Damping system, method and rail vehicle

Abstract

This invention discloses a vibration reduction system, method, and rail vehicle, relating to the field of rail vehicle technology. The system includes: an acceleration sensor mounted on the vibration-reducing object for collecting vibration signals; a controller circuit communicatively connected to the acceleration sensor for acquiring the instantaneous phase of the ideal damping force corresponding to the vibration signal; and a centrifugal actuator communicatively connected to the controller circuit. The centrifugal actuator controls the rotation of a first motor and a second motor based on the instantaneous phase, thereby driving a first pair of eccentric mass blocks and a second pair of eccentric mass blocks to rotate and output a variable-frequency centrifugal force. This invention utilizes the controller circuit to read the instantaneous phase of the ideal damping force corresponding to the vibration signal in real time, thereby performing variable-frequency control on the centrifugal actuator. This overcomes the limitation of the centrifugal actuator outputting a single-frequency force, enabling vibration reduction for wideband signals, thus achieving active control and vibration reduction of wideband vibrations during rail vehicle operation.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and in particular to a vibration reduction system, method, and rail vehicle. Background Technology

[0002] Currently, rail vehicles generate broadband random vibrations under wheel-rail coupling, exhibiting obvious time-varying characteristics and multi-frequency coupling features. There are three major technical bottlenecks in vibration reduction technology in related technologies: (1) Passive vibration reduction devices (such as rubber stacks and hydraulic dampers) are limited by fixed stiffness or damping parameters, and the attenuation rate of frequency-varying vibration sources is less than 40%, and there is a risk of resonance amplification; (2) Semi-active control systems (such as magnetorheological dampers) can achieve parameter adjustment, but their 200ms-level response delay makes it difficult to track vibration frequency changes above 50Hz; (3) Although traditional centrifugal active actuators can achieve millisecond-level response, they are limited by the actuation principle, and the actuators are only effective for a single preset frequency, with a narrow applicable frequency band.

[0003] Therefore, how to provide an active control vibration reduction system suitable for broadband vibration reduction, breaking through the limitation of the single-frequency force output of traditional centrifugal actuators, and realizing active control vibration reduction of broadband vibration during the operation of rail vehicles is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration reduction system, method, and rail vehicle to overcome the limitation of traditional centrifugal actuators outputting single-frequency force and to achieve active control and vibration reduction of wide-frequency vibrations during rail vehicle operation.

[0005] To solve the above-mentioned technical problems, the present invention provides a vibration reduction system, comprising: An acceleration sensor is installed on the vibration damping object to collect the vibration signal of the vibration damping object; The controller circuit, which is communicatively connected to the acceleration sensor, is used to acquire the instantaneous phase of the ideal damping force corresponding to the vibration signal; wherein, the ideal damping force is the product of the vibration signal and a preset negative gain; A centrifugal actuator communicatively connected to the controller circuit; wherein the centrifugal actuator includes a first motor, a second motor, a first transmission gear set, a second transmission gear set, a first pair of eccentric mass blocks, and a second pair of eccentric mass blocks; the first pair of eccentric mass blocks are connected to the first motor through the first transmission gear set, and the second pair of eccentric mass blocks are connected to the second motor through the second transmission gear set; the centrifugal actuator controls the rotation of the first motor and the second motor according to the instantaneous phase, so as to drive the first pair of eccentric mass blocks and the second pair of eccentric mass blocks to rotate and output variable frequency centrifugal force.

[0006] In another aspect, the controller circuit includes: A negative gain circuit, which is communicatively connected to the acceleration sensor, is used to generate the ideal damping force corresponding to the vibration signal. The controller, which is communicatively connected to the negative gain circuit, is used to analyze the ideal damping force and obtain the instantaneous phase of the ideal damping force.

[0007] On the other hand, the controller circuit also includes: A bandpass filter is used to perform bandpass filtering on the vibration signal to obtain a filtered signal; wherein, the negative gain circuit is communicatively connected to the accelerometer through the bandpass filter to generate the ideal damping force corresponding to the filtered signal; the ideal damping force is the product of the filtered signal and the preset negative gain.

[0008] On the other hand, the controller circuit also includes: A first-in-first-out (FIFO) memory, communicatively connected to the negative gain circuit, is used to store N ideal damping forces; where N is a positive integer greater than or equal to 2; the controller circuit, communicatively connected to the FIFO memory, is used to obtain the instantaneous phase of the last ideal damping force in the FIFO memory when the data in the FIFO memory is updated.

[0009] On the other hand, the centrifugal actuator is disposed on the surface of the vibration damping object.

[0010] On the other hand, the acceleration sensor is disposed on the surface of the vibration damping object, and the acceleration sensor is connected to the controller circuit via wired or wireless means.

[0011] On the other hand, the first pair of eccentric mass blocks and the second pair of eccentric mass blocks have the same structure and are symmetrically arranged inside the housing of the centrifugal actuator.

[0012] On the other hand, the centrifugal actuator further includes a motor controller for generating a first motor control phase and a second motor control phase based on the instantaneous phase, so as to control the phase of the first motor using the first motor control phase and control the phase of the second motor using the second motor control phase; wherein the first motor control phase is the sum of the instantaneous phase and a preset phase, and the second motor control phase is the difference between the instantaneous phase and the preset phase.

[0013] The present invention also provides a vibration reduction method, comprising: The vibration signal of the vibration damping object is acquired by an accelerometer; wherein the accelerometer is mounted on the vibration damping object. Generate the instantaneous phase of the ideal damping force corresponding to the vibration signal; wherein, the ideal damping force is the product of the vibration signal and a preset negative gain; According to the instantaneous phase, the rotation of the first motor and the second motor of the centrifugal actuator is controlled to drive the first pair of eccentric mass blocks and the second pair of eccentric mass blocks to rotate and output variable frequency centrifugal force; wherein, the centrifugal actuator includes the first motor, the second motor, the first transmission gear set, the second transmission gear set, the first pair of eccentric mass blocks and the second pair of eccentric mass blocks; the first pair of eccentric mass blocks are connected to the first motor through the first transmission gear set, and the second pair of eccentric mass blocks are connected to the second motor through the second transmission gear set.

[0014] In addition, the present invention also provides a rail vehicle including the vibration reduction system described above.

[0015] The present invention provides a vibration reduction system comprising: an acceleration sensor disposed on the vibration-reducing object for acquiring vibration signals of the vibration-reducing object; a controller circuit communicatively connected to the acceleration sensor for acquiring the instantaneous phase of the ideal damping force corresponding to the vibration signal; wherein the ideal damping force is the product of the vibration signal and a preset negative gain; and a centrifugal actuator communicatively connected to the controller circuit; wherein the centrifugal actuator includes a first motor, a second motor, a first transmission gear set, a second transmission gear set, a first pair of eccentric mass blocks, and a second pair of eccentric mass blocks; the first pair of eccentric mass blocks are connected to the first motor through the first transmission gear set, and the second pair of eccentric mass blocks are connected to the second motor through the second transmission gear set; the centrifugal actuator controls the rotation of the first motor and the second motor according to the instantaneous phase, so as to drive the first pair of eccentric mass blocks and the second pair of eccentric mass blocks to rotate and output a variable frequency centrifugal force.

[0016] As can be seen, this invention utilizes an accelerometer to collect vibration signals from a vibration source and a controller circuit to read the instantaneous phase of the ideal damping force corresponding to the vibration signal in real time. This allows for frequency conversion control of the centrifugal actuator, overcoming the limitation of the centrifugal actuator outputting a single-frequency force. It enables vibration damping for wideband signals, thereby achieving active control and damping of wideband vibrations during rail vehicle operation. Furthermore, this invention also provides a vibration damping method and a rail vehicle, which also possess the aforementioned beneficial effects. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a structural block diagram of a vibration reduction system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another vibration reduction system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of another vibration reduction system provided in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the principle of signal reading provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the principle of a centrifugal actuator provided in an embodiment of the present invention; Figure 6 This is a flowchart of a vibration reduction method provided in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please refer to Figure 1 , Figure 1 This is a structural block diagram of a vibration reduction system provided in an embodiment of the present invention. The system may include: An accelerometer 201 is installed on the vibration damping object 101 to collect the vibration signal of the vibration damping object 101; The controller circuit 202, which is communicatively connected to the acceleration sensor 201, is used to acquire the instantaneous phase of the ideal damping force corresponding to the vibration signal; wherein, the ideal damping force is the product of the vibration signal and the preset negative gain; A centrifugal actuator 301 is communicatively connected to the controller circuit 202; wherein, the centrifugal actuator 301 includes a first motor, a second motor, a first transmission gear set, a second transmission gear set, a first pair of eccentric mass blocks, and a second pair of eccentric mass blocks; the first pair of eccentric mass blocks is connected to the first motor through the first transmission gear set, and the second pair of eccentric mass blocks is connected to the second motor through the second transmission gear set; the centrifugal actuator 301 controls the rotation of the first motor and the second motor according to the instantaneous phase, so as to drive the first pair of eccentric mass blocks and the second pair of eccentric mass blocks to rotate and output variable frequency centrifugal force.

[0021] It is understood that the acceleration sensor 201 installed on the vibration damping object 101 in this embodiment can be used to collect the acceleration signal (i.e., vibration signal) of the vibration source (i.e., the vibration damping object 101) and input the acceleration signal to the controller circuit 202 for processing. For example, the vibration damping object 101 (such as a traction motor) in a rail vehicle will generate broadband vibration during the high-speed operation of the vehicle. The acceleration sensor 201 can identify the acceleration signal of the vibration damping object 101 and input the acceleration signal to the controller circuit 202 for processing.

[0022] Correspondingly, the specific location of the accelerometer 201 and its communication connection with the controller circuit 202 in this embodiment can be set by the designer according to the practical scenario and user needs. For example, the accelerometer 201 can be placed inside the vibration damping object 101; it can also be placed on the surface of the vibration damping object 101 for easy installation and replacement. The accelerometer 201 can communicate with the controller circuit 202 via wired or wireless means. For example, to reduce wiring, the accelerometer 201 can be wirelessly connected to the controller circuit 202; to ensure real-time signal transmission, the accelerometer 201 can be wired. This embodiment does not impose any restrictions on this.

[0023] In this embodiment, the controller circuit 202 can use the input vibration signal to simulate the corresponding ideal damping force, and process it to obtain the instantaneous phase and instantaneous amplitude of the ideal damping force. Then, it can use the instantaneous phase to control the centrifugal actuator 301 to generate a variable frequency centrifugal force that is opposite to the phase of the vibration signal, which acts on the vibration damping object 101 to achieve the purpose of vibration damping.

[0024] Correspondingly, the specific circuit structure of the controller circuit 202 in this embodiment can be set by the designer according to the practical scenario and user requirements. For example, the controller circuit 202 can be a controller, such as an embedded controller or an industrial control computer. For example, the embedded controller can use the input vibration signal to generate the ideal damping force corresponding to the vibration signal; analyze the ideal damping force to obtain the instantaneous phase of the ideal damping force, and use the instantaneous phase to control the centrifugal actuator 301. For example, the embedded controller can perform a Hilbert transform on the ideal damping force to obtain the instantaneous amplitude and instantaneous phase of the ideal damping force, and then use the instantaneous phase to control the centrifugal actuator 301.

[0025] In other embodiments, the controller circuit 202 can be implemented using hardware circuitry. For example, the controller circuit 202 may include: a negative gain circuit that is communicatively connected to the acceleration sensor 201, used to generate the ideal damping force corresponding to the vibration signal; and a controller (such as a microcontroller) that is communicatively connected to the negative gain circuit, used to analyze the ideal damping force and obtain the instantaneous phase of the ideal damping force.

[0026] Furthermore, such as Figure 2 As shown, to improve accuracy, the controller circuit 202 provided in this embodiment may further include a process for filtering the vibration signal (real-time filtering). For example, the controller circuit 202 may further include: a bandpass filter for bandpass filtering the vibration signal to obtain a filtered signal; wherein, a negative gain circuit is communicatively connected to the accelerometer 201 through the bandpass filter, and is used to generate the ideal damping force corresponding to the filtered signal; the ideal damping force is the product of the filtered signal and a preset negative gain. For example, the bandpass filtering range of the bandpass filter can be the frequency band corresponding to the triangular peak of the vibration spectrum of the vibration damping object 101.

[0027] Correspondingly, when the controller circuit 202 is directly implemented using an embedded controller (or industrial control computer), the vibration signal can first be bandpass filtered to obtain a filtered signal; then the filtered signal can be multiplied by a preset negative gain to simulate the ideal damping force; then the ideal damping force can be analyzed in real time (such as Hilbert transform) to read the instantaneous phase of the ideal damping force, so as to use the instantaneous phase to control the centrifugal actuator 301.

[0028] It should be noted that the specific method by which the controller circuit 202 obtains the instantaneous phase of the ideal damping force corresponding to the vibration signal by analyzing the ideal damping force can be implemented in a way that is the same as or similar to the Hilbert transform method in signal processing in related technologies, such as analyzing the signal ( That is, ideal damping force Perform a Hilbert transform to obtain the imaginary part of the analytic signal. Analyzing signals Analyzing the modulus of the signal For ideal vibration reduction force The instantaneous amplitude, the argument of the analytic signal in the complex plane. For ideal vibration reduction force The instantaneous phase; where, j The imaginary unit, This is the Hilbert transform.

[0029] Furthermore, in order to achieve the ideal vibration reduction force Real-time reading of the amplitude (i.e., instantaneous amplitude) and phase (i.e., instantaneous phase) of the ideal force signal; in this embodiment, a window length N can be set to buffer and update the ideal force signal; such as Figure 4 As shown, a first-in-first-out (FIFO) memory (such as a buffer) is pre-configured to store the sliding window data. , to The N ideal damping forces are acquired sequentially. When reading a new ideal force signal, the sliding window discards the earliest read signal according to the first-in-first-out principle. New data is populated at the end, and the sliding window data is updated accordingly. And so on; each time the sliding window data is updated Perform a Hilbert transform on the data to obtain the instantaneous amplitude and phase of N data points. Only read the instantaneous amplitude and phase of the last data point, which are the instantaneous amplitude and phase of the latest ideal damping force. This allows for the real-time determination of the instantaneous amplitude A and phase of the ideal damping force. Reading, ideal vibration reduction force Its relationship with amplitude and phase is (Formula 1).

[0030] For example, the controller circuit 202 may also include: a first-in-first-out (FIFO) memory communicatively connected to the negative gain circuit for storing N ideal damping forces; where N is a positive integer greater than or equal to 2; the controller circuit 202 is communicatively connected to the FIFO memory for obtaining the instantaneous amplitude and instantaneous phase of the last ideal damping force in the FIFO memory when the data in the FIFO memory is updated.

[0031] It should be noted that the centrifugal actuator 301 in this embodiment (such as...) Figure 2 The variable frequency centrifugal actuator can control the rotation of the first motor and the second motor according to the phase command (such as instantaneous phase) output by the controller circuit 202, so as to drive the first pair of eccentric mass blocks and the second pair of eccentric mass blocks to rotate and output variable frequency centrifugal force; the variable frequency centrifugal force can be opposite to the phase of the vibration signal and act on the vibration reduction object 101 to achieve the purpose of vibration reduction. In addition, this embodiment uses the centrifugal force generated by the centrifugal actuator 301 to reduce vibration, without considering the influence of the support reaction force.

[0032] Correspondingly, the specific structure of the centrifugal actuator 301 in this embodiment can be set by the designer. For example, it can be implemented in a manner similar to or the same as that of centrifugal active actuators in related technologies. For instance, the centrifugal actuator 301 may include two motors (i.e., a first motor and a second motor), two transmission gear sets (i.e., a first transmission gear set and a second transmission gear set), and two pairs of eccentric mass blocks (i.e., a first pair of eccentric mass blocks and a second pair of eccentric mass blocks). For example, the first pair of eccentric mass blocks and the second pair of eccentric mass blocks can adopt the same structure and be symmetrically arranged inside the housing of the centrifugal actuator 301. Figure 5 As shown, a motor (such as the first motor) controls a pair of eccentric mass blocks (such as the first pair of eccentric mass blocks) to rotate in opposite directions at the same speed through a transmission gear set (such as the first transmission gear set) with a transmission ratio of 1:1, thereby generating centrifugal force. (Formula 2), (Formula 3) Since the two rotate in opposite directions at the same speed, the x-direction components of the forces of the two eccentric masses cancel each other out, that is... The component forces in the y-direction of the two eccentric masses combine to form (Formula 4), where (Formula 5); Similarly, another motor (such as the second motor) controls another pair of eccentric mass blocks (such as the second pair of eccentric mass blocks) to rotate in opposite directions at the same speed through another transmission gear set (such as the second transmission gear set), thereby generating centrifugal force. (Formula 6), (Formula 7) Since the two rotate in opposite directions at the same speed, the x-direction components of the forces of the two eccentric masses cancel each other out, that is... The component forces in the y-direction of the two eccentric masses combine to form (Formula 8), where (Formula 9). Wherein, The mass of each eccentric mass block, The rotational speed of the first pair of eccentric mass blocks, For the rotational speed of the second pair of eccentric mass blocks, For preset phase, To give the system the phase of the output force, Let be the eccentricity of the eccentric mass block. Given the first derivative of the phase of the output force of the system with respect to time, This is the first derivative of the preset phase with respect to time.

[0033] The phases of the two motors of the centrifugal actuator 301 are respectively and Phase difference This results in a phase difference between the centrifugal forces output by the two pairs of eccentric mass blocks driven by the two motors. The total centrifugal force output by centrifugal actuator 301 is (Formula 10); Assuming It can be obtained Therefore, the total centrifugal force of the centrifugal actuator 301 can be calculated using trigonometric functions. (Formula 11) The variable frequency centrifugal force generated by the centrifugal actuator 301 With ideal damping force They are equal. Therefore, combining Equations 1 and 11, the ideal force can be read using the Hilbert transformation. instantaneous amplitude With instantaneous phase Centrifugal force at different strain frequencies amplitude and phase This allows for the calculation of the corresponding phases of the two motors. and The two phase commands are input to the two motors for real-time phase tracking, which drives the two pairs of eccentric mass blocks to rotate and output variable frequency centrifugal force, which acts on the vibration reduction object 101 to achieve active vibration reduction.

[0034] Accordingly, the centrifugal actuator 301 also includes a motor controller for adjusting the instantaneous phase ( This generates a first motor control phase and a second motor control phase, so as to control the phase of the first motor using the first motor control phase and control the phase of the second motor using the second motor control phase; wherein, the first motor control phase is an instantaneous phase and a preset phase ( The sum of the two phases, the second motor control phase is the difference between the instantaneous phase and the preset phase.

[0035] Correspondingly, when the controller circuit 202 is directly implemented using an embedded controller (or industrial control computer), the function of the above-mentioned motor controller can be implemented by the embedded controller. That is, the embedded controller can generate a first motor control phase and a second motor control phase according to the instantaneous phase, so as to use the first motor control phase to control the phase of the first motor in the centrifugal actuator 301, and use the second motor control phase to control the phase of the second motor in the centrifugal actuator 301; wherein, the first motor control phase is the sum of the instantaneous phase and the preset phase, and the second motor control phase is the difference between the instantaneous phase and the preset phase.

[0036] The specific location of the centrifugal actuator 301 in this embodiment can be set by the designer according to the practical scenario and user needs. For example, the centrifugal actuator 301 can be placed on the surface of the vibration damping object 101 to reduce installation difficulty and achieve flexible arrangement. For instance, the centrifugal actuator 301 can be fixed to the surface of the vibration damping object 101 by a mounting bracket, and the direction of the variable frequency centrifugal force output by the centrifugal actuator 301 can be parallel to the vibration direction of the vibration damping object 101. Figure 3 As shown, the vibration direction of the vibration damping object 101 and the direction of the variable frequency centrifugal force output by the centrifugal actuator 301 can both be in the vertical direction. The centrifugal actuator 301 can also be located inside the vibration damping object 101; this embodiment does not impose any restrictions on this.

[0037] In this embodiment, the present invention utilizes an acceleration sensor 201 to collect vibration signals from a vibration source and a controller circuit 202 to read the instantaneous phase of the ideal damping force corresponding to the vibration signal in real time, thereby performing frequency conversion control on the centrifugal actuator 301. This overcomes the limitation of the centrifugal actuator 301 outputting a single-frequency force and enables vibration reduction for wideband signals, thereby achieving active control and vibration reduction of wideband vibrations during the operation of rail vehicles.

[0038] Corresponding to the system embodiments above, this invention also provides a vibration reduction method. The vibration reduction method described below and the vibration reduction system described above can be referred to each other.

[0039] Please refer to Figure 6 , Figure 6 A flowchart illustrating a vibration reduction method provided in an embodiment of the present invention. The method may include: Step 11: Acquire the vibration signal of the vibration damping object collected by the accelerometer; wherein, the accelerometer is installed on the vibration damping object.

[0040] It is understood that the method provided in this embodiment can be used with devices that communicate with the accelerometer and centrifugal actuator, such as the aforementioned embedded controller or industrial control computer. The configuration of the accelerometer in this embodiment is similar to that of the accelerometer 201 in the above embodiments, and will not be described again here.

[0041] Step 12: Generate the instantaneous phase of the ideal damping force corresponding to the vibration signal; wherein, the ideal damping force is the product of the vibration signal and the preset negative gain.

[0042] It should be noted that in this step, the acquired vibration signal can be used to simulate the corresponding ideal damping force, and the instantaneous phase and instantaneous amplitude of the ideal damping force can be processed to obtain the instantaneous phase and instantaneous amplitude of the ideal damping force. The centrifugal actuator can then be controlled using the instantaneous phase to generate a variable frequency centrifugal force that is opposite to the phase of the vibration signal, which acts on the object to be damped to achieve the purpose of damping.

[0043] In some embodiments, this step may include: generating an ideal damping force corresponding to the acquired vibration signal; analyzing the ideal damping force to obtain the instantaneous phase of the ideal damping force, so as to use the instantaneous phase to control the centrifugal actuator.

[0044] In some embodiments, generating an ideal damping force corresponding to the acquired vibration signal may include multiplying the filtered signal by a preset negative gain to simulate the ideal damping force.

[0045] In some embodiments, generating an ideal damping force corresponding to the acquired vibration signal may include: performing bandpass filtering on the vibration signal to obtain a filtered signal; and multiplying the filtered signal by a preset negative gain to simulate the ideal damping force.

[0046] In some embodiments, analyzing the ideal damping force to obtain the instantaneous phase of the ideal damping force may include: analyzing the signal ( That is, ideal damping force Perform a Hilbert transform to obtain the imaginary part of the analytic signal. Analyzing signals Analyzing the modulus of the signal For ideal vibration reduction force The instantaneous amplitude, the argument of the analytic signal in the complex plane. For ideal vibration reduction force The instantaneous phase; where, j The imaginary unit, This is the Hilbert transform.

[0047] In some embodiments, parsing the ideal damping force to obtain the instantaneous phase of the ideal damping force may include: when updating the data in the first-in-first-out (FIFO) memory, retrieving and parsing the last ideal damping force from the FIFO memory to obtain the instantaneous phase of the ideal damping force; wherein the FIFO memory is used to store N ideal damping forces; N is a positive integer greater than or equal to 2.

[0048] Step 13: Based on the instantaneous phase, control the rotation of the first motor and the second motor of the centrifugal actuator to drive the first pair of eccentric mass blocks and the second pair of eccentric mass blocks to rotate and output variable frequency centrifugal force.

[0049] The centrifugal actuator includes a first motor, a second motor, a first transmission gear set, a second transmission gear set, a first pair of eccentric mass blocks, and a second pair of eccentric mass blocks; the first pair of eccentric mass blocks is connected to the first motor through the first transmission gear set, and the second pair of eccentric mass blocks is connected to the second motor through the second transmission gear set.

[0050] Correspondingly, the centrifugal actuator in this embodiment is similar to the centrifugal actuator 301 in the above embodiment, and will not be described again here.

[0051] In some embodiments, this step can directly send the instantaneous phase to the centrifugal actuator. For example, the motor controller in the centrifugal actuator can generate a first motor control phase and a second motor control phase based on the instantaneous phase, so as to control the phase of the first motor using the first motor control phase and control the phase of the second motor using the second motor control phase; wherein, the first motor control phase is the sum of the instantaneous phase and the preset phase, and the second motor control phase is the difference between the instantaneous phase and the preset phase.

[0052] In other embodiments, this step can generate a first motor control phase and a second motor control phase based on the instantaneous phase, so as to control the phase of the first motor in the centrifugal actuator 301 using the first motor control phase and control the phase of the second motor in the centrifugal actuator 301 using the second motor control phase; wherein, the first motor control phase is the sum of the instantaneous phase and the preset phase, and the second motor control phase is the difference between the instantaneous phase and the preset phase.

[0053] In this embodiment, the present invention utilizes an accelerometer to collect vibration signals from the vibration source. By reading the instantaneous phase of the ideal damping force corresponding to the vibration signal in real time, the centrifugal actuator can be frequency-controlled, breaking through the limitation of the centrifugal actuator outputting a single-frequency force. It can reduce vibration for wideband signals, thereby realizing active control and vibration reduction of wideband vibration during the operation of rail vehicles.

[0054] Corresponding to the above system embodiments, this invention also provides a rail vehicle. The rail vehicle described below and the vibration reduction system described above can be referred to in correspondence.

[0055] A rail vehicle includes a vibration reduction system as provided in the above embodiments.

[0056] Corresponding to the above method embodiments, this invention also provides a vibration reduction device. The vibration reduction device described below and the vibration reduction method described above can be referred to each other.

[0057] A vibration damping device, comprising: Memory, used to store computer programs; A processor is used to execute a computer program to implement the steps of the vibration reduction method provided in the above-described method embodiments.

[0058] The vibration reduction device provided in this embodiment can be specifically an embedded controller or an industrial control computer.

[0059] Corresponding to the above method embodiments, this invention also provides a computer program product. The computer program product described below can be referred to in correspondence with the vibration reduction method described above.

[0060] A computer program product includes a computer program / instructions that, when executed by a processor, implement the steps of the vibration reduction method provided in the above-described method embodiments.

[0061] Corresponding to the above method embodiments, this invention also provides a computer-readable storage medium. The computer-readable storage medium described below can be referred to in conjunction with the vibration reduction method described above.

[0062] A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the vibration reduction method described in the above method embodiments.

[0063] The computer-readable storage medium can specifically be a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, or any other readable storage medium capable of storing program code.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The methods, devices, rail trains, computer program products, and computer-readable storage media disclosed in the embodiments are described simply because they correspond to the systems disclosed in the embodiments; relevant details can be found in the method section.

[0065] The vibration reduction system, method, and rail vehicle provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of this invention.

Claims

1. A vibration reduction system, characterized in that, include: An acceleration sensor is installed on the vibration damping object to collect the vibration signal of the vibration damping object; The controller circuit, which is communicatively connected to the acceleration sensor, is used to acquire the instantaneous phase of the ideal damping force corresponding to the vibration signal; wherein, the ideal damping force is the product of the vibration signal and a preset negative gain; A centrifugal actuator communicatively connected to the controller circuit; wherein the centrifugal actuator includes a first motor, a second motor, a first transmission gear set, a second transmission gear set, a first pair of eccentric mass blocks, and a second pair of eccentric mass blocks; the first pair of eccentric mass blocks are connected to the first motor through the first transmission gear set, and the second pair of eccentric mass blocks are connected to the second motor through the second transmission gear set; the centrifugal actuator controls the rotation of the first motor and the second motor according to the instantaneous phase, so as to drive the first pair of eccentric mass blocks and the second pair of eccentric mass blocks to rotate and output variable frequency centrifugal force.

2. The vibration reduction system according to claim 1, characterized in that, The controller circuit includes: A negative gain circuit, which is communicatively connected to the acceleration sensor, is used to generate the ideal damping force corresponding to the vibration signal. The controller, which is communicatively connected to the negative gain circuit, is used to analyze the ideal damping force and obtain the instantaneous phase of the ideal damping force.

3. The vibration reduction system according to claim 2, characterized in that, The controller circuit also includes: A bandpass filter is used to perform bandpass filtering on the vibration signal to obtain a filtered signal; wherein, the negative gain circuit is communicatively connected to the accelerometer through the bandpass filter to generate the ideal damping force corresponding to the filtered signal; the ideal damping force is the product of the filtered signal and the preset negative gain.

4. The vibration reduction system according to claim 2, characterized in that, The controller circuit also includes: A first-in-first-out (FIFO) memory, communicatively connected to the negative gain circuit, is used to store N ideal damping forces; where N is a positive integer greater than or equal to 2; the controller circuit, communicatively connected to the FIFO memory, is used to obtain the instantaneous phase of the last ideal damping force in the FIFO memory when the data in the FIFO memory is updated.

5. The vibration reduction system according to claim 1, characterized in that, The centrifugal actuator is disposed on the surface of the vibration damping object.

6. The vibration reduction system according to claim 1, characterized in that, The acceleration sensor is disposed on the surface of the vibration damping object, and the acceleration sensor is connected to the controller circuit via wired or wireless means.

7. The vibration reduction system according to claim 1, characterized in that, The first pair of eccentric mass blocks has the same structure as the second pair of eccentric mass blocks and is symmetrically arranged inside the housing of the centrifugal actuator.

8. The vibration reduction system according to any one of claims 1 to 7, characterized in that, The centrifugal actuator further includes a motor controller, which generates a first motor control phase and a second motor control phase based on the instantaneous phase, so as to control the phase of the first motor using the first motor control phase and control the phase of the second motor using the second motor control phase; wherein, the first motor control phase is the sum of the instantaneous phase and a preset phase, and the second motor control phase is the difference between the instantaneous phase and the preset phase.

9. A vibration reduction method, characterized in that, include: The vibration signal of the vibration damping object is acquired by an accelerometer; wherein the accelerometer is mounted on the vibration damping object. Generate the instantaneous phase of the ideal damping force corresponding to the vibration signal; wherein, the ideal damping force is the product of the vibration signal and a preset negative gain; According to the instantaneous phase, the rotation of the first motor and the second motor of the centrifugal actuator is controlled to drive the first pair of eccentric mass blocks and the second pair of eccentric mass blocks to rotate and output variable frequency centrifugal force; wherein, the centrifugal actuator includes the first motor, the second motor, the first transmission gear set, the second transmission gear set, the first pair of eccentric mass blocks and the second pair of eccentric mass blocks; the first pair of eccentric mass blocks are connected to the first motor through the first transmission gear set, and the second pair of eccentric mass blocks are connected to the second motor through the second transmission gear set.

10. A rail vehicle, characterized in that, Includes the vibration reduction system as described in any one of claims 1 to 8.

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