网络化系统的多率采样控制与变采样动态调度的研究

项目名称： 网络化系统的多率采样控制与变采样动态调度的研究

项目编号： No.61263003

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 王志文

作者单位： 兰州理工大学

项目金额： 43万元

中文摘要： 针对目前研究中普遍采用的同步均匀等周期采样方式，考虑网络化系统的本质特征，提出网络化系统的多率采样控制，以完善网络控制系统理论体系，为构造出功能更强、更切合实际的网络控制系统提供理论依据；综合考虑网络资源限制以及通讯网络本身固有的数字特征，进行多率采样控制器的设计，该控制器实质上是一个周期时变控制器，有望实现许多常规单采样率线性时不变控制器所无法实现的、更加符合网络化系统的控制目标；对于网络化多率采样系统，针对有限带宽这一瓶颈问题，结合多率采样的快-慢与慢-快特性，提出基于变采样周期的协同设计方法，考虑每一网络节点的实时带宽需求和响应能力，动态调整各子系统的采样周期，以保证系统的整体性能和实现有限带宽的最优配置。

中文关键词： 网络化系统；多率采样；采样周期；变采样；协同设计

英文摘要： In view of the synchronized uniform equidistant sampling method that widely used in network control system (NCS), multi-rate sampling control for NCS is presented by considering the natural characteristics of NCS, which can promote the theory of NCS and provide the theory grounds for the construction of NCS with more function and realistic. The design of multi-rate controller is implemented by comprehensive consideration of the network resource constraints and the inherent digital features of communication network. The controller is essentially a periodic time-varying controller and expected to achieve some control objectives which can not be realized by conventional single-rate linear time-invariant controller and suitable for NCS further. For networked multi-rate control system, co-design method based on variable sampling period is proposed in view of the bottleneck problem of limited bandwidth and the fast-slow and slow-fast characteristics of multi-rate sampling. Taking the real-time bandwidth requirement and the response ability of each network node into account, the whole system performance can be guaranteed and the optimal allocation of limited bandwidth can be realized by adjusting the sampling period of each subsystem dynamically.

英文关键词： networked control systems；multi-rate sampling；sampling period；variable sampling；co-design