海洋立管轴向动力响应的H_∞控制

H_∞ control for axial dynamic response of marine risers

基于FDPSO-TLD的概念设计,建立了TLD系统升沉方向的动力学模型,为减小船体升沉引起的立管轴向的动力响应,采用H∞控制方法设计电动绞车实现对升沉运动的补偿,通过构造出H∞控制器和H∞观测器对立管的轴向动应力进行主动控制。通过在频域和时域内的数值仿真表明选取适当的控制参数可有效减小立管的动应力,表明了该方法的有效性和可行性。

Based on conceptual design of FDPSO-TLD,a dynamic model of TLD system is derived.For the purpose of reducing axial dynamic response of the riser,H ∞ control method is employed to develop a winch which can compensate the heave motion of the hull.H ∞ controller and H ∞ observer are designed for active control of axial dynamic stress of the riser.The simulation results in frequency domain and time domain show that the proposed control method is effective and feasible if the parameter of H ∞ con-troller is appropriately selected.