Output feedback regulation of a chain of integrators with unknown time-varying delays in states and input

Predictor‐based adaptive feedback control for a class of systems with time delay and its application to an aircraft skin inspection robot

“…There is an another efficient method based on frequency domain for solving time-delay problems. In [33], an adaptive output feedback controller is introduced for a chain of integrators that have unknown timevarying delays in both states and input. The gain of feedback controller is also a dynamic gain for different control objectives.…”

Output feedback regulation of upper triangular nonlinear systems with uncertain time‐varying delays in states and input

“…In this paper, we solve an output feedback control problem of more generalized upper triangular nonlinear systems with uncertain time‐varying delays in both states and input. Our output feedback control problem treated in this paper is a generalized version of those in . The key features are as follows: Delays in the input and the states are uncertain and time varying. Delays in nonlinearities are with integral forms. Nonlinearities are extended by including more power of u as well as unknown parameters. …”

“…In this paper, we solve an output feedback control problem of more generalized upper triangular nonlinear systems with uncertain time-varying delays in both states and input. Our output feedback control problem treated in this paper is a generalized version of those in [6,10,13,19]. The key features are as follows:…”

“…In practice, time‐delays exist and can be obstacles for system regulation or stabilization, and many related studies have been performed before . Time‐delay problems are significant because time‐delays often cause the system instability.…”

“…In , the delay rate is extended more than unity for discrete time. In , output feedback regulation is accomplished without information on delays for a chain of integrators containing time‐varying delays in states and input in which delays can be arbitrarily large and fast varying. In , the state controller is investigated for the systems with delays in states and input and, in particular, delays with integral forms.…”