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With the development of modern technology, the practical systems become much more complex, smart actuators and sensors, such as piezoceramic and magnetostrictive material based ones, have widely been used in reality due to its variety of advantages. Therefore, nonlinearities, including not only the dynamical nonlinearity but also the non-smooth nonlinearities both in actuators and sensors, should...
Pulse-width modulations (PWMs) are widely investigated in active power filter (APF) applications. However, there are seldom PWMs proposed in hybrid APF (HAPF) applications because of their non-linear current characteristic. This study proposes a non-linear adaptive hysteresis band PWM controller for HAPFs to reduce the switching loss and keep the total harmonic distortion (THD) at an acceptable level...
This paper presents an adaptive hysteresis band controller for LC-coupling hybrid active power filter (HAPF) which can provide an approximate constant switching frequency. As the LC-coupling impendence can yield nonlinear compensating current slope, the conventional adaptive hysteresis band controller for linear L-coupling system like active power filter (APF) cannot be directly applied to nonlinear...
In this paper, robust nonlinear control for nonlinear uncertain systems preceded by hysteresis is considered by using operator based robust right coprime factorization approach. Since not all hysteresis model is suitable in operator-theoretic based settings, one generalized Prandtl-Ishlinskii hysteresis model and its inverse model are introduced. The properties of the models are summarized, which...
This paper presents a customized wireless power management microsystem for endoscopic capsule robot. The microsystem is composed of a rectifier, a regulator, a battery charger and a low dropout (LDO) regulator. The electromagnetic energy signal received from a self-resonant coil is rectified and then regulated to generate a stable DC voltage for charging the Li-ion battery. Stable DC voltage is provided...
As wireless devices continue to become more prevalent, heterogeneous wireless networks - in which communicating devices have at their disposal multiple types of radios - will become the norm. Communication between nodes in these networks ought to be as simple as possible; they should be able to seamlessly switch between different radios and network stacks on the fly in order to better serve the user...
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