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Wireless body area networks (WBANs) have attained increasing popularity as the next generation framework of wearable technologies for human monitoring. Invasive or noninvasive wearable sensors designed in a WBAN are worn to gather vital information. Biofeedback is a recent concept where collected data are used to generate actuation signals in WBANs. Applications can be seen in various areas such as...
Wearable posture measurement units are capable of enabling real-time performance evaluation and providing feedback to end users. This paper presents a wearable feedback prototype designed for freestyle swimming with focus on trunk rotation measurement. The system consists of a nine-degree-of-freedom inertial sensor, which is built in a central data collection and processing unit, and two vibration...
This paper describes the design of a PID-type Fuzzy Logic Controller (PID-FLC) and its application on the stabilization of an Active Magnetic Bearing System (AMB). The proposed PID-FLC is obtained by combining a PD-type Fuzzy Logic Controller (PD-FLC) and a Pi-type Fuzzy Logic Controller (PI-FLC). A multi-objective Genetic Algorithm (MOGA) is used to determine the scaling factors of the inputs and...
A high performance H∞ controller designed to control an Active Magnetic Bearing (AMB) system is considered in this paper. A digital signal processor (DSP) is used to implement the designed controller in real-time. The designed H∞ controller is compared with a conventional lead-lag type compensator and the on-board analogue controller of the AMB under various conditions and disturbances acting on the...
This paper investigates performance of various controllers on the stabilization of active magnetic bearing system (AMBs). Firstly, since AMBs are inherently open-loop unstable, closed-loop system identification is adopted in order to obtain the model of the system under study. Next, based on the obtained model, Linear Quadratic Gaussian (LQG), PD-like Fuzzy Controller (PD-FLC), PID-like Fuzzy Controller...
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