Switching Rates to Save Resources in Distributed Computer Control Systems

• Type: Chapter or Part of a Book
• Date: 2006

Authors

Mauro, M (Author) Other; Luis Almeida (Author) Other; Fuertes, JM (Author) Other

Book

Title: Information Control Problems in Manufacturing 2006

Pages: 111-116

ISBN: 9780080446547

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-007-ZKS

DOI: 10.1016/b978-008044654-7/50153-9

Abstract (EN): Recent work has shown that switching on-line between controllers using different rates might be beneficial-for example, to cope with scheduling or network induced jitter. This chapter extends this approach to achieve a different purpose-that is, to reduce the resource utilization of a closed-loop controller, namely CPU and network bandwidth, while maintaining its control performance. The proposed approach, named dual-rate, uses two controllers tuned for two sampling rates, a higher nominal rate determined by the usual rules, and a substantially lower rate that is used whenever the system is operating close to stationarity. This approach is applied to a simulated steer-by-wire automotive application based on Truetime. It is shown that the dual-rate approach allows saving substantial CPU and network bandwidth while maintaining a control performance near the one achieved with the nominal controller alone. The released resources can be used to execute other tasks, transmit other messages or simply facilitate error recovery with temporal redundancy. © 2006 Copyright

Language: English

Type (Professor's evaluation): Scientific