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An output feedback regulation problem is considered for a class of high-order feedforward nonlinear systems with delay in the input under measurement sensitivity. The key features are that the considered systems have uncertain high-order feedforward nonlinearity and unknown time-varying delay in the input. Then, the controller is supposed to be engaged where the output feedback information is distorted by measurement sensitivity. Our proposed controller has two gains-fixed and adaptive gains. The fixed gain is first designed to compensate for measurement sensitivity, and the adaptive gain is next utilized to dominate both unknown input delay and uncertain high-order feedforward nonlinearity. Simulation examples are given to highlight the advantage of our control scheme.

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