Design and Verification of a New Computer Controlled Seating Buck

2006 ◽  
Author(s):  
Nanxin Wang ◽  
Vijitha Kiridena ◽  
Gianna Gomez-Levi ◽  
Jian Wan ◽  
Steven Sieczka ◽  
...  
Keyword(s):  
Design Process ◽  
Cycle Time ◽  
Dimensional Accuracy ◽  
Vehicle Design ◽  
Functional Requirements ◽  
Package Design ◽  
Design Concepts ◽  
Design Cycle ◽  
Computer Controlled ◽  
High Level

Appraising vehicle package design concepts using seating bucks — physical prototypes representing vehicle package, is an integral part of the vehicle package design process. Building such bucks is costly and may impose substantial burden on the vehicle design cycle time. Further, static seating bucks lack the flexibility to accommodate design iterations during the gradual progression of a vehicle program. A “Computer controlled seating buck”, as described in this paper, is a quick and inexpensive alternative to the traditional seating bucks with the desired degree of fidelity. It is particularly useful to perform package and ergonomic studies in the early stages of a vehicle program, long before the data is available to build a traditional seating buck. Such a seating buck has been developed to accommodate Ford vehicle package design needs. This paper presents the functional requirements, the high level conceptual design of how these requirements are realized, and the methods to verify, improve and sustain the dimensional accuracy and capability of the new computer controlled seating buck.

scholarly journals Design of a Catheter-Based Device for Performing Percutaneous Chordal-Cutting Procedures

2009 ◽  
Vol 3 (2) ◽  
Author(s):  
A. H. Slocum ◽  
W. R. Bosworth ◽  
A. Mazumdar ◽  
M. A. Saez ◽  
M. L. Culpepper ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Design Process ◽  
Heart Surgery ◽  
Open Heart Surgery ◽  
Mitral Valve Regurgitation ◽  
The United States ◽  
Functional Requirements ◽  
Device Design ◽  
Design Concepts ◽  
Rapid Design

In this paper we detail the rapid design, fabrication and testing of a percutaneous catheterbased device that is envisioned to enable externally controlled manipulation and cutting of specific chordae tendinae within the heart. The importance of this work is that it (a) provides a means that surgeons may use to alleviate problems associated with some forms of mitral valve regurgitation and (b) demonstrates how a deterministic design process may be used to drive design innovation in medical devices while lowering development cost/time/resources. In the United States alone, approximately 500,000 people develop ischemic or functional MR per year. A chordal cutting procedure and device could allow many patients, who would otherwise be unable to survive open-heart surgery, to undergo a potentially life-saving operation at reduced risk. The design process has enabled us to generate a solution to this problem in a relatively short time. A deterministic design process was used to generate several design concepts and then evaluate and compare each concept based on a set of functional requirements. A final concept to be alpha prototyped was then chosen, optimized, and fabricated. The design process made it possible to make rapid progress during the project and to achieve a device design that worked the first time. This approach is important to medical device design as it reduces engineering effort, cost, and the amount of time spent in iterative design cycles. An overview of the design process will be presented and discussed within the context of a specific case study–the rapid design/fabrication of a chordal cutting device. Experimental results will be used to assess: (i) The performance of the catheter in maneuvering into the heart and grasping various structures. (ii) The effectiveness of the catheter's RF ablation tip at cutting chordae inside of a heart. In the first experiment, the catheter was guided to the basal chordae under direct visualization, which showed that the catheter is capable of successfully grasping a chord. During the second experiment, ultrasound was shown to be a viable method of visualizing the catheter within the heart. During this experiment, once contact between the chord and RF ablator tip was confirmed, the chord was successfully ablated. We will also discuss experiments that are currently underway to visualize the catheter utilizing a Trans-Esophageal Echo probe, as well as imaging the mitral valve from the apex of the heart with a laparoscope so that video of the basal chord being grasped and cut can be acquired on a heart whose anatomical structures are intact. A brief synopsis will then be given of how the design process has been used in research and educational collaborations between MIT and local hospitals.

Development and Application of Design Concept Ontologies for Contextual Conceptualization

1998 ◽  
Author(s):  
Imre Horváth ◽  
Joris S. M. Vergeest ◽  
György Kuczogi
Keyword(s):  
Computer Aided Design ◽  
Design Solution ◽  
Functional Design ◽  
Functional Requirements ◽  
Human Beings ◽  
Design Concepts ◽  
High Level Modeling ◽  
Knowledge Intensive ◽  
High Level ◽  
Very High

Abstract This study focuses on two specific problems of knowledge intensive computer aided design: (a) how can design concepts be modeled and represented in a form that is understandable for human beings and can be processed by computers, (b) how can they be arranged in structures that enables a computer-based functional design of products. First, a methodology for definition of very high level modeling entities based on the ontology theory is presented. It formalizes design concepts in terms of all concerned entities, phenomena and situations and describes them by attributes, parameters and descriptors, respectively. Validity and interactions of design concepts are governed by constraints. The very high level modeling entities are arranged into domain oriented design ontologies based on their contents and semantic relationships. The formalism used for logical specification of design ontologies is based on a library of declarative expressions called ACN-Code. A design ontology lends itself to a specific knowledge base called associative concept network (ACN). The inference engine that works on an application oriented ACN selects the appropriate design concepts against a set of user specified functional requirements. Due to the pre-defined associations incomplete functional specifications can be completed to result in a fully functional design solution. The paper also presents an application example.

Concurrent Design and Analysis of Mechanisms

1991 ◽  
Author(s):  
Michael G. Hollars ◽  
Dan E. Rosenthal
Keyword(s):  
Mechanism Design ◽  
Design Process ◽  
Cycle Time ◽  
Concurrent Design ◽  
Analysis Software ◽  
Seamless Integration ◽  
Analysis And Design ◽  
Graphical Interfaces ◽  
Design Cycle ◽  
Cad Cam

Abstract Concurrent design and analysis of mechanisms offer significant improvements in product quality while greatly reducing design cycle time. Recent advances in CAE software now give very powerful analysis and design capability directly to the design engineer. The key advances are intuitive graphical interfaces, adapation of analysis software to the design process, and seamless integration with existing CAD/CAM/CAE products. Several examples of concurrent mechanism design and analysis are given along with an overview of CAE mechanism design and analysis software, including Applied Motion® from Rasna Corporation.

An Enhanced Axiomatic Design Process

1998 ◽  
Author(s):  
Hongqian Yu ◽  
Lily H. Shu ◽  
Ron Venter
Keyword(s):  
Design Process ◽  
Axiomatic Design ◽  
Design Matrix ◽  
Basic Design ◽  
House Of Quality ◽  
Functional Requirements ◽  
Customer Needs ◽  
Design Concepts ◽  
Quality Design

Abstract This paper describes an Axiomatic Design process enhanced by the House of Quality that combines the advantages of these two methods: 1) the House of Quality is used to translate customer needs into engineering specifications; 2) decomposition by theme is used to determine the Basic Functional Requirements; 3) engineering specifications are categorized into strategies, constraints, Quality Functional Requirements and possible Basic Functional Requirements; 4) Quality Functional Requirements are assigned to different Basic Functional Requirements; 5) Basic Design Matrix, Single Quality Design Matrix and Cross Quality Design Matrix are generated to study and evaluate design concepts from different aspects. By using this approach, it is possible that an improved understanding and higher efficiency of the design process may be achieved.

Design for Skin and Shape: An Innovative Design Approach

2015 ◽  
Vol 809-810 ◽  
pp. 1311-1316 ◽  
Author(s):  
Panagiotis Kyratsis ◽  
Nikolaos Efkolidis ◽  
Athanasios Manavis ◽  
Apostolos Tsagaris
Keyword(s):  
Product Design ◽  
Design Process ◽  
Development Time ◽  
Specific Aspect ◽  
Design Approach ◽  
Innovative Design ◽  
Package Design ◽  
Design For X ◽  
Design Cycle

Although all aspects of a product design are demanding and need several resources to be completed, Design for X (DfX) represents a series of formal methodologies used to optimize a specific aspect of the product design under consideration. Those DfX tools deal with different stages of the product design and there is considerable gap concerning the package design cycle. The proposed methodology Design for Skin and Shape (DfS&S) is focused on the package design industry and offers significant advantage towards its success. It helps the designers to be focused on shapes that are easily recognized by the customers and then create appropriate graphics for them. Following this approach, it is easier to create an innovative optical identity for the product and its packaging during the conceptual stage. The methodology can reduce the development time of the package, while designers have in mind, from the beginning of the design process, the shape which will guide them to its completion. Following the proposed methodology different packaging designs are presented.

A Model-Based and Simulation Driven Design Approach for Haptic Devices

2013 ◽  
Author(s):  
Aftab Ahmad ◽  
Kjell Andersson ◽  
Ulf Sellgren
Keyword(s):  
Design Process ◽  
Design Space Exploration ◽  
Dynamic Stiffness ◽  
Haptic Device ◽  
Test Case ◽  
Functional Requirements ◽  
Haptic Devices ◽  
Design Concepts ◽  
Model Based ◽  
Concept Evaluation

The output from a design process of high precision and reliable haptic devices for surgical training like bones and teeth is a complex design. The complexity is largely due to the multi-criteria and conflicting character of the functional requirements. These requirements include high stiffness, large workspace, high manipulability, small inertia, low friction, and high transparency. The requirements are a basis for generating design concepts. The concept evaluation relies to a large extent on a systematic usage of kinematic, dynamic, stiffness, and friction models. The design process can benefit from a model-based and simulation driven approach, where one starts from an abstract top-level model that is extended via stepwise refinements and design space exploration into a complete realization of the system. Such an approach is presented and evaluated through a test case where a haptic device, based on a Stewart platform, has been designed and realized. It can be concluded, based on simulation and experimental results that the performance of this optimally designed haptic device satisfies the stated user requirements. This indicates that the methodology can support the development of an optimal haptic device. However, more test cases are needed to further verify the presented methodology.

Reducing Cycle Time and Errors in the Design and Layout of MEMS

2003 ◽  
Author(s):  
Michael S. Cherry ◽  
Gregory M. Roach ◽  
Jonathan W. Wittwer ◽  
Larry L. Howell ◽  
Jordan J. Cox
Keyword(s):  
Design Process ◽  
Cycle Time ◽  
Design Methodology ◽  
Parametric Design ◽  
Design Procedure ◽  
Technical Document ◽  
Test Procedures ◽  
Design Models ◽  
Design Cycle ◽  
Finite Set

A design methodology is presented which decreases cycle time and opportunities for error through automated execution of a consistent design procedure. The Product Design Generator (PDG) methodology is useful for existing devices with a well-established design process. Two such examples are given, the Thermomechanical In-plane Microactuator (TIM) and the micro force gauge. In both PDGs, the designer inputs a finite set of requirements which automatically updates parametric design models. The necessary analyses are then executed, and product artifacts such as a CAD file, technical document, and test procedures are generated. The application of this method reduces the opportunities for error by ten times for the TIM PDG and five times for the micro force gauge PDG. The design cycle time is reduced from hours to minutes for both devices.

Experience Design Applied to Research

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Andrea CAPRA ◽  
Ana BERGER ◽  
Daniela SZABLUK ◽  
Manuela OLIVEIRA
Keyword(s):  
Information Technology ◽  
Product Development ◽  
Design Process ◽  
Development Process ◽  
Product Development Process ◽  
Experience Design ◽  
Low Resolution ◽  
Design Concepts ◽  
Innovative Products ◽  
Technological Products

An accurate understanding of users' needs is essential for the development of innovative products. This article presents an exploratory method of user centered research in the context of the design process of technological products, conceived from the demands of a large information technology company. The method is oriented - but not restricted - to the initial stages of the product development process, and uses low-resolution prototypes and simulations of interactions, allowing users to imagine themselves in a future context through fictitious environments and scenarios in the ambit of ideation. The method is effective in identifying the requirements of the experience related to the product’s usage and allows rapid iteration on existing assumptions and greater exploration of design concepts that emerge throughout the investigation.

LADA Synchronization for Symmetric and Asymmetric ATE Test Program Cycles

2019 ◽  
Author(s):  
Arun Kumar Karunanithi ◽  
Joseph Caroselli ◽  
Jason Christensen ◽  
Michell Espitia
Keyword(s):  
Cycle Time ◽  
Dwell Time ◽  
Turnaround Time ◽  
Test Program ◽  
Area Of Interest ◽  
Marginal State ◽  
Structural Failures ◽  
Major Factors ◽  
High Level ◽  
Program Cycle

Abstract Laser Assisted Device Alteration (LADA) or Soft Defect Localization (SDL) is commonly used to root cause device marginality due to functional or structural failures. At a high level, LADA involves setting the device under test (DUT) at its marginal state and using focused near infra-red laser beams to perturb sensitive circuitry [1]. Scanning the focused laser beam over the die can be a long and time-consuming process. In this paper, two LADA cases are presented, which involve a parametric measurement failure while running a dynamic ATE test. Using LADA technique, these two cases were root caused. These two cases also explain how a parametric measurement-based LADA can be setup on ATE, as well as a synchronization method independent of vectors in a pattern. Synchronization was necessitated in the 2nd case due to the asymmetric test program loop, as well as the long test program cycle time. There are many factors which impact LADA turnaround time and it can take anywhere between few seconds to one day. The two major factors are the size of the Area of Interest (AOI) and test program cycle time. Test program cycle time influences the laser “dwell time” for LADA. Dwell time, in simple terms, is the total time the laser is parked at each pixel. The laser can also be synchronized with the test program cycle, keeping the two always in phase. This is explained in Case 2, where LADA synchronization was implemented, and the analysis was successfully completed in time, even though the test cycle time was very long.

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