Study On Intelligent Controller Of Fin Stabilizer Base On ARM

As an important system of marine engineering,ship fin stabilizer have been widely used in many different kinds of ships.Fin stabilizer have played an important role for improving ship behavior in waves,increasing operational life-span of ship,ameliorating work conditions of equipment and crew and advancing battle effectiveness of naval ship.Reducing ship roll motion is one of the important tasks of ship motion control.In this paper,in order to ship fin stabilizer system for the study,focus on the functional design and implementation scheme of fin stabilizer controller based on ARM processor.Generally,PID controller based anti-moment principle has been commonly adopted in ship fin stabilizer system.The performance of the controller depends mainly on natural period of ship roll motion and non-dimensional roll damping coefficient.Because of complexity,non-linearity,time-varying of ship roll motion and uncertainty of sea condition,satisfied control effect is very difficult to be obtained with conventional PID controller.The effective measure to solve the problem is that advanced control strategies should be introduced.The paper combines fuzzy control with PID control,achieve PID parameters Auto- tuning which only use the long-term practical accumulation of experience knowledge of operator and expert,then use the fuzzy reasoning identifying the characteristic parameter of object on-line,changing control rule in time,needn't the accurate model of object.In addition,wave scale controller is an important component of fin stabilizer controller,this paper has conducted a study of its design,propose a design method of wave scale controller of fin stabilizer based on spectral estimation of wave,to make up for the shortcoming of the traditional wave scale controller can not take full advantage of the information on the waves.Most of fin stabilizer controllers utilize Single Chip Machine as their main processor or are developed based on Industry Control Machine at present.The former has low integration degree and poor stability while the latter has high cost. This paper devises a new type of controller for fin stabilizer based on ARM processor.The problems mentioned above have been solved.The proposed system consists of hardware platform and software platform.The hardware platform includes controller's core circuit based on the LPC2214 of PHILIPS CO,and driving circuit for assist implementation of control.The software platform is mainly software based on ARM,which includes boot code and application program.The research results indicate that the new system take on some advantages, such as high integration density and performance-price ratio,superior performance,strong anti-jamming capability,good stability,high real-time performance and so on.In addition,the controller cans adapt to the developing trend of fin stabilizers control system's intelligence.Therefore,the fin stabilizers controller has better use-value and significance.