Overview

The material in this book is based on the assumption that new manufacturing techniques offer potential benefits to electromechanical designers, but that appropriate design systems are necessary. The book describes a design paradigm, ""design by composition"", that facilitates design of integrated electromechanical devices for fabrication with novel rapid prototyping processes. Manufacturing techniques called layered manufacturing, rapid prototyping, or Solid Freeform Fabrication (SFF) build parts by a sequence of deposition and shaping operations. These techniques allow a greater degree of manufacturing automation, and offer new design possibilities. For example, during SFF fabrication, the interior of parts is accessible. Traditional manufacturing techniques, on the other hand, is generally of parts with complex internal geometry and embedded components. The design by composition technique is particularly well suited to design and fabrication of mechanical parts with embedded electronic, sensor, and actuator components. The highly integrated mechanisms that can be fabricated with the Shape Deposition Manufacturing (SDM) process and the design by composition approach can result in small robotic systems with increased performance and reliability. The book describes some of the new possibilities offered by SFF techniques, in particular the SDM process, and how design by composition makes these capabilities accessible to designers. It presents the concept of design by composition, as well as the theoretical development of algorithms for its implementation. A prototype implementation is described, as well as some example parts built at Stanford University with the system.

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