Industrial Design Methods Research Articles

A methodology for designing controllers for industrial systems based on nonlinear separation model and control

A feasible method of controller design for industrial nonlinear dynamic systems is proposed, by separating the nonlinear dynamic system into nonlinear static parts and a linear dynamic part. The proposed method of industrial controller design reduces the existing gaps between the control theory and the actual field. In the controller construction procedure of a system, the nonlinearities are eliminated by using the inversion functions of the nonlinear static parts. Any conventional control theory is ideally applicable to a linear dynamic part of the system. Based on the proposed method of nonlinear separation, controllers were constructed for three different systems: a chemical reactor, a temperature level-controlled tanked water system, and the contour-following control of an articulated robot arm. Some encouraging control performances, superior to those of other existing controllers, showed its significant potential for application to industrial systems with nonlinearities.

Industrial Design as a Strategic Resource A Study of Industrial Design Methods and Approaches for Companies' Strategic Development

In order to understand how design can become a strategic resource it is necessary to understand how design management is related to other management philosophies. This article aims to understand the reasoning of strategic management and analyse the design management literature and the arguments for why design contributes to strategic development. From being a linear process strategic management has developed into an organizational learning process based on dialogues. Is this development considered by theories concerning design management? Not to its full potential. The literature studies show that design management could be related to the recent management literature in which integrationis a key word. Design as a strategic resourceis based on three integration processes. These are conceptual, functional and visual integration. The empirical studies show that at companies in which all three integration processes have taken place there has also been a great deal of organizational learning. Thereis potential to relate the organizational learning perspective of strategic management also to developing a design management concept.

Hot-gas-side and coolant-side heat transfer in liquid rocket engine combustors

The objectives of this article are to develop a multidisciplinary, computational methodology to predict the hot-gas-side and coolant-side heat transfer in film cooling assisted, regeneratively cooled liquid rocket engine combustors, and to use it in parametric studies to recommend optimized design of the coolant channels for a developmental combustor. An integrated numerical model which incorporates computational fluid dynamics (CFD) for the hot-gas thermal environment, and thermal analysis for the liner and coolant channels, was developed. This integrated CFD/thermal model was validated by comparing predicted heat fluxes with those of hot-firing test and industrial design methods for a 40-k calorimeter thrust chamber and the Space Shuttle Main Engine main combustion chamber. Parametric studies were performed for the advanced main combustion chamber to find a strategy for a proposed coolant channel design.

Computer techniques for power system design analysis

A method of industrial and commercial power systems design, planning, and analysis by computer is described. The use of modular computer programs operating from a common data base is used for evaluation of connected, demand, and design load conditions; feeder and transformer size selections; voltage drop and load flow analysis; three phase bolted fault analysis; and unbalanced fault analysis. Each program module may be executed separately or modules may be executed as a group. One program module solution may be used to generate data for the following module. The program uses a design library which may be user-modified to meet individual design specifications.