非线性系统能量有效无线控制的发射功率策略
Transmission power policies for energy-efficient wireless control of nonlinear system
摘要：
提出了一种非线性无线网络控制系统的控制器和传输策略设计方法。我们的目标是确保闭环系统的稳定性，在随机意义上，与给定的控制性能，同时最大限度地减少用于通信的平均功率。该控制器采用仿真设计，忽略网络，发送功率由门限策略给出。这些策略涉及在尝试新的传输之前，从上一次成功传输时刻起等待给定的时间量，以及要求测量的无线信道增益高于给定阈值。研究了两种功率控制律：i）恒定功率和ii）与信道增益成反比的功率电平。我们解释了如何选择的等待时间，信道阈值和功率电平，以最小化诱导的平均通信功率，同时确保所需的控制目标。
英文摘要：
We present a controller and transmission policy design procedure for nonlinear wireless networked control systems. Our objective is to ensure the stability of the closed-loop system, in a stochastic sense, together with given control performance, while minimizing the average power used for communications. The controller is designed by emulation, i.e., ignoring the network, and the transmission power is given by threshold policies. These policies involve waiting a given amount of time since the last successful transmission instant, as well as requiring that the measured wireless channel gain is above a given threshold, before attempting a new transmission. Two power control laws are investigated: i) a constant power and ii) a power level inversely proportional to the channel gain. We explain how to select the waiting time, the channel threshold and the power level to minimize the induced average communication power, while ensuring the desired control objectives.
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