CN104898640A - Levitation controller fault diagnosis method - Google Patents
Levitation controller fault diagnosis method Download PDFInfo
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- CN104898640A CN104898640A CN201510163147.7A CN201510163147A CN104898640A CN 104898640 A CN104898640 A CN 104898640A CN 201510163147 A CN201510163147 A CN 201510163147A CN 104898640 A CN104898640 A CN 104898640A
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- suspension controller
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- diagnosing faults
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0224—Process history based detection method, e.g. whereby history implies the availability of large amounts of data
- G05B23/0227—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions
- G05B23/0237—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions based on parallel systems, e.g. comparing signals produced at the same time by same type systems and detect faulty ones by noticing differences among their responses
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a levitation controller fault diagnosis method comprising the following steps: a clock source sends a life signal to levitation controllers on a cycle of preset time; each levitation controller binds real-time status information thereof with the life signal to obtain first information, and returns the first information to the clock source; the clock source binds the first information with the system time to obtain second information; when a fault occurs, operation process intermediate variables of the levitation controllers in a preset number of operation cycles before and after the occurrence of the fault are stored in a fault recording unit; and when the network is idle, the operation process intermediate variables are called from the fault recording unit and combined with the second information to diagnose the fault. By adopting the method, information about each levitation controller can be displayed in detail, and the sequence of faults can be identified. Therefore, the diagnosis of levitation controllers is more precise and accurate, and the reliability of maglev trains is improved.
Description
Technical field
The present invention relates to magnetic suspension train technical field, particularly relate to a kind of suspension controller method for diagnosing faults.
Background technology
Middle low speed magnetic suspension train is a kind of novel track vehicle, compared to traditional wheel-rail train, it belongs to the transportation system of power distribute type, and namely often saving vehicle is all motor-car, and therefore the bottom part of train is furnished with more electrical equipment, simultaneously, the running mechanism design of magnetic suspension train is unique, and device structure is comparatively complicated, and electrical specification is various, and relate to forceful electric power and strong magnetic, there is very strong coupling between equipment.Suspension control system is as one of the core system of magnetic suspension train, and carry the suspension function of whole vehicle, its stability and reliability are the important guarantees that train normally runs.Often save on magnetic-levitation train at present and have 20 suspension controllers, One's name is legion and be distributed in vehicle various piece, therefore to optimize and the fault diagnosis technology that improves suspension control system seems particularly important.In prior art, fault diagnosis technology for middle low speed magnetic suspension train is mainly concentrated and is carried out fault diagnosis to whole vehicle, the equipment such as traction invertor, subordinate inverter, suspended power supply, suspension controller, door control system are coupled to net, and send the status information of equipment to display, when device fails, prompting driver takes appropriate measures.
But, there are two subject matters in fault diagnosis technology of the prior art: one, the just rough information showing each parts in whole Vehicular system, do not show the status information of each parts of suspension control system inside in detail, and these detailed information are absolutely necessary to the state of assessment suspension system operation and performance; They are two years old, the sequencing that when can not occur multipoint fault, each trouble spot occurs is distinguished, when vehicle suspension is run, because two reference mark that homonymy in same suspension rack is adjacent are couplings, the state of a control of a point can have an impact to another point, therefore when multiple point breaks down simultaneously, these points break down and have time order and function relation, and this time order and function relation and status information are at that time important information concerning debugging and assessment.
Summary of the invention
For solving the problem, the invention provides a kind of suspension controller method for diagnosing faults, the information of each suspension controller can not only be shown in detail, and can the sequencing that each trouble spot occurs be distinguished, thus make the diagnosis of suspension controller more meticulous and accurate, and then improve the reliability of magnetic suspension train.
A kind of suspension controller method for diagnosing faults provided by the invention comprises:
Clock source take Preset Time as the cycle, sends life signal to suspension controller;
Respective real time status information and described life signal are bundled into the first information by suspension controller, return to described clock source;
The described first information is combined with system time by described clock source, obtains the second information;
When an error occurs, the calculating process intermediate variable that the described suspension controller in the execution cycle of the predetermined number of front and back fault is occurred is kept in failure logging unit;
When network idle, from described failure logging unit, transfer described calculating process intermediate variable and carry out tracing trouble in conjunction with described second information.
Preferably, in above-mentioned suspension controller method for diagnosing faults, the calculating process intermediate variable of the described suspension controller in the execution cycle of the predetermined number before and after fault being occurred first is kept in temporary data storage unit, after vehicle landing, more described calculating process intermediate variable is kept in failure logging unit.
Preferably, in above-mentioned suspension controller method for diagnosing faults, described temporary data storage unit is DSP chip inside or outside random access memory.
Preferably, in above-mentioned suspension controller method for diagnosing faults, the basis of design of described predetermined number is: the data storage capacity of described failure logging unit and the data class of described calculating process intermediate variable.
Preferably, in above-mentioned suspension controller method for diagnosing faults, described failure logging unit is band EEPROM (Electrically Erasable Programmable Read Only Memo).
Preferably, in above-mentioned suspension controller method for diagnosing faults, described clock source is Vehicular display device.
Preferably, in above-mentioned suspension controller method for diagnosing faults, after described Vehicular display device obtains described second information, also comprise:
Described second information is carried out log recording and shown.
Preferably, in above-mentioned suspension controller method for diagnosing faults, described real time status information comprises: failure code, fault rank and association status information in the same time.
Preferably, in above-mentioned suspension controller method for diagnosing faults, described Preset Time is the arbitrary numerical value between 50 milliseconds to 1 second.
Known by foregoing description, in a kind of suspension controller method for diagnosing faults provided by the invention, clock source take Preset Time as the cycle, life signal is sent to suspension controller, respective real time status information and described life signal are bundled into the first information by suspension controller, return to described clock source; The described first information is combined with system time by described clock source, obtains the second information, so just can carry out more accurate record to the real time status information of each suspension controller, thus just can distinguish accurately the sequencing that each trouble spot occurs; When an error occurs, the calculating process intermediate variable that the described suspension controller in the execution cycle of the predetermined number of front and back fault is occurred is kept in failure logging unit; When network idle, from described failure logging unit, transfer described calculating process intermediate variable and carry out tracing trouble in conjunction with described second information, the calculating process intermediate variable of the suspension controller before and after so just occurring fault carries out record, for looking up the fault reason provides important reference, and in conjunction with have recorded described second information of real time status information of each suspension controller, to diagnosing malfunction, thus make the diagnosis of suspension controller more meticulous and accurate, and then improve the reliability of magnetic suspension train.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The process flow diagram of a kind of suspension controller method for diagnosing faults that Fig. 1 provides for the embodiment of the present application;
Fig. 2 is the schematic diagram of suspension controller used in the embodiment of the present application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of suspension controller method for diagnosing faults that the embodiment of the present application provides as shown in Figure 1, the process flow diagram of a kind of suspension controller method for diagnosing faults that Fig. 1 provides for the embodiment of the present application.The method comprises:
S1: clock source take Preset Time as the cycle, sends life signal to suspension controller;
In this step, described clock source can be preferably Vehicular display device.Because CAN is regardless of principal and subordinate, each node on network can communication mutually, therefore needs from all nodes, to take out a node as clock source, carrys out the time of all nodes on Unified Network, thus could the sequencing of failure judgement point.But the node on network only has the Vehicular display device on magnetic suspension train to have system time writing function, and final failure message need be shown by display, therefore clock source is preferably Vehicular display device.
On the other hand, because the time that Vehicular display device records can only be accurate to second, but the time order and function that suspension controller breaks down order can reach Millisecond, therefore the order of fault generation simply well can not be told with timing second, this just makes the diagnosis of fault enough inaccurate, and therefore the embodiment of the present application adopts the mode sending life signal to solve the problems referred to above.Described life signal is the data of a real-time update, normal in order to the equipment on characterizing network and other device talks, if life signal is long-time static constant, then tentatively can judges that this equipment breaks down, or occur network communication fault.Described life signal carries out continuing to send with the fixing cycle, for the choosing of Preset Time in this cycle, if the cycle is too short, then data volume is too large, easily causes network congestion, if the cycle is oversize, then Data Update obtains too slow, considers above-mentioned two aspect factors, described Preset Time is preferably the arbitrary numerical value between 50 milliseconds to 1 second, this addresses the problem the problem that the temporal resolution of Vehicular display device is low, the sequencing that each fault occurs can better be differentiated.
S2: respective real time status information and described life signal are bundled into the first information by suspension controller, return to described clock source;
In this step, after each suspension controller on train receives the life signal that clock source sends over, respective real time status information and this life signal are bundled, the object done like this is: with more precise time resolution, distinguish the real-time status of each suspension controller within the shorter time cycle, thus once break down, just can better distinguish which suspension controller and break down formerly, which breaks down rear.It should be noted that in addition, described real time status information can preferably comprise: failure code, fault rank and association status information in the same time, these information concerning fault handling and after sale personnel safeguard be necessary.
S3: the described first information is combined with system time by described clock source, obtains the second information;
In this step, the described first information parses by described clock source, and together with system time, obtain the second information, accurately to record the various status informations of suspension controller, the numerical value at that time of the life signal namely returned with suspension controller for suffix, distinguishing more accurately as time order and function.Such as, present system time is: 2014-04-23 10:50:25, and now life signal value is 05, then in described second information time interocclusal record form be: 2014-04-23 10:50:25-05.
Described clock source can be preferably Vehicular display device, after described Vehicular display device obtains described second information, can also preferably comprise: described second information is carried out log recording and shown, thus convenient prompting driver processes rapidly and personnel safeguard and debugging after sale.
S4: when an error occurs, the calculating process intermediate variable of the described suspension controller in the execution cycle of the predetermined number before and after fault being occurred is kept in failure logging unit;
Intermediate variable in control algolithm calculating process and parameter to the control performance of assessment suspension controller and looking up the fault reason significant, therefore need to carry out record to it.But, because digital signal processor completes the computing of a control algolithm within the extremely short time cycle, and whole CAN network there are 20 suspension controllers, the controller of One's name is legion just can produce googol according to amount in extremely short execution cycle, therefore can not the be real-time intermediate quantity of each for all controllers computing be uploaded, therefore a failure logging unit is set, the calculating process intermediate variable of the described suspension controller in the execution cycle of the predetermined number before and after only occurring fault is preserved, so just can more accurate looking up the fault reason.
A preferred version of this step is: when an error occurs, the calculating process intermediate variable of the described suspension controller in the execution cycle of the predetermined number before and after fault being occurred first is kept in temporary data storage unit, after vehicle landing, again described calculating process intermediate variable is kept in failure logging unit, wherein, described temporary data storage unit can be preferably the inner or outside random access memory (RAM) of DSP chip.
S5: when network idle, transfers described calculating process intermediate variable and carrys out tracing trouble in conjunction with described second information from described failure logging unit.
Below with reference to Fig. 2, more specific detail is carried out to the embodiment of the present application, Fig. 2 is the schematic diagram of suspension controller used in the embodiment of the present application, as can be seen from Fig. 2, the suspension controller utilized in the suspension controller method for diagnosing faults that the embodiment of the present application provides adds a failure logging unit 1 relative to prior art, in the suspension controller course of work, when a failure occurs it, intermediate variable in the execution cycle of predetermined number before and after fault and parameter can preferably first be kept in temporary data storage unit by digital signal processor, described temporary data storage unit can be preferably inside or the external RAM district of chip, after vehicle landing, again described calculating process intermediate variable is kept in failure logging unit 1.
Wherein it should be noted that, the basis of design of described predetermined number is: the data storage capacity of described failure logging unit and the data class of described calculating process intermediate variable.If the size of the storage space of failure logging unit is 500 data, and need the data class preserved to be two: gap and electric current, so just can preserve the data in each 125 execution cycles before and after fault, if and the data class that need preserve has 10, the data in each 25 cycles before and after fault so just can only be preserved.When practical application, usually preserve the data before and after fault in 10 to 100 execution cycles.Above-mentioned failure logging unit 1 preferably can be with EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM), and this equipment can preserve data under powering-off state.
Known by foregoing description, in a kind of suspension controller method for diagnosing faults that the embodiment of the present application provides, clock source take Preset Time as the cycle, life signal is sent to suspension controller, respective real time status information and described life signal are bundled into the first information by suspension controller, return to described clock source; The described first information is combined with system time by described clock source, obtains the second information, so just can carry out more accurate record to the real time status information of each suspension controller, thus just can distinguish accurately the sequencing that each trouble spot occurs; When an error occurs, the calculating process intermediate variable that the described suspension controller in the execution cycle of the predetermined number of front and back fault is occurred is kept in failure logging unit; When network idle, from described failure logging unit, transfer described calculating process intermediate variable and carry out tracing trouble in conjunction with described second information, the calculating process intermediate variable of the suspension controller before and after so just occurring fault carries out record, for looking up the fault reason provides important reference, and in conjunction with have recorded described second information of real time status information of each suspension controller, to diagnosing malfunction, thus make the diagnosis of suspension controller more meticulous and accurate, and then improve the reliability of magnetic suspension train.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a suspension controller method for diagnosing faults, is characterized in that, comprising:
Life signal is sent to multiple suspension controller;
The real time status information of respective each time point and described multiple life signal bundle by described multiple suspension controller, form many first information, be combined by the described first information corresponding with system time, obtain the second information with system time;
When an error occurs, the calculating process intermediate variable that the described suspension controller in the execution cycle of the predetermined number of front and back fault is occurred is kept in failure logging unit;
When network idle, from described failure logging unit, transfer described calculating process intermediate variable and carry out tracing trouble in conjunction with described second information.
2. suspension controller method for diagnosing faults according to claim 1, it is characterized in that, the calculating process intermediate variable of the described suspension controller in the execution cycle of the predetermined number before and after fault being occurred first is kept in temporary data storage unit, after vehicle landing, more described calculating process intermediate variable is kept in failure logging unit.
3. suspension controller method for diagnosing faults according to claim 2, is characterized in that, described temporary data storage unit is DSP chip inside or outside random access memory.
4. suspension controller method for diagnosing faults according to claim 2, is characterized in that, the basis of design of described predetermined number is: the data storage capacity of described failure logging unit and the data class of described calculating process intermediate variable.
5. suspension controller method for diagnosing faults according to claim 1, is characterized in that, described failure logging unit is band EEPROM (Electrically Erasable Programmable Read Only Memo).
6. the suspension controller method for diagnosing faults according to any one of claim 1-5, is characterized in that, described clock source is Vehicular display device.
7. suspension controller method for diagnosing faults according to claim 6, is characterized in that, after described Vehicular display device obtains described second information, also comprises:
Described second information is carried out log recording and shown.
8. the suspension controller method for diagnosing faults according to any one of claim 1-5, is characterized in that, described real time status information comprises: failure code, fault rank and association status information in the same time.
9. suspension controller method for diagnosing faults according to claim 1, is characterized in that, described Preset Time is the arbitrary numerical value between 50 milliseconds to 1 second.
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| CN105966422A (en) * | 2016-05-30 | 2016-09-28 | 株洲中车时代电气股份有限公司 | Control method for preventing rail vehicle breakage caused by communication failures |
| CN108170115A (en) * | 2017-11-23 | 2018-06-15 | 中冶南方（武汉）自动化有限公司 | Electric machine controller fault data recorder and access method and system |
| CN108762118A (en) * | 2018-05-24 | 2018-11-06 | 哈工大机器人（合肥）国际创新研究院 | Fault handling method and device between a kind of communication apparatus |
| CN110187206A (en) * | 2019-05-22 | 2019-08-30 | 中国人民解放军国防科技大学 | Fault detection method for suspension system in non-Gaussian process under complex working condition |
| CN110597222A (en) * | 2019-08-20 | 2019-12-20 | 中车青岛四方机车车辆股份有限公司 | Fault diagnosis system and fault diagnosis method |
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