状态空间模型在振荡浮子式液压系统波能吸收装置中应用

Application of the state-space model to oscillating buoy hydraulic system′s absorbing device

状态空间模型是研究海洋波浪能转换系统相互作用的一种有效的数学模型,应用该模型的关键之一是如何根据试验或计算的脉冲响应函数来高效地确定状态空间模型中的矩阵参数。结合最速降线法、最小二乘法和精密积分法来求矩阵参数,分别采用了两种不同的方法模拟出了单浮体在波能吸收装置作用下的位移、速度和加速度,并计算出在非线性阻尼情况下的波能装置吸收功率,得出了装置的最优化设计参数。

The state-space model is one of the effective mathematical models to study the interaction between ocean waves and the wave energy conversion system.One of the key aspects of the application of the model is how to efficiently obtain the matrix parameters of the model according to the experimental data or the computed values of the impulse response function.In combination with the brachistochronic method,the least square method and the precise integration method,the matrix parameter is computed.Two methods are adopted in this paper to simulate the displacement,the velocity,and the acceleration of cylinder derived in the presence of the wave energy absorbing device,and to compute the absorbing power of the wave energy device in the nonlinear damping condition so as to achieve the optimal design parameter.