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首页> 外文期刊>Iranian Journal of Science and Technology, Transactions of Mechanical Engineering >Open Loop Active Control Technique on Segmented Marine Riser Vibration Using Electromechanical Actuator
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Open Loop Active Control Technique on Segmented Marine Riser Vibration Using Electromechanical Actuator

机译：机电作动器对分段立管振动的开环主动控制技术。

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摘要

Recently, works have been focusing on suppression of the segmented cylindrical marine riser vibration caused by vortex-induced vibration experimentally as an open loop active vibration control (OLAVC) model. The main objective of this research is employing the OLAVC theory using double control rods driven by double motors as an electromechanical actuator at two locations which are: control rods located beside (CRBR) and in front-back (CRFBR) to the riser. Passive control technique has been verified before employing the power to the motor for both locations. The electromechanical actuators consisted of double control rods driven by double motors (12 V DC) and connected by couplings. The results revealed that the passive control technique was inadequate to suppress the cylinder vibration in both locations. Therefore, OLAVC techniques were developed with four voltages: 6, 8, 10, and 12 V which are, respectively, equivalent to 50, 75, 83, and 100% of the motor power to rotate the control rods. Eventually, a motor counter-clockwise (CCW) direction of rotation provided a better suppression compared with the clockwise direction. Moreover, an OLAVC system seemed to be adequate to reduce the vibration at all the supplied voltages at CCW direction and the maximum suppression has been obtained at 12 V for all actuator positions and water flow speeds where the maximum vibration suppressed up to 65.13 and 69.81% at the CRFBRP and CRBRP positions, respectively, with superior performance of CRBR position.
机译：近年来，作为开环主动振动控制（OLAVC）模型，研究工作一直集中在抑制由涡流引起的振动引起的分段圆柱形海洋立管振动上。这项研究的主要目的是利用OLAVC理论，将双电动机驱动的双控制杆作为机电执行器在两个位置使用：控制杆位于立管的旁边（CRBR）和前后（CRFBR）。在两个位置都使用电动机电源之前，已经验证了无源控制技术。机电执行器由双控制杆组成，双控制杆由双电机（12 V DC）驱动并通过联轴器连接。结果表明，被动控制技术不足以抑制两个位置的气缸振动。因此，开发了具有四个电压的OLAVC技术：6、8、10和12 V，分别等于旋转控制杆的电动机功率的50％，75％，83％和100％。最终，与逆时针方向相比，电动机逆时针（CCW）旋转方向提供了更好的抑制效果。此外，OLAVC系统似乎足以降低CCW方向上所有供电电压下的振动，并且对于所有执行器位置和水流速度，在12 V时都获得了最大抑制，其中最大振动被抑制到65.13和69.81％ CRBRRP和CRBRP位置分别具有CRBR位置优越的性能。

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