Single fault automatic injection method based on pspice AD circuit simulation
A technology of fault injection and automatic injection, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of economic loss, low efficiency, cumbersome operation, etc., to save labor costs, improve efficiency and accuracy, Overcome inefficiencies
Inactive Publication Date: 2017-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
Hardware fault injection can better simulate actual hardware faults, and there is no need to develop a fault injection model, but the test device is complex and expensive, and it is difficult to accurately control the time and location of fault injection, which is likely to cause damage to circuit devices and bring economic losses
Software fault injection is flexible and convenient, easy to implement, low cost and can reduce development time, without damage to hardware circuit devices, but cannot inject faults into software inaccessible locations, and can only partially simulate actual fault conditions
The fault injection technology based on circuit simulation can inject faults into any position in the simulation model, avoiding the limitations of software fault injection, and at the same time, compared with hardware fault injection, it can avoid device or system damage caused by injected faults. In addition, It also has the advantages of low cost and short simulation time, but at present, manual injection is the main method, which is cumbersome to operate, highly dependent on personnel, and inefficient
Method used
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Embodiment 1
[0097] Embodiment 1: The schematic diagram of the circuit Timer_generate of the example circuit to be analyzed is as follows Figure 4 As shown, the function of the circuit Timer_generate is to generate a clock signal. The circuit contains multiple resistors, capacitors, and other digital devices such as 74AC161.
[0098] By using the netlist of the circuit schematic diagram provided in this embodiment, according to the above steps 1 to 5, the automatic injection of single fault traversal faults is completed, and the specific steps are as follows:
[0099] Step 1: Based on the PSpice AD syntax, analyze the structure of the circuit schematic netlist, and extract the component unit list of the example circuit Timer_generate schematic netlist by reading the circuit schematic netlist line by line. The list contains the component unit identification , component unit value and component unit type name, as shown in Table 5.
[0100] Table 5 List of components extracted by circuit...
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The invention discloses a PSpice (P simulation program with integrated circuit emphasis) AD (analogue / digital) circuit simulation-based single-failure automatic injection method. According to the method, single-failure automatic traversing injection on each output pin of each component unit in all different failure modes is realized in a schematic circuit diagram netlist, and the single-failure injection of the whole circuit can be finished by only one operation, so that the method has the advantages of automatic and rapid traversing failure injection of the failure modes, the problems of low efficiency, high error rate and the like of manual failure injection are solved, the labor cost is lowered, and the failure injection efficiency and accuracy are improved.
Description
technical field [0001] The invention relates to the field of circuit fault simulation and reliability analysis, in particular to a single fault automatic injection method based on PSpice AD circuit simulation. Background technique [0002] Fault simulation technology is an analysis technology that combines fault modeling, fault injection and system performance simulation, and is an effective auxiliary method to realize circuit reliability design. Fault injection is the process of artificially injecting faults into the circuit according to the fault mechanism of the device and according to certain strategies. Then the simulation output of the circuit in the fault mode is obtained through circuit simulation, and the circuit fault simulation is completed. [0003] In aviation, aerospace, military industry, automobile, medical and other fields, the reliability of circuits is extremely high, and the failure of one component may cause damage to the entire system, and even cause...
Claims
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IPC IPC(8): G06F17/50
Inventor 何春黎亮朱娟曾希雯
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA