| 郝小梅,赵云波.基于动态信道切换的无线网络化控制系统的资源调度策略[J].高技术通讯(中文),2023,33(9):973~980 |
| 基于动态信道切换的无线网络化控制系统的资源调度策略 |
| Dynamic channel switching based resource scheduling strategy for wireless networked control systems |
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| DOI：10. 3772/ j. issn. 1002-0470. 2023. 09. 009 |
| 中文关键词: 无线网络化控制系统(WNCS)； 网络资源； 动态信道切换； 估计器； 控制信号误差 |
| 英文关键词: wireless networked control system (WNCS), network resources, dynamic channel switching, estimator, control signal error |
| 基金项目: |
| 作者 | 单位 | | 郝小梅 | （浙江工业大学信息工程学院杭州 310023） | | 赵云波 | |
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| 中文摘要: |
| 本文针对通信网络中存在竞争和非竞争信道的无线网络化控制系统(WNCS)，提出了一种基于估计器的信道选择策略，在保证控制系统稳定性的同时尽可能地节约了宝贵的非竞争信道资源。在无线网络化控制系统中，控制信号通过竞争信道传输时可能发生数据包丢失，导致执行器无法收到实时的控制信号。而传感器端未知控制信号的实际传输情况，因而也无法得知每个时刻执行器所使用的控制信号。针对这种情况，本文首先设计了估计器来估计执行器端上一时刻实际使用的控制信号，再通过信道选择策略来约束执行器端使用控制信号的误差。最后，在所提信道选择策略下设计控制器来保证控制系统稳定。本文通过数值仿真验证了所提算法的有效性。 |
| 英文摘要: |
| A channel selection strategy based on estimator is proposed for the wireless networked control system (WNCS) with contention and non contention channels in the communication network, which saves the precious non contention channel resources as much as possible while ensuring the stability of the control system. In a wireless networked control system, data packet loss may occur when the control signal is transmitted through the contention channel, so that the actuator cannot receive the real time control signal. However, the sensor terminal does not know the actual transmission of the control signal, so it is impossible to know the control signal used by the actuator at each moment. In view of this situation, this paper first designs an estimator to estimate the control signal actually used by the actuator at the last moment, and then uses the channel selection strategy to constrain the error of the control signal used by the actuator. Finally, a controller is designed under the proposed channel selection strategy to ensure the stability of the control system. The effectiveness of the proposed algorithm is verified by numerical simulation. |
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