Real-time digital image point tracking feedback was used to control a servo-hydraulic load train during the loading of a Glass Fiber Reinforced Plastic (GFRP) cantilever beam. The loading pattern was defined in terms of two translational and one rotational in-plane degrees-of-freedom at a single control point on the beam. Tests were performed with both single-and multi degree-of-freedom controls, using independent and simultaneous control of the actuators, respectively. A reference control system was set up to transfer the displacements of three hydraulic actuators into a theoretical displacement of the control point using an assumption of rigidity. The discrepancies between this theoretical displacement and the actual displacement were addressed through three control configurations that used a linear transfer function, a feedback signal from the digital image point tracking using Proportional and Integral control, and a combination of these two. Performance was evaluated at frequencies ranging from 0.01 – 1 Hz. The combined implementation of the linear transfer function and digital image point tracking feedback showed the greatest improvement over the reference configuration, reducing the error between the desired and measured signal by 51–93%.

实时数字图像点跟踪反馈用于控制玻璃纤维增​​强塑料（GFRP）悬臂梁加载过程中的伺服液压负载链。根据梁上单个控制点的两个平移和一个旋转平面内自由度来定义加载模式。使用单自由度控制和多自由度控制分别进行了测试，分别使用了执行器的独立控制和同时控制。建立了一个参考控制系统，使用刚性假设将三个液压执行器的位移转换为控制点的理论位移。通过使用线性传递函数的三种控制配置解决了理论位移与实际位移之间的差异，使用比例和积分控制，以及这两者的组合，从数字图像点跟踪获得的反馈信号。在0.01 – 1 Hz的频率范围内评估了性能。线性传递函数和数字图像点跟踪反馈的组合实现显示出相对于参考配置的最大改进，将所需信号和测量信号之间的误差降低了51–93％。