This paper presents a new type of haptic device using spherical geometry. The basic idea of haptic devices is to provide users with feedback information on the motion and/or force that he or she generates. Haptic devices have several potential applications, such as for example, fine compliant assembly, VR environment simulation and high precision teleoperation, especially in hazardous or hostil...

A methodology for optimizing the design of an electrical packaging system for a high speed computer is described. The pertinent parameters are first defined and their sensitivities are derived so that the proper design trade-ofls can ultimately be made. From this procedure, a set of rules is generated for driving a computer aided design system. Finally, there is a discussion of design optimizat...

The NASA Langley MDO method evaluation study seeks to arrive at a set of guidelines for using promising MDO methods by accumulating and analyzing computational data for such methods. The data are collected by conducting a series of reproducible experiments. In the rst phase of the study, three MDO methods were implemented in the iSIGHTz framework and used to solve a set of ten relatively simple...

The primary objective of this paper is to demonstrate the use of process-based manufacturing and assembly cost models in a traditional performancefocused multidisciplinary design and optimization process. The use of automated cost-performance analysis is an enabling technology that could bring realistic process-based manufacturing and assembly cost into multidisciplinary design and optimization...

Most of the research on aggregate production planning has been focused on discrete parts manufacturing models. In environments where intermediate inventory cannot be stored, and multiple products are produced simultaneously using complex con$gurations of production machines, these models may produce erroneous results. In this paper, we present a con$guration-based formulation for one such manuf...

Roadheader performance and related parameters are reviewed and their effects on the production and advance rate are discussed. Among the parameters influencing the machine performance, the most important one is the cutterhead design which could be optimized for a specific application. The procedures and the approach used in design optimization is reviewed. A computer program which has been deve...

We develop two quality measures for the analysis and optimization of grasps and xtures. The rst metric is a measure of stability and is obtained by analyzing the eeect of small perturbations in the position of the grasped object or small disturbance forces on the grasped object. The second metric is a measure of ro-bustness to errors in the positions of the xture elements. In addition, we explo...

Optimizing the performance and availability of an IT service in the design stage are typically considered as independent tasks. However, since both aspects are related to one another, these activities could be combined by applying performability models, in which both the performance and the availability of a service can be more accurately predicted. In this paper, a design optimization problem ...

An important benefit in adopting multi-mode hybrid powertrains is the possibility of downsizing the electric motor/generator (M/G) units. This paper discusses design optimization of M/G full-load operation envelopes. A three-dimensional operation space analysis is introduced and the full-load speed-torque envelopes of M/G units appear as constraints in the powertrain operation space. The analys...

Multidisciplinary rounds (MDR) have become important mechanisms for communication and coordination of care. To guide design of tools supporting MDR, we reviewed the literature published from 1990 to 2005 about MDR on information tools used, information needs, impact of information tools, and evaluation measures. Fifty-one papers met inclusion criteria and were included. In addition to patient-c...