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Rudder roll stabilization (RRS) for ship steering is to only use the rudder as the actuator for maintaining the autopilot heading and reducing the roll angle. In this study, a nonlinear control scheme for RRS was proposed based on Fuzzy Gain Scheduling (FGS)-PID. The proposed method was applied to a nonlinear multirole naval vessel model. The proposed method is compared with traditional PID and LQR...
Stabilization problems for nonlinear systems are difficult, especially when not all the state are available. This study proposed a combination of constrained H∞ and loop transfer recovery (LTR) to control nonlinear systems via Takagi-Sugeno fuzzy model. First, the Takagi-Sugeno fuzzy model is employed to represent a nonlinear system. Next, based on the fuzzy model, a Kalman filter is developed. The...
Recently, APPs (applications for intelligent mobile devices) about car recorder systems have been proposed for various mobile OS. Due to the numbers of APPs in the iOS is more than that of others OS, our car video recorder system is built on iOS. In addition, the objective-c programming language is employed to code APPs in the Xcode. Usually, the iOS mobile devices (e.g. iPhone) are equipped with...
In this paper, based on least trimmed squares-support vector regression (LTS-SVR), a robust radial basis function network (RRBFN) is proposed in the modeling problem to deal with training data sets that may contain outliers and noises. There are two stages in the proposed RRBFN approach. In stage I, outliers and large noises will be trimmed via the LTS-SVR procedure so that the influences of outliers...
Rough sets approach of attributes reduction can be used as a purely structural method for reducing dimensionality using information contained within the dataset and preserving the meaning of the features. In this paper, the weighted interval-value fuzzy-rough attribute reduction algorithm is proposed for interval-value data. It will introduce IT2 into hybrid fuzzy-rough QuickReduct algorithm to deal...
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