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This paper mainly studies the angle tracking problem in electronic throttle system with unknown time-varying disturbances. Firstly, generalized proportional integral observer (GPIO) is used to estimate the time-varying disturbances including model uncertainties, friction torque and spring initial torque. Secondly, a composite controller combining disturbance estimation and backstepping control method...
Considering load uncertainties in the DC-DC buck converter, the mismatched disturbances are imposed on the system, which would cause degradation of the control performance. Conventional backstepping control (BSC) scheme fails to achieve a high precision performance especially in the presence of strong disturbances. In addition, the disturbances caused by load uncertainties are complex in reality,...
In this paper, we discuss stabilization problem for a class of second-order nonlinear systems with output constraints. At first, as a constraint-handling tool, we design a new barrier Lyapunov function, which has patch-like characteristic and can save control power effectively. Then, the stabilization problem for the system is discussed by applying adding a power integrator and our new barrier Lyapunov...
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