Experimental Investigation of LMS Algorithm for Active Control of Combustion Instabilities:FIR or IIR

2012 ◽  
Author(s):  
Dan Zhao ◽  
Yunfoong Lee
Keyword(s):  
Experimental Investigation ◽  
Active Control ◽  
Lms Algorithm

Experimental investigation of an active control casing treatment of centrifugal compressors

2017 ◽  
Vol 83 ◽  
pp. 107-117 ◽  
Author(s):  
Qichao Yang ◽  
Liansheng Li ◽  
Yuanyang Zhao ◽  
Jun Xiao ◽  
Yue Shu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Active Control ◽  
Centrifugal Compressors ◽  
Casing Treatment

Active Control of Radiated Sound From a Vibrating Plate

2001 ◽  
Author(s):  
Jin-Seok Hong ◽  
Kihong Shin ◽  
Choong-Hwi Lee ◽  
Jae-Eung Oh
Keyword(s):  
Transfer Function ◽  
Active Control ◽  
Bending Moment ◽  
Harmonic Excitation ◽  
Lms Algorithm ◽  
Real Time Control ◽  
Linear Filters ◽  
Piezoceramic Actuator ◽  
Radiated Sound ◽  
Vibrating Plate

Abstract In this paper, an experimental study is described for active control of radiation sound from a vibrating plate under a harmonic excitation at a specific point. Two piezoceramic actuators are used to provide control inputs to the structure. The notion of control sensitivity of the plate bending moment is introduced to find the locations of piezoceramic actuators. Each piezoceramic actuator is located at the position that has the largest control sensitivity in order to maximize the control performance. The measurement sensors are two accelerometers whose outputs are processed through an array of linear filters. The impulse response of each filter is constructed from the vibro-acoustic path transfer function by accelerometers and microphones. The active structural acoustic control system is designed to estimate and reduce the radiated sound pressure on the basis of this transfer function. A 2 by 2 Filtered-x LMS algorithm is used, and is implemented on a TMS320C30 DSP board for the real-time control.

Channel self-adjusting filtered-x LMS algorithm for active control of vehicle road noise

2017 ◽  
Vol 13 (3/4) ◽  
pp. 267 ◽  
Author(s):  
Tao Feng ◽  
Guohua Sun ◽  
Mingfeng Li ◽  
Teik C. Lim
Keyword(s):  
Active Control ◽  
Lms Algorithm ◽  
Road Noise

Active Control of Elastodynamic Vibrations of a Four-Bar Mechanism System With a Smart Coupler Link Using Optimal Multivariable Control: Experimental Implementation

1996 ◽  
Author(s):  
Muhammad Sannah ◽  
Ahmad Smaili
Keyword(s):  
Experimental Investigation ◽  
Active Control ◽  
Smart Materials ◽  
Controller Design ◽  
Linear Quadratic Regulator ◽  
Piezoelectric Sensor ◽  
High Mode ◽  
Multivariable Control ◽  
Linear Quadratic ◽  
Luenberger Observer

Abstract This paper presents an experimental investigation on active control of the elastodynamic response of a four-bar (4R) mechanism system using “smart” materials featuring piezoelectric sensor/actuator (S/A) pairs and muitivariable optimal control. The experimental (4R) mechanism is made such that its coupler link is flexible, its follower link is slightly less flexible and its crank is relatively rigid. Two thin plate-type piezoceramic S/A pairs are bonded to the flanks of the coupler link at the high strain locations corresponding to the first and second vibration modes. Based on the optimal multivariable control theory, a controller which consists of a linear quadratic regulator (LQR) and a Luenberger observer as a state estimator is designed and implemented. The results of the experimental investigation prove that in order to prevent high mode excitations, the controller design should be based on the modes representing vibrations of all components comprising the mechanism system rather than the modes corresponding to the link to which the S/A pairs are bonded. Response amplitude attenuation ratios up to 50 percent are achieved and high mode excitations are prevented.

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