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Fin stabilizers are often used at high speed of ship, however they also can produce effective lift through pitching actively at low speed. The lift model of fin stabilizer at low forward speed is proposed based on the fluid changing on fin stabilizer's surface. Then the lift model is applied to the ship roll stabilization system. From simulation data, it can be seen that the roll of ship is reduced...
A new FEM is given in which the planar continuum is replaced by the planar frame. Firstly the planar continuum is subdivided into the planar rectangular element with 5 nodes and 15 degrees of freedom, and then the rectangular element is transformed into the cross-frame element, thus replacing the planar continuum by the planar frame. Nodal force in the cross-frame element under loading is calculated...
There is a growing interest around the world in supplying the communication networks with green energy from natural resources, e.g., solar, wind, and hydro, to reduce carbon footprints. However, the green energy sources and the energy buffer have the limitation of unstable availability and capacity. It is challenging to ensure that the fluctuant energy supply meets the demands of dynamic traffic loads...
Flatness and gauge are the most important factors in strip quality. Automatic gauge control (AGC) and automatic flatness control (AFC) are a coupled multivariable system, which holds down the quality of strip heavily. In this paper the dynamic mathematics model is established considering AGC and AFC as a whole system, designing intelligent-decoupling method based on CMAC model. The simulation shows...
Under the assumption that time to failure and time to repair of unit are exponentially distributed, this paper presents a general procedure for conducting an inherent availability test with fixed sample size of two-unit same redundant system. Above all, two design principles for general availability test procedure of redundant system are presented. One is that ensuring stated levels of producer's...
The influence factors of pH and contact time were used to evaluated the biosorption ability of the heavy metal cadmium (CdII) onto the lyophilized Zygosaccharomyces rouxii CICC1379 biomass from aqueous solutions. And the biosorption equilibrium models of biosorption and biosorption kinetics modeling were also studied. The initial pH of the aqueous solution with Cd(II) had strongly influences on the...
A rapid generalized predictive control algorithm based on Toeplitz equation which is used to separate the future and past information in the predictive equation is presented in this paper. And the performance of the closed-loop system is improved further for the introduction of a weighted average strategy in the control law. Simulations and experiments verify the feasibility and rapidity of the proposed...
In order to mitigate the inter-carrier interference (ICI)which severely degrades the performance of Orthogonal Frequency Division Multiplexing (OFDM) system, an improved zero-forcing equalization method based on precoding is proposed. By choosing the appropriate precoders, the system can achieve maximum multipath diversity gain and Doppler diversity gain. A block precoding method has also been applied...
Generalized predictive control algorithm based on Toeplitz equation is presented in this paper. The Toeplitz matrix is used to separate the future and past variables in the predictive equation. And then, an weighted average strategy is introduced in the control law to improve performance of the closed-loop system. The effectiveness and rapidity of this algorithm is demonstrated by the simulation results.
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