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Note for Mechatronics - Mech By Namachivayam S

  • Mechatronics - Mech
  • Note
  • Mohamed Sathak AJ College of Engineering - MSAJCE
  • Electronics and Communication Engineering
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Namachivayam S
Namachivayam S
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Prepared by Namachivayam S Asst Prof ME6702 - Mechtronics Unit I Notes What is “Mechatronics”? Mechatronics is a concept of Japanese origin (1970’s) and can be defined as the application of electronics and computer technology to control the motions of mechanical systems (figure 1.1.1). It is a multidisciplinary approach to product and manufacturing system design (Figure 1.1.2). It involves application of electrical, mechanical, control and computer engineering to develop products, processes and systems with greater flexibility, ease in redesign and ability of reprogramming. It concurrently includes all these disciplines. Department of ECE Page 1

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Prepared by Namachivayam S Asst Prof Mechatronics can also be termed as replacement of mechanics with electronics or enhance mechanics with electronics. For example, in modern automobiles, mechanical fuel injection systems are now replaced with electronic fuel injection systems. This replacement made the automobiles more efficient and less pollutant. With the help of microelectronics and sensor technology, Mechatronics systems are providing high levels of precision and reliability. It is now possible to move (in x – y plane) the work table of a modern production machine tool in a step of 0.0001 mm. By employment of reprogrammable microcontrollers/microcomputers, it is now easy to add new functions and capabilities to a product or a system. Today’s domestic washing machines are “intelligent” and four-wheel passenger automobiles are equipped with safety installations such as air-bags, parking (proximity) sensors, antitheft electronic keys etc. Basic Elements of Mechatronics system Department of ECE Page 2

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Prepared by Namachivayam S Asst Prof The basic elements of Mechatronics system are 1. 2. 3. 4. 5. 6. Input signal Controller Mechanical system Sensor Microcontroller Output Importance of Mechatronics in automation Today’s customers are demanding more variety and higher levels of flexibility in the products. Due to these demands and competition in the market, manufacturers are thriving to launch new/modified products to survive. It is reducing the product life as well as lead-time to manufacture a product. It is therefore essential to automate the manufacturing and assembly operations of a product. There are various activities involved in the product manufacturing process. These are shown in figure 1.1.3. These activities can be classified into two groups viz. design and manufacturing activities Department of ECE Page 3

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Prepared by Namachivayam S Asst Prof Mechatronics concurrently employs the disciplines of mechanical, electrical, control and computer engineering at the stage of design itself. Mechanical discipline is employed in terms of various machines and mechanisms, where as electrical engineering as various electric prime movers viz. AC/DC, servo motors and other systems is used. Control engineering helps in the development of various electronics based control systems to enhance or replace the mechanics of the mechanical systems. Computers are widely used to write various softwares to control the control systems; product design and development activities; materials and manufacturing resource planning, record keeping, market survey, and other sales related activities. Using computer aided design (CAD) / computer aided analysis (CAE) tools, three dimensional models of products can easily be developed. These models can then be analyzed and can be simulated to study their performances using numerical tools. These numerical tools are being continuously updated or enriched with the real-life performances of the similar kind of products. These exercises provide an approximate idea about performance of the product/system to the design team at the early stage of the product development. Based on the simulation studies, the designs can be modified to achieve better performances. During the conventional design manufacturing process, the design assessment is generally carried out after the production of first lot of the products. This consumes a lot of time, which leads to longer (in months/years) product development lead-time. Use Department of ECE Page 4

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