  The paper deals with the control and regulation by integral controllers
forthe nonlinear systems governed by scalar quasi-linear hyperbolic partial
differentialequations. Both the control input and the measured output are
located on the boundary.The closed-loop stabilization of the linearized model
with the designed integral controlleris proved first by using the method of
spectral analysis and then by the Lyapunov directmethod. Based on the
elaborated Lyapunov function we prove local exponential stabilityof the
nonlinear closed-loop system with the same controller. The output regulationto
the set-point with zero static error by the integral controller is shown
uponthe nonlinear system. Numerical simulations by the Preissmann scheme are
carriedout to validate the robustness performance of the designed controllerto
face to unknown constant disturbances.
