Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 115 for “"Robust design"”.
-
The robust design of complex systems
Robust Engineering Design has evolved as an important methodology for the integration of quality with the process of design. The methodology encompasses the disciplines of experimental design, model building and optimization. First an experiment is conducted on a system (or a simulation of the …
-
Comparative analysis of robust design methods
Robust parameter design is an engineering methodology intended as a cost effective approach to improve the quality of products, processes and systems. Control factors are those system parameters that can be easily controlled and manipulated. Noise factors are those system parameters that are …
-
Robust design methodologies: application to compressor blades
Compressor blades are subtle aerodynamic shapes designed after years of research and insight. They inevitably show deviations from their desired shapes due to manufacturing errors, erosion or foreign object damage. In the present study we focus on seeking compressor blade geometries, that are …
-
Reachability and robust design in dynamic systems
… The problems of forward reachability and robust design provide information about a dynamic system when uncertainty is present. This thesis develops theory and numerical methods for approaching the problems of reachability and robust design applied to dynamic systems. The main assumption is …
-
Robust design and tolerancing of compressor blades
… variability on turbomachinery performance and designing blade geometries whose performance is robust to this variability. Relatively little work has been done to specify the appropriate level of variability by designing the manufacturing tolerances. This thesis presents new approaches for …
-
Robust design via geometric and signomial programming
… successful in optimizing multidisciplinary designs due to exploiting the speed of convergence and the ability to model non-linear designs. However, an optimal solution of GPs and SPs can be sensitive to uncertainties in the parameters involved in the problem. In fact, robust optimization can …
-
Gaussian Quadrature for computer aided robust design
Computer aided design has allowed many design decisions to be made before hardware is built through "virtual" prototypes: computer simulations of an engineering design. To produce robust systems noise factors must also be considered (robust design), and should they should be considered as early as …
-
Efficient and robust design optimization of transonic airfoils
… procedures have been employed for the design of airfoils in transonic flow based on the transonic small-disturbance (TSD) and Euler equations. A sequential approximation optimization technique was implemented for solving the design problem of lift maximization with wave drag and area …
-
Stochastic Methods for Robust Design of Launch Vehicle Structures
… in a variety of analytical and empirical design procedures to account for the diminished buckling loads of such shells. Some notable design guidelines which were formulated in the 1960s and are currently being used are the NASA-SP 8007 for imperfection sensitive cylinders and the NASA-SP …
-
Robust design optimization with dynamic constraints using numerical continuation
This thesis develops a framework for performing robust design optimization of objective functions constrained by differential, algebraic, and integral constraints. A successive parameter continuation method combined with polynomial chaos expansions is used to locate stationary points. The use of …
-
Statistical Surrogate Models for Robust Design Optimisation in Reduced Dimension
… is crucial for multi-query problems such as design optimisation. However, the design of these products depends on complex and often deterministic computational models that may be expensive-to-evaluate. Consequently, it is expedient to consider these models as black-box functions, such that …
-
A quadrature-based technique for robust design with computer simulations
… for estimating transmitted variance to enable robust parameter design in computer simulations. This method is based on the Hermite-Gaussian quadrature for a single input. It is extended to multiple variables, in which case, for simulations with n randomly varying inputs, the method requires 4n …
-
A robust design method for impedance control of constrained dynamic systems
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.
-
Improving the manufacturing yield of investment cast turbine blades through robust design
… casting foundries by aerospace companies that design and build jet engines. Aerospace companies have found that casting defects are an important cost driver in the price that they pay the foundries for the turbine blades. Defect types include porosity, stress, grain, fill, and mold-related …
-
A Novel Approach to Robust Design Using Recent Advances in Robust and Multiobjective Optimization Methods
Current advances in the fi eld of Robust Optimization (RO) from such authors as Azarm, Ben-Tal, Elishakoff , Zhang, Renaud and others have led to new and interesting approaches to the treatment of uncertainty in traditional engineering problems. This paper presents the Budget of Uncertainty (BoU) …
-
Buffer optimization and robust design studies in asynchronous assembly systems using design of experiments approach
… on the buffer specification problem of the design of asynchronous assembly systems (AAS). The objectives of the research are to determine an optimal area of buffers and to design AAS that are robust to noise factors. In order to determine an optimal area of buffers in which the throughput …
-
Assessing colonization and extirpation trends of Illinois understory herbaceous plants using robust-design occupancy models
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01
-
A comparison of the response model/combined array method and the traditional methods for robust design
… of considering variation as well as target when designing experiments. The Box-Taguchi method ( a variation of his classical method) has placed little emphasis on C-N interactions. In this study, an attempt is made to understand the C-N interactions. To achieve this, simulated examples are used …
-
Robust design as a driver of engine cylinder heads evolution : a framework for identifying product improvement paths
The fundamental goal of Robust Design is to improve the quality of a product by minimizing the effects of variation. A key contributor to robustness over the long term is R&D. Therefore, a framework is desired to help managers to identify promising improvement paths that a system may undergo, thus …
Page 1 of 6