海上滑行时两栖车辆的水动力特性数值计算

Numerical calculation of hydrodynamic characteristics of amphibious vehicle during offshore taxiing

为了提高海上滑行时两栖车辆的动力控制能力,进行海上滑行时两栖车辆的水动力特性数值计算分析,结合力学控制方法进行两栖车辆的水动力建模和控制优化。提出基于运动力学和阻尼力反馈调节的海上滑行时两栖车辆水动力解算模型,构建两栖车辆在海上滑行时的运动学模型和动力学模型,根据滑行时的阻尼力和水动力进行平衡性控制,在考虑小扰动和稳态误差干扰下,根据两栖车辆的受力情况进行阻尼反馈调节,提高两栖车辆的滑行控制能力,并实现两栖车辆的水动力特性数值优化解算。仿真结果表明,通过对两栖车辆的水动力特性数值计算,提高两栖车辆的海上滑行稳定控制性能,输出动态平稳性较好。

In order to improve the power control ability of amphibious vehicles when taxiing on the sea,numerical calculation and analysis of hydrodynamic characteristics of amphibious vehicles while taxiing on the sea are carried out.The hydrodynamic modeling and control optimization of amphibious vehicles are carried out by means of mechanical control method.A hydrodynamic calculation model of amphibious vehicles is proposed based on motion mechanics and damping force feedback regulation.The kinematics model and dynamic model of amphibious vehicle taxiing on the sea are constructed.According to the damping force and hydrodynamic force,the equilibrium control is carried out under the consideration of small disturbance and steady error disturbance.According to the force condition of amphibious vehicle,damping feedback adjustment is carried out to improve the glide control ability of amphibious vehicle,and the numerical optimization solution of hydrodynamic characteristics of amphibious vehicle is realized.The simulation results show that,through numerical calculation of hydrodynamic characteristics of amphibious vehicles,the stability control performance of amphibious vehicles on the sea is improved,and the output dynamic stability is better.