Development of a Haptic Modeling and Simulation System for Handheld Product Design and Evaluation

2009 ◽  
Author(s):  
Jinling Wang ◽  
Wen F. Lu
Keyword(s):  
Modeling And Simulation ◽  
Product Design ◽  
Interface Design ◽  
Complex Shape ◽  
Haptic Feedback ◽  
Simulation System ◽  
Handheld Device ◽  
Physical Prototype ◽  
Update Rate ◽  
The Cost

In this paper, a haptic modeling and simulation system is developed to assist handheld product design. With haptic feedback, users could create, interact and evaluate the virtual product directly and intuitively without producing the physical prototype. This saves the cost and reduces time-to-market, which is especially meaningful for the rapidly changing handheld mobile devices. To provide a comfortable and accurate operation, a virtual vibration actuator is devised to add into the touch screen. Unlike the previous research that mainly focuses on the design of the product shape, the proposed system also models the interaction between the user (finger) or tool (pen) and handheld device (button/screen). To obtain realistic simulation and replace the physical prototype, the complex shape and deformation of the finger are considered when calculating the feedback force. A computational efficient collision detection method for complex shape objects is proposed to tackle the challenge of a high update rate of more than 1 kHz for real-time realistic haptic rendering. Moreover, the proposed system incorporates the haptic modeling of vibration interaction and menu interface design into the product design simulation system. A case study of handheld device design is used to illustrate the proposed system.

A Real-Time Haptics-Based Deformable Model for Virtual Prototyping and Simulations

2009 ◽  
Author(s):  
Jinling Wang ◽  
Wen F. Lu
Keyword(s):  
Real Time ◽  
Material Properties ◽  
Computer Animation ◽  
Force Feedback ◽  
Haptic Feedback ◽  
Simulation System ◽  
Deformable Model ◽  
Chain Model ◽  
Physically Based ◽  
Update Rate

Virtual reality technology plays an important role in the fields of product design, computer animation, medical simulation, cloth motion, and many others. Especially with the emergence of haptics technology, virtual simulation system provides an intuitive way of human and computer interaction, which allows user to feel and touch the virtual environment. For a real-time simulation system, a physically based deformable model including complex material properties with a high resolution is required. However, such deformable model hardly satisfies the update rate of interactive haptic rendering that exceeds 1 kHz. To tackle this challenge, a real-time volumetric model with haptic feedback is developed in this paper. This model, named as Adaptive S-chain model, extends the S-chain model and integrates the energy-based wave propagation method by the proposed adaptive re-mesh method to achieve realistic graphic and haptic deformation results. The implemented results show that the nonlinear, heterogeneous, anisotropic, shape retaining material properties and large range deformation are well modeled. An accurate force feedback is generated by the proposed Adaptive S-chain model in case study which is quite close to the experiment data.

Anti-Ship Missile Attack-Defense Confrontation Ability Verification Technology Based on Simulation

2014 ◽  
Vol 1049-1050 ◽  
pp. 1227-1232
Author(s):  
Jian Qiang Zhang ◽  
Hou Xiang Wang ◽  
Hong Mei Yang
Keyword(s):  
Signal Processing ◽  
Modeling And Simulation ◽  
Military Training ◽  
Simulation System ◽  
Work Process ◽  
The Cost ◽  
The Military ◽  
Missile Attack ◽  
Terminal Guidance ◽  
Made In

A detailed study on modeling and simulation of anti-ship missile terminal guidance radar whole work process, such as target echo, environmental clutter, electronic jamming ,signal processing and data processing etc, is made in this paper.On this basis, an anti-ship missile attack-defense confrontation simulation system is developed to realize the verification of anti-ship missile attack-defense confrontation ability. The application of this simulation system proves that the efficiency of the military training is improved and the cost of training is cut down.

scholarly journals Refine the Students’ Skills Through Design Education to Create Ethical Products

SAGE Open ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 215824402199836
Author(s):  
Tarek Ismail Mohamed
Keyword(s):  
Product Design ◽  
Interface Design ◽  
Visual Information ◽  
Design Education ◽  
Vital Role ◽  
Ethical Aspects ◽  
Product Features ◽  
Ethical Products ◽  
Appearance Design ◽  
Design Values

This article focuses on applying the ethics of the product features during the students’ design education. Good/Bad design term is a conventional approach to discuss the ethical/unethical design values of the products. It is noted that different aspects of the product design such as visual information design, interface design, and appearance design have a vital role in judging the levels of ethics in the product. So the students of product design everywhere need to practice the term ethical/unethical design during their study because designers influence society more than they could imagine. This influence can be done by creating an attractive organized appearance and perfect functions that support the ethical brand’s image to the customers. The interviews and discussions were held as a research method with the students of product design in some institutions in addition to some design experts and customers to find out their opinions about the design values that achieve the ethical dimensions in the product design. They can end up with products that carry ethical values in their design. The final article’s results are in the descending order of the different design values according to their importance in emphasizing the ethical aspects of the products, in addition to a checklist including some important questions that can help the designers to be more aware of ethics’ considerations in the product design because ethics is a process of learning, not a process of obedience, and to highlighting the term of ethical designer which in turn reflects on the ethics of customers and societies.

scholarly journals Markerless 3D Interaction in an Unconstrained Handheld Mixed Reality Setup

2015 ◽  
Vol 15 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Daniel Fritz ◽  
Annette Mossel ◽  
Hannes Kaufmann
Keyword(s):  
Mixed Reality ◽  
Recognition Rate ◽  
Hand Posture ◽  
3D Interaction ◽  
Handheld Device ◽  
Advantages And Disadvantages ◽  
Depth Data ◽  
Environmental Properties ◽  
Update Rate ◽  
Interaction Task

In mobile applications, it is crucial to provide intuitive means for 2D and 3D interaction. A large number of techniques exist to support a natural user interface (NUI) by detecting the user's hand posture in RGB+D (depth) data. Depending on the given interaction scenario and its environmental properties, each technique has its advantages and disadvantages regarding accuracy and the robustness of posture detection. While the interaction environment in a desktop setup can be constrained to meet certain requirements, a handheld scenario has to deal with varying environmental conditions. To evaluate the performance of techniques on a mobile device, a powerful software framework was developed that is capable of processing and fusing RGB and depth data directly on a handheld device. Using this framework, five existing hand posture recognition techniques were integrated and systematically evaluated by comparing their accuracy under varying illumination and background. Overall results reveal best recognition rate of posture detection for combined RGB+D data at the expense of update rate. To support users in choosing the appropriate technique for their specific mobile interaction task, we derived guidelines based on our study. In the last step, an experimental study was conducted using the detected hand postures to perform the canonical 3D interaction tasks selection and positioning in a mixed reality handheld setup.

scholarly journals RESEARCH OF CLOUDY TECHNOLOGIES AS А SERVICES

2020 ◽  
Vol 3 (7) ◽  
pp. 43-62
Author(s):  
Tetyana Smirnova ◽  
Liudmyla Polishchuk ◽  
Oleksii Smirnov ◽  
Kostiantyn Buravchenko ◽  
Andrii Makevnin
Keyword(s):  
Computer Aided Design ◽  
Service Providers ◽  
Cloud Service ◽  
Computer Engineering ◽  
Durability Design ◽  
Physical Prototype ◽  
Extended Analysis ◽  
Basic Services ◽  
The Cost ◽  
Cloud Technologies

In order to determine the basic conditions for further research to identify threats to cloud technologies and measures for their counteraction, the article provides an extended analysis of cloud computing as a service. Among the above services, the basic services IaaS, SaaS, PaaS are selected, which are the basis for the existence of more unified services (CaaS, MCaS, DaaS, FaaS, IPaaS, MBaaS, NaaS, SeCaa, DBaaS, MaaS, DBaaS, MaaS, DBaaS, MaaS that increase the scope. Listed are possible service providers, including Ukrainian. It is determined that in order to transfer the work of systems of engineering calculations and computer-aided design (CAD) systems to a cloud platform, a rather new promising service CAEaaS (Cоmputеr Аidеd Еnginееrіng аs а Sеrvіcе) – computer engineering systems as a service. The most popular SAEs are used in the following industries: mechanical engineering and machine tools, defense and aerospace, energy, shipbuilding, semiconductor production, telecommunications, chemical, pharmaceutical and medical industry, construction, production of heating, air conditioning, ventilation. The success of a project decision depends on the awareness of responsible choice in the very first stage. Unfortunately, in support of the CAEaaS cloud service, Ukraine is only making the first steps and can provide the technological needs of enterprises, provided the involvement of foreign suppliers. According to the authors of the article, the future of the Ukrainian industry according to the cloud service SAEaS. Because CAE helps reduce the cost and time of product development, improve product quality and durability. Design decisions can be made based on their impact on performance. Designs can be evaluated and refined using computer modeling rather than physical prototype testing, saving money and time. This article is the basis for further research on the identification of threats to cloud technologies and their response.

Modeling and Simulation of an Improved Measure of MPPT in Photovoltaic System

2011 ◽  
Vol 88-89 ◽  
pp. 244-249 ◽  
Author(s):  
Shou Jiang Cai ◽  
Pei Liang Wang ◽  
Zhi Duan Cai ◽  
Jian Hua Mao
Keyword(s):  
Modeling And Simulation ◽  
Simulation System ◽  
Photovoltaic System ◽  
Storage Space ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Simulation Results ◽  
Power Point ◽  
Accuracy Of Results

Intermittent scan tracking (IST) is a maximum power point tracking (MPPT) method of photovoltaic system. The scanning approach of this method generally is order scanning. But this scanning mode has the weaknesses of the huge storage space and excessive amount of calculation. To eliminate these defects, this paper proposes a new scanning mode, i.e. nested scanning. To verify the effectiveness of the proposed method, a simulation system was modeled based on Matlab/Simulink. In the experiment two scanning modes above were compared and the simulation results proved that, on the premise that the accuracy of results is guaranteed, nested scanning mode can effectively decrease the quantity of required scanning voltages and currents, reduce the amount of calculation and improve the scanning efficiency.

Usability in Mobile Computing and Commerce

2009 ◽  
pp. 1480-1486
Author(s):  
Kuanchin Chen ◽  
Hy Sockel ◽  
Louis K. Falk
Keyword(s):  
Product Design ◽  
User Satisfaction ◽  
Interface Design ◽  
Empirical Studies ◽  
Social Environments ◽  
Iso Standard ◽  
Product Features ◽  
Positive Attitudes ◽  
Favorable Impression ◽  
Context Of Use

Usability is an acknowledged important aspect of any system or product design. Many times it is related to not only product features, but also ultimately profit that can be generated from the product. Good interface design promotes higher mutuality (feeling similar and connected), which in turn leads to higher levels of involvement and a favorable impression of credibility. Many practitioners and researchers (such as Jakob Nielsen, 2000) have elaborated on usability aspects, but few have agreed upon a unifying definition. In 1998 the International Organization for Standardization (ISO) defined usability as the “Extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use” (ISO 9241-11, 1998, p. 2). From this definition it can be construed that effectiveness, efficiency, and satisfaction are three pillars for usability measures. In this regard, the ISO defines: • Effectiveness as the “accuracy and completeness with which users achieve specified goals,” • Efficiency as the “resources expended in relation to the accuracy and completeness with which users achieve goals,” and • Satisfaction as the “freedom from discomfort, and positive attitudes towards the use of the product.” The ISO standard acknowledges that the level of usability depends highly on the intended context of use (e.g., users, hardware, software, and social environments). Researchers have demonstrated that the three ISO usability components are distinct. Frøkjær, Hertzum, and Hornbæk (2000) found only a weak relationship among the three usability components. Walker, Fromer, Di Fabbrizio, Mestel, and Hindle (1998) found that efficiency did not translate into user satisfaction. These empirical studies suggest that efficiency, effectiveness, and satisfaction may be independent aspects of usability and a causal relationship among them may be weak or even nonexistent.

scholarly journals Inverse transport modeling of volcanic sulfur dioxide emissions using large-scale simulations

2016 ◽  
Vol 9 (4) ◽  
pp. 1627-1645 ◽  
Author(s):  
Yi Heng ◽  
Lars Hoffmann ◽  
Sabine Griessbach ◽  
Thomas Rößler ◽  
Olaf Stein
Keyword(s):  
Time Series ◽  
Sulfur Dioxide ◽  
Modeling And Simulation ◽  
Inverse Modeling ◽  
Simulation System ◽  
Transport Modeling ◽  
Volcanic Emissions ◽  
Emission Time ◽  
Simulation Results ◽  
Inverse Transport

Abstract. An inverse transport modeling approach based on the concepts of sequential importance resampling and parallel computing is presented to reconstruct altitude-resolved time series of volcanic emissions, which often cannot be obtained directly with current measurement techniques. A new inverse modeling and simulation system, which implements the inversion approach with the Lagrangian transport model Massive-Parallel Trajectory Calculations (MPTRAC) is developed to provide reliable transport simulations of volcanic sulfur dioxide (SO2). In the inverse modeling system MPTRAC is used to perform two types of simulations, i.e., unit simulations for the reconstruction of volcanic emissions and final forward simulations. Both types of transport simulations are based on wind fields of the ERA-Interim meteorological reanalysis of the European Centre for Medium Range Weather Forecasts. The reconstruction of altitude-dependent SO2 emission time series is also based on Atmospheric InfraRed Sounder (AIRS) satellite observations. A case study for the eruption of the Nabro volcano, Eritrea, in June 2011, with complex emission patterns, is considered for method validation. Meteosat Visible and InfraRed Imager (MVIRI) near-real-time imagery data are used to validate the temporal development of the reconstructed emissions. Furthermore, the altitude distributions of the emission time series are compared with top and bottom altitude measurements of aerosol layers obtained by the Cloud–Aerosol Lidar with Orthogonal Polarization (CALIOP) and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) satellite instruments. The final forward simulations provide detailed spatial and temporal information on the SO2 distributions of the Nabro eruption. By using the critical success index (CSI), the simulation results are evaluated with the AIRS observations. Compared to the results with an assumption of a constant flux of SO2 emissions, our inversion approach leads to an improvement of the mean CSI value from 8.1 to 21.4 % and the maximum CSI value from 32.3 to 52.4 %. The simulation results are also compared with those reported in other studies and good agreement is observed. Our new inverse modeling and simulation system is expected to become a useful tool to also study other volcanic eruption events.

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