无线网络控制系统的PID控制器设计
发布时间：2019-01-22 09:26
【摘要】：无线网络控制系统是近年来逐渐兴起的一种以无线传输通信为基础的分布式控制系统。它利用无线网络把分布在不同位置的系统节点连接起来,摆脱了控制系统对金属传输介质的依赖,具有成本低、维护方便,易于扩展等优点。但是由于无线网络通信的脆弱性,数据传输延时、数据丢包等因素使无线网络控制系统的控制器设计工作变得十分困难。PID控制器广泛应用于无线网络控制系统,它具有较强的鲁棒性和通用性,且易于在工业控制系统中实现。本文以无线网络控制系统为研究方向,以提高系统抗干扰性,降低网络通信延迟对系统的负面影响为目的,探讨了无线网络控制系统的PID控制问题。首先,对影响无线网络控制系统的基本因素进行了详细的阐述,并着重介绍了网络时延这一主要影响因素,分析了时延对系统稳定性的影响,验证了时延的叠加性。然后,介绍了内模控制的相关基础理论,构建了具有PID控制器形式的IMC-PID控制器,把该控制器加入到无线网络控制系统,并利用粒子群算法对IMC-PID控制器引入的加权系数进行寻优。接着,分析了广义预测控制的相关数学理论,研究了基于广义预测控制的PID控制器,提出了改进策略,并把控制器应用于无线网络控制系统。最后,对所研究的控制器进行了仿真分析,仿真结果表明,采用粒子群优化的IMC-PID控制器和改进后的基于广义预测的PID控制器都具有较强的鲁棒性,降低了系统的超调量,抑制了干扰作用,能够对网络时延进行补偿。从而提高了无线网络控制系统的控制质量。
[Abstract]:Wireless network control system (WNCS) is a distributed control system based on wireless transmission and communication. It uses the wireless network to connect the nodes distributed in different locations, and gets rid of the dependence of the control system on the metal transmission medium. It has the advantages of low cost, convenient maintenance and easy expansion. However, due to the fragility of wireless network communication, data transmission delay, data packet loss and other factors, the controller design of wireless network control system becomes very difficult. PID controller is widely used in wireless network control system. It has strong robustness and generality, and is easy to be realized in industrial control system. In order to improve the system anti-jamming and reduce the negative influence of network communication delay, this paper discusses the PID control problem of wireless network control system in the research direction of wireless network control system. Firstly, the basic factors affecting the wireless networked control system are described in detail, and the network delay is introduced in detail. The influence of the delay on the stability of the system is analyzed, and the superposition of the delay is verified. Then, the basic theory of internal model control is introduced, and the IMC-PID controller with the form of PID controller is constructed, and the controller is added to the wireless network control system. Particle swarm optimization algorithm is used to optimize the weighting coefficient introduced by IMC-PID controller. Then, the related mathematical theory of generalized predictive control is analyzed, the PID controller based on generalized predictive control is studied, the improved strategy is proposed, and the controller is applied to wireless network control system. Finally, the simulation results show that both the IMC-PID controller based on particle swarm optimization and the improved PID controller based on generalized prediction have strong robustness and reduce the overshoot of the system. The interference is suppressed and the network delay can be compensated. Thus, the control quality of wireless network control system is improved.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273
[Abstract]:Wireless network control system (WNCS) is a distributed control system based on wireless transmission and communication. It uses the wireless network to connect the nodes distributed in different locations, and gets rid of the dependence of the control system on the metal transmission medium. It has the advantages of low cost, convenient maintenance and easy expansion. However, due to the fragility of wireless network communication, data transmission delay, data packet loss and other factors, the controller design of wireless network control system becomes very difficult. PID controller is widely used in wireless network control system. It has strong robustness and generality, and is easy to be realized in industrial control system. In order to improve the system anti-jamming and reduce the negative influence of network communication delay, this paper discusses the PID control problem of wireless network control system in the research direction of wireless network control system. Firstly, the basic factors affecting the wireless networked control system are described in detail, and the network delay is introduced in detail. The influence of the delay on the stability of the system is analyzed, and the superposition of the delay is verified. Then, the basic theory of internal model control is introduced, and the IMC-PID controller with the form of PID controller is constructed, and the controller is added to the wireless network control system. Particle swarm optimization algorithm is used to optimize the weighting coefficient introduced by IMC-PID controller. Then, the related mathematical theory of generalized predictive control is analyzed, the PID controller based on generalized predictive control is studied, the improved strategy is proposed, and the controller is applied to wireless network control system. Finally, the simulation results show that both the IMC-PID controller based on particle swarm optimization and the improved PID controller based on generalized prediction have strong robustness and reduce the overshoot of the system. The interference is suppressed and the network delay can be compensated. Thus, the control quality of wireless network control system is improved.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273
【参考文献】
相关期刊论文 前10条
1 林强;吴国伟;万安民;于军帅;;一种无线网络控制系统的时空实时任务调度算法[J];计算机科学;2016年S2期
2 林强;吴国伟;刘sパ，
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