Found 1953 related files. Current in page 21
http://www.square-9.com/ | This document examines the benefits of the shift from paper-based office processes to an electronic workflow system, especially as it pertains to the healthcare industry.
Utz von Wagner, Daniel Hochlenert, Peter Hagedorn Department for Applied Mechanics, Technische Universität Darmstadt, 64289 Darmstadt, Germany Summary Considerable effort is spent in the design and testing of disk brakes of modern passenger cars. This effort can be reduced if refined mathematical-mechanical models are used for studying the dynamics of these brakes before prototypes are available. The present paper is devoted to the modeling of a floating caliper disk brake, special regard being given to the suppression of squeal. The model developed includes the brake rotor, modeled as a flexible rotating plate, housing, piston, yoke, and friction pads. In this nonlinear model all the prominent features of squeal are reproduced, such as e.g. independence of the frequency on the speed, etc. In a test rig built in Darmstadt, the model is validated. In addition, the set-up also permits active control by using ”smart pads”. Those pads, which include piezoceramic actuators are successfully used for the suppression of squeal.
The paper presents a robust feedback control method to suppress the vibration and squeal noise phenomenon in disc brake model using an active force control (AFC) strategy. A two degree-of-freedom (2-DOF) Wagner model was considered in the study as the main dynamical element to be controlled. The system was tested for robustness and effectiveness in reducing the vibration and squeal, taking into account a number of disturbances acting on the system. Three control schemes were simulated and compared involving the classic proportional-integral-derivative (PID) controller, AFC with crude approximation (AFCCA) and AFC with fuzzy logic (AFCFL) schemes. The AFC-based schemes show superior performance compared to the PID only counterpart with the AFCFL method producing the best performance. increases warranty costs. It is still rather difficult to predict its occurrence. However, disk brake systems are used more extensively in modern vehicles and have become the focus of brake squeal research -. The mechanism of disk brake squeal arise because of three reasons; alternative stick and slip motion between pad and disk, static instability due to excessive braking force, and dynamic instability arising from the friction force . The system parameters were chosen such that the inertia and elastic properties of the wobbling disk represent two orthogonal elastic eigen modes with three nodal diameters of a real disk as later experimentally investigated in -. An open loop control system is considered for detecting the squeal case . By preloading the brake, rotating the disc, extracting natural frequencies and complex eigen values, this new approach combines all in a single continuous step. The simulation results show that significant pad bending vibration may be responsible for the disc brake squeal and it can be reduced by decreasing the friction coefficient, increasing the stiffness of the disc, by...
Holden Binder provides information about affordable custom binders with massive appeal and describes laminated paper binders, entrapment and clear view binders.
Autodesk® Revit® Autodesk® Revit® Structure Autodesk® Robot™ Structural Analysis Professional Integrating Autodesk Revit, Revit Structure, and Robot Structural Analysis Professional This paper explores the interoperability between Autodesk Revit, Revit Structure, and Robot Structural Analysis Professional—including recommended workflows, analytical modeling best practices, and the details of the data exchange between the software solutions. Structural engineers typically start the design process by interpreting architectural drawings, creating design documentation, and creating various analytical models. These analytical models must be consistently coordinated with respect to general framing layout, material and section properties, and loading. Once analysis and design is complete the design documentation is modified to reflect the most current design. This workflow is repeated for each iteration of the design process. ® ® ® ® The link between Autodesk Revit 2013 or Autodesk Revit Structure 2013 software and ® Autodesk Robot™ Structural Analysis Professional 2013 software helps make this workflow smoother by facilitating the coordination of design documentation with structural analytical design information. 1 Revit software supports the Building Information Modeling (BIM) process for structural engineers by providing a physical model of the structure to use for documentation and an associated analytical model as well as other structural attributes and properties to use for structural analysis and design. Robot Structural Analysis Professional supports BIM with its advanced analysis and multi-material design functionality. The bidirectional interoperability of Revit and Robot Structural Analysis Professional software helps reduce the time needed to create and update multiple analysis models and helps to avoid 1 Autodesk Revit 2013 contains the functionality of Autodesk® Revit® Architecture 2013, Autodesk® Revit® MEP 2013, and Autodesk® Revit® Structure 2013 software, and is available in the Autodesk® Building Design Suite Premium and Ultimate editions. To limit product name repetition, the use of the name “Revit” throughout the rest of this paper refers to both Autodesk Revit and Autodesk Revit Structure.
This paper profiles best practices for implementing building information modeling (BIM) solutions, exploring the key success factors for a successful BIM deployment, the process and staffing changes that can be expected, and the requisite training needs for BIM. Key Success Factors Let’s begin by focusing on the key success factors for a successful BIM deployment and what firms can expect as they transition from 2D or object CAD systems (sometimes called single-building modelers or virtual building modelers) to a purpose-built BIM solution like Revit® Architecture software. “A New Order of Things” At the end of 2003, Autodesk commissioned an independent research study1 that looked at the process changes, benefits, and challenges being experienced by firms implementing Revit Architecture. A key finding of the research is that practically all of the participants in the study were grappling with issues of change. To supplement the study, Autodesk conducted an online survey of their Revit Architecture customers, which included questions relating to change. In the survey, 82% of the respondents noted their design process was changing as a result of using Revit Architecture, and 80% reported that their deliverables were changing as well.
http://www.square-9.com/document-management-software | Document management software solutions help businesses cut costs with reduced paper usage and improved workflow. Programs like SmartSearch from Square 9 enable a paperless office, where basic hard-cost savings are compounded with reduced need for IT staff, plus improved communication among employees, clients, and partners.
http://www.checkworks.com/ | Although electronic and credit card payments have been on the rise, paper checks still remain popular amongst many Americans due to their convenience and security.
Dissertation writing is never a new word to the writing industry. The word dissertation often seems to be a drudgery and nightmare to the students. They need to put so much effort to complete their work and at the end the result they get is much disappointing. The tutor simply rejects the dissertation paper just because of the irrelevant contents and formats. This is where we had an idea to provide a free draft to the students. And hence Dissertationcouncil.co.uk emerged as one of the leading dissertation writing services in UK with a unique feature as “free drafts”.
Although current rapid prototyping methods have had a significant impact on product and process design, they are often limited in both accuracy and choice of suitable materials. Also, the current methods share little similarity to typical manufacturing processes. In this paper, a method for using CNC machining as a Rapid Prototyping process is described in order to exploit the creation of functional prototypes in a wide array of materials. The method uses a plurality of simple 2½-D toolpaths from various orientations about an axis of rotation, in order to machine the entire surface of a part without refixturing. It is our goal to automatically create these tool paths for machining, and eliminate the complex planning traditionally associated with CNC machining. The current approach to process planning involves calculating all the necessary data from the slice information of an STL model. An overview of the CNC-RP process and the process planning methodology is presented. Keywords: Rapid Prototyping, CNC Machining, Process Planning, Toolpath Generation