Optimal disturbances rejection control for singularly perturbed systems with time-delay

The optimal control design for singularly perturbed time-delay systems affected by external distur-bances is considered.Based on the decomposition theory of singular perturbation,the system is decom-posed into a fast subsystem without time-delay and a slow time-delay subsystem with disturbances.Theoptimal disturbances rejection control law of the slow subsystem is obtained by using the successive ap-proximation approach(SAA)and feedforward compensation method.Further,the feedforward and feed-back composite control(FFCC)law for the original problem is developed.The FFCC law consists of lin-ear analytic terms and a time-delay compensation term which is the limit of the solution sequence of theadjoint vector equations.A disturbance observer is introduced to make the FFCC law physically realiz-able.Numerical examples show that the proposed algorithm is effective.

前馈控制在根管治疗术护理安全管理的应用

目的:前馈控制在根管治疗术中护理安全管理中的应用效果。方法:2016年3月至2017年2月,实行前馈护理干预措施,具体包括成立口腔前馈控制护理管理小组、应用橡皮障隔湿术,护士定期进行层级培训考核、不良事件应急处理及上报流程的制订、开展患者的安全教育,实行品管圈。结果:口腔护理安全中不良事件发生率由2015年3月至2016年2月的12.02%下降到4.41%;差异具有统计学意义(P<0.05)。结论:前馈控制在根管治疗术护理安全管理中应用,能够有效降低不良事件发生率,提高了护理质量,同时保障患者的安全。