Development of On line Test Method to Simulate Earthquake Responses by Utilizing Linear Motor Drive

利用直线电机驱动模拟地震响应的在线测试方法的开发

基本信息

批准号：
61850103
负责人：
TAKANASHI Koichi
金额：
$ 7.74万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61850103/
关键词：
On-line Test Method Earthquake Response Analysis Linear Motor 構造実験システム

项目摘要

The on-line computer test control method, widely utilized in many country as well as in Japan, has been examined, accepted, and improved by many researchers. The key techniques for the success of the earthquake response test of a structural model by this method are the accurate displacement control of the strokes of actuators and the precise measurements of displacements and loads.Hydraulic actuators with electro-servo control widely used in the on-line tests have the constitutional weaknesses, the insufficient rigidity and the pulsation in oil pressure. These deficiencies are sometimes exaggerated in tests on multi-degree of freedom systems where some actuators must be simultaneously controlled according to the commands from the computer based on the interration calcuation results of the equation of motion.To overcome these defects new types of the on-line test system have been developed. One system developed comprises a numerical-controlled electric motor, a trnsmission device with a … More ball screw which converts thw rotational power of the motor into translational movemants, and a micro-computer which controls the whole test procedure. amother system unilized a linear-motor firect drice instead of the screw-type positioning system.Many advantages of using these systems can be counted up. Among them, the advantage that the loading rod can be held at the exact positions required must be emphasized. Im the case of a culti-degree of freedom system, for example, a multi-story test frame, the displacement control of an actuator must be protected from the movements of other actuators. The hydtaulic actuators often fail in fulfilling this requirements.Several test structures were rested by using verious control system to find out the best control program. Under the most suitable program, the results show very high preciseness in the obtained response displacement. The control error could be surpressed within 20 microns for the screw-type system, and 5 microns for the direct dfive system. Less

在线计算机试验控制方法在许多国家以及日本得到广泛应用，并得到许多研究人员的检验、接受和改进，这是利用该方法进行结构模型地震响应试验成功的关键技术。在线试验中广泛使用的电伺服控制液压执行机构存在结构缺陷、刚性不足、油压脉动等问题。在多自由度系统的测试中，有时会夸大缺陷，因为必须根据运动方程的交互计算结果，根据计算机的命令同时控制一些执行器。为了克服这些缺陷，新型在线控制系统开发的一个系统包括一个数控电动机、一个带有滚珠丝杠的传动装置，该传动装置将电动机的旋转动力转换成平移运动，以及一个控制整个系统的微型计算机。另一种系统使用直线电机驱动器代替螺杆式定位系统，其中可以列举出加载杆可以保持在所需的精确位置的优点。需要强调的是，在多自由度系统的情况下，例如多层测试框架，必须保护执行器的位移控制免受其他执行器的运动影响。通过使用不同的控制系统对多种测试结构进行了测试，找出了最佳的控制方案，结果表明，在最合适的方案下，所获得的响应位移的精度可以被抑制在20微米以内。螺杆式系统，以及直接 d Five 系统 5 微米。