CN109919332B - Management method for making engine maintenance decision according to cost economic point - Google Patents
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Abstract
The invention provides a management method for making an engine maintenance decision according to a cost economic point, which solves the management defect of the existing aeroengine maintenance decision and comprises the steps of inputting basic data of an engine, analyzing the maintenance cost of unit bodies, making an engine maintenance plan, extracting the information of the unit bodies of the engine, judging the maintenance level of each unit body and determining an engine maintenance scheme.
Description
Technical Field
The invention relates to the technical field of aero-engine maintenance, in particular to a management method for making an engine maintenance decision according to a cost economy point.
Background
The aeroengine is a main power source and an air entraining device of an aircraft, is a complex thermodynamic machine integrating electro-mechanical and hydraulic, works in a high-temperature, high-speed and high-pressure environment, and can cause great potential safety hazards to the flight safety of the aircraft when the engine is in high-reliability equipment, so that the aeroengine needs to be subjected to planned maintenance and maintenance in the whole service life cycle in order to ensure the reliable operation of the aeroengine, and the maintenance decision of the aeroengine is required to be uniformly managed.
As an important part of an aircraft, the maintenance cost of an engine accounts for a large part of the operation cost of the aircraft, how to save the cost in the normal operation and maintenance process of the engine is the focus of each airline company, the current airlines generally maintain the engine when the flight time and the flight cycle of the engine are over-limited or are about to be over-limited, the maintenance cost is increased, the risk of accidents of the engine is also greatly increased, and the system can analyze the optimal maintenance interval of the engine according to historical data to formulate a maintenance scheme of the engine based on the optimal maintenance interval.
Disclosure of Invention
The invention provides a management method for making an engine maintenance decision according to a cost economy point, aiming at the management defect of the existing aeroengine maintenance decision.
To this end, the invention provides a management method for making engine maintenance decisions based on cost economy points, comprising the steps of:
step 1: inputting basic data of an engine;
step 2: analyzing the maintenance cost of the unit body;
step 3: making an engine maintenance plan;
step 4: extracting engine unit body information;
step 5: judging the maintenance level of each unit body;
step 6: an engine maintenance schedule is determined.
Preferably, step 1 is realized mainly by the following steps:
the engine type model is as follows:
Entyp＝{ID,name}
wherein ID is a globally unique identification of the engine type, and is leased by 36 digits, a case letter and an underline, name is an engine type name, and the model is used for assisting in inquiring engine type information;
the engine model is as follows:
EnMdl＝{ID,name,entype}
wherein ID is a global unique identification of the engine model, and is leased by 36 digits, a case letter and an underline, name is the name of the engine model, entype is the engine type where the engine model is located, and the model is used for assisting in inquiring the engine model information;
the engine model is as follows:
ENGINE＝{esn,basicInfo}
esn is a globally unique identifier of the engine, basicInfo is other basic information of the engine, and the model is used for assisting in inquiring the information of the engine;
the engine unit model is as follows:
UNIT＝{ID,unitname,unitnum,unitsn,esn,entype,enmdl,fc,dayfc,basicinfo}
wherein ID is the globally unique identifier of the engine unit, it is leased by 36 digits, case letters and underlines, unitname is the unit name, unitnum is the unit piece number, unitsn is the unit serial number, esn is engine information, entype is engine type information, enmdl is engine model information, fc is the unit's flight cycle, dayfc is the unit's daily flight cycle, basicinfo is the unit's other basic information, this model is used to assist in creating engine maintenance scheme information;
the engine time of flight model is as follows:
EngineTime＝{ID,esn,entype,enmdl,date,fc,basicinfo}
wherein ID is a global unique identifier of engine flight data and is leased by 36 digits, case letters and underlines, esn is engine information, entype is engine type information, enmdl is engine model information, date is engine flight date, fc is engine flight cycle, basicinfo is other basic information of engine flight data, and the model is used for assisting in inquiring and calculating unit body flight cycle information;
the engine maintenance cost record data model is as follows:
EngineCost＝{ID,unitname,unitnum,unitsn,esn,entype,enmdl,fc,cost,maintlevel,basicinfo}
the ID is a global unique identifier of maintenance cost record data, and consists of 36 digits, a case letter and an underline, the unitname is a unit name, the unitnum is a unit part number, the unitsn is a unit serial number, esn is engine information, the entype is engine type information, enmdl is engine model information, fc is a unit flight cycle during maintenance, cost is unit maintenance cost, main level is unit maintenance level, basicinfo is other basic information of the maintenance cost record data, and the model is used for assisting in calculating unit cost analysis information;
the engine cost analysis model is as follows:
EngineCostAnalys＝{ID,unitname,unitnum,entype,enmdl,bestfc,express,basicinfo}
wherein ID is a globally unique identifier of cost analysis data, and is leased by 36 digits, case letters and underlines, unitname is a unit body name, unitnum is a unit body number, entype is engine type information, enmdl is engine model information, bestfc is an optimal maintenance cycle interval automatically calculated by the system, express is a relational expression of cost and flight cycle automatically calculated by the system, and basicinfo is other basic information of the cost analysis data, and the model is used for assisting in completing the establishment of engine maintenance scheme information;
the engine maintenance protocol model is as follows:
ENGINEREPAIR＝{ID,esn,repairdate,removedate,maintscope,unitorder,basicinfo}
wherein ID is a global unique identification of an engine maintenance scheme, and is leased by 36 digits, a case letter and an underline, esn is an engine identification, repairate represents the in-plant maintenance time of the engine, removedate represents the removal time of the engine, mainscope represents the maintenance range of the whole engine, unitorder represents the maintenance level of each unit body of the engine maintenance at this time, basic info is other basic information of the engine maintenance scheme, and the model is used for assisting in inquiring the information of the engine maintenance scheme.
Preferably, step 2 is realized mainly by the following steps:
query the same model/type of engine:
esnlist＝ESN.findByEntype(String entype,String enmdl)；
and then inquiring maintenance records of the unit according to the unit part number:
unitCostList＝EngineCost.findByEsnUnit(String esn,String unitnum)；
if the queried maintenance cost record is less than or equal to 3, directly ending; combining the maintenance cost into two one-dimensional arrays:
two one-dimensional arrays are used as a data basis, a mathematical analysis method is adopted to obtain a quadratic element a, a first-order element coefficient b and a constant c, an expression is generated, the relation between the flight cycle and the maintenance cost is represented, wherein x represents the flight cycle, and y represents the maintenance cost:
y＝a*x*x+b*x+c
according to the maintenance expression, an optimal solution x of y is obtained by means of a mathematical statistical method and is used as an optimal maintenance interval, namely bestfc.
Preferably, the step 3 is mainly implemented by the following steps:
according to the actual running condition of the engine, a maintenance plan is made for the engine scheduled to be maintained, and the removal date of the engine is set, so that the flying cycle of each unit body when the engine is removed is predicted, and the flying cycle is taken as a data base for making the maintenance plan.
Preferably, the step 4 is mainly implemented by the following steps:
firstly, determining the detaching date of the engine, and if the detaching time is empty, not predicting the unit body flight cycle:
UNITlist＝UNIT.findByEsn(esn)；
if the disassembly time is elapsed, the flying cycle of the unit cell is directly extracted:
return UNITlist；
if the disassembly time is in the future, the unit body flight cycle needs to be budgeted through the difference of days and the daily flight cycle, and the calculation method is as follows:
preferably, step 5 is mainly implemented by the following steps:
traversing the unit body information of the engine, extracting corresponding cost analysis information of the unit body according to the unit body information, judging whether the unit body needs to be maintained according to the optimal maintenance interval in the cost analysis information, and simultaneously calculating maintenance cost, wherein the judging method is that if the flight cycle of the unit body is much lower than the optimal maintenance interval, the unit body is not recommended to be maintained this time, the maintenance can be delayed until the next time, and if the flight cycle of the unit body is close to or much higher than the optimal maintenance interval, the unit body is recommended to be overhauled, and the specific calculating method is as follows:
preferably, step 6 is realized mainly by the following steps:
and 5, obtaining the recommended maintenance level of each unit body of the engine according to the step, and based on the recommended maintenance level, adjusting the maintenance level of the unit body according to the actual condition so as to meet the actual requirement, wherein the integral maintenance condition of a single engine and the whole fleet is usually comprehensively considered in the actual operation and maintenance, so that the final maintenance scheme can be corrected, and the system recommended scheme is used as a correction reference.
The invention provides a method for making a maintenance scheme aiming at the cost economy point of an engine, which comprises the following steps of: establishing an information model of basic engine data, wherein the information model comprises an engine type/model, an engine unit body, engine flight data, an engine maintenance cost record and an engine maintenance cost analysis, and carrying out real-time updating; upper layer data: generating an engine maintenance scheme, and updating the result at any time along with the updating of the basic data; important basis is provided for the establishment of maintenance schemes, and the maintenance efficiency of the engine is effectively improved.
Drawings
FIG. 1 is a diagram of the overall architecture of the present invention;
FIG. 2 is a flow chart of the scheme formulation of the present invention;
FIG. 3 is a flow chart of an engine unit maintenance cost analysis;
FIG. 4 is a flow chart for determining a maintenance level of a unit.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 and 4, the present invention provides a management method for making an engine maintenance decision based on a cost-effective point, comprising the steps of:
step 1: and (3) inputting basic data of an engine:
the basic data mainly provides a data query service, a data increment service and a data analysis service based on a relation model.
In the basic information, firstly, an engine basic information storage model is established, management of basic information is realized by utilizing a relational database, the basic information comprises engine type information, engine model information, engine unit information, engine flight time information, engine maintenance cost record data information, engine cost analysis information and engine maintenance scheme information, wherein the engine information is related to the unit information, the engine flight time information, the engine maintenance cost record information and the engine cost analysis information, and the engine unit information, the engine cost information and the engine cost analysis result information are conveniently inquired;
then, establishing basic information data of the engine, wherein the basic information data of the engine comprises engine type information, engine model information and engine registration information, and updating and maintaining the information in real time so as to ensure that the state of the engine is always the latest state and ensure the accuracy of the engine maintenance scheme result;
the method comprises the steps of establishing unit body information and flight time information of an engine, wherein the unit body information and the flight time information represent which unit bodies and flight time data of each unit body are contained under the engine, and main information of the unit bodies of the engine comprises information such as engine type, engine model, engine, unit body name, unit body part number, unit body serial number, unit body flight cycle and the like, and the flight time data of the engine comprise information such as engine type, engine model, engine, date, flight cycle and the like;
the maintenance cost information of the engine is input, the cost information is related to the engine and the unit body information, the main information of the engine maintenance cost comprises the engine type, the engine model, the engine, the unit body name, the unit body part number, the unit body serial number, the repair cost, the repair level, the flight cycle during repair and the like, the system calculates to obtain a cost analysis problem according to the maintenance cost information of the engine, and records the relationship between the optimal maintenance interval and the maintenance cycle cost of the unit body;
and finally, establishing a maintenance scheme of the engine, storing a final maintenance scheme obtained according to the analysis result of the unit body maintenance cost, and combining the actual situation to apply to the actual situation.
The engine type model is as follows:
Entyp＝{ID,name}
wherein ID is a globally unique identification of the engine type, and is leased by 36 digits, a case letter and an underline, name is an engine type name, and the model is used for assisting in inquiring engine type information;
the engine model is as follows:
EnMdl＝{ID,name,entype}
wherein ID is a global unique identification of the engine model, and is leased by 36 digits, a case letter and an underline, name is the name of the engine model, entype is the engine type where the engine model is located, and the model is used for assisting in inquiring the engine model information;
the engine model is as follows:
ENGINE＝{esn,basicInfo}
esn is a globally unique identifier of the engine, basicInfo is other basic information of the engine, and the model is used for assisting in inquiring the information of the engine;
the engine unit model is as follows:
UNIT＝{ID,unitname,unitnum,unitsn,esn,entype,enmdl,fc,dayfc,basicinfo}
wherein ID is the globally unique identifier of the engine unit, it is leased by 36 digits, case letters and underlines, unitname is the unit name, unitnum is the unit piece number, unitsn is the unit serial number, esn is engine information, entype is engine type information, enmdl is engine model information, fc is the unit's flight cycle, dayfc is the unit's daily flight cycle, basicinfo is the unit's other basic information, this model is used to assist in creating engine maintenance scheme information;
the engine time of flight model is as follows:
EngineTime＝{ID,esn,entype,enmdl,date,fc,basicinfo}
wherein ID is a global unique identifier of engine flight data and is leased by 36 digits, case letters and underlines, esn is engine information, entype is engine type information, enmdl is engine model information, date is engine flight date, fc is engine flight cycle, basicinfo is other basic information of engine flight data, and the model is used for assisting in inquiring and calculating unit body flight cycle information;
the engine maintenance cost record data model is as follows:
EngineCost＝{ID,unitname,unitnum,unitsn,esn,entype,enmdl,fc,cost,maintlevel,basicinfo}
the ID is a global unique identifier of maintenance cost record data, and consists of 36 digits, a case letter and an underline, the unitname is a unit name, the unitnum is a unit part number, the unitsn is a unit serial number, esn is engine information, the entype is engine type information, enmdl is engine model information, fc is a unit flight cycle during maintenance, cost is unit maintenance cost, main level is unit maintenance level, basicinfo is other basic information of the maintenance cost record data, and the model is used for assisting in calculating unit cost analysis information;
the engine cost analysis model is as follows:
EngineCostAnalys＝{ID,unitname,unitnum,entype,enmdl,bestfc,express,basicinfo}
wherein ID is a globally unique identifier of cost analysis data, and is leased by 36 digits, case letters and underlines, unitname is a unit body name, unitnum is a unit body number, entype is engine type information, enmdl is engine model information, bestfc is an optimal maintenance cycle interval automatically calculated by the system, express is a relational expression of cost and flight cycle automatically calculated by the system, and basicinfo is other basic information of the cost analysis data, and the model is used for assisting in completing the establishment of engine maintenance scheme information;
the engine maintenance protocol model is as follows:
ENGINEREPAIR＝{ID,esn,repairdate,removedate,maintscope,unitorder,
basicinfo}
wherein ID is a global unique identification of an engine maintenance scheme, and is leased by 36 digits, a case letter and an underline, esn is an engine identification, repairate represents the in-plant maintenance time of the engine, removedate represents the removal time of the engine, mainscope represents the maintenance range of the whole engine, unitorder represents the maintenance level of each unit body of the engine maintenance at this time, basic info is other basic information of the engine maintenance scheme, and the model is used for assisting in inquiring the information of the engine maintenance scheme.
Step 2: and analyzing the maintenance cost of the unit body:
query the same model/type of engine:
esnlist＝ESN.findByEntype(String entype,String enmdl)；
and then inquiring maintenance records of the unit according to the unit part number:
unitCostList＝EngineCost.findByEsnUnit(String esn,String unitnum)；
if the queried maintenance cost record is less than or equal to 3, directly ending, wherein if the data quantity is less than 3, the statistical result error is larger and has no reference significance; combining the maintenance cost into two one-dimensional arrays:
two one-dimensional arrays are used as a data basis, a mathematical analysis method is adopted to obtain a quadratic element a, a first-order element coefficient b and a constant c, an expression is generated, the relation between the flight cycle and the maintenance cost is represented, wherein x represents the flight cycle, and y represents the maintenance cost:
y＝a*x*x+b*x+c
according to the maintenance expression, an optimal solution x of y is obtained by means of a mathematical statistical method and is used as an optimal maintenance interval, namely bestfc.
Step 3: making an engine maintenance plan:
according to the actual running condition of the engine, a maintenance plan is made for the engine scheduled to be maintained, and the removal date of the engine is set, so that the flying cycle of each unit body when the engine is removed is predicted, and the flying cycle is taken as a data base for making the maintenance plan.
Step 4: extracting engine unit body information:
firstly, determining the detaching date of the engine, and if the detaching time is empty, not predicting the unit body flight cycle:
UNITlist＝UNIT.findByEsn(esn)；
if the disassembly time is elapsed, the flying cycle of the unit cell is directly extracted:
return UNITlist；
if the disassembly time is in the future, the unit body flight cycle needs to be budgeted through the difference of days and the daily flight cycle, and the calculation method is as follows:
step 5: judging the maintenance level of each unit body:
traversing the unit body information of the engine, extracting corresponding cost analysis information of the unit body according to the unit body information, judging whether the unit body needs to be maintained according to the optimal maintenance interval in the cost analysis information, and simultaneously calculating maintenance cost, wherein the judging method is that if the flight cycle of the unit body is much lower than the optimal maintenance interval (the optimal maintenance interval is set to 1000 cycles by a system), the unit body is not recommended to be maintained this time, the next maintenance can be delayed, and if the flight cycle of the unit body is close to or far higher than the optimal maintenance interval, the unit body is recommended to be overhauled, and the specific calculating method is as follows:
when an engine maintenance scheme is formulated, firstly, determining the detaching time of the engine, and taking the detaching time as the basis of the maintenance information of the budget unit body;
the system predicts the flight cycle of each unit body when the engine is detached according to the detachment time, then compares the flight cycle of the unit body with the optimal maintenance cycle of the unit body, if the flight cycle is lower than the optimal maintenance cycle, the unit body is not recommended for maintenance, and if the flight cycle is close to or higher than the optimal maintenance cycle, the unit body needs to be overhauled, so that the flight cycle is used as an important basis for making an engine maintenance scheme.
Step 6: determining an engine maintenance scheme:
and 5, obtaining the recommended maintenance level of each unit body of the engine according to the step, and based on the recommended maintenance level, adjusting the maintenance level of the unit body according to the actual condition so as to meet the actual requirement, wherein the integral maintenance condition of a single engine and the whole fleet is usually comprehensively considered in the actual operation and maintenance, so that the final maintenance scheme can be corrected, and the system recommended scheme is used as a correction reference.
However, the foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention are intended to fall within the scope of the claims.
Claims (2)
1. A method of managing engine maintenance decisions based on cost-effective points, comprising the steps of:
step 1: inputting basic data of an engine;
step 2: analyzing the maintenance cost of the unit body;
the step 2 is mainly realized by the following steps:
query the same model/type of engine:
esnlist＝ESN.findByEntype(String entype,String enmdl)；
and then inquiring maintenance records of the unit according to the unit part number:
unitCostList＝EngineCost.findByEsnUnit(String esn,String unitnum)；
if the queried maintenance cost record is less than or equal to 3, directly ending; combining the maintenance cost into two one-dimensional arrays:
two one-dimensional arrays are used as a data basis, a mathematical analysis method is adopted to obtain a quadratic element a, a first-order element coefficient b and a constant c, an expression is generated, the relation between the flight cycle and the maintenance cost is represented, wherein x represents the flight cycle, and y represents the maintenance cost:
y＝a*x*x+b*x+c
according to the maintenance expression, obtaining an optimal solution x of y by means of a mathematical statistics method, and taking the optimal solution x as an optimal maintenance interval, namely bestfc;
step 3: making an engine maintenance plan;
the step 3 is mainly realized by the following steps:
according to the actual running condition of the engine, a maintenance plan is made for the engine scheduled to be maintained, and the disassembly date of the engine is set, so that the flying cycle of each unit body when the engine is disassembled is predicted, and the flying cycle is taken as a data base for making the maintenance plan;
step 4: extracting engine unit body information;
the step 4 is mainly realized by the following steps:
firstly, determining the detaching date of the engine, and if the detaching time is empty, not predicting the unit body flight cycle:
UNITlist＝UNIT.findByEsn(esn)；
if the disassembly time is elapsed, the flying cycle of the unit cell is directly extracted:
return UNITlist；
if the disassembly time is in the future, the unit body flight cycle needs to be budgeted through the difference of days and the daily flight cycle, and the calculation method is as follows:
step 5: judging the maintenance level of each unit body;
the step 5 is mainly realized by the following steps:
traversing the unit body information of the engine, extracting corresponding cost analysis information of the unit body according to the unit body information, judging whether the unit body needs to be maintained according to the optimal maintenance interval in the cost analysis information, and simultaneously calculating maintenance cost, wherein the judging method is that if the flight cycle of the unit body is much lower than the optimal maintenance interval, the unit body is not recommended to be maintained this time, the maintenance can be delayed until the next time, and if the flight cycle of the unit body is close to or much higher than the optimal maintenance interval, the unit body is recommended to be overhauled, and the specific calculating method is as follows:
step 6: determining an engine maintenance scheme;
the step 6 is mainly realized by the following steps:
and 5, obtaining the recommended maintenance level of each unit body of the engine according to the step, and based on the recommended maintenance level, adjusting the maintenance level of the unit body according to the actual condition so as to meet the actual requirement, wherein the integral maintenance condition of a single engine and the whole fleet is usually comprehensively considered in the actual operation and maintenance, so that the final maintenance scheme can be corrected, and the system recommended scheme is used as a correction reference.
2. The method for managing engine maintenance decisions according to the cost-effective points according to claim 1, characterized in that said step 1 is mainly implemented by the following steps:
the engine type model is as follows:
Entyp＝{ID,name}
wherein ID is a globally unique identification of the engine type, and is leased by 36 digits, a case letter and an underline, name is an engine type name, and the model is used for assisting in inquiring engine type information;
the engine model is as follows:
EnMdl＝{ID,name,entype}
wherein ID is a global unique identification of the engine model, and is leased by 36 digits, a case letter and an underline, name is the name of the engine model, entype is the engine type where the engine model is located, and the model is used for assisting in inquiring the engine model information;
the engine model is as follows:
ENGINE＝{esn,basicInfo}
esn is a globally unique identifier of the engine, basicInfo is other basic information of the engine, and the model is used for assisting in inquiring the information of the engine;
the engine unit model is as follows:
UNIT＝{ID,unitname,unitnum,unitsn,esn,entype,enmdl,fc,dayfc,basicinfo}
wherein ID is the globally unique identifier of the engine unit, it is leased by 36 digits, case letters and underlines, unitname is the unit name, unitnum is the unit piece number, unitsn is the unit serial number, esn is engine information, entype is engine type information, enmdl is engine model information, fc is the unit's flight cycle, dayfc is the unit's daily flight cycle, basicinfo is the unit's other basic information, this model is used to assist in creating engine maintenance scheme information;
the engine time of flight model is as follows:
EngineTime＝{ID,esn,entype,enmdl,date,fc,basicinfo}
wherein ID is a global unique identifier of engine flight data and is leased by 36 digits, case letters and underlines, esn is engine information, entype is engine type information, enmdl is engine model information, date is engine flight date, fc is engine flight cycle, basicinfo is other basic information of engine flight data, and the model is used for assisting in inquiring and calculating unit body flight cycle information;
the engine maintenance cost record data model is as follows:
EngineCost＝{ID,unitname,unitnum,unitsn,esn,entype,enmdl,fc,cost,mai ntlevel,basicinfo}
the ID is a global unique identifier of maintenance cost record data, and consists of 36 digits, a case letter and an underline, the unitname is a unit name, the unitnum is a unit part number, the unitsn is a unit serial number, esn is engine information, the entype is engine type information, enmdl is engine model information, fc is a unit flight cycle during maintenance, cost is unit maintenance cost, main level is unit maintenance level, basicinfo is other basic information of the maintenance cost record data, and the model is used for assisting in calculating unit cost analysis information;
the engine cost analysis model is as follows:
EngineCostAnalys＝{ID,unitname,unitnum,entype,enmdl,bestfc,express,basicinfo}
wherein ID is a globally unique identifier of cost analysis data, and is leased by 36 digits, case letters and underlines, unitname is a unit body name, unitnum is a unit body number, entype is engine type information, enmdl is engine model information, bestfc is an optimal maintenance cycle interval automatically calculated by the system, express is a relational expression of cost and flight cycle automatically calculated by the system, and basicinfo is other basic information of the cost analysis data, and the model is used for assisting in completing the establishment of engine maintenance scheme information;
the engine maintenance protocol model is as follows:
ENGINEREPAIR＝{ID,esn,repairdate,removedate,maintscope,unitorder,basicinfo}
wherein ID is a global unique identification of an engine maintenance scheme, and is leased by 36 digits, a case letter and an underline, esn is an engine identification, repairate represents the in-plant maintenance time of the engine, removedate represents the removal time of the engine, mainscope represents the maintenance range of the whole engine, unitorder represents the maintenance level of each unit body of the engine maintenance at this time, basic info is other basic information of the engine maintenance scheme, and the model is used for assisting in inquiring the information of the engine maintenance scheme.
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