基于信息物理融合系统的紧耦合网络控制方法

doi:10.11959/j.issn.1000-436x.2015041

摘要/Abstract

摘要：

从信息物理融合系统(CPS,cyber physical system)的设计理念来看，要求系统中的通信计算部分和被控制物理对象进行紧密耦合操作。遵照这种紧耦合操作原则，针对无线网络控制系统(WNCS,wireless networked control system)，提出一种紧耦合自适应模糊控制方法。模拟实验数据显示这种设计方法能根据实时的 NCS 紧迫度和网络的拥塞度有效地调整被控系统的采样周期及网络信道占用优先级，从而优化利用了有限的网络资源，改善了整个网络控制系统的性能。

关键词: 自适应模糊控制, 信息物理融合系统, 网络控制系统, 紧耦合

Abstract:

From cyber physical system perspective,tightly coupling the communications and computing aspects with physical dynamics is profound.This characteristic is investigated for wireless networked control systems (WNCS).Following the tight coupling principle of CPS,a tight coupling adaptive fuzzy controlling methodology for WNCS is proposed.Through simulation experiments,it is showed that proposed method could adaptively adjust the controlled system's sample period and network channel access priority according to its real time control urgency and the network traffic condition,so as to optimize network utilization and improve the performances of the whole NCS.

Key words: adaptive fuzzy control, cyber physical system, networked control system, tight coupling

林进挚,吴英,吴功宜,徐敬东. 基于信息物理融合系统的紧耦合网络控制方法[J]. 通信学报, 2015, 36(2): 126-136.

Jin-zhi LIN,Ying WU,Gong-yi WU,Jing-dong XU. Tight coupling approach for networked control systems from cyber physical system perspective[J]. Journal on Communications, 2015, 36(2): 126-136.

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AC	CW_min	CW_max	AIFSN
0	aCW_min	aCW_max	3
1	(aCW_min+1)/2?1	(aCW_max+1)/2?1	2
2	(aCW_min+1)/4?1	(aCW_max+1)/4?1	1

DH/Q			U
DH/Q	L	ML	M	MH	H
L	PS/S	ZE/S	NS/S	NB/S	NB/S
CM	PB/S	PS/S	ZE/M	NS/M	NB/B
H	PB/M	PB/M	PS/B	ZE/B	NS/B

记号	物理量	单位	值
I	转动惯量(摆)	kg·m²	0.003 4
m	摆质量	kg	0.109
M	小车质量	kg	1.096
l	摆长	m	0.25
b	摩擦系数	N/m/s	0.1
x	小车坐标	m	0（初值）
Θ	摆角	rad	0（初值）

类别	参数	值
PHY	Transmission power	1 mW
	SINR data capture	10 dB
MAC	Slot time	13 μs
	SIFS time	32 μs
	aCW_min	31
	aCW_max	1 023
	Symbol duration	8μs (3 Mbit·s^?1)
Application	Packet size	200 byte
	Packet send rate	50 packet/s (T=20 ms)

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