Abstract

ABSTRACTThe objective of this paper is to study detectability, observability and related Lyapunov-type theorems of linear discrete-time time-varying stochastic systems with multiplicative noise. Some new concepts such as uniform detectability, -exact detectability (resp. -exact detectability, -exact detectability, -exact detectability) and -exact observability (resp. -exact detectability, -exact detectability, -exact detectability) are introduced, respectively, and nice properties associated with uniform detectability, exact detectability and exact observability are also obtained. Moreover, some Lyapunov-type theorems associated with generalised Lyapunov equations and exponential stability in mean square sense are presented under uniform detectability, -exact observability and -exact detectability, respectively.

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