| 1. | The self - tuning fuzzy control algorithm including a back - propagation - based fuzzy controller and the gradient descent method is applied to reduce the pitch motion of the swath ship with control stabilizing fins
控制模式为一自调模糊控制，包括应用一类神经倒传递观念的模糊控制器及梯度下降法来减少纵摇运动。 |
| 2. | The theoretical calculation and the model experimental result both have confirmed that the built - up stabilizing appendage is able to reduce pitching n heaving motions and especially bow acceleration considerably
理论计算和模型试验结果均证明了组合减摇附体能够减小船的纵摇运动、升沉运动，尤其是大幅度降低首部加速度。 |
| 3. | In the end the predicting model is used in watercraft motion modeling and predicting , and the auhor analyzes the result of simulating . the result indicates that this ap $ j $ ifgx9 @ 1 % & itx means is reasonable and feasible and gains the satsfactory pmpose
最后将此模型应用于舰船纵摇运动的极短期预报，并从统计理论的角度对仿真结果进行了分析，分析结果表明该方法是合理可行的，确实提高了预报精度，加长了预报时间。 |
| 4. | On the basis of cybernetics through forecast roll and pitch of a ship and by adjusting the object ' s space position and keep its horizontal state without limit of actual sea state according to the control rules with the predictive value of ship ' s roll angle and pitch angle
应用控制理论通过预测随机海浪扰动下船舶的横摇、纵摇运动的摇角值，按照所设计的控制规律实现在不受实际海况限制的情况下调整船上物体的空间位置，使此物体保持水平状态的目的。 |
| 5. | This paper applies ittc single - parameter ocean wave spectrum to simulate a random long - crested ocean wave according to statistics superposition theory and real - time simulate disturbance on the ship by random wave . it simulates roll and pitch of the ship in random wave in the time domain and gains roll angle ( t ) and pitch angle ( t ) signal of ship rolling movement
本文根据统计叠加理论，采用ittc单参数标准海浪谱仿真模拟实际的长峰波随机海浪，进而实时仿真长峰波随机海浪对船舶的随机扰动，对船舶在海浪中的横摇和纵摇运动进行了时域仿真，得到船舶摇荡运动的横摇角信号( t )和纵摇角信号( t ) 。 |
| 6. | The results are of more precision by adopting the latest achievements . conclusions are drawn by a large number calculation . 1 . to large extent , the magnitudes of sway and yaw are affected by the depth of water , so is that of anchor chain tension ; the magnitudes of sway and yaw are smaller in the shallows than in the deep , so is that of anchor chain tension ; 2 . to small extent , the magnitude of heave and pitch is affected by the depth of water
该数学模型突破了以往数学模型的局限性，不仅考虑了纵荡、横荡、首摇运动，还考虑了垂荡、纵摇运动；在该数学模型中还考虑了浅水的影响，对模型中受浅水影响较大的部分作了浅水修正；在计算各外力时，采用最新研究成果，使计算结果更加准确；通过大量计算得出一些很有意义的结论： 1 |
| 7. | For the dynamic process of ship rolling movement , this paper analyses its dynamic date with time series analysis method and brings up this system ' s the most excellent autoregressive model ( ar model ) according to least aic criterion ( akaile , information criterion ) . it reveals the regular pattern of ship rolling movement and forecasts the future value of roll angle and pitch angle , then transforms it to adjusting value of object and adjusting it according to appropriate control rules
对于船舶摇荡运动这一动态过程，采用时间序列分析的方法，建立系统的自回归模型( ar模型) ，并根据最小aic信息量判定准则保证建立的系统模型为最优化模型。利用参数模型的方式对船舶横摇、纵摇运动的动态数据进行分析处理，揭示船舶摇荡运动的规律，预测船舶横摇角、纵摇角的未来值。 |
