EE2073 Project Manual - EE2073 INTRODUCTION TO EEE DESIGN...

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1EE2073INTRODUCTION TO EEEDESIGN AND PROJECTPROJECT MANUALSchool of Electrical and Electronic Engineering
2Project Title: Automatic Volume Control for AudioAmplifier System1.IntroductionThis project illustrates the use of the various principles covered in this course forsolving practical electrical/electronic system design and implementation problems.The objective is to design and develop an automatic volume controller for an audioamplifier system. It is a practical example of the digital control system based on theuse of data acquisition (DAQ) modules and the LabVIEW software developmentplatform for implementing a discrete-time, sampled-data system. The physical processfor the controller is the audio amplifier system with Volume Unit (VU) meter asoutput level sensor and front-end Voltage Controlled Amplifier (VCA) stage as gaincontrol block (the actuator) followed by a Power Amplifier (PA) stage. Students willgain experience in modeling the physical process and the feedback control system,designing the audio amplifier system and the sensor/actuator interfacing electronics,power supplies, etc. The system block diagram is shown in the following figure:2.The System Design and Development ProcessAll projects, regardless of their levels of complexity, generally follow a well-defineddesign and development process characterized by the following project stages(phases) and milestones (for project reviews):VCAVolume Unit (VU) Meter(Sensor)PC PlatformDAQ modulesLabVIEWPhysical ProcessControllerModelSet PointVoltage Controlled Amplifier (VCA)Control Interface(Actuator)Automatic Volume Control for Audio Amplifier SystemController ParametersPA
3i.Explore strategies to solve application problem (Requirement/StrategyReview)ii.Propose and evaluate design options (Preliminary Design Review)iii.Design, test and build subsystems (Design Review)iv.Integrate subsystems into working system (Critical Design Review)v.Test and evaluate system performance (Project Readiness Review)3.Project OverviewAs an automatic volume controller for an audio amplifier system, the objective is todesign a controller that automatically adjusts the gain of the audio amplifier system soas to give a constant audio output at the preset level for a dynamically changing inputaudio signal. Since the loudness of the audio volume is eventually perceived by thereasonably adaptive human ear, very tight or fast control of the audio volume is notthe primary requirement and hence controller designs using fairly simple controlalgorithms are applicable.The project is to be designed and implemented as a digital control system (a discrete-time, sampled-data system) based on the use of data acquisition hardware modulesand the PC-based LabVIEW graphical programming environment. The VCA, PA andVU Meter subsystems of the audio amplifier system are to be designed, fabricated,integrated and tested. Data acquisition is used as the basis for the design, development

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Term
Spring
Professor
NoProfessor
Tags
Amplifier, Operational Amplifier, power supply, Electronic amplifier

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