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    Analyzing fault effects in the 32-bit OpenRISC 1200 microprocessor

    , Article ARES 2008 - 3rd International Conference on Availability, Security, and Reliability, Proceedings, 4 March 2008 through 7 March 2008, Barcelona ; 2008 , Pages 648-652 ; 0769531024 (ISBN); 9780769531021 (ISBN) Mehdizadeh, N ; Shokrolah Shirazi, M ; Miremadi, S. G ; Sharif University of Technology
    This paper presents an analysis of the effects and propagation of faults in the open-core 32-bit OpenRISC 1200 microprocessor. The analysis is based on a total of 13,000 transient faults injected into 65 parts of the CPU module in the OpenRISC 1200 core described at the RTL model. A comparison of the effects of faults on the various parts of the CPU including the pipeline's registers, the CPU component such as the register file, the control unit, and the ALU, and the data and address buses is done. It is shown that about 30%, 40% and 27% of injected faults terminated in address, data, and control errors respectively. About 28% of all injected faults resulted in failures. © 2008 IEEE  

    Fault effect analysis of the exhaust manifold leakage for a turbocharged spark ignition engine

    , Article Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering ; Vol. 228, issue. 8 , 2014 , pp. 970-984 ; ISSN: 09544070 Salehi, R ; Vossoughi, G ; Alasty, A ; Sharif University of Technology
    Fault monitoring in internal-combustion engines is crucial for keeping the vehicle performance within the acceptable standards of emission levels and drivers' demands. This paper analyses how a vehicle's performance and engine variables are affected by a leakage fault in the exhaust manifold. The threshold leakage that causes the vehicle to exceed the emission standards is determined for a class M1 vehicle tested on a chassis dynamometer over the New European Driving Cycle. It is shown that, when a leakage of 6 mm diameter on the exhaust manifold is introduced, the vehicle emissions exceed those specified in the European 2013 on-board diagnostics standard. In addition, the effects of the... 

    Condition Monitoring and Fault Diagnosis of Anti-Lock Brake System (ABS)

    , M.Sc. Thesis Sharif University of Technology Eskandarian, Mehdi (Author) ; Behzad , Mehdi (Supervisor) ; Hoviattalab, Maryam (Supervisor)
    The purpose of this project is fault diagnosis of anti-lock brake system with mechatronic approach. To do this, first an appropriate model of the system has been developed. After validating the model, the effects of change in some parameters that indicates the occurrence of a fault in the system are used to examine the behavior of the system in a model-based manner. With this method, it can be analyzed that how a specific fault will impact other system parameters. in fact; the effect of various defects in the system can be detected.
    To do this, four common faults such as fault occurrence in hydraulic pump and solenoid valves, air presence and oil leakage in the system are implemented... 

    Fault effects in FlexRay-based networks with hybrid topology

    , Article ARES 2008 - 3rd International Conference on Availability, Security, and Reliability, Proceedings, 4 March 2008 through 7 March 2008, Barcelona ; 2008 , Pages 491-496 ; 0769531024 (ISBN); 9780769531021 (ISBN) Dehbashi, M ; Lari, V ; Miremadi, S. G ; Shokrollah Shirazi, M ; Sharif University of Technology
    This paper investigates fault effects and error propagation in a FlexRay-based network with hybrid topology that includes a bus subnetwork and a star subnetwork "The investigation is based on about 43500 bit-flip fault injection inside different parts of the FlexRay communication controller. To do this, a FlexRay communication controller is modeled by Verilog HDL at the behavioral level. Then, this controller is exploited to setup a FlexRay-based network composed of eight nodes (four nodes in the bus subnetwork and four nodes in the star subnetwork). The faults are injected in a node of the bus subnetwork and a node of the star subnetwork of the hybrid network. Then, the faults resulting in... 

    A new genetic algorithm method for optimal coordination of overcurrent and earth fault relays in networks with different levels of voltages

    , Article 2009 IEEE Bucharest PowerTech: Innovative Ideas Toward the Electrical Grid of the Future, 28 June 2009 through 2 July 2009, Bucharest ; 2009 ; 9781424422357 (ISBN) Kamangar, S. S. H ; Abyaneh, H. A ; Chabanloo, R. M ; Razavi, F ; Sharif University of Technology
    In this paper, a new genetic algorithm (GA) method is presented to solve the optimization problem in coordination of overcurrent and earth fault relays. In addition to optimal coordination of overcurrent relays, earth fault relays are also coordinated by GA, considering critical fault condition for the relays located in two sides of network's transformers. The objective function is developed by adding new terms that are the constraints related to the coordination of overcurrent and earth fault relays in critical fault conditions considering different winding arrangements of transformers. The paper concluded by the results of a study carried out on a sample power network. The results...