This work is concerned with the following nonautonomous evolutionary system on a Banach space $X$,
${x_t} + Ax = f\left( {x, h\left( t \right)} \right), \;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\left( {0.1} \right)$
where $A$ is a hyperbolic sectorial operator on $X$, the nonlinearity $f \in C({X^\alpha } \times X,X)$ is Lipschitz in the first variable, the nonautonomous forcing $h \in C(\mathbb{R},X)$ is $\mu $-subexponentially growing for some $\mu >0$ (see (3.4) below for definition). Under some reasonable assumptions, we first establish an existence result for a unique nonautonomous hyperbolic equilibrium for the system in the framework of cocycle semiflows. We then demonstrate that the system exhibits a global synchronising behavior with the nonautonomous forcing $h$ as time varies. Finally, we apply the abstract results to stochastic partial differential equations with additive white noise and obtain stochastic hyperbolic equilibria for the corresponding systems.
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