基于时延和噪声约束网络化系统性能极限

Performance limitation of networked system based on network-induced delay and noise constraints

基于网络时延与噪声约束的网络化系统跟踪性能极限,在研究网络参数时主要考虑前向和反馈通道同时存在噪声和反馈通道存在时延的问题。网络化系统的跟踪性能极限表达式是通过采用谱分解技术并选择最优的单自由度控制器的方法来得到。结果表明网络化系统的跟踪性能极限与网络化系统的非最小相位零点、不稳定极点、网络诱导时延、网络噪声和输入信号有关。仿真结果验证了该方法的有效性。

To study the performance limitation of networked system based on network-induced delay and noise constraints.When studying network parameters,mainly consider the problem about the presence of noises in the forward and feedback channels and the existence of network-induced delay in the feedback channel.The tracking performance limitation expression is achieved by using the spectral decomposition technique and selecting the optimal one-parameter structure.The obtained result shows that the tracking performance limitation is related to the non-minimum phase zeroes,the unstable poles,network-induced delay,channel noises and input signal of networked system.Finally,some particular examples are provided to illustrate the efficiency of the proposed method.