WO2014006693A1 - 故障影響評価システム及び評価方法 - Google Patents
故障影響評価システム及び評価方法 Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3668—Software testing
- G06F11/3672—Test management
- G06F11/3688—Test management for test execution, e.g. scheduling of test suites
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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
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/362—Software debugging
- G06F11/3636—Software debugging by tracing the execution of the program
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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
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/362—Software debugging
- G06F11/3644—Software debugging by instrumenting at runtime
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3664—Environments for testing or debugging software
Definitions
- the present invention relates to a failure impact evaluation system, and in particular, in a control controller that requires high reliability such as a power plant, a railway, an automobile, and a construction machine, evaluates the impact at the time of hardware failure and verifies fail-safe operation.
- the present invention relates to a failure effect evaluation system and an evaluation method suitable for the above.
- Patent Document 1 There is an invention described in Patent Document 1 as background art in this technical field.
- the plant control software verification tool described in Patent Document 1 simulates the plant control software 2 installed on the control panel 21 used to control the plant 20 and the actual control panel 21 to ensure the soundness of the plant control software 2.
- Auxiliary storage device 4 that stores verification program 3 for verifying the nature
- arithmetic device 7 that reads verification program 3 from auxiliary storage device 4 and executes a verification process
- display device that is an interface between arithmetic device 7 and a human 5
- an input device 6 that is also used as an interface
- a storage device 8 that records calculation results and software
- a printing device 9 that prints the calculation results.
- Patent Document 1 also discloses a failure effect evaluation method.
- the plant control software verification tool when the calculation unit is instructed about the failure location of the control device and equipment, an evaluation of the extent to which the instructed control device and equipment are affected is performed.
- a plant control software verification tool having an impact evaluation means for performing.
- a simulator as a control program verification tool can be used to arbitrarily change the system operating environment, check for the presence of a failure effect that does not become apparent, and affect the control program under the new operating environment.
- the ability to be evaluated is necessary to develop a highly reliable system.
- Patent Document 1 discloses an evaluation means for how a fault input is propagated in a control program in the case where the influence is not obvious, that is, when the system operation and data are within a normal range. Absent.
- the purpose of the present invention is to evaluate how the fault input propagates in a program in which the system operation and data are within the normal range and the fault is not obvious, and to analyze the potential fault impact. It is an object to provide a failure effect evaluation system and an evaluation method that can be used.
- a failure impact evaluation system includes a controller simulator that simulates the operation of a controller for control, an input device that provides input data to the controller simulator, a simulation manager that integrally manages execution of the input device and the controller simulator, and the simulation manager
- the controller simulator holds a control program of the controller for control and an analysis unit, and the analysis unit is included in the control program.
- a propagation flag is given to a variable, a predetermined value is set as a failure input value for each variable, a bit is set, and the bit is propagated every time the variable is involved in an operation in the control program.
- Example 1 of this invention It is an example of the block diagram of the failure influence evaluation system based on Example 1 of this invention. It is an example of the control program which reads and calculates sensor data. It is an example of the control program which incorporated the analysis program in the control program of FIG. This is an example of variable type conversion that incorporates an analysis program into a control program. It is a concrete example of variable definition before and after incorporating an analysis program. It is a specific example of a failure database. It is an example of the definition of failure information. It is an example of the processing flow of a simulation manager. It is an example of a display screen which shows the change of propagation of the 1st fault value and the 2nd fault value. It is an example of a display screen which shows the change of propagation by the 1st failure time and the 2nd failure time. It is an example of the block diagram of the failure influence evaluation system based on Example 4 of this invention.
- a simulator for simulating the operation of a controller for a control controller including a ROM for storing a control program, a CPU for calculation, a RAM for storing data, and an I / O for an external interface, in addition to the control program
- a controller simulator in which the analysis program for generating data necessary for the analysis of the simulation execution result is also stored in the simulator ROM;
- An input device for providing input data to the controller simulator;
- a simulation manager that integrally manages execution of the input device and the controller simulator;
- a failure effect evaluation system comprising a display device that displays the output data of the simulator, A process of giving a bit to a variable in the control program, setting a bit by putting a predetermined value in a specific variable, and propagating the bit when this bit is involved in an operation in the control program and outputting the bit It has the analysis program containing.
- the present invention can be applied to control controllers in various fields such as power plants, railways, automobiles, and construction machines. It can also be applied to IT equipment infrastructure such as servers and storage. Embodiments of the present invention will be described below with reference to the drawings.
- FIG. 1 is an example of a configuration diagram of a failure effect evaluation system 100 according to an embodiment for carrying out the present invention.
- the failure impact evaluation system 100 includes a controller simulator 101, an input device 109, a simulation manager 110 that integrally manages execution of the input device and the controller simulator, and a display device 112.
- the controller simulator 101 is a simulator that simulates the operation of a control controller (not shown) that controls an actual machine.
- the input device 109 simulates an actual actuator or sensor, and generates an external input to the controller simulator 101 based on a command from the controller simulator 101.
- the failure impact assessment system 100 is realized, for example, by configuring the controller simulator 101 with a server and connecting other devices to the server via a communication network.
- the failure impact assessment system 100 may be configured as a wide area network distributed system including servers and terminals.
- the control controller whose operation is simulated by the controller simulator is, for example, an automobile engine controller, and the hardware whose operation is simulated by the input device 109 controls the opening of the throttle valve of the engine. For example, a motor or a sensor for detecting an angle.
- the control controller includes at least a ROM (Read Only Memory) for storing a control program, a CPU (Central Processing Unit) for calculating, a RAM (Random Access Memory) for storing data, and an I / O (Input / Output) for an external interface. Output Interface).
- the controller simulator 101 also includes at least the ROM 102 that stores the control program 106 and the analysis program 107, the CPU 103 that performs calculations according to the control program 106, the RAM 104 that stores data such as calculation results, and analog data of sensors, for example. And an I / O 105 serving as an interface for taking in an external input such as digital data from a digital device to the controller.
- the analysis program (analysis unit) 107 generates data necessary for analyzing the simulation execution result. That is, the analysis program (analysis unit) 107 sets a propagation flag by putting predetermined values (first value, second value,-) in specific or all variables in the control program 106, and sets the propagation flag in the control program 106.
- the propagation flag is propagated sequentially from the propagation source, and the propagation flag tracking processing function for outputting the propagation state is provided. Thereby, it is possible to track the propagation state of a specific variable within the control program.
- the analysis program further includes a processing function for giving a bit string including propagation path information such as the number of times of propagation, propagation time, propagation source, and propagation destination to the variable as an identifier.
- the RAM 104 holds various data 114 related to simulation execution and output data 108 of simulation results.
- the I / O 105 is connected to the input device 109, and the simulation is executed while performing synchronous communication and external input capturing processing between the input device 109 and the controller simulator 101 with a command from the simulation manager 110 as a trigger. Can proceed.
- the input device 109 simulates hardware (actual machines such as actuators, sensors, and circuits), and outputs a simulated value corresponding to the response of the real machine as the CPU 103 executes the simulation.
- Analysis conditions such as an operating environment are input to the simulation manager 110 from the user input terminal 113, for example.
- the simulation manager 110 can access a failure database 111 in which failure information and simulation conditions necessary for failure state simulation are stored. Based on such information, the simulation manager 110 can also give a fault value to the input device 109 to simulate the fault effect.
- the simulation manager 110 further has a function of instructing simulation conditions and a function of instructing the contents of the simulation result output data 108 via the analysis program 107 stored in the ROM 102 of the controller simulator 101.
- the display device 112 has an image processing function for visualizing the content of the output data 108 and displaying it on the screen.
- the output data 108 of the simulation result that has been executed can be displayed in a form that can be visually confirmed by the display device 112 such as a graph.
- the user can monitor the simulation result of the failure effect by operating the simulation manager 110.
- the input device 109 and the simulation manager 110 are realized by a computer and a program that operates on the computer, for example, like the controller simulator 101.
- control program 106 and the analysis program 107 will be described with reference to FIGS.
- FIG. 2 is an example of various control programs stored in the ROM 102 of FIG. 1, and is an example of a control program that reads and calculates sensor data.
- FIG. 2 shows a program description example of the main routine of the control program and the arithmetic processing called from the main routine. The contents of the description read and substitute the input values (variables a and b) from the sensor into integer type variables X1 and X2, find the sum using the subroutine processing add (), and assign to the variable Y The flow of processing is to do.
- FIG. 3 shows a description example of the control program (for analysis) when the analysis program 107 is incorporated by the simulation manager 110 with respect to the analysis target (original) control program (FIG. 2) for performing this series of processing.
- a region indicated by a broken line in FIG. 3 is a newly incorporated portion.
- these newly added program parts are collectively referred to as an analysis program 107.
- a new data array_packet that was not found in the (original) control program of FIG. 2 is defined as a structure (struct).
- the structure may include a plurality of pieces of information such as an integer type variable val and a bool type variable flg. Therefore, the assignment value to the int type variables X1 and X2 in FIG. 2 is changed to be assigned to the int type variable val in _packet.
- the bool type variable flg in _packet is set to be true for all the variables involved in the calculation so that the initial value is set to false and the propagation of the sensor input can be traced (hereinafter, referred to as “true”). Called the propagation flag).
- variable that sets the propagation flag includes the return value of the function and the setting value of the CPU register.
- the propagation trigger logical variable that is true for all the failure input values is set. Used separately from the propagation flag.
- the variable can be determined whether or not the variable has been propagated depending on whether the flg (propagation flag) of the variable is true or false. For example, if you want to verify by simulation whether a program that has already been developed as an engine controller for a car can be applied to other car models, you can evaluate some or all of the variables to find a potential failure of the program. Analyze the effects of On the other hand, if you want to verify by simulation whether the specifications of a specific actuator can be applied to other vehicles with slightly different specifications, you can evaluate the potential of the program by evaluating some variables related to the functions of the different specifications. To analyze the effects of typical failure. Based on such an analysis result, it can be determined whether the program can be applied to other vehicles or other vehicle types. Even if it is a program in the middle of development, it is possible to evaluate whether it can be applied to other vehicles or other vehicle types as long as it is confirmed that there is no influence of the failure.
- FIG. 4A is a specific example of variable type conversion in which an analysis program is incorporated into the (original) control program (400) (410) to form a control program (for analysis).
- An example of original variable definition before incorporating the analysis program 460 is an example of variable definition after incorporation (after conversion).
- the int type variable is converted into a structure_packet. As shown in FIG.
- the _packet includes a propagation flag (flg) indicating whether or not certain data has been propagated, an ID of the propagation source, that is, a propagation source ID, in addition to the numerical value (val) information originally possessed.
- a variable or function identifier (src), a propagation destination ID, that is, a propagation destination variable or function identifier (dst), a propagation time (time), and other information can be added.
- the definition of external I / O can be added.
- the propagation flag changes from false to true as in the setting example of Xn, and numerical values are assigned to the propagation source and destination identifiers and the propagation time, respectively. Note that these numerical value substitution processes are included in the function of the analysis program 107.
- FIG. 5A shows a specific example of the failure database 111
- 510 of FIG. 5B shows an example of the definition of failure information.
- the structure_packet similar to that used in FIGS. 4A and 4B can also be used in the definition of failure information.
- the meaning of each numerical value is as described below.
- val represents a failure value
- flg propagation trigger
- F1 to Fn failure inputs
- the failure ID (src) is an individual (1 to n) identifier for each failure (F1 to Fn)
- the input destination ID (dst) is an identifier of the input destination, that is, in the I / O 105 of the controller simulator 101.
- the input port and A / D converter for inputting are designated.
- the injection time (time) represents the time at which the fault value (val) of each fault input (F1 to Fn) is transmitted to the I / O 105.
- a definition relating to external I / O such as a sensor can be added to the definition of failure information.
- FIG. 6 is an example of a processing flow of the simulation manager 110 when executing the simulation.
- the simulation is started, first, all the failure information 510 defined in the failure database is read (P601). Then, all registered faults (F1 to Fn) are arranged in the order of the time (time) at which the faults are injected (P602).
- a simulation execution start command is issued to the controller simulator 101 (P603).
- it is determined whether or not the current simulation time is the end time (P604). If it coincides with the end time, the simulation is ended.
- the injection is performed for the fault (Fk) whose injection order is the earliest. It is determined whether or not it is time (P605). If it is not the injection time, the simulation time (sim_time) is incremented and updated (P608). If it is the injection time (time), the failure Fk is transmitted to the input device 109, the failure in the next injection sequence is read (P606), and the simulation time is updated (P608).
- the simulation manager 110 can transmit the failure information 510 stored in the failure database to the input device 109 at an appropriate timing by executing the series of processes described above. Note that the transmission state of the failure Fk is recorded and output as appropriate for display or the like (P607).
- the input device 109 that receives the input of the failure Fk at every injection time outputs an output in response to the analysis program 107.
- the control program 106 an output in response to the failure Fk from the input device 109 is received, a simulation calculation process is executed, and a propagation flag tracking process using a propagation trigger and a propagation flag is performed.
- the output data 108 is stored in the memory and output. That is, the output data 108 holds the result of the propagation flag tracking process together with the simulation result.
- a screen 700 displayed on the display device 112 represents a result of executing simulation by inputting two faults (first value and second value) into the control program to be analyzed. The difference in propagation of two faults is shown.
- the propagation result 710 displayed at the top of the screen is a normal value (nominal) input value to the input port I / O1, that is, a parameter in a range that satisfies a precondition given in advance, such as a design value. It is a propagation state when giving.
- a bit (propagation flag) is given to a specific variable X1 in the control program, and a bit (propagation flag) is set by putting a numerical value (Valu) in the specific variable X1.
- variable X1 When the numerical value (Valu) is in a normal state, the variable X1 with this bit (propagation flag) set is involved in the calculation with the functions Func1 and Func2 in the control program and changes to the variables Y1, X2 and Y3. , Propagate from I / O1 to I / O2. Further, the variable X1 is propagated sequentially while changing to the variables Y2 and X3 because the functions Func1 and Func3 in the control program are involved in the calculation. This normal state data is obtained and recorded as reference information in advance.
- the injection time is not changed with respect to the first value.
- the first value and the second value are parameters that do not satisfy a precondition given in advance.
- the variable X1 should be propagated as the variable X2 from the variable Y1 to the Func2 of the function Func1, as indicated by a thick frame It can be seen that it propagates as a variable X2 of Func5 and does not propagate to I / O2.
- the variable X1 is propagated as the variable X3 from the variable Y2 to the Func3 of the function Func1.
- the failure information has an influence on the propagation in the control program. In other words, if the parameter is changed from the value in the normal state to the failure value (first value), it can be seen that there is a potential failure effect.
- variable X1 should be propagated from the variable Y1 of the function Func1 to the function Func2, as shown by a thick frame. , It propagates as a variable X4 of Func6, and does not propagate to I / O2.
- the variable X1 is propagated from the variable Y2 to Func6 as the variable X5. That is, when the parameter is changed from the normal state value to the second value, it can be seen that there is a potential failure effect. Further, the propagation result 720 and the propagation result 730 indicate that there is a difference in the influence of the failure due to the difference in the value of the failure input.
- the propagation result 810 displayed at the top of the screen is a propagation state between Func1, Func2, Func3, and I / O2 when the input value of the normal state (Nominal) is given to the input port I / O1.
- the propagation result 820 and the propagation result 830 indicate that there is a difference in the influence of the failure due to the difference in the timing of the failure input. For example, it is possible to evaluate what kind of influence occurs when the response characteristics of the actuator or sensor exceed a range assumed as a precondition.
- the simulation manager 110 described in the first embodiment may be provided with a filtering function for performing condition determination.
- This filtering function determines whether or not the output data 108 is propagated to each variable and function and whether or not the variable is within the range of allowable values and thresholds set in advance for each variable. Whether to display the propagation path to 112 is selected.
- This analysis result can also be confirmed on the screen. For example, as a result of the condition determination, if the propagation result 720 in FIG.
- the propagation result 730 is displayed as “potentially affected by failure”. Is not displayed.
- the target to be examined by the user is narrowed down, so that a more advanced analysis of the propagation state becomes possible.
- the analysis can be automated and efficient.
- the controller simulator 101 itself described in the first embodiment includes a failure simulation function and a simulation manager function for integrated management of the execution of the controller simulator.
- the display device 112 may also be owned. This eliminates the need for communication between the simulation manager and the controller simulator for preprocessing (P601 to P603 in FIG. 6) and the like, and can suppress overhead.
- the present invention can be applied not only to the simulator (microcomputer simulator) of the control program described in the first embodiment, but also to a simulator that simulates hardware (input device of the first embodiment) corresponding to an actual machine (actuator).
- the present invention can be applied to both a microcomputer simulator corresponding to a controller for controlling an engine of an automobile and a simulator (mechanical simulator) of an engine model controlled by the controller for engine control.
- FIG. 9 shows a configuration example of a failure effect evaluation system according to the fourth embodiment of the present invention.
- the failure effect evaluation system 900 includes an apparatus model simulator 910 and a microcomputer simulator 920.
- the apparatus model simulator 910 includes a mechanical / electronic simulator 911 and an analysis program 912.
- the microcomputer simulator 920 has a control program 921 and an analysis program 922 having the same configuration as in the first embodiment.
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Abstract
Description
制御プログラムを格納するROMと演算をするCPUとデータを格納するRAMと外部インターフェイスのI/Oを含む制御用コントローラに対し、前記コントローラの動作を模擬するシミュレータであって、前記制御プログラムに加えて、シミュレーションの実行結果の解析に必要なデータを生成する解析プログラムも前記シミュレータ内ROMに格納されたコントローラシミュレータと、
前記コントローラシミュレータに入力データを与える入力装置と、
前記入力装置および前記コントローラシミュレータの実行を統合管理するシミュレーションマネージャと、
前記シミュレーションマネージャが参照する故障情報及びシミュレーション条件が格納されたデータベースと、
前記シミュレータの出力データを表示する表示装置から構成される、故障影響評価システムであり、
前記制御プログラム内の変数にビットを与え、特定の変数に所定の値を入れてビットを立て、このビットが前記制御プログラム内で演算に関与すると該ビットを伝搬させ、該ビットを出力する処理を含む前記解析プログラムを持つ、ことを特徴とする。
以下、本発明の実施例について図面を用いて説明する。
図1は、本発明を実施するための形態にかかる故障影響評価システム100の構成図の例である。故障影響評価システム100は、コントローラシミュレータ101と、入力装置109と、この入力装置及びコントローラシミュレータの実行を統合管理するシミュレーションマネージャ110と、表示装置112を備えている。コントローラシミュレータ101は、実機を制御する制御用コントローラ(図示略)の動作を模擬するシミュレータである。入力装置109は、実機のアクチュエータやセンサを模擬しており、コントローラシミュレータ101からの指令に基づき、コントローラシミュレータ101に対する外部入力を生成する。
図3に破線で示した領域が、新たに組み込まれた部分である。図3の制御プログラムにおいて、これらの新たに追加したプログラム部分をまとめて解析プログラム107とよぶことにする。図3の(解析用)制御プログラムでは、まず、図2の(原)制御プログラムにはなかった新たなデータ配列_packetが構造体(struct)として定義されている。この構造体には、整数型の変数val及びbool型の変数flgなど、複数の情報を含んでよい。そこで、図2におけるint型変数X1、X2への代入値は_packet内のint型変数valに代入するように変更する。ここで、サブルーチンの演算処理add()には変更を加える必要はない。
例えば、自動車のエンジンコントローラとして既に開発されたプログラムを、他の車種にも適用できるかを、シミュレーションで検証したい場合に、一部若しくはすべての変数について評価することで、そのプログラムの潜在的な故障の影響を解析する。一方、同じ車種で特定アクチュエータの仕様が若干異なる他の車にも適用できるかをシミュレーションで検証したい場合には、異なる仕様の機能に関係する一部の変数について評価することで、そのプログラムの潜在的な故障の影響を解析する。このような解析結果を基に、上記プログラムを、他の車あるいは他の車種にも適用できるかが判定できることができる。開発途中のプログラムで有っても、同様に、故障の影響の無いことが確認された範囲で、他の車あるいは他の車種にも適用できるかの評価を行うことができる。
101 コントローラシミュレータ
102 ROM(Read Only Memory)
103 CPU(Central Processing Unit)
104 RAM(Random Access Memory)
105 I/O(Input Output Interface)
106 制御プログラム
107 解析プログラム
108 出力データ
109 入力装置
110 シミュレーションマネージャ
111 故障データベース
112 表示装置
700 表示装置の画面
800 表示装置の画面
900 故障影響評価システム。
Claims (16)
- 制御用コントローラの動作を模擬するコントローラシミュレータと、
前記コントローラシミュレータに入力データを与える入力装置と、
前記入力装置および前記コントローラシミュレータの実行を統合管理するシミュレーションマネージャと、
前記シミュレーションマネージャが参照する故障情報及びシミュレーション条件が格納されたデータベースとを含み、
前記コントローラシミュレータは、
前記制御用コントローラの制御プログラムと、解析ユニットとを保持しており、
前記解析ユニットは、前記制御プログラム内の変数に伝播フラグを与え、該変数に故障入力値として各々所定の値を入れてビットを立て、該変数が前記制御プログラム内で演算に関与した都度に該ビットを伝搬させ、該ビットの伝搬状況を追跡して、その結果を出力する伝播フラグ追跡処理機能を有する
ことを特徴とする故障影響評価システム。 - 請求項1において、
前記解析ユニットが、前記ビットに加えて、伝搬回数や伝搬時刻、伝搬元や伝搬先など伝搬経路の情報などを含むビット列を識別子として前記変数に与える機能を有する
ことを特徴とする故障影響評価システム。 - 請求項2において、
前記解析ユニットが、前記ビットに加えて、前記伝播フラグとは別個の論理変数である伝播トリガを前記変数に与える機能を有し、
前記伝播トリガは、前記故障入力値の全てに対しtrueとなり、
前記伝播フラグは、前記制御プログラム内の少なくとも1つの変数に対して使用され、前記伝搬の有無でtrueかfalseとなる
ことを特徴とする故障影響評価システム。 - 請求項1において、
前記解析ユニットが、前記各変数及び前記関数への伝播有無や、前記各変数に事前に設定した許容値・閾値の範囲内か否かなどの条件判定を行い、前記ビットを伝搬させるか否かを決定するフィルタリング機能を有する
ことを特徴とする故障影響評価システム。 - 請求項2において、
前記入力装置は、前記制御用コントローラの制御対象である実機の動作を模擬するためのハードウェアやソフウェアであり、
前記コントローラシミュレータからの指令に基づき、前記コントローラシミュレータに対する外部入力を生成する
ことを特徴とする故障影響評価システム。 - 請求項5において、
前記データベースは、試験する故障値と入力先I/Oと入力時刻の情報を含み、
前記シミュレーションマネージャが、前記データベースを参照し、前記入力装置への指令内容を決定する
ことを特徴とする故障影響評価システム - 請求項6において、
前記シミュレーションマネージャが、前記データベースに加えて、前記コントローラシミュレータの実行状態にもとづくランタイムでの条件判定により、
前記入力装置への前記故障入力値の入力のタイミングを決定する
ことを特徴とする故障影響評価システム - 請求項2において、
前記シミュレーションマネージャで制御され、前記コントローラシミュレータの出力データを表示する表示装置を備えており、
該表示装置は、前記特定の変数に関して、前記制御プログラム内における前記演算に関与した各関数と、該演算に伴う前記ビットの伝播状況とを、画面に表示する機能を有する
ことを特徴とする故障影響評価システム。 - 請求項7において、
前記入力装置から入力された第1の値と第2の値で前記コントローラシミュレータにおけるシミュレーションを実行し、該シミュレーションの結果として、前記ビットの伝搬経路の違いを前記表示装置に表示する
ことを特徴とする故障影響評価システム。 - 請求項4において、
前記シミュレーションマネージャで制御され、前記コントローラシミュレータの出力データを表示する表示装置を備えており、
前記シミュレーションマネージャにおいて、前記条件判定の結果によって、前記表示装置への前記変数の伝播経路の表示可否を選別する
ことを特徴とする故障影響評価システム。 - 請求項1において、
前記制御用コントローラは、
制御プログラムを格納する第1のROMと、演算を実行する第1のCPUと、データを格納する第1のRAMと、外部インターフェイスの第1のI/Oを含み、
該制御用コントローラの動作を模擬する前記コントローラシミュレータは、前記制御プログラム及び前記解析ユニットを構成する解析プログラムを格納する第2のROMと、前記制御プログラムに従って演算を行う第2のCPUと、演算結果等のデータを格納する第2のRAMと、外部入力を該コントローラに取り込むインターフェイスとなる第1のI/Oとを備えている
ことを特徴とする故障影響評価システム。 - 請求項1において、
前記コントローラシミュレータが、
故障模擬機能及び前記シミュレーションマネージャの機能、前記故障データベース、及び前記表示装置を保有している
ことを特徴とする故障影響評価システム。 - 制御用コントローラの動作を模擬するマイコンシミュレータと、
前記制御用コントローラの制御対象であるアクチュエータの動作を模擬するメカシミュレータと、
前記マイコンシミュレータ及び前記メカシミュレータに入力データを与える入力装置と、
前記入力装置および前記マイコンシミュレータ及び前記メカシミュレータの実行を統合管理するシミュレーションマネージャと、
前記シミュレーションマネージャが参照する故障情報及びシミュレーション条件が格納されたデータベースとを備え、
前記マイコンシミュレータ及び前記メカシミュレータは、各々、
制御プログラムと、解析ユニットとを保持しており、
前記解析ユニットは、前記制御プログラム内の変数に伝播フラグを与え、該変数に故障入力値として各々所定の値を入れてビットを立て、該変数が前記制御プログラム内で演算に関与した都度に該ビットを伝搬させ、該ビットの伝搬状況を追跡して、その結果を出力する伝播フラグ追跡処理機能を有する
ことを特徴とする故障影響評価システム。 - 故障影響評価システムを用いた評価方法であって、
前記故障影響評価システムは、
制御用コントローラの動作を模擬するコントローラシミュレータと、
前記コントローラシミュレータに入力データを与える入力装置と、
前記入力装置および前記コントローラシミュレータの実行を統合管理するシミュレーションマネージャと、
前記シミュレーションマネージャが参照する故障情報及びシミュレーション条件が格納されたデータベースとを含み、
前記コントローラシミュレータは、
前記制御用コントローラの制御プログラムと、解析ユニットとを保持しており、
前記制御プログラム内の変数に伝播フラグを与え、
該変数に故障入力値として各々所定の値を入れてビットを立て、
該変数が前記制御プログラム内で演算に関与した都度に該ビットを伝搬させ、該ビットの伝搬状況を追跡して、その結果を出力する
ことを特徴とする故障影響評価方法。 - 請求項13において、
前記解析ユニットが、前記ビットに加えて、前記伝播フラグとは別個の論理変数である伝播トリガを前記変数に与える機能を有し、
前記伝播トリガは、前記故障入力値の全てに対しtrueとなり、
前記伝播フラグは、前記制御プログラム内の少なくとも1つの変数に対して使用され、前記伝搬の有無でtrueかfalseとなる
ことを特徴とする故障影響評価方法。 - 請求項13において、
前記シミュレーションマネージャで制御され、前記コントローラシミュレータの出力データを表示する表示装置を備えており、
前記入力装置から入力された第1の値と第2の値で前記コントローラシミュレータにおけるシミュレーションを実行し、該シミュレーションの結果として、前記ビットの伝搬経路の違いを前記表示装置に表示する
ことを特徴とする故障影響評価方法。
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