Active noise control with a hybrid control algorithm using an active/passive smart foam actuator

Yeung-Shik Kim; Giman Kim; Chul-Ha Roh

doi:10.1117/12.474678

15 July 2002 Active noise control with a hybrid control algorithm using an active/passive smart foam actuator

Yeung-Shik Kim, Giman Kim, Chul-Ha Roh

Proceedings Volume 4701, Smart Structures and Materials 2002: Smart Structures and Integrated Systems; (2002) https://doi.org/10.1117/12.474678
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

Abstract

This paper presents a theoretical development and an experimental validation of a hybrid control algorithm for the active noise control in the rectangular enclosure with lightly damped boundaries. The hybrid control composes of the adaptive feedforward with feedback loop in which the adaptive feedforward control uses the well-known filtered-x LMS(least mean square) algorithm and the feedback loop consists of the sliding mode controller and observer. The hybrid control has its robustness for both transient and persistent external disturbances and increases the convergence speed due to the reduced variance of the filtered-x signal by adding the feedback loop. The sliding mode control (SMC) is used to incorporate modeling errors, disturbances and uncertainties in the controller deign. This paper also investigates the potential of noise control using a smart foam actuator, which is designed to minimize noise passively using an absorption-foam and actively using an embedded PVDF film driven by an electrical input. The error path dynamics is experimentally identified in the form of the auto-regressive and moving-average using the frequency domain identification technique. Experiment results demonstrate the effectiveness of the hybrid control and the feasibility of the smart foam actuator.

Citation Download Citation

Yeung-Shik Kim, Giman Kim, and Chul-Ha Roh "Active noise control with a hybrid control algorithm using an active/passive smart foam actuator", Proc. SPIE 4701, Smart Structures and Materials 2002: Smart Structures and Integrated Systems, (15 July 2002); https://doi.org/10.1117/12.474678

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