CN110544329B - Method and system for judging rail resonance of magnetic-levitation train and storage medium - Google Patents
Method and system for judging rail resonance of magnetic-levitation train and storage medium Download PDFInfo
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- CN110544329B CN110544329B CN201910858724.2A CN201910858724A CN110544329B CN 110544329 B CN110544329 B CN 110544329B CN 201910858724 A CN201910858724 A CN 201910858724A CN 110544329 B CN110544329 B CN 110544329B
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Abstract
The method firstly obtains a time domain gap signal and a time domain acceleration signal of a magnetic suspension control system, obtains a frequency domain signal of the magnetic suspension control system according to the time domain acceleration signal, then judges whether the signals have resonance characteristics from the time domain and the frequency domain respectively, and finally judges the condition according to the resonance characteristics of the signals to realize the judgment of whether the magnetic suspension train generates the track resonance. It can be known from the above flow that the method for determining the rail resonance of the maglev train provided by the embodiment of the present application does not need to rely on the subjective feeling and determination of the driver, and determines whether the time domain signal and the frequency domain signal have the resonance characteristics from the two aspects of the time domain and the frequency domain, thereby achieving the purpose of rapidly and accurately determining whether the rail resonance of the maglev train occurs, and solving the problem that the method for determining whether the rail resonance occurs mainly by the subjective feeling of the driver in the prior art is easy to cause the missing determination and the erroneous determination.
Description
Technical Field
The present application relates to the field of rail vehicle technology, and more particularly, to a method, a system, and a storage medium for determining rail resonance of a magnetic levitation train.
Background
The maglev train is a kind of railway vehicle which uses electromagnetic force to realize non-contact suspension and guidance between train and track and then uses the electromagnetic force generated by motor to draw train running.
With the development and application of medium-low speed maglev trains in recent years, most of the technologies of maglev trains become mature and stable day by day, but as the suspension control system of the maglev train is a system with a limited stability region, under the condition of large interference, the phenomenon of track resonance may occur. The phenomenon of rail resonance can even damage the maglev train and the rails, in addition to reducing the ride comfort of the passengers. Therefore, when the rail resonance occurs, the occurrence of the rail resonance phenomenon should be determined in time, and the suspension control system performs corresponding control processing, so that the negative influence of the rail resonance is minimized.
However, in the running process of the magnetic-levitation train, the judgment of whether the track resonance occurs is mainly realized by the subjective feeling of the driver, namely, the driver feels that the magnetic-levitation train shakes violently or observes the abnormal value of the display interface of the cab to perform resonance judgment, the judgment mode has strong dependence on the subjective feeling of the driver, and the situations of judgment omission and misjudgment are easy to occur.
Disclosure of Invention
In order to solve the technical problems, the application provides a method, a system and a storage medium for judging the rail resonance of a maglev train, so as to solve the problems that in the prior art, the dependence on a driver is too strong and the missed judgment or the erroneous judgment is easy to occur when judging whether the rail resonance occurs or not depending on the subjective feeling of the driver.
In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:
a method for judging the rail resonance of a maglev train comprises the following steps:
acquiring a time domain gap signal and a time domain acceleration signal, wherein the time domain gap signal comprises a plurality of continuously sampled gap sub-signals, and the time domain acceleration signal comprises a plurality of continuously sampled acceleration sub-signals;
acquiring a frequency spectrum distribution diagram according to the time domain acceleration signal;
judging whether the time domain gap signal meets a first resonance condition, if so, determining that the time domain gap signal has a resonance characteristic;
judging whether the time domain acceleration signal meets a second resonance condition, if so, determining that the time domain acceleration signal has a resonance characteristic;
judging whether the spectrum distribution diagram meets a third resonance condition, if so, determining that the spectrum distribution diagram has resonance characteristics;
and judging whether the magnetic-levitation train generates track resonance or not according to the time domain gap signal, the time domain acceleration signal and the resonance characteristic judgment condition of the frequency spectrum distribution diagram.
Optionally, the acquiring the time domain gap signal and the time domain acceleration signal includes:
sampling gap data of a suspension control system of the magnetic-levitation train for a first preset number of times continuously to obtain a plurality of time domain gap signals; the sampling interval of the gap data of the suspension control system is a first preset interval;
sampling acceleration data of the levitation control system for a second preset number of times to obtain a plurality of time domain acceleration signals; and the sampling interval of the gap data of the suspension control system is a second preset interval.
Optionally, the value range of the first preset times is 5 to 20;
the value range of the second preset times is 5-20.
Optionally, the determining whether the time-domain gap signal satisfies a first resonance condition includes:
performing second order differential processing on the time domain gap signal to obtain second order differential values of a plurality of gap sub-signals;
and when the number of the second order differential values of the plurality of gap sub-signals exceeding a first preset threshold value is greater than or equal to a first preset number, judging that the time domain gap signal meets a first resonance condition.
Optionally, a value range of a ratio of the first preset number to the first preset number is 0.4 ± 0.1.
Optionally, the determining whether the time-domain acceleration signal satisfies a second resonance condition includes:
and judging whether the number of the acceleration sub-signals exceeding a second preset threshold value is greater than or equal to a second preset number, and if so, judging that the time domain acceleration signal meets a second resonance condition.
Optionally, a value range of a ratio of the second preset number to the second preset number is 0.4 ± 0.1.
Optionally, the determining whether the spectrum distribution map satisfies a third resonance condition includes:
and judging whether the frequency spectrum value of the frequency spectrum distribution diagram in the preset range exceeds a third preset threshold value, if so, judging that the frequency spectrum distribution diagram meets a third resonance condition.
Optionally, the preset range is 180 ± 10Hz to 220 ± 10 Hz.
A magnetic-levitation train rail resonance judging system comprises:
the time domain signal acquisition module is used for acquiring a time domain gap signal and a time domain acceleration signal, wherein the time domain gap signal comprises a plurality of continuously sampled gap sub-signals, and the time domain acceleration signal comprises a plurality of continuously sampled acceleration sub-signals;
the frequency domain signal acquisition module is used for acquiring a frequency spectrum distribution map according to the time domain acceleration signal;
the first time domain signal judging module is used for judging whether the time domain gap signal meets a first resonance condition or not, and if so, determining that the time domain gap signal has a resonance characteristic;
the second time domain signal judging module is used for judging whether the time domain acceleration signal meets a second resonance condition or not, and if so, determining that the time domain acceleration signal has a resonance characteristic;
the frequency domain signal judging module is used for judging whether the frequency spectrum distribution diagram meets a third resonance condition, and if so, determining that the frequency spectrum distribution diagram has resonance characteristics;
and the resonance judgment module is used for judging whether the magnetic-levitation train generates track resonance or not according to the time domain gap signal, the time domain acceleration signal and the resonance characteristic judgment condition of the frequency spectrum distribution diagram.
Optionally, the time domain signal obtaining module includes:
the gap data unit is used for sampling gap data of a suspension control system of the magnetic-levitation train for a first preset number of times continuously to obtain a plurality of time domain gap signals; the sampling interval of the gap data of the suspension control system is a first preset interval;
the acceleration data unit is used for sampling acceleration data of the levitation control system for a second preset number of times to obtain a plurality of time domain acceleration signals; and the sampling interval of the gap data of the suspension control system is a second preset interval.
Optionally, the value range of the first preset times is 5 to 20;
the value range of the second preset times is 5-20.
Optionally, the first time domain signal determining module determines whether the time domain gap signal meets a first resonance condition, specifically, performs second order differential processing on the time domain gap signal to obtain second order differential values of a plurality of gap sub-signals;
and when the number of the second order differential values of the plurality of gap sub-signals exceeding a first preset threshold value is greater than or equal to a first preset number, judging that the time domain gap signal meets a first resonance condition.
Optionally, a value range of a ratio of the first preset number to the first preset number is 0.4 ± 0.1.
Optionally, the second time domain signal determining module determines whether the time domain acceleration signal meets a second resonance condition, specifically, determines whether the number of the plurality of acceleration sub-signals exceeding a second preset threshold is greater than or equal to a second preset number, and if so, determines that the time domain acceleration signal meets the second resonance condition.
Optionally, a value range of a ratio of the second preset number to the second preset number is 0.4 ± 0.1.
Optionally, the frequency domain signal determining module is specifically configured to determine whether a frequency spectrum value of the frequency spectrum distribution diagram between preset ranges exceeds a third preset threshold, and if so, determine that the frequency spectrum distribution diagram meets a third resonance condition.
Optionally, the preset range is 180 ± 10Hz to 220 ± 10 Hz.
A storage medium having stored thereon a program which, when executed, performs the method for determining magnetic levitation train rail resonance as set forth in any one of the above.
It can be seen from the above technical solutions that the present application provides a method, a system, and a storage medium for determining the rail resonance of a maglev train, wherein the method for determining the rail resonance of a maglev train first obtains a time domain gap signal and a time domain acceleration signal of a maglev control system, obtains a frequency domain signal (i.e., a frequency spectrum distribution diagram) of the maglev control system according to the time domain acceleration signal, then determines whether the signals have resonance characteristics from the time domain and the frequency domain (i.e., determines whether the time domain gap signal satisfies a first resonance condition, whether the time domain acceleration signal satisfies a second resonance condition, and whether the frequency spectrum distribution diagram satisfies a third resonance condition, and finally determines whether the rail resonance of the maglev train occurs according to the resonance characteristics of the signals. It can be known from the above flow that the method for determining the rail resonance of the maglev train provided by the embodiment of the present application does not need to rely on the subjective feeling and determination of the driver, and determines whether the time domain signal and the frequency domain signal have the resonance characteristics from the two aspects of the time domain and the frequency domain, thereby achieving the purpose of rapidly and accurately determining whether the rail resonance of the maglev train occurs, and solving the problem that the method for determining whether the rail resonance occurs mainly by the subjective feeling of the driver in the prior art is easy to cause the missing determination and the erroneous determination.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for determining rail resonance of a magnetic levitation train according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a system for determining rail resonance of a magnetic levitation train according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a method for judging the rail resonance of a maglev train, as shown in fig. 1, the method comprises the following steps:
s101: acquiring a time domain gap signal and a time domain acceleration signal, wherein the time domain gap signal comprises a plurality of continuously sampled gap sub-signals, and the time domain acceleration signal comprises a plurality of continuously sampled acceleration sub-signals;
the time domain gap signal and the time domain acceleration signal can be obtained from a magnetic levitation control system of the magnetic levitation train. Optionally, in an embodiment of the present application, the acquiring a time domain gap signal and a time domain acceleration signal includes:
s1011: sampling gap data of a suspension control system of the magnetic-levitation train for a first preset number of times continuously to obtain a plurality of time domain gap signals; the sampling interval of the gap data of the suspension control system is a first preset interval;
s1012: sampling acceleration data of the levitation control system for a second preset number of times to obtain a plurality of time domain acceleration signals; and the sampling interval of the gap data of the suspension control system is a second preset interval.
Wherein the value range of the first preset times is 5-20;
the value range of the second preset times is 5-20.
For example, the value of the first preset number of times may be specific values such as 5, 10, 15, and 20, and when the value of the first preset number of times is 5, the acquired time-domain gap signals include 5 gap sub-signals acquired at equal sampling intervals.
Similarly, the value of the second preset time may be specific values such as 5, 10, 15, 20, and when the value of the second preset time is 5, the acquired time domain acceleration signal includes 5 acceleration sub-signals acquired at equal sampling intervals.
In this embodiment, the reason that the acquired time-domain gap signal and the time-domain acceleration signal both include multiple sub-signals is that when the rail resonance occurs, the gap data output by the levitation control system is a value fluctuating between 0mm and 20mm, and a single sampled time-domain sub-signal cannot represent the gap fluctuation amplitude, so that multiple times of continuous sampling are required, and the value range of the sampling interval between two adjacent times of sampling may be 25 μ s to 250 μ s.
Similarly, when the rail resonance occurs, the output acceleration data of the suspension control system is-50-50 m/s2The fluctuation value of the acceleration data cannot be represented by a single sampled acceleration sub-signal, so that multiple times of continuous sampling are needed, and the value range of the sampling interval of two adjacent samples can be 25-250 mus.
S102: acquiring a frequency spectrum distribution diagram according to the time domain acceleration signal;
specifically, the spectrum distribution map may be obtained by performing spectrum processing on the time-domain acceleration signal.
S103: judging whether the time domain gap signal meets a first resonance condition, if so, determining that the time domain gap signal has a resonance characteristic;
s104: judging whether the time domain acceleration signal meets a second resonance condition, if so, determining that the time domain acceleration signal has a resonance characteristic;
s105: judging whether the spectrum distribution diagram meets a third resonance condition, if so, determining that the spectrum distribution diagram has resonance characteristics;
s106: and judging whether the magnetic-levitation train generates track resonance or not according to the time domain gap signal, the time domain acceleration signal and the resonance characteristic judgment condition of the frequency spectrum distribution diagram.
In step S106, according to different requirements, determining a specific condition for determining whether the magnetic-levitation train has track resonance according to the resonance characteristic determination condition of the time-domain gap signal, the time-domain acceleration signal, and the frequency spectrum distribution map, for example, when the time-domain gap signal, the time-domain acceleration signal, and the frequency spectrum distribution map all have resonance characteristics, determining that the magnetic-levitation train has track resonance, or when any two or a specific combination of the time-domain gap signal, the time-domain acceleration signal, and the frequency spectrum distribution map has resonance characteristics, determining that the magnetic-levitation train has track resonance; and when any one or a specific one of the time domain gap signal, the time domain acceleration signal and the frequency spectrum distribution diagram has the resonance characteristic, determining that the magnetic-levitation train has rail resonance.
Optionally, when it is determined that the magnetic-levitation train has track resonance, the determination result is timely transmitted to the levitation control system of the magnetic-levitation train for feedback control, so that the levitation control system takes corresponding measures to cope with the track resonance, and the adverse effect of the track resonance on the magnetic-levitation train is reduced.
In this embodiment, the method for determining the rail resonance of the maglev train first obtains a time domain gap signal and a time domain acceleration signal of the maglev control system, obtains a frequency domain signal (i.e., a frequency spectrum distribution diagram) of the maglev control system according to the time domain acceleration signal, then determines whether the signals have resonance characteristics from the time domain and the frequency domain (i.e., determines whether the time domain gap signal satisfies a first resonance condition, whether the time domain acceleration signal satisfies a second resonance condition, and whether the frequency spectrum distribution diagram satisfies a third resonance condition, and finally determines whether the rail resonance of the maglev train occurs according to the resonance characteristics of the signals. It can be known from the above flow that the method for determining the rail resonance of the maglev train provided by the embodiment of the present application does not need to rely on the subjective feeling and determination of the driver, and determines whether the time domain signal and the frequency domain signal have the resonance characteristics from the two aspects of the time domain and the frequency domain, thereby achieving the purpose of rapidly and accurately determining whether the rail resonance of the maglev train occurs, and solving the problem that the method for determining whether the rail resonance occurs mainly by the subjective feeling of the driver in the prior art is easy to cause the missing determination and the erroneous determination.
The following describes feasible determination criteria for determining whether the time-domain gap signal satisfies the first resonance condition, whether the time-domain acceleration signal satisfies the second resonance condition, and whether the spectrum distribution diagram satisfies the third resonance condition.
Specifically, in an embodiment of the present application, the determining whether the time-domain gap signal satisfies a first resonance condition includes:
s1031: performing second order differential processing on the time domain gap signal to obtain second order differential values of a plurality of gap sub-signals;
the purpose of carrying out second-order differential processing on the time domain gap signals is to enable the fluctuation amplitude between the acquired gap sub-signals to be more obvious so as to improve the judgment precision of the first resonance condition.
S1032: and when the number of the second order differential values of the plurality of gap sub-signals exceeding a first preset threshold value is greater than or equal to a first preset number, judging that the time domain gap signal meets a first resonance condition.
Optionally, a value range of a ratio of the first preset number to the first preset number is 0.4 ± 0.1.
For example, when the value range of the first preset number is 5 to 20, the value of the first preset number may be 2 to 8. Specifically, the determination of the first preset number may be a rounding result which is 0.4 times of the first preset number, or a rounding result which is 0.5 times of the first preset number, and the like. The present application does not limit this, which is determined by the actual situation.
In this embodiment, when values of the second order differential values of the plurality of gap sub-signals which exceed 40% -60% all exceed the first preset threshold, the time domain gap signal can be considered to have a resonance characteristic, and can be used as a standard for determining the occurrence of the rail resonance.
In one embodiment of the present application, a feasible value range of the first preset threshold is 12-16 mm.
Accordingly, in another embodiment of the present application, the determining whether the time-domain acceleration signal satisfies the second resonance condition includes:
and judging whether the number of the acceleration sub-signals exceeding a second preset threshold value is greater than or equal to a second preset number, and if so, judging that the time domain acceleration signal meets a second resonance condition.
Optionally, a value range of a ratio of the second preset number to the second preset number is 0.4 ± 0.1.
For example, when the value range of the second preset number is 5 to 20, the value of the second preset number may be 2 to 8. Specifically, the determination of the second preset number may be a rounding result which is 0.4 times of the second preset number, or a rounding result which is 0.5 times of the second preset number, and the like. The present application does not limit this, which is determined by the actual situation.
In this embodiment, when values of the plurality of acceleration sub-signals exceeding 40% to 60% all exceed the second preset threshold, the time-domain acceleration signal may be considered to have a resonance characteristic, and may be used as a criterion for determining occurrence of rail resonance.
Optionally, the selectable value range of the second preset threshold is 20-40m/s2。
In yet another embodiment of the present application, the determining whether the spectrum profile satisfies a third resonance condition includes:
and judging whether the frequency spectrum value of the frequency spectrum distribution diagram in the preset range exceeds a third preset threshold value, if so, judging that the frequency spectrum distribution diagram meets a third resonance condition.
The preset range may be a range in which the energy wave becomes significantly large when the rail resonance occurs, for example, in one embodiment of the present application, the preset range is 180 ± 10Hz to 220 ± 10 Hz.
Specifically, for a certain type of maglev train, when the rail resonance occurs, the frequency spectrum value within the range of 180Hz-220Hz becomes significantly larger, and for the type of maglev train, the preset range is 180Hz-220 Hz. Of course, in other embodiments of the present application, the preset range may also be 190Hz to 230Hz, etc.
The following describes a system for determining the magnetic levitation train rail resonance provided in the embodiment of the present application, and the system for determining the magnetic levitation train rail resonance described below may be referred to in correspondence with the method for determining the magnetic levitation train rail resonance described above.
Correspondingly, an embodiment of the present application provides a system for determining rail resonance of a magnetic levitation train, as shown in fig. 2, including:
a time domain signal obtaining module 10, configured to obtain a time domain gap signal and a time domain acceleration signal, where the time domain gap signal includes a plurality of continuously sampled gap sub-signals, and the time domain acceleration signal includes a plurality of continuously sampled acceleration sub-signals;
a frequency domain signal obtaining module 20, configured to obtain a frequency spectrum distribution map according to the time domain acceleration signal;
a first time domain signal determining module 30, configured to determine whether the time domain gap signal meets a first resonance condition, and if so, determine that the time domain gap signal has a resonance characteristic;
a second time domain signal determining module 40, configured to determine whether the time domain acceleration signal meets a second resonance condition, and if so, determine that the time domain acceleration signal has a resonance characteristic;
a frequency domain signal determining module 50, configured to determine whether the spectrum distribution map meets a third resonance condition, and if so, determine that the spectrum distribution map has a resonance feature;
and the resonance judgment module 60 is configured to judge whether the maglev train has track resonance according to the time domain gap signal, the time domain acceleration signal, and the resonance characteristic judgment condition of the frequency spectrum distribution map.
Optionally, the time domain signal obtaining module 10 includes:
the gap data unit is used for sampling gap data of a suspension control system of the magnetic-levitation train for a first preset number of times continuously to obtain a plurality of time domain gap signals; the sampling interval of the gap data of the suspension control system is a first preset interval;
the acceleration data unit is used for sampling acceleration data of the levitation control system for a second preset number of times to obtain a plurality of time domain acceleration signals; and the sampling interval of the gap data of the suspension control system is a second preset interval.
Optionally, the value range of the first preset times is 5 to 20;
the value range of the second preset times is 5-20.
Optionally, the first time domain signal determining module 30 determines whether the time domain gap signal meets a first resonance condition, specifically, performs second order differential processing on the time domain gap signal to obtain second order differential values of a plurality of gap sub-signals;
and when the number of the second order differential values of the plurality of gap sub-signals exceeding a first preset threshold value is greater than or equal to a first preset number, judging that the time domain gap signal meets a first resonance condition.
Optionally, a value range of a ratio of the first preset number to the first preset number is 0.4 ± 0.1.
Optionally, the second time domain signal determining module 40 determines whether the time domain acceleration signal meets a second resonance condition, specifically, determines whether the number of the plurality of acceleration sub-signals exceeding a second preset threshold is greater than or equal to a second preset number, and if so, determines that the time domain acceleration signal meets the second resonance condition.
Optionally, a value range of a ratio of the second preset number to the second preset number is 0.4 ± 0.1.
Optionally, the frequency domain signal determining module 50 is specifically configured to determine whether a frequency spectrum value of the frequency spectrum distribution diagram between preset ranges exceeds a third preset threshold, and if so, determine that the frequency spectrum distribution diagram meets a third resonance condition.
Optionally, the preset range is 180 ± 10Hz to 220 ± 10 Hz.
Correspondingly, the embodiment of the present application further provides a storage medium, where the storage medium stores a program, and the program is executed to perform the method for determining the rail resonance of the magnetic levitation train according to any one of the above embodiments when the program is executed.
To sum up, the embodiment of the present application provides a method, a system, and a storage medium for determining the rail resonance of a maglev train, wherein the method for determining the rail resonance of a maglev train first obtains a time domain gap signal and a time domain acceleration signal of a maglev control system, obtains a frequency domain signal (i.e., a frequency spectrum distribution diagram) of the maglev control system according to the time domain acceleration signal, then determines whether the signals have resonance characteristics from the time domain and the frequency domain (i.e., determines whether the time domain gap signal satisfies a first resonance condition, whether the time domain acceleration signal satisfies a second resonance condition, and whether the frequency spectrum distribution diagram satisfies a third resonance condition, and finally determines whether the rail resonance of the maglev train occurs according to the resonance characteristics of the signals. It can be known from the above flow that the method for determining the rail resonance of the maglev train provided by the embodiment of the present application does not need to rely on the subjective feeling and determination of the driver, and determines whether the time domain signal and the frequency domain signal have the resonance characteristics from the two aspects of the time domain and the frequency domain, thereby achieving the purpose of rapidly and accurately determining whether the rail resonance of the maglev train occurs, and solving the problem that the method for determining whether the rail resonance occurs mainly by the subjective feeling of the driver in the prior art is easy to cause the missing determination and the erroneous determination.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (17)
1. A method for judging the rail resonance of a maglev train is characterized by comprising the following steps:
acquiring a time domain gap signal and a time domain acceleration signal, wherein the time domain gap signal comprises a plurality of continuously sampled gap sub-signals, and the time domain acceleration signal comprises a plurality of continuously sampled acceleration sub-signals;
wherein the acquiring a time-domain gap signal comprises: sampling gap data of a suspension control system of the magnetic-levitation train for a first preset number of times continuously to obtain a plurality of time domain gap signals; the sampling interval of the gap data of the suspension control system is a first preset interval;
acquiring a frequency spectrum distribution diagram according to the time domain acceleration signal;
judging whether the time domain gap signal meets a first resonance condition, if so, determining that the time domain gap signal has a resonance characteristic;
wherein the determining whether the time domain gap signal satisfies a first resonance condition includes: performing second order differential processing on the time domain gap signal to obtain second order differential values of a plurality of gap sub-signals; when the number of the second order differential values of the plurality of gap sub-signals exceeding a first preset threshold value is greater than or equal to a first preset number, judging that the time domain gap signal meets a first resonance condition;
judging whether the time domain acceleration signal meets a second resonance condition, if so, determining that the time domain acceleration signal has a resonance characteristic;
judging whether the spectrum distribution diagram meets a third resonance condition, if so, determining that the spectrum distribution diagram has resonance characteristics;
and judging whether the magnetic-levitation train generates track resonance or not according to the time domain gap signal, the time domain acceleration signal and the resonance characteristic judgment condition of the frequency spectrum distribution diagram.
2. The method of claim 1, wherein the time domain acceleration signal comprises:
sampling acceleration data of the levitation control system for a second preset number of times to obtain a plurality of time domain acceleration signals; and the sampling interval of the gap data of the suspension control system is a second preset interval.
3. The method according to claim 2, wherein the first predetermined number of times ranges from 5 to 20;
the value range of the second preset times is 5-20.
4. The method according to claim 1, wherein a ratio of the first predetermined number to the first predetermined number is in a range of 0.4 ± 0.1.
5. The method of claim 2, wherein the determining whether the time domain acceleration signal satisfies a second resonance condition comprises:
and judging whether the number of the acceleration sub-signals exceeding a second preset threshold value is greater than or equal to a second preset number, and if so, judging that the time domain acceleration signal meets a second resonance condition.
6. The method according to claim 5, wherein a ratio of the second predetermined number to the second predetermined number is in a range of 0.4 ± 0.1.
7. The method of claim 1, wherein determining whether the spectral profile satisfies a third resonance condition comprises:
and judging whether the frequency spectrum value of the frequency spectrum distribution diagram in the preset range exceeds a third preset threshold value, if so, judging that the frequency spectrum distribution diagram meets a third resonance condition.
8. The method of claim 7, wherein the predetermined range is 180 ± 10Hz to 220 ± 10 Hz.
9. A magnetic-levitation train rail resonance judging system is characterized by comprising:
the time domain signal acquisition module is used for acquiring a time domain gap signal and a time domain acceleration signal, wherein the time domain gap signal comprises a plurality of continuously sampled gap sub-signals, and the time domain acceleration signal comprises a plurality of continuously sampled acceleration sub-signals; wherein the time domain signal acquisition module comprises: the gap data unit is used for sampling gap data of a suspension control system of the magnetic-levitation train for a first preset number of times continuously to obtain a plurality of time domain gap signals; the sampling interval of the gap data of the suspension control system is a first preset interval;
the frequency domain signal acquisition module is used for acquiring a frequency spectrum distribution map according to the time domain acceleration signal;
the first time domain signal judging module is used for judging whether the time domain gap signal meets a first resonance condition or not, and if so, determining that the time domain gap signal has a resonance characteristic; the first time domain signal determination module is used for determining whether the time domain gap signal meets a first resonance condition, and specifically, performing second order differential processing on the time domain gap signal to obtain second order differential values of a plurality of gap sub-signals; when the number of the second order differential values of the plurality of gap sub-signals exceeding a first preset threshold value is greater than or equal to a first preset number, judging that the time domain gap signal meets a first resonance condition;
the second time domain signal judging module is used for judging whether the time domain acceleration signal meets a second resonance condition or not, and if so, determining that the time domain acceleration signal has a resonance characteristic;
the frequency domain signal judging module is used for judging whether the frequency spectrum distribution diagram meets a third resonance condition, and if so, determining that the frequency spectrum distribution diagram has resonance characteristics;
and the resonance judgment module is used for judging whether the magnetic-levitation train generates track resonance or not according to the time domain gap signal, the time domain acceleration signal and the resonance characteristic judgment condition of the frequency spectrum distribution diagram.
10. The system of claim 9, wherein the time domain signal acquisition module further comprises:
the acceleration data unit is used for sampling acceleration data of the levitation control system for a second preset number of times to obtain a plurality of time domain acceleration signals; and the sampling interval of the gap data of the suspension control system is a second preset interval.
11. The system of claim 10, wherein the first predetermined number of times ranges from 5 to 20;
the value range of the second preset times is 5-20.
12. The system of claim 9, wherein a ratio of the first predetermined number to the first predetermined number is in a range of 0.4 ± 0.1.
13. The system according to claim 10, wherein the second time domain signal determining module determines whether the time domain acceleration signal satisfies a second resonance condition, specifically, determines whether the number of the plurality of acceleration sub-signals exceeding a second preset threshold is greater than or equal to a second preset number, and if so, determines that the time domain acceleration signal satisfies the second resonance condition.
14. The system of claim 13, wherein a ratio of the second predetermined number to the second predetermined number is in a range of 0.4 ± 0.1.
15. The system according to claim 9, wherein the frequency domain signal determining module is specifically configured to determine whether a spectral value of the spectral distribution diagram in a spectral range between preset ranges exceeds a third preset threshold, and if so, determine that the spectral distribution diagram satisfies a third resonance condition.
16. The system of claim 15, wherein the predetermined range is 180 ± 10Hz to 220 ± 10 Hz.
17. A storage medium, characterized in that the storage medium has a program stored thereon, and the program is executed to execute the method for determining the magnetic levitation train rail resonance according to any one of claims 1-8.
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