Design tool

About: Design tool is a research topic. Over the lifetime, 3864 publications have been published within this topic receiving 46401 citations.

Interactive graphical pin assignment

Abstract: A design tool provides interactive graphical pin assignment. In one embodiment, the design tool identifies layout restrictions of a configurable processing device that includes a plurality of pins. The design tool further provides an interactive visual representation of a pin assignment that accommodates the layout restrictions and a user input.

Implementing speech recognition in virtual reality

Abstract: Virtual Reality (VR) is becoming an important tool in the engineering product development process. The virtual environment provides the user with the ability to interact with three-dimensional digital representations of products using natural head and hand motions. While interacting with digital objects in VR seems natural, the use of traditional twodimensional menu systems does not always provide a convenient interface to controlling task specifications in the three-dimensional space. New human-computer-interfaces are needed for this emerging VR design tool. This paper will present the details of implementing a speaker-independent, command and control, speech recognition menuing system for a virtual reality application. The menuing system will be described as it is incorporated into a virtual environment for the design of spatial mechanisms. Design and technical issues involved in the interface creation process are discussed and the resulting interaction system is described.

Nonlinear damping in vehicle lateral control: theory and experiment

Abstract: The sensor and actuator limits in real-world control systems imposes unavoidable tradeoffs between performance and the size of the operating region. When linear control design techniques are used, these limits are either neglected or accounted for by lowering the gains of the controller. The former results in severe reduction of the operating region, while the latter yields low performance. These tradeoffs can often be mitigated by using a nonlinear control strategy, in which nonlinear terms are intentionally introduced in order to implement different design objectives in different operating regions. In this paper, nonlinear damping is utilized as a design tool in lateral control of automated vehicles. Design considerations of the vehicle lateral controller include lateral tracking errors, passenger ride quality and reference/sensing system characteristics. It is shown that the intentionally introduced nonlinear damping term in the feedback loop possesses several favorable design features in the lateral control system. Experimental results using a full scale automated vehicle show that passenger comfort can be enhanced for small errors by significantly reducing the original controller gains, while at the same time achieving the same level of maximum lateral tracking errors.

Tools for the Conceptual Design and Engineering Analysis of Micro Air Vehicles

Abstract: : Micro Air Vehicles (MAV) are a subset of Unmanned Aircraft (UAS) that are up to two orders of magnitude smaller than manned systems. Near-Earth environments, such as forests, caves, tunnels and urban structures make reconnaissance, surveillance and search-and-rescue missions difficult and dangerous to accomplish. Therefore, MAVs are considered ideal for these types of missions. However, the data using full size aircraft is inadequate to characterize miniature aircraft parameters due to the lower Reynolds numbers and low aspect ratio (LAR) wings and impact of wing-propeller interactions. The main objectives of this research were to: collect and synthesize the available data/tools; create a statistically integrated database/tool set of MAV designs for conceptual design trades; validate the tool set using published experimental data; synthesize and model a prototype design using conceptual and empirical analysis; highlight MAV-specific design criteria and identify gaps in existing data for later research. The following design tools have constituted the starting point for creating a demonstration tool-set for MAV design: Digital DATCOM (aerodynamics), Athena Vortex Lattice (AVL) (stability and control), QPROP (propeller, motor, and energy requirement), MATLAB (various applications), Microsoft Excel (power/battery modeling) and Phoenix Integration ModelCenter (MC) as the executive control program (integration, sizing and trade studies). Validation cases were completed for the current level of the single-prop, fixed-wing design tool. A coaxial MAV prototype was evaluated and some parametric studies were conducted for QPROP performance.

Generating ECAD Framework Code from Abstract Models

Abstract: This paper describes a novel approach for generating the code of ECAD frameworks automatically from abstract models. Instead of providing the framework components of a design system in the form of a code library, we favor to use such a 'library' at modeling level. The framework components, common to all design tools, are described by easily understandable base models. For each design tool, the base models will be customized individually to meet the tool-specific requirements. Then, the customized models are input to a code generator that automatically generates tool specific, optimized source code. A generic modeling system and several code generators are implemented in a software generation environment called MOOSE.