首页> 外文会议>Proceedings of the Twenty-sixth annual meeting of the American Society for Precision Engineering >EFFECT OF SAMPLING JITTER AND CONTROL JITTER ON POSITIONING ERROR IN MOTION CONTROL SYSTEMS
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EFFECT OF SAMPLING JITTER AND CONTROL JITTER ON POSITIONING ERROR IN MOTION CONTROL SYSTEMS

机译:运动控制系统中采样抖动和控制抖动对定位误差的影响

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摘要

In a digital motion control system, there are two periodic events connecting the discrete domain of a digital controller to the continuous domain of the plant to be controlled: a feedback sampling event that samples a sensor feedback signal; and a control updating event that updates the controller's output signal via a zero-order-hold (ZOH). Generally, these two events are assumed to happen simultaneously at evenly spaced intervals of sampling period T_0. However, in reality the sampling event intervals are not evenly spaced due to factors such as resource sharing and task scheduling. These sampling event and control event temporal deviations from the ideal timing are referred to as sampling jitter and control jitter, respectively.
机译:在数字运动控制系统中,有两个周期性事件将数字控制器的离散域连接到要控制的工厂的连续域:一个对传感器反馈信号进行采样的反馈采样事件;一个对传感器反馈信号进行采样的反馈采样事件。控制更新事件通过零阶保持(ZOH)更新控制器的输出信号。通常,假定这两个事件以采样周期T_0的均匀间隔同时发生。但是,实际上,由于诸如资源共享和任务调度之类的因素,采样事件间隔并不是均匀分布的。这些与理想定时的采样事件和控制事件的时间偏差分别称为采样抖动和控制抖动。

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