MCT 317: Design of Mechatronics Systems (1) Lecture 02 PDF

MCT 317: Design of Mechatronics Systems (1) Lecture 02: Mechatronics product Design Techniques and Methodology Mohammed Ibrahim Dr. Eng. Mohamed Nabil Assistant Professor- Mechatronics Department 7/16/2...

MCT 317: Design of Mechatronics Systems (1) Lecture 02: Mechatronics product Design Techniques and Methodology Mohammed Ibrahim Dr. Eng. Mohamed Nabil Assistant Professor- Mechatronics Department 7/16/2018 [email protected] 1 Product development life cycle  Mechatronics Design Process  A major factor in the sequential approach (traditional) is the inherently complex nature of designing a multidisciplinary system. Essentially, mechatronics is an improvement upon existing lengthy and expensive design processes.  The mechatronic design process consists of three phases:  modeling and simulation,  prototyping,  and deployment. Mechatronics Design Process Example on Identify Problem & Need Example  Need: Drivers have difficulty seeing obstructions in all directions  Objective: design system to avoid accidents 5 Example Needs Hierarchy 6  Requirements Specification  Identifies requirements design must satisfy for success 1. Marketing requirements  Customer needs 2. Engineering requirements  Applies to technical aspects  Performance requirements 7 Product Design Specifications Customer Needs For Rope Climber  Climbs fast  Affordable as a birthday present  Fully assembled  Uses batteries for power  It is safe  Looks good  Plays music as it climbs  Glows in the dark  Last a long time Product Design Specifications Engineering Specs  Climbs at 1 ft/s or faster  Retail cost is to be less than $30  Uses 2 AA batteries (not included)  Has no removable small parts  Music loudness between 20-30 db  Luminosity is to be more than 5 W  Works for more than 3 hours on 2 AA Product Design Constraints and Requirements  DesignEngineers must consider a multitude of technical, economic, social, environmental, and political constraints when they design products and processes.  Theremust be clear evidence in your design project that you have addressed the constraints that are relevant to your project.  Functional Constraints Overall Geometry – size, width, space, arrangement Motion of parts – type, direction, velocities, acceleration, kinematics Forces involved – load direction, magnitude, load, impact Energy needed – heating, cooling, conversion, pressure Materials to be used – flow, transport, properties Control system – electrical, hydraulic, mechanical, pneumatic Information flow – inputs, outputs, form, display  Safety Constraints Operational – direct, indirect, hazard elimination Human – warnings, training Environmental – land, sea, air, noise, light, radiation, reaction, transport  Manufacturing Constraints Production of components – factory limitations, means of production, wastes Purchase of components – supplier quality, reliability, quality control, inspection Assembly – installation, foundations, bolting, welding Transport – material handling, clearance, packaging  Methods for the Development of Mechatronic systems  Introductory Task  What are the process for developing a new washing machine?  1- Pre-Study Process  Basics and Analysis: What is it all about?  Developing a washing machine which uses a technique similar to hand washing. A product like this would be more efficient and ecological and would operate on lower costs.  Study of Product, Customer and Market  Product: A washing machine with this technology has the potential to be faster, more ecological and more cost-efficient.  Market: In a first step, the target market is Europe, Northern America and Japan, households in well-developed countries.  Customer: In the beginning, the target group will consist of people with average (or high) income and a sense for cost-efficiency and ecology. 2- Requirement List 3- Functional Structure 4- Finding solutions for each function  Solutions for each function trough creativity methods  Brainstorming  Generate many ideas  Evaluate against PDS (product design specifications)  Select one to engineer  Filtering the solutions  Ask the following questions for every solution:  Does the solution satisfy all the requirements of the requirement list?  Is there a solution which is really similar or even the same? Condense them to one solution.  If there are more than 6 solutions left for one function:  Evaluate the worst and get rid of it. 5- Evaluating the best solution 6- Layout Process Questions ?? 33