网络控制系统中采样周期的优化选取方法

对网络环境下的控制系统时延进行了分析,讨论了系统采样周期和网络时延对网络控制系统的影响,以优化控制系统性能为目标,以网络的可调度性为条件,结合系统控制与网络调度,给出了NCS的优化模型和采样频率的求取方法,并给出了优化实例。结果表明:该调度算法既满足了控制系统的性能,又优化了网络调度,提高了网络资源的利用率,为选择网络控制系统采样周期提供了指导方法。

Optimal sampling period selection methed for network control system

The time delay of control system induced by network was analyzed, and the influence of both sampling period and this time delay to network control systems(NCS) was discussed. Based on control performance optimization and network scheduling condition, considering system control and network scheduling, an optimized model and sampling period selection algorithm were proposed. An example shows that the algorithm satisfies performance requirement for NCS, optimizes network scheduling, and improves network efficiency. Furthermore this proposed method is also the guidance for the sampling period selection in NCS.