Wireless networked control systems for the Industrial Internet of Things (IIoT) require low-latency communication techniques that are very reliable and resilient. In this article, we investigate a coding-free control method to achieve ultralow latency communications in single-controller-multiplant networked control systems for both slow- and fast-fading channels. We formulate a power allocation problem to optimize the sum cost functions of multiple plants, subject to the plant stabilization condition and the controller's power limit. Although the optimization problem is a nonconvex one, we derive a closed-form solution, which indicates that the optimal power allocation policy for stabilizing the plants with different channel conditions is reminiscent of the channel-inversion policy. We numerically compare the performance of the proposed coding-free control method and the conventional coding-based control methods in terms of the control performance (i.e., the cost function) of a plant, which shows that the coding-free method is superior in a practical range of signal-to-noise ratios.

中文翻译：

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用于工业物联网的具有免编码数据传输的无线网络控制系统


工业物联网 (IIoT) 的无线网络控制系统需要非常可靠和有弹性的低延迟通信技术。在本文中，我们研究了一种无编码控制方法，以在单控制器多设备网络控制系统中实现慢衰落和快衰落信道的超低延迟通信。我们制定了一个功率分配问题，以优化多个工厂的总成本函数，但须遵守工厂稳定条件和控制器的功率限制。尽管优化问题是一个非凸问题，但我们得出了一个封闭式解，这表明稳定不同通道条件下的电站的最优功率分配策略让人想起通道反转策略。我们在被控对象的控制性能（即成本函数）方面对所提出的无编码控制方法和传统的基于编码的控制方法的性能进行了数值比较，这表明无编码方法在信噪比的实际范围。