Real-time control under clock offsets between sensors and controllers
Real-time control under clock offsets between sensors and controllers
复制标题
传感器和控制器之间时钟偏移下的实时控制
DOI：
10.1145/2728606.2728613
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. Hespanha
中科院分区：
文献类型：
--
作者：
Kunihisa Okano;M. Wakaiki;J. Hespanha
研究了时钟失配对空间分布式实时控制系统的影响。我们考虑这样一种配置，其中传感器测量由一个处理器收集，该处理器通过网络将测量传输到另一个控制/驱动处理器，但这两个处理器没有公共时钟。由于时钟不匹配，测量的实际时间和传感器报告的时间之间会有偏差。我们的目标是发现由时钟不匹配引起的稳定控制回路的能力的基本限制。我们考虑了时变的有界偏移量，并导出了反馈系统稳定性的偏移量上界的限制。对于标量线性过程，存在一个临界极限，它取决于被控对象的不稳定程度和标称采样周期。相反，对于向量线性过程，如果过程动力学至少有两个不同的实特征值，则在偏移界上没有基本限制。
This paper studies the impact of clock mismatches in spatially distributed real-time control systems. We consider a configuration in which sensor measurements are collected by one processor that transmits the measurements to another control/actuation processor through a network, but the two processors do not have a common clock. Due to the clock mismatch, there will be an offset between the actual time at which a measurement is taken and the time reported by the sensor. Our goal is to discover fundamental limitations to the ability to stabilize the control loop arising from the clocks mismatch. We consider time-varying bounded offsets and derive limitations on the offset bound for the stability of the feedback system. For the case of a scalar linear process, there exists a critical limitation, which depends on the level of instability of the plant and the nominal sampling period. In contrast, for the vector linear processes, if the process dynamics has at least two distinct real eigenvalues, then there is no fundamental limitation on the offset bound.
影响因子：
16.6
作者：
Davis, Robert I.;Burns, Alan
通讯作者：
Burns, Alan