A Hierarchical Scheduler Design for Multiple Traffics with Reduced Feedback

Author(s):  
Qiaoyun Sun ◽  
Zhang Haijun ◽  
Sun Kai ◽  
Zhang Shuguang ◽  
Wu Cuiting
Keyword(s):  
Author(s):  
Zhouyou Gu ◽  
Changyang She ◽  
Wibowo Hardjawana ◽  
Simon Lumb ◽  
David McKechnie ◽  
...  

2018 ◽  
Vol 13 (2) ◽  
pp. 251-267 ◽  
Author(s):  
Paul Erick Mendez-Monroy ◽  
Israel Sanchez Dominguez ◽  
Ali Bassam ◽  
Oscar May Tzuc

In the present paper, a fuzzy codesign approach is proposed to deal with the controller and scheduler design for a networked control system which is physically distributed with a shared communication network. The proposed fuzzy controller is applied to generate the control with different sampling-actuation periods, the configuration supposes a strict actuation period disappears the jitter. The proposed fuzzy scheduling is designed to select the sampling-actuation period. So, the fuzzy codesign reduces the rate of transmission when the system is stable through the scheduler while the controller adjusts the control signal. The fuzzy codesign guarantees the stability of all the system if the network uncertainties do not exceed an upper bound and is a low computational cost method implemented with an embedded system. An unstable, nonlinear system is used to evaluate the proposed approach and compared to a hybrid control, the results show greater robustness to multiple lost packets and time delays much larger than the sampling period. (This paper is an extension of [20]. Reprinted (partial) and extended, with permission based on License Number 4275590998661 IEEE, from "Electrical Engineering, Computing Science and Automatic Control, 2017 14th International Conference on")


Author(s):  
Weida Wang ◽  
Xinhua Liu ◽  
Wenjian Liu ◽  
Yang Luo

Due to the complex, uncertainty and dynamic in the modern manufacturing environment, a flexible and robust shop floor scheduler is essential to achieve the system production goals. The paper proposes a design framework of shop floor scheduler. The details of its function modules were discussed. An adaptive scheduling strategy and a XML-based process plan representation were utilized in the scheduler, which acquires the dispatching rule from the knowledge base and uses the build-in on-line simulator to evaluate the rule. These technologies enable the scheduler has a good fine-tune ability and transfers effectively process information to other heterogeneous information systems in a shop floor. The framework introduced in the paper has been demonstrated with a manufacturing case.


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