A Scheduling Algorithm for Wireless Networked Control System Based on IEEE 802.15.4 Protocol
A networked control and network scheduling technology, applied in the field of control and network scheduling algorithms, can solve problems such as high flexibility and other outstanding advantages that have not been brought into play
Active Publication Date: 2021-06-08
ZHEJIANG UNIV OF TECH
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However, in order to simplify the joint design of control and communication, most of the existing technologies are only applicable to the case where the IEEE 802.15.4 wireless network is private, that is, all communication resources are used by the control system, making the wireless communication network compared with the traditional wired network The outstanding advantages such as easy deployment, easy networking, and high flexibility have not been brought into play, that is, the wireless network cannot be used as a shared network to allow different users to join and leave
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[0062] In order to facilitate the technical personnel to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and computer simulation.
[0063] A scheduling algorithm for a wireless networked control system based on the IEEE 802.15.4 protocol, comprising the following steps:
[0064] Step 1. Calculate the control gain sequence K;
[0065] The given control system model is as follows:
[0066]
[0067] The initial value of the system u(0)=0.
[0068] It is easy to know that n=2, m=1. Order N p =20,N u =10, Q is the 40th order identity matrix, R is τ sc,k +10 order identity matrix. According to formula (2), when τ sc,k =1,2,…,10, the feedback gain of and remove the subblock From this, the control gain sequence of this algorithm can be obtained as follows:
[0069]
[0070] Step 2: Calculate update deadline k i+1 ;
[0071] Known (1) (3), write the Matlab...
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A scheduling algorithm for a wireless networked control system based on the IEEE 802.15.4 protocol, including: Step 1: Calculating the control gain sequence K; Step 2: Calculating the update deadline k i+1 ; Step 3: Formulate request sampling protocol; Step 4: Design dual GTS network scheduling algorithm; Step 5: Design hybrid network scheduling algorithm. The present invention introduces a group of delay-related control gains into the traditional self-triggering control to calculate the sampling interval, which reduces the conservatism of the controller; uses the beacon characteristics of the IEEE 802.15.4 protocol to formulate a sampling request mechanism, which reduces the The burden of energy-constrained sensors; designing network scheduling algorithms based on the idea that reliable communication resources are used only in emergency situations. The invention can largely reduce the dependence of the control system on reliable communication resources on the premise of satisfying certain control performance requirements.
Description
technical field [0001] The invention relates to the field of wireless networked control systems, in particular to a control and network scheduling algorithm for optimizing the overall performance of the wireless networked control system based on the IEEE 802.15.4 protocol. Background technique [0002] With the development of wireless communication technology, more and more wireless communication networks are used for data transmission of control systems, and form the research topic of wireless networked control systems. The current applications of wireless network-based control systems include smart homes, smart transportation, and smart agriculture. Looking into the future, the next generation of intelligent systems, such as the Internet of Things, cyber-physical fusion systems, etc., all rely on wireless communication to connect various components, so the research on wireless networked control systems is particularly important. However, as the intersection field of contr...
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IPC IPC(8): H04W4/38H04W4/70H04W28/06
CPCH04W28/06H04W4/38H04W4/70Y02D30/70
Inventor 赵云波何江涛唐敏倪洪杰余世明
Owner ZHEJIANG UNIV OF TECH