Architectural CAD Research Articles

Research on integration technology of architectural CAD and budget estimate

It is particularly important to integrate architectural CAD and budget integration technology in the field of modern construction project management. Faced with the increasing complexity of construction projects, the method of separating design and budget in the past is no longer suitable for the standards of efficient management. Starting from the basic concepts and core technologies of architectural CAD, this article studies the difficulties in data transmission and conversion, as well as the strong demand for integration technology throughout the entire building lifecycle. Analyzing the implementation methods of integrating architectural CAD and budget technology, including data docking, the application of BIM technology, and collaborative work modes, this article explains the positive role of this integration in enhancing the unity of design and budget, improving change response speed, and reducing costs, providing reference for the information development of the construction industry.

Intelligent Generation and Reinforcement Learning Strategy of Architectural Design CAD Models

Intelligent Generation and Reinforcement Learning Strategy of Architectural Design CAD Models

Автоматизированное проектирование расположения базовых станций беспроводной сотовой связи

The planning of wireless base stations is a multi-purpose task of optimizing combinations, and the main goals of optimization include cost reduction, increased coverage and quality preservation. The paper pays attention to the consideration of the coverage radius, the quality of signal transmission and two types of signal interference. To implement the tasks set for the location of the base station, the following algorithms were used: PMET-PSO and PPSO-GA, which became the basis for the module for solving problems of designing the location of base stations in the proposed automated design system. Using the C/S architecture and 3D CAD based on ACIS and Google Earth, based on an in-depth analysis of the actual requirements for the base station, a CAD for the location of wireless cellular base stations is proposed. The main technical modules of the system are the technology of rapid modeling involving objects in the planning of base stations, the technology of multi-purpose modeling and solving problems of planning base stations and the technology of distributed joint integration of program modules. The technology for solving planning problems uses the PMET-PSO and PPSO-GA algorithms. Both algorithms compensate for the disadvantages of their original algorithms (MET-PSO and PSO-GA) and retain their respective advantages: time - PMET-PSO, and if the user does not care about time and wants to get the optimal possible solution, then the PPSO-GA algorithm. Both algorithms combine memory computing with good parallelism, which plays a crucial role in solving multi-purpose optimization problems.

The Application of "Task-driven Approach" in Teaching Architectural CAD in Higher Education

The Application of "Task-driven Approach" in Teaching Architectural CAD in Higher Education

Curriculum Reform and Practice of Architectural Engineering: Based on Architectural CAD

Architectural CAD is the core course of Engineering Cost Specialty in higher vocational colleges. If students can gradually develop the ability of architectural drawing recognition and drawing when learning this course, they can lay a foundation for better work after graduation. This paper expounds the nature of Architectural CAD and the significance of cultivating architectural drawing recognition ability of students based on Architectural CAD course, and analyze the strategy of cultivating architectural drawing recognition ability of students based on Architectural CAD course.

An RGB-D Camera Based Visual Positioning System for Assistive Navigation by a Robotic Navigation Aid

There are about 253 million people with visual impairment worldwide. Many of them use a white cane and/or a guide dog as the mobility tool for daily travel. Despite decades of efforts, electronic navigation aid that can replace white cane is still research in progress. In this paper, we propose an RGB-D camera based visual positioning system (VPS) for real-time localization of a robotic navigation aid (RNA) in an architectural floor plan for assistive navigation. The core of the system is the combination of a new 6-DOF depth-enhanced visual-inertial odometry (DVIO) method and a particle filter localization (PFL) method. DVIO estimates RNA's pose by using the data from an RGB-D camera and an inertial measurement unit (IMU). It extracts the floor plane from the camera's depth data and tightly couples the floor plane, the visual features (with and without depth data), and the IMU's inertial data in a graph optimization framework to estimate the device's 6-DOF pose. Due to the use of the floor plane and depth data from the RGB-D camera, DVIO has a better pose estimation accuracy than the conventional VIO method. To reduce the accumulated pose error of DVIO for navigation in a large indoor space, we developed the PFL method to locate RNA in the floor plan. PFL leverages geometric information of the architectural CAD drawing of an indoor space to further reduce the error of the DVIO-estimated pose. Based on VPS, an assistive navigation system is developed for the RNA prototype to assist a visually impaired person in navigating a large indoor space. Experimental results demonstrate that: 1) DVIO method achieves better pose estimation accuracy than the state-of-the-art VIO method and performs real-time pose estimation (18 Hz pose update rate) on a UP Board computer; 2) PFL reduces the DVIO-accrued pose error by 82.5% on average and allows for accurate wayfinding (endpoint position error ≤ 45 cm) in large indoor spaces.

WITHDRAWN: Optimizing FPGA logic block architectures for self-repairing hardened arithmetic

Hardened adder and carry logic is broadly utilized in business FPGAs to increase the effectiveness of arithmetic capacities. There are various plan conclusions and difficulties related to hardening, including circuit design, FPGA architectural decision and CAD stream. The paper offers an area productive hardened error-tolerant full adder design which is capable of self-repairing both single and double error issues, devoid of disturbing the typical activity of the design. The correlation findings of the proposed technique are well shown to guarantee their potential for boss presentation as compared to the existing hardened adder design.

Daylighting Analysis and Simulation Tools in Architectural Design:Review of Tools and Compatibility with Architectural CAD Platforms

Purpose: This research is a review of current and past daylighting simulation tools from the perspective of the Architect, one of the key stakeholder in the integration of the science of daylighting into architectural practice. The review is evaluated based on criteria identified through existing literature. First, a review of integration and interoperability with mainstream architectural CAD platform is initiated and second an evaluation of select tools were performed based on a simple simulation task involving a typical classroom. Method: Over fifty daylighting simulation tools are categorized based on its integration and plotted on an “integration matrix” to illustrate compatibility with mainstream architectural software. The matrix is used as a basis to identify daylighting simulation tools for further evaluation. Evaluation of the tools are based on functionality, ease of use, and visualization. Result: Findings include recent increase in available daylighting simulation tools in the form of plug-ins to existing architectural CAD platforms. In addition, the integration matrix provides valuable information to architects and designers in the selection of Daylighting Simulation Tool, one of the key hurdles that designers face in the implementation of daylighting in architectural design practice. Furthermore, the evaluation of the tools provides information in the aid and development of future Daylighting Simulation Tools.

Laser Survey Tool and Survey Methodology for Direct Architectural Cad Software Connection

Abstract Building Information Modeling (BIM) has been the fastest growing methodology in architectural design, construction, preliminary works and in several other engineering activities in the past few years. It is mostly implemented in the fields of design, construction and building operation, however, there are still unexploited possibilities in further areas – such as building surveys. Many tools are available today to produce detailed and accurate 3D survey data, but specialists and custom software usually have to be involved in the process. Transforming this information into BIM models is also a time-consuming task, as their direct architectural design software integration is limited. The following article introduces a possible solution in order to improve communication and the modeling process.

7-106 建築CAD設計教育の学習モデルと進捗評価の研究((12)教育評価・自己点検・評価システム-II)

7-106 建築CAD設計教育の学習モデルと進捗評価の研究((12)教育評価・自己点検・評価システム-II)

3D MODELLING AND INTERACTIVE WEB-BASED VISUALIZATION OF CULTURAL HERITAGE OBJECTS

Nowadays, there are rapid developments in the fields of photogrammetry, laser scanning, computer vision and robotics, together aiming to provide highly accurate 3D data that is useful for various applications. In recent years, various LiDAR and image-based techniques have been investigated for 3D modelling because of their opportunities for fast and accurate model generation. For cultural heritage preservation and the representation of objects that are important for tourism and their interactive visualization, 3D models are highly effective and intuitive for present-day users who have stringent requirements and high expectations. Depending on the complexity of the objects for the specific case, various technological methods can be applied. The selected objects in this particular research are located in Bulgaria – a country with thousands of years of history and cultural heritage dating back to ancient civilizations. \this motivates the preservation, visualisation and recreation of undoubtedly valuable historical and architectural objects and places, which has always been a serious challenge for specialists in the field of cultural heritage. <br><br> In the present research, comparative analyses regarding principles and technological processes needed for 3D modelling and visualization are presented. The recent problems, efforts and developments in interactive representation of precious objects and places in Bulgaria are presented. Three technologies based on real projects are described: (1) image-based modelling using a non-metric hand-held camera; (2) 3D visualization based on spherical panoramic images; (3) and 3D geometric and photorealistic modelling based on architectural CAD drawings. Their suitability for web-based visualization are demonstrated and compared. Moreover the possibilities for integration with additional information such as interactive maps, satellite imagery, sound, video and specific information for the objects are described. This comparative study discusses the advantages and disadvantages of these three approaches and their integration in multiple domains, such as web-based 3D city modelling, tourism and architectural 3D visualization. It was concluded that image-based modelling and panoramic visualisation are simple, fast and effective techniques suitable for simultaneous virtual representation of many objects. However, additional measurements or CAD information will be beneficial for obtaining higher accuracy.

3D MODELLING AND INTERACTIVE WEB-BASED VISUALIZATION OF CULTURAL HERITAGE OBJECTS

Abstract. Nowadays, there are rapid developments in the fields of photogrammetry, laser scanning, computer vision and robotics, together aiming to provide highly accurate 3D data that is useful for various applications. In recent years, various LiDAR and image-based techniques have been investigated for 3D modelling because of their opportunities for fast and accurate model generation. For cultural heritage preservation and the representation of objects that are important for tourism and their interactive visualization, 3D models are highly effective and intuitive for present-day users who have stringent requirements and high expectations. Depending on the complexity of the objects for the specific case, various technological methods can be applied. The selected objects in this particular research are located in Bulgaria – a country with thousands of years of history and cultural heritage dating back to ancient civilizations. \\this motivates the preservation, visualisation and recreation of undoubtedly valuable historical and architectural objects and places, which has always been a serious challenge for specialists in the field of cultural heritage. In the present research, comparative analyses regarding principles and technological processes needed for 3D modelling and visualization are presented. The recent problems, efforts and developments in interactive representation of precious objects and places in Bulgaria are presented. Three technologies based on real projects are described: (1) image-based modelling using a non-metric hand-held camera; (2) 3D visualization based on spherical panoramic images; (3) and 3D geometric and photorealistic modelling based on architectural CAD drawings. Their suitability for web-based visualization are demonstrated and compared. Moreover the possibilities for integration with additional information such as interactive maps, satellite imagery, sound, video and specific information for the objects are described. This comparative study discusses the advantages and disadvantages of these three approaches and their integration in multiple domains, such as web-based 3D city modelling, tourism and architectural 3D visualization. It was concluded that image-based modelling and panoramic visualisation are simple, fast and effective techniques suitable for simultaneous virtual representation of many objects. However, additional measurements or CAD information will be beneficial for obtaining higher accuracy.

Streamlining Function-oriented Development by Consistent Integration of Automotive Function Architectures with CAD Models

ABSTRACTA primary challenge in the automotive industry is the increasing complexity of modern cars caused by the high amount of vehicle electronics respectively vehicle functions which are implemented as mechatronic systems. A promising solution is the relatively new function-oriented development approach that focuses on the interdisciplinary development of such functions and which helps to handle the high complexity in automotive development. At this stage, however, a function-oriented development does not fully exploit the capabilities of virtual technologies which are fairly well-established technologies in the automotive product development. One reason in particular is that function-oriented data is not yet integrated with geometric CAD data. The authors’ main contributions begin with an analysis of the data structures of function architecture data and CAD data and they provide a definition of the requirements for a consistent mapping of named data structures. Moreover, they also develop a meta-format...

A Research and Practice of the Course Construction of Architectural Drawing and CAD Course - The Awarded Achievement of the 7th Teaching Achievement Awards of Hubei Province

The project was identified as the college teaching research project of Hubei province in 2009. The project explores and practices the construction of new curriculum system of architectural drawing and CAD course actively under the work-integrated learning. The project pushes forward the course overall construction of architectural drawing and CAD course through the construction of teaching material, the reform of teaching methods, teaching techniques and examining modes. High quality teaching resource is provided and applicable talents cultivating quality is improved by the construction of excellent course. The operation ability of students is improved through the construction of training rooms, laboratories and training bases. Improving the talent training mode increases the engineering quality, practice ability and creative spirit. Through nearly four-year teaching practices, remarkable results are obtained.

Cross-Verification of As-Built Point Cloud and GIS-Related Map Data

This study cross-validates existing urban maps using point cloud models to update GIS related data. The model, as-built 3D data, is created to integrate with maps in an architectural CAD platform. The clouds are referred by existing vector maps to verify inconsistency and to update 3D spatial relationships between subjects and environment. The cloud model shows its top reference hierarchy as the updated data for topographic-derived urban maps.

The Discussion of Teaching Effection about Combination of Architectural Graphing and CAD

The Discussion of Teaching Effection about Combination of Architectural Graphing and CAD

한옥 건축공정 자동화를 위한 지능형 설계모듈의 구현

Hanok is a cultural heritage containing our ancestor`s life style intact and breathing alive with us until now. As Hanok has been concerned as a echo-friendly architecture, a new methodology for efficient construction without damaging the traditional construction process comes into request. The goal of this research is development of a architectural design tool based on the BIM(Building Information Modeling) for satisfying these demands. It will be usable to support whole process of the traditional building from digital design to production and construction. Firstly, we take a consideration of the traditional architecture reflecting the spirit of the age and suggest efficient design method for architectural components. Each components is pre-fabricated as a template representing similar components. All pre-fabricated components are designed by object-oriented concepts so, many variations for a component can be derived from the pre-fabricated component. Our method is helpful for reducing design errors because that it considers combining rule between connecting components in the template design. Moreover it is plugged in the commercial architectural CAD, so it can supports digital design not only traditional architecture but also fusion style mixed with modern architecture.

Configuration through the parameterization of building components

Abstract Many construction companies have developed building systems, based on prefabrication strategies, to enhance productivity. Current practice coupled with the difficulties of introducing these systems early in the design process often leads to ad hoc solutions and problems downstream along the value chain. In 2008 a multi-storey timber building system based on modularization principles was developed. The customization process used in this system is illustrated herein using a configurable timber floor slab module. The downstream flow of design information and upstream flow of constraints on, and rules for, the building system are described from three product viewpoints: the customer view, the engineering view and the production view. Using a manufacturing CAD tool, design automation is implemented in the engineering view and connected to an architectural CAD tool. The demonstration software shows that manufacturing CAD tools can be used to create design automation alternatives for modularized building systems within the construction industry.

Modelling colour changes of wood for architectural CAD simulations

It is a fact that the natural material wood changes its appearance during weathering. This study deals with the modelling of the discolouration process on wood colour during natural weathering and the simulation of ageing effects on wood surfaces in computer graphics. A measurement-based technique was used to create a realistic simulation for weathered material. The surface colour for larch and Norway spruce samples was determined according to the CIEL*a*b* system during a natural weathering test over one year. Accordingly, the collected data are smoothed using a local regression method. Based on this model the natural colour changes of wood can be implemented in CAD software and the ageing of the building can be simulated by means of renderings. At the end of the weathering test the colour impression faded and achieved a grey colour. It was recognized that the simulation of the weathering effects and the actual changes during natural weathering are comparable. The developed method can be a starting point for further investigations.

OCTOR: Subset selection in recursive pattern hierarchies

We present an approach for encoding and specifying selections in recursive pattern hierarchies. Hierarchies of patterns of features or other modeling entities are used in architectural and mechanical CAD to eliminate laborious repetitions from the design process. Yet, often a subset of the repeated occurrences in the model must be edited. Specifying a desired selection is often tedious and difficult. Our approach addresses these two drawbacks simultaneously, offering an effective and intuitive solution which requires only two mouse-clicks to specify any one of a wide range of selections, including selections in recursive hierarchies. The selection has a concise representation that is simple to compute.