潜艇垂直面舵桨联合操控仿真

为改善潜艇低速运动时的操控性能,潜艇上配置了辅助垂直推进器。分析低速运动时潜艇在发射潜射导弹过程中受到的发射反力,利用Simulink软件建立潜艇水下运动模型,进行潜艇低速运动时的操纵控制仿真研究。仿真结果与公开文献中发表的数据吻合,验证了方法的有效性。在此基础上加入辅助垂直推进器,潜艇垂直面舵桨联合操控仿真研究表明,表面潜艇垂直面的机动能力得到了较大改善。     

超大型集装箱船安全靠泊洋山深水港

介绍洋山深水港的基本情况和超大型集装箱船安全靠泊洋山深水港的操纵方法和注意事项。     

两起丢锚事故探析

通过对两起抛起锚操作事故实例的原因分析,探讨正确的锚作业方法与应急措施,对船长、船舶驾驶人员有指导意义。     

Lap time optimisation of a racing go-kart

The minimum lap time optimal control problem has been solved for a go-kart model. The symbolic algebra software Maple has been used to derive equations of motion and an indirect method has been adopted to solve the optimal control problem. Simulation has been successfully performed on a full track lap with a multibody model endowed with seven degrees of freedom. Geometrical and mechanical characteristics of a real kart have been measured by a lab test to feed the mathematical model. Telemetry recorded in an entire lap by a professional driver has been compared to simulation results in order to validate the model. After the reliability of the optimal control model was proved, the simulation has been used to study the peculiar dynamics of go-karts and focus to tyre slippage dynamics, which is highly affected by the lack of differential.     

Brain limbic system-based intelligent controller application to lane change manoeuvre

This paper presents the application of a novel neuromorphic control strategy for lane change manoeuvres in the highway environment. The lateral dynamics of a vehicle with and without wind disturbance are derived and utilised to implement a control strategy based on the brain limbic system. To show the robustness of the proposed controller, several disturbance conditions including wind, uncertainty in the cornering stiffness, and changes in the vehicle mass are investigated. To demonstrate the performance of the suggested strategy, simulation results of the proposed method are compared with the human driver model-based control scheme, which has been discussed in the literature. The simulation results demonstrate the superiority of the proposed controller in energy efficiency, driving comfort, and robustness.     

浅水域对瘦长型舰船操纵性的影响

研究浅水对瘦长型舰船操纵的影响是舰船航行操纵的一项重要课题。根据势流理论,以某型船舶为仿真实体,基于不同船体网格模型。采用MSC—Patran对船体进行网格划分,进行了浅水域的操纵性计算与仿真.所得结果能够较好反映瘦长型船舶在浅水域的操纵特性,     

潜艇低速运动时操纵控制仿真

潜艇垂直发射潜射导弹,将受到很大的发射反力,同时潜艇航速较低,引起舵效较差,从而使潜艇的操纵控制比较困难。本文分析低速运动时潜艇在发射潜射导弹过程中受到的冲击载荷及其运动响应,利用Simulink软件建立潜艇水下运动仿真模型。在此基础上进行潜艇低速运动时的操纵控制仿真研究,仿真结果与参考文献中发表的数据较为吻合,验证了该方法的有效性。     

The effect of engine spin direction on the dynamics of powered two wheelers

The effect of engine spin direction on the dynamics of powered two wheelers is investigated in terms of steady-state points (equilibria), vibration modes (stability), manoeuvre time (performance/manoeuvrability) and handling. The goal is to assess and quantify the advantage sometimes claimed for the ‘counter-rotating’ engine configuration, where the engine spins in the opposite direction with respect to wheels, against the ‘conventional’ configuration, where the engine spins in the same direction of wheels.     

潜艇逆速时的垂直面机动仿真分析

逆速是潜艇水下航行时的一种特殊状态下的速度,其垂直面操纵问题也是当前潜艇面临的一个难题。根据一种利用首舵操纵控制消除尾舵逆速影响的计算方法,得到了尾舵逆速时首尾升降舵同时操纵进行垂直面机动的方法,并通过潜艇水下垂直面操纵运动模型,对这种操纵形式进行了仿真验证,验证结果表明这种方法可使潜艇在尾舵逆速时更快更有效的进行垂直面机动。     

浅水域中船舶的操纵运动仿真研究

研究船舶在浅水中的操纵与控制是船舶航行安全的一项重要课题。根据势流理论,以某型船舶为仿真实体,进行仿真建模,通过对船体进行网格划分,基于不同船体网格模型进行浅水域的操纵性计算。研究结果反映出该型船舶在浅水域的操纵特性,为该型船舶在浅水域的操纵提供科学依据,同时对其它船型的操纵性研究具有一定的借鉴意义。