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为了用高速电液伺服机构获得精密定位和快速响应,除了位置主反馈控制外,还要进行速度信号和加速度信号反馈补偿。对于补偿用的速度信号,有些间接方法,如把位移微分或把加速度积分,但必须补偿噪声和飘移的影响。用动圈式之类速度传感器直接检测速度时,分别需要位移与速度传感器,缺点是装置变得大而复杂。因此,在本研究中,作者研制了能用差动变压器同时检测位移和速度的检测器。有了这种检测器,就能制出装有该检测器的结构紧凑的伺服缸,并可使电液伺服系统小型化。本报告首先解释位移-速度检测器的工作原理,然后讨论该检测器静态与动态特性的实验研究结果。进而介绍采用装有该检测器的液压伺服缸的多自由度振动系统。
In order to obtain precise positioning and rapid response with high-speed electro-hydraulic servo, besides position main feedback control, speed signal and acceleration signal feedback compensation should be carried out. There are indirect methods for compensating velocity signals, such as differentiating displacements or integrating accelerations, but you must compensate for the effects of noise and drift. With dynamic speed sensors such as the speed of the direct detection of speed, respectively, displacement and speed sensors are required, the disadvantage is that the device becomes large and complex. Therefore, in this study, the author developed a detector that can detect both displacement and velocity using a differential transformer. With this detector, a compact servo cylinder equipped with the detector can be made and the electro-hydraulic servo system can be miniaturized. This report first explains the working principle of the displacement-velocity detector and then discusses the experimental results of the static and dynamic characteristics of the detector. Furthermore, a multi-degree-of-freedom vibration system using a hydraulic servo cylinder equipped with the detector is introduced.