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Session 1626

Undergraduate Design Projects in a Laboratory for Real-Time Signal Processing and Control

Richard J. Kozick Bucknell University I

Abstract

A laboratory containing digital signal processing (DSP) units and computer workstations has recently been established at Bucknell University. The DSP units are programmed and controlled through a graphical interface on the workstations. The graphical interface provides an integrated environment for simulation and real-time implementation of signal processing and control algorithms. The laboratory is well-suited for undergraduate student design projects, and several such projects are described in the paper.

1 Introduction

An integrated laboratory for real-time signal processing and control has been established at Buck- nell University. The laboratory has ten digital signal processing (DSP) units from dSPACE Corporation [1] and ten Sun workstations. The dSPACE units are controlled and programmed through Simulink [2], which is a graphical interface to Matlab [3]. The dSPACE/Simulink combination provides an integrated environment for modeling, simulation, and real-time implementation.

The typical mode of operation in the laboratory is to first develop a block diagram in Simulink, then run a simulation on the Sun workstation, and finally to download a real-time implementation for execution on the dSPACE unit. Only a minor modification is required to convert a block diagram from the simulation module to the real-time implementation. Simulink allows parameter updates on-the-fly as the program runs on the dSPACE unit. The dSPACE/Simulink environment facilitates rapid prototyping of real-time algorithms and allows “what if” investigations into the effects of parameter variations. The graphical interface shields students from low-level details so they can focus on higher-level design issues. The close relationship between simulation and real-time implementation makes the laboratory ideally suited for undergraduate student design projects. Parameters are varied easily in both the simulation and the real-time implementation, so simulation results can be matched with experimental results and design specifications can be achieved. I

The laboratory environment has been used in several undergraduate electrical engineering courses, as well as in the first-year “Exploring Engineering” course that includes students from engineering and the liberal arts and sciences. This paper describes some particular student-chosen design projects in the -. areas of digital audio and speech processing, telephone tone detection, electrocardiograph processing, I communicant ion systems, and control systems.

fiii’ } 1996 ASEE Annual Conference Proceedings ‘.,*,Ully’,$

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Kozick, R. J. (1996, June), Undergraduate Design Projects In A Laboratory For Real Time Signal Processing And Control Paper presented at 1996 Annual Conference, Washington, District of Columbia. 10.18260/1-2--6357