068] S230, determining the maximum value of the spectrum amplitude according to the spectrum amplitude and the spectrum frequency value at each time point, and determining the spectrum frequency value corresponding to the maximum value of the spectrum amplitude as the rotor resonance point.

[0069] Wherein, the rotor system generates radial vibration displacement after being subjected to the electromagnetic exciting force sent by the active electromagnetic bearing in the rotor system.

[0070] Optionally, the rotor resonance point measurement device may include:

[0071] A spectrum signal generating module, used for acquiring a radial vibration displacement signal sent by a radial vibration displacement sensor in a rotor system, and performing frequency domain transformation on the radial vibration displacement signal to generate a spectrum signal of radial vibration displacement;

[0072] A spectrum data acquisition module, used to determine the spectrum amplitude and spectrum frequency value at each time point according to the spectrum signal;

[0073] The rotor resonance point determination module is used to determine the maximum value of the spectrum amplitude according to the spectrum amplitude and spectrum frequency value at each time point, and determine the spectrum frequency value corresponding to the maximum value of the spectrum amplitude as the rotor resonance point.

[0074] Wherein, the rotor system generates radial vibration displacement after being subjected to the electromagnetic exciting force sent by the active electromagnetic bearing in the rotor system.

[0075] The technical solution of the embodiment of the present invention obtains the radial vibration displacement signal sent by the radial vibration displacement sensor in the rotor system, performs frequency domain transformation on the radial vibration displacement signal, generates a spectrum signal of the radial vibration displacement, determines the spectrum amplitude and spectrum frequency value at each time point according to the spectrum signal, determines the maximum value of the spectrum amplitude according to the spectrum amplitude and spectrum frequency value at each time point, and determines the spectrum frequency value corresponding to the maximum value of the spectrum amplitude as the rotor resonance point. This method can determine the resonance point of the rotor through the radial vibration displacement of the rotor system itself, without the need to realize the resonance point measurement through speed increase and decrease experimental data, thereby ensuring the safety of the rotor system during the resonance point measurement process.

[0076] Embodiment 3

[0077] Figure 3 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0078] like Figure 3 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a ROM 12 (read-only memory), a RAM 13 (random access memory), etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the ROM 12 or the computer program loaded from the storage unit 18 to the RAM 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. The I / O interface 15 is also connected to the bus 14.

[0079] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0080] The processor 11 may be any general and / or dedicated processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the rotor resonance point measurement method described in an embodiment of the present invention, that is:

[0081] Acquire a radial vibration displacement signal sent by a radial vibration displacement sensor in the rotor system, and perform frequency domain transformation on the radial vibration displacement signal to generate a frequency spectrum signal of the radial vibration displacement;

[0082] Determine the spectrum amplitude and the spectrum frequency value at each time point according to the spectrum signal;

[0083] According to the spectrum amplitude and the spectrum frequency value at each time point, the maximum value of the spectrum amplitude is determined, and the spectrum frequency value corresponding to the maximum value of the spectrum amplitude is determined as the rotor resonance point;

[0084] Wherein, the rotor system generates radial vibration displacement after being subjected to the electromagnetic exciting force sent by the active electromagnetic bearing in the rotor system.

[0085] In some embodiments, the rotor resonance point measurement method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the rotor resonance point measurement method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the rotor resonance point measurement method in any other appropriate manner (e.g., by means of firmware).

[0086] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0087] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0088] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0089] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0090] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0091] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0092] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0093] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotor system with a resonance point self-test function, characterized in that: It includes a controller, an active electromagnetic bearing, a radial vibration displacement sensor and a spectrum analyzer; The controller is used to generate a control signal according to user configuration parameters and send the control signal to the active electromagnetic bearing; The active electromagnetic bearing is used to output electromagnetic excitation force to the rotor system according to the control signal, so that the rotor system generates radial vibration displacement due to the electromagnetic excitation force; The radial vibration displacement sensor is used to collect the radial vibration displacement signal of the rotor system and send the radial vibration displacement signal to the spectrum analyzer; The spectrum analyzer is used to generate a spectrum signal according to the radial vibration displacement signal, and determine the rotor resonance point according to the spectrum signal.

2. The system according to claim 1, characterized in that The controller, active electromagnetic bearing, radial vibration displacement sensor and spectrum analyzer together constitute a resonance point self-test subsystem in the rotor system; The rotor system also includes: a rotating shaft, a centrifugal drum and a rolling bearing.

3. The system according to claim 1, characterized in that The user configuration parameters include amplitude, phase, frequency step, start frequency and end frequency; The controller is specifically used for: According to the user configuration parameters and the control signal generation formula, a control signal is generated, and the control signal is sent to the active electromagnetic bearing; wherein the control signal generation formula is: ； Among them, u(t) is the control signal, A is the amplitude, B is the phase, C is the frequency step, S is the starting frequency, E is the ending frequency, and t is the time variable.

4. The system according to claim 1, characterized in that The controller and the active electromagnetic bearing perform data transmission via a signal line; The active electromagnetic bearing is specifically used for: According to the control signal sent by the controller and the electromagnetic excitation force generation formula, an electromagnetic excitation force is generated, and the electromagnetic excitation force is applied to the rotor system; wherein the electromagnetic excitation force generation formula is: ； Wherein, f(t) is the electromagnetic excitation force, k is the gain coefficient, u(t) is the control signal sent by the controller, and t is the time variable.

5. The system according to claim 2, characterized in that The radial vibration displacement sensor is a non-contact rotor vibration displacement measuring device. The radial vibration displacement sensor is not directly connected to the rotating shaft. The radial vibration displacement sensor and the spectrum analyzer perform data transmission via a signal line.

6. The system according to claim 1, characterized in that The spectrum analyzer is specifically used for: Performing frequency domain transformation on the radial vibration displacement signal sent by the radial vibration displacement sensor to generate a spectrum signal of the radial vibration displacement, and determining the spectrum amplitude and spectrum frequency value at each time point according to the spectrum signal; According to the spectrum amplitude and the spectrum frequency value at each time point, the maximum value of the spectrum amplitude is determined, and the spectrum frequency value corresponding to the maximum value of the spectrum amplitude is determined as the rotor resonance point.

7. The system according to claim 2, characterized in that The rotating shaft is connected to the centrifugal drum, and the rotor part of the rolling bearing and the rotor part of the active electromagnetic bearing are respectively connected to the rotating shaft in cooperation; The rotating shaft is used to drive the centrifugal drum to perform process operations when rotating; The rolling bearing and the active electromagnetic bearing are used to support the rotor system.

8. A rotor resonance point measurement method, characterized in that: The method is performed by a spectrum analyzer in a rotor system with a resonance point self-test function according to any one of claims 1 to 7, comprising: Acquire a radial vibration displacement signal sent by a radial vibration displacement sensor in the rotor system, and perform frequency domain transformation on the radial vibration displacement signal to generate a frequency spectrum signal of the radial vibration displacement; Determine the spectrum amplitude and the spectrum frequency value at each time point according to the spectrum signal; According to the spectrum amplitude and the spectrum frequency value at each time point, the maximum value of the spectrum amplitude is determined, and the spectrum frequency value corresponding to the maximum value of the spectrum amplitude is determined as the rotor resonance point; Wherein, the rotor system generates radial vibration displacement after being subjected to the electromagnetic exciting force sent by the active electromagnetic bearing in the rotor system.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor. The computer program is executed by the at least one processor so that the at least one processor can perform the rotor resonance point measurement method according to claim 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the rotor resonance point measurement method according to claim 8 when executed.

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