標題: Optimal Controller Design for Virtual Sensing With Independent Noise Source Measurement
作者: Liang, Keng-Wei
Hu, Jwu-Sheng
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Active noise control;soft sensing;virtual sensing
公開日期: 1-Jan-2019
摘要: In certain applications, when the placement of sensors at the target location is not feasible, a common practice is to obtain the target information indirectly via sensors at other locations. This technique is known as virtual sensing (or soft sensing), and involves various signal processing techniques. Virtual sensing is applied to such systems to estimate the error signal for feedback control. However, issues regarding both stability and performance degradation become significant because the estimation is not precise. In this brief, we propose a virtual sensing control (VSC) method using a feedforward controller to compensate the mismatch between an error sensor and virtual sensor under the feedback control. The results show that when an independent noise source measurement is available, a feedforward controller is more appropriate than estimation as it maintains the stability of the feedback system while achieving a good performance enhancement. For such a VSC system, the design of both feedforward and feedback controllers is coupled. In this brief, we derive an optimal controller design method to maximize the noise reduction capability. We show the advantages of the proposed VSC method by applying it to the implementation of an active noise control system.
URI: http://dx.doi.org/10.1109/TCST.2017.2761760
http://hdl.handle.net/11536/148582
ISSN: 1063-6536
DOI: 10.1109/TCST.2017.2761760
期刊: IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
Volume: 27
起始頁: 363
結束頁: 369
Appears in Collections:Articles