JP5757432B2 - Device or part manufacturing method - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 238000010586 diagram Methods 0.000 claims description 18
- 230000007547 defect Effects 0.000 claims description 14
- 230000007257 malfunction Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 5
- 238000005094 computer simulation Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 8
- 230000003993 interaction Effects 0.000 description 2
- 125000002066 L-histidyl group Chemical group [H]N1C([H])=NC(C([H])([H])[C@](C(=O)[*])([H])N([H])[H])=C1[H] 0.000 description 1
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- 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
- G05B23/0243—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 model based detection method, e.g. first-principles knowledge model
- G05B23/0245—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 model based detection method, e.g. first-principles knowledge model based on a qualitative model, e.g. rule based; if-then decisions
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- 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
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0286—Modifications to the monitored process, e.g. stopping operation or adapting control
- G05B23/0289—Reconfiguration to prevent failure, e.g. usually as a reaction to incipient failure detection
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Description
本発明は、装置又は部品の製造方法に関する。 The present invention relates to a method for manufacturing an apparatus or a part.
故障木解析（Ｆａｕｌｔ Ｔｒｅｅ Ａｎａｌｙｓｉｓ、ＦＴＡ）では、解析対象である不具合を頂上事象とし、これを原因となる下位事象の論理和（ＯＲ）又は論理積（ＡＮＤ）に展開し、ツリー状のＦＴ図を作成する（特許文献１参照）。下位事象のうち、最下位の事象は基本事象と呼ばれ、不具合の発生を防止するには、これら基本事象についての対策を検討すればよい。 In Fault Tree Analysis (FTA), a failure to be analyzed is regarded as a top event, and this is expanded into a logical sum (OR) or logical product (AND) of lower events that cause this, and a tree-like FT diagram Is created (see Patent Document 1). Of the lower level events, the lowest level event is called a basic event, and countermeasures for these basic events may be considered in order to prevent the occurrence of defects.
図２は、「変速ショックが大きい」という不具合を頂上事象とするＦＴ図である。基本事象は「ピーク入力トルクが大きい」、「クラッチトルク容量が大きい」、「クラッチ油圧立ち上がりが大きい」、「クラッチ受圧面積が大きい」、「クラッチ作動フリクションが大きい」及び「クラッチ作動時間が小さい」であり、変速ショックを抑制するには、これらについての対策が検討されることになる。 FIG. 2 is an FT diagram in which the failure “the shift shock is large” is a top event. Basic events are “high peak input torque”, “large clutch torque capacity”, “large clutch hydraulic pressure rise”, “large clutch pressure receiving area”, “large clutch operating friction” and “short clutch operating time” In order to suppress the shift shock, measures for these will be studied.
ＦＴ図を活用して不具合の発生を防止するには、ＦＴ図に含まれる基本事象を抽出し、抽出された基本事象に文字情報として含まれる一群の物理量（形状、材質、重量、動作条件等の装置又は部品そのもののパラメータ、装置又は部品の製造条件に関するパラメータ等）を、それぞれ不具合が抑制される方向に変更すればよいと一般的には考えられる。 In order to prevent the occurrence of defects by utilizing the FT diagram, a basic event included in the FT diagram is extracted, and a group of physical quantities (shape, material, weight, operating conditions, etc.) included as character information in the extracted basic event It is generally considered that the parameters of the device or the component itself, the parameters relating to the manufacturing conditions of the device or the component, and the like may be changed in the direction in which the malfunction is suppressed.
しかしながら、基本事象に対応する物理量をそれぞれ不具合が抑制される方向に変更したとしても、必ずしも不具合を防止できるわけではない。その一因としては、ＦＴ図を用いれば不具合の発生に影響を及ぼす物理量を抽出することはできるが、それら物理量の相互作用まで検証することはできないことが挙げられる。 However, even if the physical quantity corresponding to the basic event is changed in a direction in which the problem is suppressed, the problem cannot always be prevented. One reason for this is that although FT diagrams can be used to extract physical quantities that affect the occurrence of defects, the interaction between these physical quantities cannot be verified.
本発明は、かかる技術的課題に鑑みてなされたもので、装置又は部品に不具合が発生した場合に当該不具合を発生させない改良品を製造する製造方法を提供することである。 This invention is made | formed in view of this technical subject, and when a malfunction generate | occur | produces in an apparatus or components, it is providing the manufacturing method which manufactures the improved product which does not generate | occur | produce the said malfunction.
本発明のある態様によれば、装置又は部品の製造方法であって、前記装置又は部品に不具合が発生した場合に当該不具合を頂上事象とするＦＴ図を作成し、前記ＦＴ図の最下位事象である基本事象に文字情報として含まれる一群の物理量を抽出し、前記一群の物理量に属する物理量の少なくとも一つの値を前記不具合発生時の値から前記不具合が抑制される方向に変更して得られる前記一群の物理量の値の組み合わせを複数用意し、前記複数の組み合わせそれぞれについて前記不具合が発生するかを、前記装置又は部品の実物を用いた試験又はコンピュータシミュレーションによって検証し、前記検証によって前記不具合が発生しないことが確認された組み合わせの一つを用いて前記装置又は部品の改良品を製造する、ことを特徴とする装置又は部品の製造方法が提供される。 According to an aspect of the present invention, there is provided a method for manufacturing an apparatus or a component, wherein when a malfunction occurs in the apparatus or component, an FT diagram is created with the malfunction as a top event, and the lowest event in the FT diagram Is obtained by extracting a group of physical quantities included in the basic event as character information and changing at least one value of the physical quantities belonging to the group of physical quantities from a value at the time of the occurrence of the malfunction to a direction in which the malfunction is suppressed. A plurality of combinations of values of the group of physical quantities are prepared, and whether or not the failure occurs for each of the plurality of combinations is verified by a test using a real device or part or a computer simulation, and the failure is confirmed by the verification. An improved device of the device or component is manufactured using one of the combinations confirmed not to occur. The method of manufacturing a component is provided.
上記態様によれば、不具合の発生に影響を及ぼす物理量を不具合が抑制される方向に変更しているにもかかわらず不具合の発生を防止することができない組み合わせが除外される。不具合が発生しないことが確認された組み合わせを用いて改良品が製造されるので、改良品の信頼性、安全性を向上させることができる。 According to the above aspect, combinations that cannot prevent the occurrence of a defect even though the physical quantity that affects the occurrence of the defect is changed in a direction in which the defect is suppressed are excluded. Since an improved product is manufactured using a combination that has been confirmed to be free from defects, the reliability and safety of the improved product can be improved.
以下、添付図面を参照しながら本発明の実施形態について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
図１は、本発明の実施形態に係る装置又は部品（機械装置又は部品、電子装置又は部品、これらを組み合わせたシステム等）の製造方法の手順を示している。本製造方法は、装置又は部品に不具合が発生した場合に、その不具合を発生させないようにした改良品を製造するためのものである。ここでは、車両用の自動変速機に変速ショックが大きいという不具合が発生した場合に、変速ショックを発生させないようにした改良品を製造する場合を具体例として挙げて説明する。 FIG. 1 shows a procedure of a method for manufacturing a device or a component (a mechanical device or a component, an electronic device or a component, a system combining these, or the like) according to an embodiment of the present invention. This manufacturing method is for manufacturing an improved product in which a failure is not generated when a failure occurs in an apparatus or a part. Here, a specific example will be described in which an improved product that does not generate a shift shock when a problem that a shift shock is large occurs in an automatic transmission for a vehicle.
本製造方法によれば、まず、「変速ショックが大きい」を頂上事象とするＦＴ図を作成する（Ｓ１）。ＦＴ図は、作業者がその知識、経験に基づき作成してもよいし、コンピュータ支援ソフトウェア（ＦＴ図の描画を支援するソフトウェア、類似するＦＴ図をデータベースから検索して作業者に参考ＦＴ図として提示するソフトウェア、下位事象への展開の妥当性を判定するソフトウェア等）を用いて自動又は半自動で作成してもよい。 According to this manufacturing method, first, an FT diagram having “the shift shock is large” as a top event is created (S1). The FT diagram may be created by the worker based on his / her knowledge and experience, or computer support software (software supporting the drawing of the FT diagram, a similar FT diagram is retrieved from the database and used as a reference FT diagram to the worker. It may be created automatically or semi-automatically using software to be presented, software for determining the appropriateness of expansion to lower events, etc.
図２は、「変速ショックが大きい」を頂上事象とするＦＴ図である。「変速ショックが大きい」をその原因となる下位事象に展開していくことで、「ピーク入力トルクが大きい」、「クラッチトルク容量が大きい」、「クラッチ油圧立ち上がりが大きい」、「クラッチ受圧面積が大きい」、「クラッチ作動フリクションが大きい」及び「クラッチ作動時間が小さい」を基本事象とするＦＴ図が得られる。 FIG. 2 is an FT diagram in which “the shift shock is large” is a top event. By deploying “large shift shock” to the subordinate events that cause it, “peak input torque is large”, “clutch torque capacity is large”, “clutch oil pressure rise is large”, “clutch pressure receiving area is An FT diagram whose basic events are “large”, “large clutch operation friction”, and “small clutch operation time” is obtained.
なお、変速ショックが大きくなる要因としては車両の伝達特性等の他の要因も考えられるが、図２では理解を容易にするために、他の要因については省略している。 Although other factors such as the transmission characteristics of the vehicle can be considered as factors that increase the shift shock, other factors are omitted in FIG. 2 for easy understanding.
次に、基本事象に文字情報として含まれる物理量を抽出する（Ｓ２）。図２のＦＴ図の場合、「ピーク入力トルク」、「クラッチトルク容量」、「クラッチ油圧立ち上がり」、「クラッチ受圧面積」、「クラッチ作動フリクション」及び「クラッチ作動時間」が抽出される。このようにして抽出された複数の物理量を、以下、「一群の物理量」という。 Next, a physical quantity included as character information in the basic event is extracted (S2). In the case of the FT diagram of FIG. 2, “peak input torque”, “clutch torque capacity”, “clutch hydraulic pressure rise”, “clutch pressure receiving area”, “clutch operating friction” and “clutch operating time” are extracted. The plurality of physical quantities extracted in this way are hereinafter referred to as “a group of physical quantities”.
「変速ショックが大きい」という不具合を防止するには、これら一群の物理量に属する物理量を、それぞれ不具合が抑制される方向に変更すればよい。すなわち、「ピーク入力トルク」、「クラッチトルク容量」、「クラッチ油圧立ち上がり」、「クラッチ受圧面積」及び「クラッチ作動フリクション」を小さくし、「クラッチ作動時間」を大きくすればよい。 In order to prevent the problem of “large shift shock”, the physical quantities belonging to the group of physical quantities may be changed in a direction in which the problem is suppressed. That is, “peak input torque”, “clutch torque capacity”, “clutch hydraulic pressure rise”, “clutch pressure receiving area” and “clutch operation friction” may be reduced and “clutch operation time” may be increased.
次に、一群の物理量に属する物理量それぞれについて、不具合発生時の値よりも不具合が抑制される方向に変更した値を複数用意する（Ｓ３）。例えば、「ピーク入力トルク」、「クラッチトルク容量」、「クラッチ油圧立ち上がり」、「クラッチ受圧面積」及び「クラッチ作動フリクション」について、不具合発生時の値よりも小さなａ１〜ａ３、ｂ１〜ｂ３、ｃ１〜ｃ３、ｄ１〜ｄ３及びｅ１〜ｅ３を用意する。また、「クラッチ作動時間」について、不具合発生時の値よりも大きなｆ１〜ｆ３を用意する。 Next, for each physical quantity belonging to a group of physical quantities, a plurality of values that are changed in a direction in which the defect is suppressed from the value at the time of occurrence of the defect are prepared (S3). For example, “peak input torque”, “clutch torque capacity”, “clutch hydraulic pressure rise”, “clutch pressure receiving area”, and “clutch operating friction” are a1 to a3, b1 to b3, and c1 that are smaller than the values at the time of occurrence of the malfunction. -C3, d1-d3, and e1-e3 are prepared. For the “clutch operating time”, f1 to f3 larger than the value at the time of occurrence of the trouble are prepared.
なお、ここでは一群の物理量に属する物理量それぞれについて、不具合発生時の値を不具合が抑制される方向に変更することで複数の値を用意しているが、用意する複数の値の一部が不具合発生時の値（変更無しの値）であってもよい。 Here, for each physical quantity belonging to a group of physical quantities, multiple values are prepared by changing the value at the time of malfunction to a direction in which the malfunction is suppressed, but some of the prepared multiple values are malfunctioning. it may be a value at the time of occurrence (value of no change).
そして、一群の物理量に属する物理量それぞれについて、用意された複数の値の一つを任意に選択し、物理量の値の組み合わせを一つ作成する。さらに、用意された複数の値から選択される値を変えることで、既に作成した組み合わせとは異なる物理量の値の組み合わせを作成する。この作業を繰り返すことによってＳ３で用意された値の全組み合わせを作成し、これを表形式にする（Ｓ４）。 Then, for each physical quantity belonging to a group of physical quantities, one of a plurality of prepared values is arbitrarily selected to create one combination of physical quantity values. Furthermore, by changing a value selected from a plurality of prepared values, a combination of physical quantity values different from the already created combination is created. By repeating this operation, all combinations of the values prepared in S3 are created, and this is converted into a table format (S4).
図３は、このようにして作成された組み合わせ表の一例である。各組み合わせに含まれる一群の物理量の各値は、少なくとも一つが不具合発生時の値から不具合が抑制される方向に変更されている。 FIG. 3 is an example of the combination table created in this way. At least one of the values of the group of physical quantities included in each combination is changed from the value at the time of occurrence of the failure to the direction in which the failure is suppressed.
次に、各組み合わせを自動変速機に適用し、不具合が発生するか否かの検証を行う（Ｓ５）。不具合が発生するか否かの検証は、自動変速機をモデル化してこのモデルに組み合わせに係る物理量の値を適用し、市販のシミュレーションソフトウェアを用いて行う。検証対象の組み合わせに係る物理量の値を適用した自動変速機の実物を用意し、これを用いて検証するようにしてもよい。 Next, each combination is applied to the automatic transmission, and whether or not a failure occurs is verified (S5). Verification of whether or not a failure occurs is performed using a commercially available simulation software by modeling an automatic transmission, applying a physical quantity value related to the combination to this model. An actual automatic transmission to which a physical quantity value related to a combination to be verified is applied may be prepared and used for verification.
そして、検証結果から、不具合が発生しないことが確認された組み合わせを抽出し（Ｓ６）、抽出された組み合わせの一つを適用して自動変速機の改良品を製造する（Ｓ７）。いずれの組み合わせを用いるかは、一群の物理量に属する物理量の値をその組み合わせに係る値に変更する場合の容易性、コスト等を考慮して決定される。 Then, from the verification result, a combination that is confirmed not to cause a failure is extracted (S6), and an improved product of the automatic transmission is manufactured by applying one of the extracted combinations (S7). Which combination is used is determined in consideration of easiness, cost, etc. when changing the value of a physical quantity belonging to a group of physical quantities to a value related to the combination.
以上の手順によって製造される自動変速機の改良品は、「変速ショックが大きい」という不具合が発生しない。 The improved automatic transmission manufactured by the above procedure does not have the problem of “large shift shock”.
したがって、上記実施形態によれば、不具合の発生に影響を及ぼす物理量をそれぞれ不具合が抑制される方向に変更しているにもかかわらず、これら物理量の相互作用等によって不具合の発生を防止することができない組み合わせが除外される。不具合が発生しないことが確認された組み合わせを用いて改良品が製造されるので、改良品の信頼性、安全性を向上させることができる（請求項１に対応する効果）。 Therefore, according to the above-described embodiment, despite the fact that the physical quantities that affect the occurrence of defects are changed in the direction in which the defects are suppressed, the occurrence of the defects can be prevented by the interaction of these physical quantities. Combinations that cannot be excluded are excluded. Since an improved product is manufactured using a combination that has been confirmed to be free from defects, the reliability and safety of the improved product can be improved (effect corresponding to claim 1).
以上、本発明の実施形態について説明したが、上記実施形態は本発明の適用例の一つを示したものに過ぎず、本発明の技術的範囲を上記実施形態の具体的構成に限定する趣旨ではない。 The embodiment of the present invention has been described above, but the above embodiment is merely one example of application of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.
例えば、ここでは本発明を車両用の自動変速機の製造方法に適用した実施形態を示したが、本発明は、装置又は部品の製造方法に広く適用できるものである。 For example, an embodiment in which the present invention is applied to a method for manufacturing an automatic transmission for a vehicle is shown here, but the present invention can be widely applied to a method for manufacturing an apparatus or a part.
Claims (1)
前記装置又は部品に不具合が発生した場合に当該不具合を頂上事象とするＦＴ図を作成し、
前記ＦＴ図の最下位事象である基本事象に文字情報として含まれる物理量を一群の物理量として抽出し、
前記一群の物理量に属する物理量の少なくとも一つの値を前記不具合発生時の値から前記不具合が抑制される方向に変更して得られる前記一群の物理量の値の組み合わせを複数用意し、
前記複数の組み合わせそれぞれについて前記不具合が発生するかを、前記装置又は部品の実物を用いた試験又はコンピュータシミュレーションによって検証し、
前記検証によって前記不具合が発生しないことが確認された組み合わせの一つを用いて前記装置又は部品の改良品を製造する、
ことを特徴とする装置又は部品の製造方法。 A method for manufacturing an apparatus or a component, comprising:
If a failure occurs in the device or component, create an FT diagram with the failure as the top event,
Extracting a physical quantity included as character information in a basic event which is the lowest event in the FT diagram as a group of physical quantities;
Preparing a plurality of combinations of values of the group of physical quantities obtained by changing at least one value of physical quantities belonging to the group of physical quantities from a value at the time of the malfunction to a direction in which the malfunction is suppressed;
Whether the failure occurs for each of the plurality of combinations is verified by a test or computer simulation using the actual device or part,
Producing an improved product of the device or component using one of the combinations confirmed not to cause the defect by the verification;
A method of manufacturing an apparatus or a part characterized by the above.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012210667A JP5757432B2 (en) | 2012-09-25 | 2012-09-25 | Device or part manufacturing method |
| PCT/JP2013/068825 WO2014050256A1 (en) | 2012-09-25 | 2013-07-10 | Method for producing component or device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012210667A JP5757432B2 (en) | 2012-09-25 | 2012-09-25 | Device or part manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2014067135A JP2014067135A (en) | 2014-04-17 |
| JP5757432B2 true JP5757432B2 (en) | 2015-07-29 |
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