Stereo Sound Field Controller Design Using Partial Model Matching on the Frequency Domain

• Published in: Journal of Advanced Mechanical Design, Systems, and Manufacturing Vol. 1; no. 1; pp. 170 - 180
• Main Authors: KUMON, Makoto, MIIKE, Katsuhiro, EGUCHI, Kazuki, MIZUMOTO, Ikuro, IWAI, Zenta
• Format: Journal Article
• Language: English
• Published: The Japan Society of Mechanical Engineers 01.01.2007
• Subjects: Acoustic noise; Acoustics; Control systems; Control theory; Design engineering; Frequency domains; Mathematical models; Measurement and Control; Model matching; Noise Control; Partial Model Matching on Frequency Domain; Sound Field Control; Two-Degree-of-Freedom Controller
• ISSN: 1881-3054; 1881-3054
• DOI: 10.1299/jamdsm.1.170

The objective of sound field control is to make the acoustic characteristics of a listening room close to those of the desired system. Conventional methods apply feedforward controllers, such as digital filters, to achieve this objective. However, feedback controllers are also necessary in order to attenuate noise or to compensate the uncertainty of the acoustic characteristics of the listening room. Since acoustic characteristics are well modeled on the frequency domain, it is efficient to design controllers with respect to frequency responses, but it is difficult to design a multi input multi output (MIMO) control system on a wide frequency domain. In the present study, a partial model matching method on the frequency domain was adopted because this method requires only sampled data, rather than complex mathematical models of the plant, in order to design controllers for MIMO systems. The partial model matching method was applied to design two-degree-of-freedom controllers for acoustic equalization and noise reduction. Experiments demonstrated effectiveness of the proposed method.