Systems theory and design

The word system is defined in the Oxford Dictionary as a whole composed of parts in orderly arrangement according to some scheme or plan. In present day parlance, we tend to think of systems as connected with computers. However, the word is used in a wider sense in Operational Research to imply the building of conceptual and mathematical models to simulate problems and provide quantitative or qualitative information to executives who have to control operations, e.g. a maintenance system, a system governing purchase and use of protective clothing, a training system etc. 

In this chapter, only an outline can be given of the concepts underlying systems theory and the theory will be presented mainly as an aid to clear thinking. The mathematical techniques associated with quantifying it can be found in textbooks of operational research. 

The essential components of a systems model are goals or objectives, inputs, outputs, interactions between constituent parts of the system (e.g. storage, decision making, processing etc.) and feedback. 

3 Evaluate and test the system using already solved problems to check that tire model gives the correct answer. 

It is a useful exercise to consider how the safety adviser fits into the above system and which activities he should be involved in. 

---

Astrom, K. J., and Wittenmark, B., Computer Control Systems Theory and Design. Prentice Hall, 1984. 

Chen, C.-T., 1995. Linear System Theory and Design. Oxford University Press, Inc., Oxford. 

Astrom K.J., Wittenmark B., 1990. Computer-controlled systems theory and design. 2 ed. Englewood Cliffs Prentice Hall, cop. 

Astrom, KJ. and Wittenmark, B. 1984. Computer Controlled Systems—Theory and Design. Prentice-HaU, Englewood Cliffs, Nf... 

AW90] Astrom J. and Wittenmark B. (1990) Computer-Controlled Systems, Theory and Design. Prentice-Hall, Englewood Cliffs, N.J. 

Qien C-T (1999) Linear system theory and design, 3rd edn. Oxford University Press, Oxford... 

Long mans, Green, Londonfl 919) D)US Ordnance Dept Document No 2035, "Theory and Design of Recoil Systems and Gun Carriages/ Engineer Reproduction Plant, Washing ton, DC (1921) E)M.J. Pedersen, ArOrdn 15,347-51(1935)... 

A. Arkhanov, I. Marfenina, Ye. Mikulin, Theory and Design of Cryogenic Systems, Mir Publishers, Moscow, 1981. 

In this section we will demonstrate the use of water sprays as a postrelease mitigation measure. The theory and design of water spray systems has been detailed in Chapter 4. The scenario will involve the accidental release of hydrofluoric acid (HF) from a storage tank. Again we will be considering the distance to reach the ERPG-2 concentration for HF of 20 ppm (AIHA, 1992). 

Parasuraman, R., Bahri, T, Deaton, J. E., Morrison, J. G., Barnes, M. (1992). Theory and design of adaptive automation in aviation systems (Progress Report No. NAWCADWAR-92033-60). Warminster, PA Naval Air Warfare Center, Aircraft Division. 

IT systems theory and practice (c) An ability to design, implement, and evaluate a computer-based system, process, component, or program to meet desired needs (g) An ability to analyze the local and global impact of computing on individuals, oiganiza-tions, and society (j) An ability to use and apply current technical concepts and practices in the core information technologies The student outcomes (c), (g), and (j) address the skills required to analyze and develop complex systems according to international best practices... 

Nonimaging optics Optical theory and design that departs from traditional methods and develops techniques for maximizing the collecting power of concentrating elements and systems. 

When it comes to interconnecting audio systems, theory and practice often go in divergent directions. A system design may look elegant on paper, yet turn out to be a nightmare when all of the hardware is installed and turned on. Strict adherence to some basic wiring conventions will help prevent equipment interfacing problems ... 

Afridi MY, Suehle JS, Zaghloul ME, Tiffany JE, Cavicchi RE (2001) Implementation of CMOS compatible conductance-based micro-gas-sensor system. In Proceedings ECCTD Ol, European conference on circuit theory and design, Espoo, Finland, 28-31 Aug, pp 381-384... 

Solodovnikov V.V., Tumarkin V I. Complexity theory and design of control systems. - Moscow Science, 1990. 

---