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In order to ensure the accuracy of course control and achieve good performance on roll stabilization, this paper designs rudder/fm joint SMC system, thereby improving ship's course stability, security and comfort of crew and passenger. Aiming at ship motion with the features of nonlinearity, strong coupling, multivariable and complex sea condition, this paper establishes the ship motion mathematical...
Considering the nonlinearity, parameters perturbation and random waves disturbance to the ship fin stabilizer system during ship sailing on the rough sea, a robust controller based on sliding mode control which incorporates fuzzy tuning technique is proposed in this paper. The sliding mode control is used to force the ship roll to zero. The fuzzy tuning is adopted to eliminate the chattering of control...
Dynamic positioning system of marine vehicles has been undergoing a rapid development and application. In this paper a maneuvering mathematical model and a pure sway motion model with three degrees of freedom are established, an ADRC controller for the dynamic positioning system of a rescue ship is designed. The results of simulation indicate that the control performance and robustness of ADRC is...
We put forward a system structure of controlling the tightening operation of bolts using multiraxial tightening machine. A kind of fieldbus intelligent tightening control system is designed with the technology developing of fieldbus intelligent instrumentation. This system is a distributed structure based on fieldbus control system which consists of CAN bus, Profibus-DP bus, and adopts many advanced...
This paper attempt to achieve a more accuracy simulation of high speed cylindrical bearing cage's dynamic performance. Considering the flexibility of cage, dynamic equations of cylindrical roller bearing in high speed in main-shaft of aero-engine was established using modified Craig-Bampton substructure mode synthesis method. Rigid-flexible dynamic simulation software of cylindrical roller bearing...
Computed on the ABAQUS finite element software, took the large group piles foundation of the Changjiang river road bridge as the research project, based on the Morison equation, using the added water mass method to consider the effects of hydrodynamic pressure, selecting three earthquake wave with different spectrum, considering dynamic nonlinear characteristics of soils and concrete, building the...
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