Active control of multi-degree system by means of small linear actuators

我们开发了一种有效的主动控制方法。它的执行机构是直线感应电机。本研究开发的程序可以显式地处理执行器的极限：功率极限和时间延迟。因此，即使在极大的地震振动幅值下，新方法也能正常工作。我们仔细检查了物理模型的各个部分：传感或测量单元、数据处理单元和驱动单元的性能和可靠性。在对系统进行测试的过程中，发现执行器的高精度控制技术迅速适用于基于人工震源的地面主动遥感。作为本研究目的的延伸，我们研究了扭转振动。并对其可行性进行了研究。

We have developed an efficient active control method. Its actuators are linear induction motors. The program developed in the present research can treat the limit of the actuators explicitly : the limit of the power and the time delay. Consequently, the new method works normally even under the extremely large amplitude of seismic vibration. We examined very carefully the performances and the reliability of each of the individual part of the physical model : the sensing or measuring unit, the data processing unit and the driving unit.In the process of the examination of the system, it was found that the high precision control technology of the actuators was promptly applicable to the active remote sensing of the ground based upon the artificial seismic sources. As an extension of the objectives of the present reseach, we investigated torsional vibration. Its feasibility was also examined.