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The theory of sliding mode control system(SMC) has been
devolped in recent years.The advantages of it lie in the
rejection to the external disturbances and low sensitivity to
the system parameter variation. This thesis contains two parts.
In part I,we present a SMC design approach for nonlinear time-
varying SISO and MIMO systems.It is shown that the output
tracking error can be guaratied to converged to zero with an
exponential rate. The designof SMC involves two step:The first
is the construction of the switching surface.The second step is
the design of a switching control law.The control law included
two parts: one is the nominal part determinined by only the
nominal values of the system parameters; the other is the
switching part which contains time varying controller gains. In
part II, this thesis presents a systematic and effective method
using sliding mode control for large scale systems in present of
interconnected terms,system parameter variatins and bounded
disturbance.
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