In accordance with the principle of instantaneous optimal active control, an 'Off-On Energy Dissipation' Semi-active control is proposed, which is based upon optimal active control displacement. 根据瞬时最优主动控制的原则,提出了MR阻尼器对桅杆结构风振反应智能半主动控制基于阻尼器位移的开关-耗能半主动控制策略。