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  • 1
    Electronic Resource
    Electronic Resource
    Studies on the Digraph-Based Approach for Fault-Tree Synthesis. 1. The Ratio-Control Systems (1994)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 33 (1994), S. 1520-1529 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00030a012
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    New developments of the digraph-based techniques for fault-tree synthesis (1992)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 31 (1992), S. 1490-1502 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00006a010
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on the Digraph-Based Approach for Fault-Tree Synthesis. 2. The Trip Systems (1994)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 33 (1994), S. 1700-1707 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00031a010
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A simple design strategy for fault monitoring systems (1993)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 39 (1993), S. 1146-1163 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A simple strategy is developed for the design of model-based fault-monitoring systems. Several new features allow this approach suitable for practical applications. The core of the suggested monitoring system is a parallel parameter estimation method designed to reduce the chance of bias. Two important criteria, diagnostic observability and diagnostic resolution, are adopted to evaluate the performances of alternative designs. By following a systematic procedure, it is possible to determine the best sensor locations in a complex chemical process based only on the structural informations of the system model. After selecting the most appropriate measurement variables, diagnostic resolution can be enhanced further by exploiting additional insights gained from analysis of the physical meanings of the model parameters and by comparing the fault patterns in diagnosis. Several effective on-line implementation techniques are also proposed to minimize computation for the estimation algorithm. The correctness and efficiency of the suggested design strategy are demonstrated by the simulation results in examples.
    Additional Material: 28 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690390707
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Prototype for intergated hazard analysis (1997)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 43 (1997), S. 1494-1510 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The prototype of an integrated hazard-analysis system (IHAS) was developed. Essentially any process can be analyzed with this software if the system topology is correctly supplied by the user. Since all altorithms adopted are digraph-based, the system digraph must be constructed first with IHAS. The embedded feedforward and feedback loops are then identified and classified. On the basis of this information, three widely accepted hazard-assessment procedures - FTA, ETA, and HAZOP - can be performed automatically. From the results obtained in practical applications, one can see that the quality. From the results obtained in practical applications, one can see that the quality of hazard analysis is indeed improved if IHAS can be used as an aid to the human experts.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690430613
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Optimal alarm logic design for mass-flow networks (1997)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 43 (1997), S. 3021-3030 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An optimal alarm-system design method, which takes full advantage of the inherent hardware and spatial redundancies in a mass-flow network, is proposed. In particular, systematic procedures are developed to identify independent measurement methods for the flow rate of any stream in the process and to synthesize corresponding alarm generation logic. To implement the suggested alarm strategy, the formulas for evaluating conditional probabilities of type I and II mistakes are also derived. The results of applying the proposed alarm system to the application example show that the approach taken in this work is effective in suppressing the latter mistakes. Further, this system is superior to any of the existing alarm techniques in the sense that it can be appropriately tailored to minimize the expected loss due to misjudgments in generating alarms.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690431114
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Statistical operating strategies for charging batch reactors (1996)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 42 (1996), S. 1304-1318 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Two critical decisions must be made in the charging sequence of batch reactors: target setting and alarm generation. A number of statistics-based strategies are proposed in this article to perform these tasks. The off-line and on-line target setting procedures developed in this work can be adopted to increase the profit margin of any given batch process without sacrificing reliability. A synthesis method for building optimal alarm logic is also described in detail. Monitoring systems constructed according to this suggested approach are effective in reducing the probability of undetected faulty batches. Extensive simulation studies show that the proposed strategies are suitable for application of manufacturing high-value-added products, which is a prevailing practice in batch processes.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690420511
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    Paper (German National Licenses)
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