ملخص: For a variety of reasons, the need for measures to improve the safety of process plant and the reliability of their control systems is becoming increasingly necessary, especially in the context of computer control. The evaluation of their reliability requires the determination of the failure mechanisms followed by a quantification of the faillure rate. This process, which is usually carried out using systematic techniques is time consuming, requires a large amount of experienced man power and, as such, is costly. In order to reduce the cost and time of this process, it is required that reliability analysis techniques be developed that are both intuitive and easy to use for a wide range of applications. The work reported upon in this rhesis is in two parts. Firstly, a review of various safety and reliability analysis techniques is given. The computational aspects of the most widely used of these techniques, fault tree analysis, are also discussed.And secondly, an appraisal of a recently developed technique, due to Hossi and Niemela, which is of particular significance in the assessment of the reliability of control systems. Its theoretical basis, the modelling technique and the computer program in which the technique is implemented are appraised. It is shown, by means of simple examples, that the technique is very flexible and suitable for a variety of engineering systems. A case study involving the computer control of a bath reactor is presented to illustrate further the modelling technique. The ease and flexibility of construction of the reliability model are also demonstrated. Finally, the limitations of this approach have been discussed.

طبعة: Leeds, England: University of Leeds
لغة: إنجليزية
الوصف المادي: 152 p. ill. ;30 cm
الشهادة: Master
مؤسسة مناقشة الرسالة: University of Leeds

ملاحظة: Bibliogr.pp.146-152