In ships having two rudders, an angle error exists if there is a difference in structural and electrical parameters in two steering gear systems. Such an error also results in reduced efficiency of ship maneuverabilit...In ships having two rudders, an angle error exists if there is a difference in structural and electrical parameters in two steering gear systems. Such an error also results in reduced efficiency of ship maneuverability during navigation. For the sake of reducing the angle error, a synchro-ballistic control approach based on cloud model is proposed in this paper. First, the mechanism model of steering gear system is introduced. Second, the structure of synchro-control system of twin-rudder is proposed based on the master-slave control strategy. Third, synchro-ballistic controller based on cloud model is designed to solve the nonlinearity and uncertainty of system. Finally, the designed controller is tested via simulation under two different situations. The simulated results demonstrate that this method is simple and has stronger robustness against the variation of states and parameters of plants. Hence, the validity and reliability of the method is proved for synchro-control of two rudders, which is a significant engineering application.展开更多
为比较不同船舶对同一碰撞危险的认识,提出一种主观的船舶碰撞危险度评价模型.在最近会遇距离(Distance to Closest Point of Approach,DCPA)和最近会遇时间(Time to Closest Point of Approach,TCPA)作参数的碰撞危险度计算模型的基础...为比较不同船舶对同一碰撞危险的认识,提出一种主观的船舶碰撞危险度评价模型.在最近会遇距离(Distance to Closest Point of Approach,DCPA)和最近会遇时间(Time to Closest Point of Approach,TCPA)作参数的碰撞危险度计算模型的基础上,加入船舶安全距离圈和最晚施舵时间等主观因素,建立新的碰撞危险度计算模型.利用该模型计算并比较安全距离圈大小和最晚施舵时间不同的船舶碰撞危险度.结果表明,安全距离圈大小和最晚施舵时间不同的船舶操纵者对同一会遇态势下碰撞危险的认识是不同的。展开更多
基金supported by National Natural Science Foundation of China (No.51079033,No.60704004)the Fundamental Research Funds for the Central Universities (No.HEUCFR1009)
文摘In ships having two rudders, an angle error exists if there is a difference in structural and electrical parameters in two steering gear systems. Such an error also results in reduced efficiency of ship maneuverability during navigation. For the sake of reducing the angle error, a synchro-ballistic control approach based on cloud model is proposed in this paper. First, the mechanism model of steering gear system is introduced. Second, the structure of synchro-control system of twin-rudder is proposed based on the master-slave control strategy. Third, synchro-ballistic controller based on cloud model is designed to solve the nonlinearity and uncertainty of system. Finally, the designed controller is tested via simulation under two different situations. The simulated results demonstrate that this method is simple and has stronger robustness against the variation of states and parameters of plants. Hence, the validity and reliability of the method is proved for synchro-control of two rudders, which is a significant engineering application.
文摘为比较不同船舶对同一碰撞危险的认识,提出一种主观的船舶碰撞危险度评价模型.在最近会遇距离(Distance to Closest Point of Approach,DCPA)和最近会遇时间(Time to Closest Point of Approach,TCPA)作参数的碰撞危险度计算模型的基础上,加入船舶安全距离圈和最晚施舵时间等主观因素,建立新的碰撞危险度计算模型.利用该模型计算并比较安全距离圈大小和最晚施舵时间不同的船舶碰撞危险度.结果表明,安全距离圈大小和最晚施舵时间不同的船舶操纵者对同一会遇态势下碰撞危险的认识是不同的。
