This work presents a practical approach of designing a functionally safe ECU for automotive application by implementing the Model Based Development (MBD) methodology. Functional safety (FuSa) in automotive can be achi...
This work presents a practical approach of designing a functionally safe ECU for automotive application by implementing the Model Based Development (MBD) methodology. Functional safety (FuSa) in automotive can be achieved by strictly following the processes of electrical and electronic systems development as given in the ISO 26262. The scope of FuSa encompasses the risks emerging from systematic failures and random hardware failures. One approach to mitigate these failures is the Model Based Development (MBD) on which the ISO 26262 provides guidance. This approach enables to model an ECU and accelerates an IP creation by automatic RTL code generation for rapid prototyping on an FPGA level. In this work the MBD is implemented in accordance to the ISO 26262 to design and test a hardware model of an embedded ECU. The embedded Design under Test (DUT) is simulated and its output verified in Matlab/Simulink. Upon successful results, the RTL codes of the DUT are generated for a target FPGA. The RTL codes are simulated and the functionality of the DUT is verified at the FPGA level.
As the video CODECs become complex increasingly according to the convergence of digital equipments designed for different kinds of specific purposes, the demand of higher performance for video processing is continuous...
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Nowadays, many noticeable continues efforts are taken in the vehicle industry to develop robust intelligent systems that control and monitor the vehicles during operational time to lower the side effects of some abnor...
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Nowadays, many noticeable continues efforts are taken in the vehicle industry to develop robust intelligent systems that control and monitor the vehicles during operational time to lower the side effects of some abnormal conditions such as sliding and spinning; because of their main role in affecting the human safety and the vehicle life-time as well as the costs related to maintenance. Therefore, the importance of manipulating and controlling these special statuses with respect to safety and cost are the main motivations behind conducting this research work. In this paper a conceptual prototype of a safety-related platform for monitoring and recognizing the vehicles states by means of vibration sensors incorporated with incremental rotary encoders is presented. Additionally, the proposed approaches and algorithms to detect the vehicle status based on the captured sensory data are also presented.
When performance tools are used to analyze an application with thousands of processes, the data generated can be bigger than the memory size of the cluster node, causing this data to be loaded in swap memory. In HPC s...
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The international standard IEC/61508 provides the developer with guidelines for the design and implementation of safety related systems according to this standard. This standard states qualitative and quantitative cri...
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ISBN:
(纸本)9781424435890
The international standard IEC/61508 provides the developer with guidelines for the design and implementation of safety related systems according to this standard. This standard states qualitative and quantitative criteria in order to judge a safety related system in such a way that safety critical applications can be implemented. This paper details a quantitative criterion which is the probability of failure on low demand, known as PFD. After an introduction into this topic, the principle steps to calculate the probability of failure with the help of reliability block diagrams for different hardware architecture will be detailed and presented. The PFD-equations will be derived for a 1oo1 architecture with the help of MacLaurin series.
In recent years, Pulse Transit Time (PTT) - based non-invasive continuous blood pressure monitoring systems have been investigated extensively. But the most relevant studies did not pay attention to the safety require...
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In recent years, Pulse Transit Time (PTT) - based non-invasive continuous blood pressure monitoring systems have been investigated extensively. But the most relevant studies did not pay attention to the safety requirement of the system. In this paper a method is proposed to model the safety-related system for continuous noninvasive blood pressure monitoring. The V model, 1oo2 system and safe Bluetooth communication are used to enhance the safety of the system.
This paper proposes a continuous, non-invasive blood pressure monitoring system concept, which uses a safety microprocessor to connect sensors for building a body sensor network. The changes in Pulse Transit Time (PTT...
ISBN:
(纸本)9781467347358
This paper proposes a continuous, non-invasive blood pressure monitoring system concept, which uses a safety microprocessor to connect sensors for building a body sensor network. The changes in Pulse Transit Time (PTT) can be detected with the sensor network. The microprocessor gathers the PTT and other vital signs of the patient to derive changes in blood pressure. Through the new Bluetooth protocol for safety systems, the current blood pressure value can be sent to a variety of terminals present in the wireless network, such as mobile phone, PC and medical monitoring systems. The 1oo2 architecture of the used microprocessor can provide high safety to a rating of safety integrity level 3 (SIL3), thus the whole network can meet the safety required in medical care systems.
This paper presents a new tuning method based on model parameters identified in closed-loop. For classical controllers such as PI(D) controllers a large number of simple tuning methods for various application areas ex...
This paper presents a new tuning method based on model parameters identified in closed-loop. For classical controllers such as PI(D) controllers a large number of simple tuning methods for various application areas exist. However, when it comes to designing a generalised predictive controller (GPC) four parameters have to be specified. To choose those parameters is not a trivial task since they are not directly related to control or regulation performance. The presented tuning method exploits model-parameters to select suitable controller parameters. Additionally, a Rhinehart filter is incorporated in the design to decrease the impact of noise, therefore, a fifth parameter has to be optimised. The proposed method has been tested in simulation and on a real system.
In this paper, the Test Pattern Generation (TPG) with a new simple hybrid (dynamic and static) compaction technique for combinational logic circuits and systems is presented. Digital systems are implemented nowadays o...
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ISBN:
(纸本)9781467384612
In this paper, the Test Pattern Generation (TPG) with a new simple hybrid (dynamic and static) compaction technique for combinational logic circuits and systems is presented. Digital systems are implemented nowadays on an advance VLSI technology, which is called Field Programmable Gate Array (FPGA). The test procedure requires a deliberate introduction of faults in the system Under Test (SUT). FPGA circuits and systems are developed and written in Hardware Description Languages (HDLs). In addition, a novel method is also proposed and implemented in order to intentionally inject faults in the Verilog HDL code design of the SUT. It covers all possible fault locations in the SUT. This approach provides high quality compact test vectors and efficient memory utilization in comparison with other state-of-the-art methods. Not only are the hardness of individual faults and the sensitiveness of fault locations determined, but also their effectiveness is proposed in the fault tolerance strategy.
This paper is concerned with the design procedures of an automated testing tool, developed in Matlab ® /Simulink ® environment, that performs software verification during runtime on a PLC (Programmable Logi...
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This paper is concerned with the design procedures of an automated testing tool, developed in Matlab ® /Simulink ® environment, that performs software verification during runtime on a PLC (Programmable Logic Controller) or so called HiL test (Hardware-in-the-Loop) for model-based development of control applications. In addition to checking the “semantic” or “functional” correctness of the automatically generated C++ - Code with RTW (Real Time Workshop ® ) for algorithms designed and developed in Simulink ® on hardware targets, the tool compares results obtained from the HiL test with the results of the MiL test (Model-in-the-Loop) performed in early stage of development for the same developed application. The main purpose behind this work is to develop reliable software that fulfil system requirements and to test its behaviour during realtime hardware simulation, in order to achieve the validation step which represents the terminating - step of almost all projects.
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