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Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
Published on: June 25, 2021
Tracking accuracy of cyber-physical systems over bandwidth-limited channel
Xian-He Zhang1, Bo Li2, Xiao-Wei Jiang3
1School of Electrical Engineering and Automation, Hubei Normal University, Huangshi 435002, P. R. China.
Abstract:
Taking the H2 norm of the tracking error signal as the performance index, this study examines the output tracking performance limits of networked systems with bandwidth-limited communication channels. Two linear time-invariant filters are used to characterize the bandwidth constraints and additive colored Gaussian noise (ACGN), respectively. By invoking some factorization techniques and Youla parameterization of two-parameter controllers, the fundamental tracking performance limitations are achieved. From the exact expressions, it is evident that there exists a close relationship between performance limitations and the essential features of the plant. Further, it is also concluded that the limited bandwidth and ACGN generally have adverse effects on tracking performance. Finally, the theoretical results are verified through a practical plant example. For a linear dual-freedom vehicle system, the results also show the effectiveness of the proposed method.
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