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Leveling operation is a very important step in the installation process of offshore jacket platform and it is performed by leveling tool. In this paper, the hydraulic lifting subsystem model of leveling tool is established, and a modified Smith predictor is used to address the time delay problem caused by long pipeline. A composite control strategy combining identical and master slave control mode...
It is difficult to obtain a more precise mathematical model of parallel-inverter system with a nonlinear load. Nonlinear load is the general factor which affects output voltage total harmonic distortion (THD) and current sharing. But fuzzy controller can control well without a precise mathematical model. Master-slave control is used to control the parallel-inverter system in this paper. The voltage...
In this paper we introduce an adaptive structure that dynamically calculates the gains of a PI controller, in presence of parametric disturbances in the controlled process approach, with the purpose of maintaining a desired pole assignment in closed loop, besides fulfilling a specified time closed loop performance. The designing procedure presented in this work is useful when the process to be controlled...
The mathematical model of linear induction motor (LIM) based on slip frequency type vector control system is established. A self-adjusting fuzzy controller (SAFC) is designed as magnetic thrust adjuster of the motor. The speed of the motor is adjusted by control magnetic thrust of the motor. The scheme of the slip frequency type vector control system of the LIM is obtained by observing the magnetic...
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