水气双重介质共同作用下可控水翼滑行艇纵向运动预报

Longitudinal Motion Prediction of Planning Craft with Controlla-ble Hydrofoil

为了探究水气双重介质共同作用下可控水翼滑行艇的运动响应，本文基于喷水推进滑行艇的高速运动原理，建立了水气双重介质共同作用下可控水翼滑行艇非线性纵向运动数学模型。分析了在水气双重介质共同作用下可控水翼滑行艇滑行过程中的受力特性，确定了艇体受到的重力、浮力、动升力、水翼的升阻力及力矩等。提出了可控水翼对滑行艇运动过程中的升沉量和纵倾角的控制策略。完成了0-8级线性风、周期风、随机风作用下水翼变攻角和水翼变攻角＋纵向运动对滑行艇运动升沉量和纵倾角控制结果分析。结果表明，当主机输出功率一定时，水翼变攻角可以控制滑行艇的升沉量，弱化纵倾角幅度，而水翼变攻角＋纵向运动可以同时控制滑行艇的升沉量和纵倾角。本文为水气双重介质共同作用下可控水翼对滑行艇纵向运动预报提供了有效的研究方法。

In order to probe into motion response of a high-speed planning craft with controllable hydrofoil moving in water-air dual porous media, based on the high-speed sliding theory of water-jet propelled planning crafts, a mathematical models for non-linear longitudinal motion with the controllable hydrofoil were established. Firstly, forces on sliding planning craft hull in water-air dual porous media were analyzed; also, these forces such as gravity, buoyancy, hydrodynamic lift and pressure resistance were presented. Then, the control strat- egy of heave volume and pitch angle in the motion process of planning craft was proposed. Finally, control analysis of heave volume and pitch angle was finished by the action of 0~8 classes of wind linearly increasing, periodic wind and stochastic wind at two conditions, where one is changeable hydrofoil attack angle, another is also changeable hydrofoil attack angle but with seesaw motion. The results are as follows. When the output power of host is constant, changing attack angle can control heave and recede the amplitude of pitch. Mean- while, hydrofoil changing attack angle and longitudinal motion can control both heave and pitch at the same time. The prediction method built in this paper provides an effective way to study the longitudinal motion un- der controllable hydrofoil in the water-air dual porous media.