Abstract
This paper presents a novel and advanced remotely controlled laboratory for conducting Active Noise Control (ANC), acoustic and Digital Signal Processing (DSP) experiments. The laboratory facility, recently developed by Blekinge Institute of Technology (BTH) Sweden, supports remote learning through internet covering beginners level such as simple experimental measurements to advanced users and even researchers such as algorithm development and their performance evaluation on DSP. The required software development for ANC algorithms and equipment control are carried out anywhere in the world remotely from an internet-connected client PC using a standard web browser. The paper describes in detail how ANC, acoustic and DSP experiments can be performed remotely The necessary steps involved in an ANC experiment such as validity of ANC, forward path estimation and active control applied to a broad band random noise [0-200Hz] in a ventilation duct will be described in detail. The limitations and challenges such as the forward path and nonlinearities pertinent to the remote laboratory setup will be described for the guidance of the user. Based on the acoustic properties of the ventilation duct some of the possible acoustic experiments such as mode shapes analysis and standing waves analysis etc. will also be discussed in the paper.
Highlights
Students require a considerable amount of hands-on experience in Engineering Education in general and in the fields of Active Noise Control (ANC) and acoustics
The experimental setup required for ANC experiments broadly consists of an application test bed or device under test (DUT), Digital Signal Processor (DSP) board along with transducers, data acquisition and analysis equipment supported by computer based analysis tools
The remote laboratory presented in this paper enables students to enhance their learning and acquire experience on working with real systems and equipment in a wide range of fields
Summary
Students require a considerable amount of hands-on experience in Engineering Education in general and in the fields of Active Noise Control (ANC) and acoustics. The experimental setup required for ANC experiments broadly consists of an application test bed or device under test (DUT), Digital Signal Processor (DSP) board along with transducers, data acquisition and analysis equipment supported by computer based analysis tools. These equipment are expensive and usually a single set is available to the students in a time limited scheduled laboratory session. The proposed system is primarily focused on active noise control in a ventilation duct, the system allows general experiments in the field of acoustics and digital signal processor
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