Title :
Discrete-time H2/H∞ control of an acoustic duct: delta-domain design and experimental results
Author :
Erwin, R. Scott ; Bernstein, Dennis S.
Author_Institution :
Dept. of Aerosp. Eng., Michigan Univ., Ann Arbor, MI, USA
Abstract :
Concerns experiments on an acoustic duct constructed of 4 inch diameter PVC plastic piping. Electret condenser microphones are used as sensors. These omnidirectional microphones measure acoustic pressure and have an approximately flat frequency response over a frequency range of 20 Hz-20 kHz. Acoustic actuation for both disturbance and control was provided by 4 inch woofer speakers, which have a flat response range of approximately 50 Hz-7 kHz. For control purposes, the inputs are the input voltages to the disturbance and control speaker amplifiers, while the measurement signals are the output voltages from the measurement and performance microphone amplifiers. In this way, the combined dynamic characteristics of the amplifiers, speakers, and microphones can be identified directly from experimental data. Controllers are implemented using a dSPACE model DS1102 real-time control board
Keywords :
H∞ control; acoustic intensity measurement; acoustic variables control; acoustic waveguides; discrete time systems; microphones; 20 Hz to 20 kHz; 4 in; PVC plastic piping; acoustic actuation; acoustic duct; acoustic pressure measurement; approximately flat frequency response; combined dynamic characteristics; dSPACE model DS1102 real-time control board; delta-domain design; discrete-time H2/H∞ control; disturbance; electret condenser microphones; microphone amplifiers; omnidirectional microphones; sensors; speaker amplifiers; woofer speakers; Acoustic measurements; Acoustic sensors; Ducts; Electrets; Frequency measurement; Loudspeakers; Microphones; Plastics; Pressure measurement; Voltage control;
Conference_Titel :
Decision and Control, 1997., Proceedings of the 36th IEEE Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4187-2
DOI :
10.1109/CDC.1997.650630
