In this paper, a self-reaction point absorber (PA) wave energy converter is studied, where wave energy is collected by the relative motion of the on-board plate and the buoy. The purpose of this study is to increase the relative displacement to obtain the maximum power. A semi-active inerter (SAI) is applied in the system, which is controlled by a force-tracking (FT) strategy. Two parts are required in the FT strategy: a target active control law; and a proper control law to adjust the inertance to track the active force (AF). The target control law is obtained by the full-state feedback of the state-space model of a two-body PA . The control law to adjust the inertance is to saturate the AF between the maximal and minimal semi-active force of an SAI. Both linear time-invariant system and linear time-varying system are studied. Power absorption is improved in both two systems by the application of SAIs. Moreover, the influence of dimensionless parameters on the ratio of power absorption improvement in the considered linear time-varying system is studied. Numerical simulation shows that the ratio of power absorption improvement is most sensitive to the changes of mass ratio of the on-board plate and the buoy.

在本文中，研究了一种自反应点吸收器（PA）的波能转换器，该波能通过船上板和浮标的相对运动来收集波能。这项研究的目的是增加相对位移以获得最大功率。系统中采用了半主动惰轮（SAI），该系统由力跟踪（FT）策略控制。金融时报策略需要两部分：目标主动控制法；并通过适当的控制定律来调整惯性以跟踪主动力（AF）。目标控制律是通过两体PA的状态空间模型的全状态反馈获得的。调整惯性的控制律是使AF饱和在SAI的最大和最小半主动力之间。研究了线性时不变系统和线性时变系统。通过使用SAI在两个系统中都改善了功率吸收。此外，研究了无量纲参数对所考虑的线性时变系统中功率吸收比提高的影响。数值模拟表明，功率吸收率的提高对机载板和浮标质量比的变化最为敏感。