الفهرس 
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Abstract
Parameters varying systems (PVS) refers to those systems that incorporate changes under some natural or man-made causes conditions. Symbolic analysis is a generic technique exploited to produce symbolic expressions for any system regarding its parameters and variables. Although theoretically symbolic analysis can be considered as a good complement to numerical analysis, it is still facing some difficulties such as the cost of hardware implementation measured by computational and communication requirements. Also, the problem of increasing complexity of modern control problems while the symbolic-based assistant programming is still under development. This research presents a fully symbolic-based technique for analysis and design of control systems. This fully symbolic-based technique is employed in two of the control problems: (1) the problem of solving general state-space models, and (2) the feedback gain computation based on pole-placement method. Experiments were conducted on several case studies. The results demonstrate that the proposed symbolic solution gives identical results as the numerical corresponding solutions. So, it can be a good alternative to the numerical methods with the advantage of generality and flexibility.