Mechatronic Systems ME 430
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This 14 page Class Notes was uploaded by Halie Berge on Monday October 19, 2015. The Class Notes belongs to ME 430 at Rose-Hulman Institute of Technology taught by Matthew Boutell in Fall. Since its upload, it has received 55 views. For similar materials see /class/225093/me-430-rose-hulman-institute-of-technology in Mechanical Engineering at Rose-Hulman Institute of Technology.
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Date Created: 10/19/15
ME 430 Mechatronic Systems Introduction to Mechatronics What is Mechatronics From the RoseHulman catalog quotApplications of microprocessors and microcontrollers and digital electronics to the design and utilization of embedded control systems in smart systems and products Topics include Boolean logic and algebra system hardware and software development and interfacing for mechanical applicationsquot A more general de nition is stated as quotMechatronics is an approach to engineering and engineering design which integrates mechanical electrical and electronic and software engineering together with information technology within a wide range of products and processes quot Personally I always like to see Wikipedia s thoughts on definitions You ll have to go there to get the latest and greatest http enwikipedia orgwikiMechatronic s Why is mechatronics important quotClassically trained mechanical engineers will run the risk of being left out of the interesting wor quot carried on by multidisciplinary product design teams according to John F Elter vice president of strategic program at Xerox Corp in Webster NY quotAt Xerox we need designers who understand the control theory well enough to synthesize a better design The people will have much more of chance to leadquot Elter added that quotthe mechanical engineers who know some computer science are far more valuable than the computer scientist who know some mechanical engineering The mechanical engineers have a better feel for the overall system and do a better job making the crucial tradeoffs One possibility is that the mechatronics practitioner will prototype the whole design then the specialist in the various disciplines will take over the detail designquot Mechatronics a truly multidisciplinary approach to engineering has become a key to many different products and processes Modern systems have reached a level of sophistication which would have been hard to imagine using traditional methods The integration of mechanics electronics control and computing exploits and exceeds the relative advantages of single disciplines and when they are integrated the synergy ensures that performances reach unprecedented levels The importance of Mechatronic Engineering will further increase due to consumer demands Thus it has a vital role to play in the new millennium Conference in Atlanta Georgia in September 2000 Examples of mechatronic design Example 1 Household thermostat Then In the past thermostats have been built using mechanical temperature sensing and switching A bimetallic coil would rotate due to temperature changing the level ofa mercury switch Now Many modern day thermostats are largely electronic They have pushbutton setting and may be programmed to adjust temperature at different setting during the day or night Room temperature is sensed by a thermistor control is handled by a microprocessor and transistors are used forthe switching Example 2 Clothes dryer control Then For years clothes dryers had been controlled by a mechanical timer which had been used to turn mechanical switches off and on purely based on run time The user manually sets the timer to run for a length of time that they think is enough to complete the drying of the clothes If set to too short a time the clothes end up still damp if set to too long a time the clothes come out crispy Now Many new improved driers have done away with the mechanical timer controls There is now push button or switch control and setting Driers also have features that allows the user to set the clothes dryer to measure the moisture content It runs until the humidity is brought down to some given level at which time it stops and beeps to let the user know the load is done Additionally if the user doesn39t take out the clothes within a given period of time the machine periodically runs a few cycles to tn to keep the clothes fluffed to avoid development of wrinkles This clearly has seemingly quotintelligentquot behavior How do you create a quotsmart machinequot to not only complete timed events but to also incorporate feedback and sensing to determine how well a job has been done This requires advanced electronics most easily implemented with microprocessor control sensor input and actuators to implement an action Putting these types of features together to handle mechanical processes is what mechatronics is all about In order for you a mechanical engineer to do well in this concurrent design process across a variety of areas you need a wide knowledge background What background are you already expected to have From E8205 Modeling of thermo fluid electrical and mech systems Time and Frequency Response characteristics Characteristic of 0th 15quot and 2nOI order systems Fou erse es Use of transfer functions Model simulation using Simulink From E8203 and ECE207 Basic electrical circuits and circuit analysis Working with transistors and diodes OpAmps circuits and construction Working with sensors such as strain gages thermocouples accelerometers DC motors ME123 and ME323 Development of flow charts and pseudocode Computer programming in Matlab C or Fortran Use of Simulink ME311 and ME421 Hands on experience with instruments Measurement techniques Characteristics of measured quantities Types of available measurement sensors If you39ve already had ME406 Control systems Steady state error System stability Root locus method Controller selection What you may not have a background in Digital Logic Assembly language Programming Microprocessors Handling O Working with actuators So what is the point I39m trying to get at The vast amount of material covered in this course is going to be focused on developing your background on the use of microprocessors and microcontrollers How do you work with digital logic How do you communicate with microcontrollers How do you program microprocessors How do you make microcontrollers interact with sensors and actuators How do you manipulate or condition the interaction to achieve desirable control characteristics of a system PIC microcontrollers You will also be taught how to program and burn your own onechip controllers using PIC microcontrollers These microprocessor chips provide an inexpensive control device you can use in many different smart con rol applications If you need to imbed intelligent control in your senior design project its not improbable that you migh choose to do so with one of these microprocessors MICFIOCHIP PLCs You will also be given some hands on background working with PLCs programmable logic controllers and ladder logic You are more likely to work with this type of device in industrial settings During the quarter you will be expected to complete a project where you 1 sense the environment 2 program the control to make choices based on input 3 activate something that interacts with the environment Some of the proiects from previous quarters Duck Hunt with the real gun Shooting range using PICS There are lots and lots of previous projects and pictures of projects go look at some of them The link to the pictures are on course website There should be a link on the courseware page
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