CN108958166A - A kind of numerically-controlled machine tool turret fault diagnosis system based on paste H net node igniting and backward reasoning method - Google Patents
A kind of numerically-controlled machine tool turret fault diagnosis system based on paste H net node igniting and backward reasoning method Download PDFInfo
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- CN108958166A CN108958166A CN201710397203.2A CN201710397203A CN108958166A CN 108958166 A CN108958166 A CN 108958166A CN 201710397203 A CN201710397203 A CN 201710397203A CN 108958166 A CN108958166 A CN 108958166A
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 22
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- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
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- 238000001514 detection method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 208000033748 Device issues Diseases 0.000 description 2
- 208000010086 Hypertelorism Diseases 0.000 description 2
- 206010020771 Hypertelorism of orbit Diseases 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
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- 238000012882 sequential analysis Methods 0.000 description 1
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Classifications
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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
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
- G05B19/4065—Monitoring tool breakage, life or condition
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37616—Use same monitoring tools to monitor tool and workpiece
Abstract
The present invention relates to the numerically-controlled machine tool turret fault diagnosis systems of a kind of paste H net node igniting and backward reasoning method, belong to fault diagnosis technology field, it include: arm processor (101), translation circuit (102), velocity sensor (103), pressure sensor (104), position sensor (105), power supply (106), keyboard (107), light-emitting diode display (108), phonetic alarm (109) and numerically-controlled machine tool turret (110) composition, it is characterized in that, based on ARM embedded system, fault diagnosis is carried out to numerically-controlled machine tool turret using the node igniting of FUZZY H NETS and reverse Reasoning Algorithm Based.Provided numerically-controlled machine tool turret fault diagnosis system according to the present invention has achieved the effect that quick, easy, intelligence and accurate detection and diagnosis numerically-controlled machine tool turret failure.The system can be widely used in fault diagnosis field, have broad application prospects.
Description
Technical field
The present invention relates to fault diagnosis technologies, and relate more specifically to a kind of based on the igniting of paste H net node and reverse push
The numerically-controlled machine tool turret fault diagnosis system of reason method.
Background technique
Numerically-controlled machine tool is that usable floor area is most wide in manufacturing industry, the highest basis of dosage is set as manufacturing machine-tool
It is standby.Show that the country of China numerically-controlled machine tool ownership has reached 20,000,000 or so in 2016 according to related data, and with China's work
Industry manufacturing industry is just entering an important transitional period, and ownership is also by further expansion.Numerically-controlled machine tool is to pass through process control
The equipment of processing any portion of failure and is lost this requires its each moment in real-time control all works like clockwork
Effect can all be such that lathe shuts down and influence production, not only replace component and incur great expense, but also shut down to influence to produce and bring
Economic loss it is even more serious.
Numerically-controlled machine tool may be implemented automatic operation, reduce due to using control core of the digital control system as lathe
The labor intensity of machine operation personnel, while can also and precision very high machine components extremely complex with machining shape.And
Digital control system makes numerical control using advanced computer technology, microelectric technique, servo control technique and automatic control technology
Lathe realize it is mechanical, electrical, liquid integrated, it is technologically advanced, constitute complicated, there is very strong function, but also make the event of numerically-controlled machine tool
Barrier rate is more much higher than the failure rate of machine tool, and maintenance difficulty also increases very much.When a failure occurs, although digital control system has
Standby various diagnostic functions, Machine Manufacture factory is also that lathe critical component devises diagnostic function, but rapidly and accurately to diagnose simultaneously
Debugging, still there is certain difficulty.This personnel of needing repairing has the analysis ability of superb technical level and synthesis.It is special
It is not when a failure occurs that system diagnostics function cannot play a role, diagnoses fault frequently more complicated.
Fault of numerical control machine tool mode influences and critical analysis can be learnt according to numerically-controlled machine tool field failure data
The multiple position of numerically-controlled machine tool is mainly turret.And turret break down after criticality highest, be influence number
Control the critical component of the reliability of lathe.Ensure the normal operation of numerically-controlled machine tool turret, that is, ensures numerically-controlled machine tool
It operates normally.When numerically-controlled machine tool turret breaks down, needs quick, accurate, intelligent fault location and be diagnosed to be
Failure cause is debugged in the shortest possible time.Therefore, in view of the current country in numerically-controlled machine tool turret fault diagnosis system
Present on limitation and owe maturation, for the operation for ensuring numerically-controlled machine tool energy more normal, thus the present invention propose it is a kind of embedding based on ARM
The Novel numerical control machine turret fault diagnosis system of embedded system, so as to can quickly, simplicity, intelligence, accurate detection and
Numerically-controlled machine tool turret failure is diagnosed, the time that maintenance personal searches failure cause is effectively reduced, facilitates them quickly
Determine maintenance policy, it is ensured that the normal operation of numerically-controlled machine tool.
Summary of the invention
The present invention relates to a kind of numerically-controlled machine tool turret failures based on the igniting of paste H net node and backward reasoning method to examine
Disconnected system, incorporating signal processing techniques and sensor technology, are improved using FUZZY H network method to numerically-controlled machine tool turret failure
Real-time modeling set and the ability quickly analyzed, and using Linux as operating system platform, it is based on 9 processor of ARM, by embedded system
It is introduced into traditional fault diagnosis field, to improve the practicability and intelligence of fault diagnosis system, completes on-line fault diagnosis.
The features such as this system has fault diagnosis quick and precisely, high degree of automation, intelligent is suitable for the event of numerically-controlled machine tool turret
Hinder automatic quick diagnosis.
Numerically-controlled machine tool turret is chosen as research object, according to its structure and feature, with Fault Tree Analysis, with
Knife rest failure is fault tree top event, and the immediate cause event such as knife rest motor that analysis causes this top event to occur is nonreversible, locks
Clamp force not enough, knife rest internal corrosion and knife rest cross position, it is then former for each first layer as the first layer failure cause of fault tree
Because event continues fault source tracing, sequential analysis, until finding all reason events for causing each event of failure to occur, then
Each reason event is indicated respectively with elementary event symbol according to result event, finally accords with all events by logic gate
It number is sequentially connected, is finally completed the foundation of knife rest fault tree.Using this fault tree as foundation, the event of numerically-controlled machine tool turret is established
The FUZZY H NETS fault diagnosis model of barrier, and write program with the igniting of the node of FUZZY H NETS and reverse Reasoning Algorithm Based and be written
In embedded system.
Technical solution is: after numerically-controlled machine tool turret breaks down, fault diagnosis system passes through velocity sensor
It measures the revolving speed of knife rest motor and is converted into electric signal, pressure sensor is used to measure the coupling mechanism force of knife rest and is converted into telecommunications
Number, the position of position sensor measurement knife rest is simultaneously converted into electric signal, converts digital quantity for analog quantity using translation circuit group
And be sent into arm processor, using keyboard carry out failure diagnostic process in initial marking value input, and carry out various function keys and
The processing of number key, the comprehensive various input information of arm processor carry out the reasoning of FUZZY H NETS Intelligent fault, by fault diagnosis knot
Fruit real-time display on light-emitting diode display comes out, and for truly having failure to occur, arm processor exports alarm signal, audio alert
Device issues audio alert.
The invention patent has the beneficial effect that a kind of numerically-controlled machine tool based on paste H net node igniting and backward reasoning method
Turret fault diagnosis system, the system are based on ARM embedded system and utilize the knot of FUZZY H NETS according to FUZZY H pessimistic concurrency control
Point igniting and reverse Reasoning Algorithm Based can simple, quick, accurately orient the abort situation and reason of numerically-controlled machine tool, failure
The features such as diagnosis has quick and precisely, high degree of automation, intelligent, diagnosis process is simpler, more efficient.
By in conjunction with the following drawings, after the detailed description for reading the invention patent embodiment, other features of the invention,
Features and advantages will become apparent.
Detailed description of the invention
Fig. 1 is a kind of Novel numerical control machine turret fault diagnosis based on ARM embedded system of the invention patent
The structural schematic diagram of system；
Fig. 2 is a kind of Novel numerical control machine turret fault diagnosis based on ARM embedded system of the invention patent
The FUZZY H NETS node ignition algorithm figure of system；
Fig. 3 is the numerically-controlled machine tool turret FUZZY H NETS fault diagnosis model figure of the invention patent；
Fig. 4 is a kind of Novel numerical control machine turret fault diagnosis based on ARM embedded system of the invention patent
The FUZZY H NETS fault diagnosis algorithm flow chart of system.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.
Fig. 1 is a kind of Novel numerical control machine turret fault diagnosis based on ARM embedded system of the invention patent
System structure diagram.
It include: arm processor (101), translation circuit (102), velocity sensor (103), pressure sensor (104), position
Sensor (105), power supply (106), keyboard (107), light-emitting diode display (108), phonetic alarm (109) and numerically-controlled machine tool is set to turn
Tower knife rest (110) composition, which is characterized in that numerically-controlled machine tool turret fault diagnosis system is an Intelligence Diagnosis system,
Arm processor (101) respectively with translation circuit (102), power supply (106), keyboard (107), light-emitting diode display (108), voice reporting
Alert device (109) are connected, translation circuit (102) respectively with velocity sensor (103), pressure sensor (104) and position sensing
Device (105) is connected, and three sensors are connected with numerically-controlled machine tool turret (110), specifically, velocity sensor (103)
It is connected with knife rest motor, pressure sensor (104) and position sensor (105) are connected with knife rest；
Arm processor (101) carries out information exchange and communication for each component, and caller carries out fault diagnosis；
Translation circuit (102), is made of analog-digital converter (ADC), can be used for fault diagnosis for analog quantity to be converted into
Digital quantity；
Velocity sensor (103), for measuring the revolving speed of knife rest motor and being converted into electric signal；
Pressure sensor (104), for measuring the coupling mechanism force of knife rest and being converted into electric signal；
Position sensor (105), for measuring the position of knife rest and being converted into electric signal；
Power supply (106), for powering to whole system；
Keyboard (107) for the input of numerically-controlled machine tool turret FUZZY H NETS fault model initial marking value, and carries out
The processing of various function keys and number key；
Light-emitting diode display (108), for carrying out the display of fault diagnosis result；
Phonetic alarm (109), the audio alert for failure；
Numerically-controlled machine tool turret (110) refers to the constituent element of numerically-controlled machine tool turret, including knife rest motor and knife
Frame.
Technical solution is: after numerically-controlled machine tool turret breaks down, fault diagnosis system passes through velocity sensor
It measures the revolving speed of knife rest motor and is converted into electric signal, pressure sensor is used to measure the coupling mechanism force of knife rest and is converted into telecommunications
Number, the position of position sensor measurement knife rest is simultaneously converted into electric signal, converts digital quantity for analog quantity using translation circuit group
And be sent into arm processor, using keyboard carry out failure diagnostic process in initial marking value input, and carry out various function keys and
The processing of number key, the comprehensive various input information of arm processor carry out the reasoning of FUZZY H NETS Intelligent fault, by fault diagnosis knot
Fruit real-time display on light-emitting diode display comes out, and for truly having failure to occur, arm processor exports alarm signal, audio alert
Device issues audio alert.
Fig. 2 is a kind of Novel numerical control machine turret fault diagnosis system based on ARM embedded system of patent of invention
The FUZZY H NETS node ignition algorithm figure of system.
It is a large amount of not true in large-scale and complicated device system (such as numerically-controlled machine tool turret system) in order to describe
Determine information, Fuzzy Production Rule can be introduced into the representation of knowledge of fault diagnosis.First the information fuzzy of system, so
Afterwards to the premise part application fuzzy operation of rule, the reasoning for mentioning conclusion in the past is the consolidated statement acted on produced by strictly all rules
It is existing, finally accurate result is obtained using fuzzy relation.A rule can all be regarded between any two neighborhood of nodes of FUZZY H NETS as
Then, input node and output node are considered as the premise proposition and conclusion proposition of rule.As shown in Fig. 2, being used for numerically-controlled machine tool
The FUZZY H NETS regular expression of turret fault diagnosis are as follows:
IF d1 OR d2 OR d3 THEN d4(CF=ui, i=1,2,3) and (1)
In formula (1), d1、d2And d3It is premise proposition, d4It is conclusion proposition, the value of each proposition is between 0 to 1, ui
∈ [0,1] indicates the confidence level of rule.p1、p2、p3And p4It is nodal set, wherein p1、p2、p3It is input node, p4It is output knot
Point.α(p1)、α(p2)、α(p3) and α (p4) respectively indicate proposition d1、d2、d3And d4True value, also referred to as ident value, if proposition
It is primitive proposition, then its ident value is known as initial marking value.
λ ∈ [0,1] indicates the ignition threshold value of rule, and α (p) indicates the ident value of proposition, therefore, for Fig. 2:
In step 201, fuzzy rule node is not lighted a fire also, simply by the presence of α (pi) > λi(1≤i≤3), node can points
Fire；
In step 202, fuzzy rule igniting is finished, and calculates the ident value of next node.A 3 output node if it exists
Ident value α (pi) > λi, and the confidence level of rule is respectively u1、u2、u3, then the ident value of new node are as follows:
In the node that these can light a fire, if α (pk)·ukFor maximum value (1≤k≤3), then explanation is node pkPoint
Fire.
According to numerically-controlled machine tool turret fault tree, numerically-controlled machine tool turret FUZZY H NETS fault diagnosis model is established.
Fig. 3 is the numerically-controlled machine tool turret FUZZY H NETS fault diagnosis model figure of the invention patent.
Wherein, each proposition collection is respectively as follows: p1: wiring error；p2: contactor is bad；p3: phase sequence mistake；p4: pre- indexing sensing
Device is bad；p5: pre- indexing sensor hypertelorism；p6: the relay for controlling positioning is bad；p7: the relay type selecting for controlling positioning is wrong
Accidentally；p8: it is not attracted caused by voltage is low；p9: band-type brake voltage instability；p10: band-type brake connecting line is disconnected；p11: the tight relay of control brake
It is bad；p12: the tight relay type selecting mistake of control brake；p13: brake strip does not work；p14: lock sensor hypertelorism；
p15: lock sensor undertension 24V；p16: lock sensor is bad；p17: position is improper to break sensor；p18: encoder is bad；
p19: encoder shifting block loosens；p20: main shaft back of the body cap loosens；p21: lubricating oil is filled not in time； p22: control sequential is not right；p23:
The contactor of controller reversion does not work；p24: pre- indexing sensor no signal output；p25: pre- indexing electromagnet failure；p26: electricity
Mechanism is moved bad；p27: lock sensor no signal；p28: encoder fault；p29: knife rest motor is nonreversible；p30: coupling mechanism force is not
It is enough；p31: knife rest internal corrosion；p32: knife rest crosses position；p33: turret failure.λ1~λ32Respectively indicate numerically-controlled machine tool capstan head knife
The ignition threshold value of this 32 rule in frame FUZZY H NETS fault diagnosis model
Fig. 4 is a kind of Novel numerical control machine turret fault diagnosis based on ARM embedded system of the invention patent
The FUZZY H NETS fault diagnosis algorithm flow chart of system.
According to numerically-controlled machine tool turret FUZZY H NETS fault diagnosis model, establish each node node reachable set (RS),
Node reachable set (IRS), node reversely reachable set (RIRS) and adjacent bonds point set (AP) immediately immediately, and in all nodes
Only initial node or input node just have initial marking value, and ident value is true according to the methods of expertise and historical data
It is fixed.It needs to establish set U and set V in reasoning process.Also, define the collection being made of destination node or final node
It closes, referred to as destination node collection (GP)；
FUZZY H NETS fault diagnosis algorithm process is as follows:
In step 401, start；
In step 402, according to numerically-controlled machine tool turret failure find it corresponding to node proposition pi, and input diagnosis
Node pi；
In step 403, p is judgediWhether GP is belonged to, ifStep 411 is jumped to, i.e. process terminates；If node pi∈
GP continues step 404；
In step 404, by node piIt is put into set V；
In step 405, a node is arbitrarily selected from set V；
In step 406, the antecedent node of the node selected in step 405 is found out, and according to antecedent node number, judges class
Type discusses in the following several ways:
1) in step 407, if the node corresponds to multiple antecedent nodes, initial marking corresponding to each node is observed
Value, divides following two situation discussion:
1. if just these nodes are put into set V there are the node of no initial marking value in antecedent node,
It returns to step 404 and continues reasoning；
2. step 408 can be continued if the node of no initial marking value is not present in antecedent node,
Judge whether node lights a fire according to ignition algorithm.In step 409, if node can light a fire, the premise knot corresponding to it is calculated
The ident value of point, and it is deleted from set V；Conversely, then deleting the antecedent node corresponding to it from V, and it is put into U
In；
2) if it is single node, divide following two situation discussion:
1. if single node corresponding types 1
If antecedent node has initial marking value, so that it may continue step 408, judge that node is according to ignition algorithm
No igniting continues step 409, if can light a fire, calculates the ident value of the corresponding antecedent node of the node, and by it from set
It is deleted in V；Conversely, then deleting the antecedent node corresponding to it from V, it is put into U；
If antecedent node does not have initial marking value, nor in set U, then the node is put into set V, is returned to
Step 404 continues reasoning；
If antecedent node is in set U, then it represents that its initial marking value is zero, cannot be lighted a fire, by the premise corresponding to it
Node is deleted from set V, is put into set U；
2. if single node corresponding types 2
If there is the node for belonging to set U in antecedent node, then the node cannot light a fire, then its corresponding premise knot
Point is deleted from set V, is put into set U；
If not belonging to the node of set U in antecedent node, and in the presence of the node of no initial marking value, continue step 409,
It puts into set V, returns to step 404 and continue reasoning；
If antecedent node has initial marking value, so that it may continue step 408, judge that node is according to ignition algorithm
No igniting continues step 409, if can light a fire, calculates its ident value for corresponding to antecedent node, and it is deleted from set V；
Conversely, then deleting the antecedent node corresponding to it from V, it is put into U；
In step 410, judge whether there is also the antecedent nodes corresponding to destination node in V, and if it exists, return to step
405 continue reasoning；If it does not exist, it obtains fault propagation path, finds out the corresponding failure cause of numerically-controlled machine tool turret；
In step 411, process terminates.
The invention patent has the beneficial effect that a kind of numerically-controlled machine tool based on paste H net node igniting and backward reasoning method
Turret fault diagnosis system, the system are based on ARM embedded system and utilize the knot of FUZZY H NETS according to FUZZY H pessimistic concurrency control
Point igniting and reverse Reasoning Algorithm Based can simple, quick, accurately orient the abort situation and reason of numerically-controlled machine tool, failure
The features such as diagnosis has quick and precisely, high degree of automation, intelligent, diagnosis process is simpler, more efficient.
Claims (2)
1. a kind of numerically-controlled machine tool turret fault diagnosis system based on paste H net node igniting and backward reasoning method, belongs to
Fault diagnosis technology field, comprising: arm processor (101), translation circuit (102), velocity sensor (103), pressure sensor
(104), position sensor (105), power supply (106), keyboard (107), light-emitting diode display (108), phonetic alarm (109) sum number
Control lathe turret (110) composition, which is characterized in that numerically-controlled machine tool turret fault diagnosis system is that an intelligence is examined
Disconnected system, arm processor (101) respectively with translation circuit (102), power supply (106), keyboard (107), light-emitting diode display (108),
Phonetic alarm (109) is connected, translation circuit (102) respectively with velocity sensor (103), pressure sensor (104) and position
It sets sensor (105) to be connected, three sensors are connected with numerically-controlled machine tool turret (110), specifically, velocity sensor
(103) it is connected with knife rest motor, pressure sensor (104) and position sensor (105) are connected with knife rest；
Arm processor (101) carries out information exchange and communication for each component, and caller carries out fault diagnosis；
Translation circuit (102) is made of analog-digital converter (ADC), can be used for the number of fault diagnosis for analog quantity to be converted into
Word amount；
Velocity sensor (103), for measuring the revolving speed of knife rest motor and being converted into electric signal；
Pressure sensor (104), for measuring the coupling mechanism force of knife rest and being converted into electric signal；
Position sensor (105), for measuring the position of knife rest and being converted into electric signal；
Power supply (106), for powering to whole system；
Keyboard (107) for the input of numerically-controlled machine tool turret FUZZY H NETS fault model initial marking value, and carries out various
The processing of function key and number key；
Light-emitting diode display (108), for carrying out the display of fault diagnosis result；
Phonetic alarm (109), the audio alert for failure；
Numerically-controlled machine tool turret (110) refers to the constituent element of numerically-controlled machine tool turret, including knife rest motor and knife rest.
2. a kind of numerically-controlled machine tool capstan head knife based on paste H net node igniting and backward reasoning method according to claim 1
Frame fault diagnosis system, it is characterised in that the microprocessor of fault diagnosis system is arm processor, using the node of FUZZY H NETS
Igniting and backward reasoning method carry out fault diagnosis.
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|---|---|---|---|---|
| CN2062670U (en) * | 1989-06-21 | 1990-09-26 | 南京中南电子机电经理部(南京电机厂) | Conbined cutter frame for processing cover or disk parts |
| JP2000218471A (en) * | 1999-02-03 | 2000-08-08 | Nakamura Tome Precision Ind Co Ltd | Method of detecting workpiece in machine tool, detecting head and turret lathe |
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