Piezoelectric nanogenerators recently emerged as a turning point in the design of energy-aware and energy harvesting transmission scheme at the nanoscale. This work considers their adoption in diffusion-based molecular communications, proposing a power control strategy based on feedback control theory. In particular, the transmission power of an electrochemical nanodevice fed by a piezoelectric nanogenerator is dynamically set proportionally to the available energy budget, by using a closed-loop control scheme. The resulting system is analytically modeled with a discrete-time nonlinear state equation. The range of acceptable values of the proportional gain is theoretically derived by studying technological constraints and global asymptotic stability. The impact of the proportional gain on both output variance and time constant of the linearized system around the equilibrium point is also investigated. Computer simulations validate the theoretical analysis under different parameter settings. The comparison against state of the art transmission scheme also demonstrates the unique ability of the conceived approach to ensure, at the equilibrium, the targeted performance level.

中文翻译：

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基于扩散的分子通信系统中能量收集的反馈控制策略

压电纳米发电机最近成为纳米级能量感知和能量收集传输方案设计的转折点。这项工作考虑了它们在基于扩散的分子通信中的采用，提出了基于反馈控制理论的功率控制策略。特别地，通过使用闭环控制方案，由压电纳米发电机馈送的电化学纳米装置的传输功率与可用能量预算成比例地动态设置。用离散时间非线性状态方程对生成的系统进行解析建模。理论上，通过研究技术约束和全局渐近稳定性，可以得出比例增益的可接受值范围。还研究了比例增益对平衡点附近线性系统的输出方差和时间常数的影响。计算机仿真验证了在不同参数设置下的理论分析。与最先进的传输方案的比较也证明了所构想的方法在平衡时确保目标性能水平的独特能力。