In this article, we investigate an innovative solution, to implement high sampling frequency industrial control by means of networked embedded systems connected via WiFi. The basic idea relies on a co-design approach for the control application, which is then able to adapt its sampling period, as well as to tune the Wi-Fi parameters, according to the feedback coming from the network. To this end, we implemented a cross-layer architecture acting at both application and data-link layers, which features a robust frame-delay state estimator, a time-efficient communication policy, and a specific tuning of the critical protocol parameters. Suitable hardware-in-the-loop experiments have been carried out exploiting two different embedded systems available off-the-shelf. The preliminary results, obtained from an extensive experimental campaign, are encouraging since they show that the proposed architecture enables industrial control applications requiring a sampling rate up to 1000 Hz, even in presence of communication impairments.

中文翻译：

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时间紧迫的无线联网嵌入式系统：可行性和实验评估

在本文中，我们将研究一种创新的解决方案，以通过WiFi连接的网络嵌入式系统来实现高采样频率的工业控制。基本思想依赖于控制应用程序的协同设计方法，该方法随后可以根据来自网络的反馈调整其采样周期，并调整Wi-Fi参数。为此，我们实现了同时作用于应用程序和数据链路层的跨层体系结构，该体系结构具有健壮的帧延迟状态估计器，省时的通信策略以及对关键协议参数的特定调整。利用两个现成的不同嵌入式系统，已经进行了合适的硬件在环实验。从广泛的实验活动中获得的初步结果，