DESIGN OF A VISION GUIDED MECHATRONIC QUADROTOR SYSTEM USING DESIGN FOR CONTROL METHODOLOGY

2016 ◽  
Vol 40 (2) ◽  
pp. 201-219 ◽  
Author(s):  
Abolfazl Mohebbi ◽  
Sofiane Achiche ◽  
Luc Baron
Keyword(s):  
Visual Servoing ◽  
Design Approach ◽  
Mechatronic Systems ◽  
Quadrotor Uav ◽  
Design Iteration ◽  
Design For Control ◽  
Final Design ◽  
Traditional Approaches ◽  
Control Methodology

Designing mechatronic systems is known to be both a very complex and tedious process. This complexity is due to the high number of system components, their multi-physical aspects, the couplings between different engineering domains and the interacting and/or conflicting design objectives. Due to this inherent complexity and the dynamic coupling between subsystems of mechatronic systems, a systematic and multi-objective design approach is needed to replace the traditionally used sequential design methods. The traditional approaches usually lead to functional but non optimal designs solutions. In this paper, and based on an integrated and concurrent design approach called “Design-for-Control” (DFC), a quadrotor UAV equipped with a stereo visual servoing system is used as a case study. After presenting the dynamics and the control model of the Quadrotor UAV and its visual servoing system, the design process has been performed in four iterations and as expected, the control performance of the system has been significantly improved after finishing the final design iteration.

Mechatronic Multicriteria Profile (MMP) for Conceptual Design of a Robotic Visual Servoing System

2014 ◽  
Author(s):  
Abolfazl Mohebbi ◽  
Sofiane Achiche ◽  
Luc Baron
Keyword(s):  
Conceptual Design ◽  
Visual Servoing ◽  
Design Thinking ◽  
Choquet Integral ◽  
Design Stage ◽  
Physical Aspect ◽  
Mechatronic Systems ◽  
Robotic Visual Servoing ◽  
And Control

Mechatronic systems are a combination of cooperative mechanical, electronics and control components. The high number of their components, their multi-physical aspect, the couplings between the different domains involved and the interacting design objectives makes the design task very tedious ad complex. Due to this inherent complexity, a concurrent systematic and multi-objective design thinking methodology is crucial to replace the often used sequential design approach that tends to deal with the different domains separately. In this research we present a new multi-criteria profile for mechatronic system performance evaluation in conceptual design stage. The newly introduced Mechatronic Multi-criteria Profile (MMP) includes various quantitative members such as intelligence, reliability, complexity, flexibility and cost. A nonlinear fuzzy integral called 2-additive Choquet Integral will be used for the aggregation of criteria and fitting the intuitive requirements for decision-making in the presence of interacting criteria. Finally, the effectiveness of the proposed method will be validated via a case study of designing a robotic visual servoing system.

Breaking the Shackles of Gender Stereotyping to Create New Norms: The Case of Zimbabwean Migrant Women in Mthatha Town

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Sanction Madambi
Keyword(s):  
South Africa ◽  
Gender Stereotyping ◽  
Personal Agency ◽  
Migrant Women ◽  
Host Countries ◽  
Qualitative Research Design ◽  
Norms And Values ◽  
Recent Case Study ◽  
Traditional Approaches

The migration of Zimbabweans into South Africa is shaped by several factors and processes. Traditionally, the decision to migrate was mostly based on family considerations (where gender stereotypic roles were a priority), although in some cases the migrants exercised individualism and personal agency. This led to migration trends that were male dominated. Current Zimbabwean migration trends reflect large volumes of women as the socio-economic crisis forces them to leave their country. These migrant women encounter a myriad of challenges in their host countries. This paper explores Zimbabwean women’s migration to the town of Mthatha in South Africa, highlighting their challenges and the strategies they employ to overcome these, as found in a recent case study. Applying a qualitative research design and using questionnaires and interviews to gather data from the 100 purposively sampled women, the study found that many Zimbabwean migrant women in Mthatha encountered numerous challenges. They lacked the required documents to live and work in South Africa, experienced exploitation and marriage constraints, and had broken ties with their families back in Zimbabwe. According to the study, these women managed to navigate these challenges, rising above the stereotypic norms and values that used to label them as non-productive citizens to superheroes who were supporting their families and the country’s economy—thus breaking the shackles of gender stereotyping to create new norms. These findings underline the importance of shifting from the traditional approaches to women migration and pursuing perspectives that present migration as a critical component of the process of social change and development to all migrants.

Teaching Computing in a Multidisciplinary Way in Social Studies Classes in School – A Case Study

2017 ◽  
Vol 1 (2) ◽  
pp. 3 ◽  
Author(s):  
Christiane Gresse Von Wangenheim ◽  
Nathalia Cruz Alves ◽  
Pedro Eurico Rodrigues ◽  
Jean Carlo Hauck
Keyword(s):  
Instructional Design ◽  
Social Studies ◽  
21St Century ◽  
Multidisciplinary Approach ◽  
Design Approach ◽  
Instructional Unit ◽  
Computing Education ◽  
Interest And Motivation

In order to be well-educated citizens in the 21st century, children need to learn computing in school. However, implementing computing education in schools faces several practical problems, such as lack of computing teachers and time in an already overloaded curriculum. A solution can be a multidisciplinary approach, integrating computing education within other subjects in the curriculum. The present study proposes an instructional unit for computing education in social studies classes, with students learning basic computing concepts by programming history related games using Scratch. The instructional unit is developed following an instructional design approach and is applied and evaluated through a case study in four classes (5th and 7th grade) with a total of 105 students at a school in (omitted for submission). Results provide a first indication that the instructional unit enables the learning of basic computing concepts (specifically programming) in an efficient, effective and entertaining way increasing also the interest and motivation of students to learn computing.

scholarly journals Bi-objective design-for-control of water distribution networks with global bounds

2021 ◽  
Author(s):  
Aly-Joy Ulusoy ◽  
Filippo Pecci ◽  
Ivan Stoianov
Keyword(s):  
Water Distribution ◽  
Distribution Networks ◽  
Water Distribution Networks ◽  
Mixed Integer ◽  
Global Optimality ◽  
Linear Programs ◽  
Design For Control ◽  
Non Linear ◽  
Feasible Solutions

AbstractThis manuscript investigates the design-for-control (DfC) problem of minimizing pressure induced leakage and maximizing resilience in existing water distribution networks. The problem consists in simultaneously selecting locations for the installation of new valves and/or pipes, and optimizing valve control settings. This results in a challenging optimization problem belonging to the class of non-convex bi-objective mixed-integer non-linear programs (BOMINLP). In this manuscript, we propose and investigate a method to approximate the non-dominated set of the DfC problem with guarantees of global non-dominance. The BOMINLP is first scalarized using the method of $$\epsilon $$ ϵ -constraints. Feasible solutions with global optimality bounds are then computed for the resulting sequence of single-objective mixed-integer non-linear programs, using a tailored spatial branch-and-bound (sBB) method. In particular, we propose an equivalent reformulation of the non-linear resilience objective function to enable the computation of global optimality bounds. We show that our approach returns a set of potentially non-dominated solutions along with guarantees of their non-dominance in the form of a superset of the true non-dominated set of the BOMINLP. Finally, we evaluate the method on two case study networks and show that the tailored sBB method outperforms state-of-the-art global optimization solvers.

scholarly journals BRINGING SYSTEMIC DESIGN IN THE EDUCATIONAL PRACTICE: THE CASE OF GENDER EQUALITY IN AN ACADEMIC CONTEXT

2021 ◽  
Vol 1 ◽  
pp. 581-590
Author(s):  
Alexis JP Jacoby ◽  
Kristel Van Ael
Keyword(s):  
Gender Inequality ◽  
Design Education ◽  
Educational Practice ◽  
Design Approach ◽  
Academic Context ◽  
Traditional Design ◽  
Systemic Problems ◽  
Societal Problems ◽  
Systemic Design

AbstractThe field of design practice and design education is reaching out to address problems that cannot be solved by introducing a single product or service. Complex societal problems such as gender inequality cannot be solved using a traditional problem-solving oriented design approach. The specific characteristics of these problems require new ways of dealing with the dynamics, scale and complexity of the problem.Systemic design is a design approach integrating systems thinking in combination with more traditional design methodologies, addressing complex and systemic problems. This paper reports a systemic design approach in an educational context for the case of academic gender inequality. We show the way the problem was addressed and how design students were invited to take a systemic perspective, provide integrated interventions and take first steps in providing instruments for implementation. We conclude with the learnings from this case study, both on the process and the results.

Investigation of a passive design approach for a building facility: a case study

2021 ◽  
pp. 1-19
Author(s):  
Dusan Randjelovic ◽  
Miomir Vasov ◽  
Marko Ignjatovic ◽  
Mirko Stojiljkovic ◽  
Veliborka Bogdanovic
Keyword(s):  
Design Approach ◽  
Passive Design

MANAJEMEN OPERASI DAKWAH:INVESTIGASI EKSPLANATORI PADA PROGRAM KHUTBAH JUMAT DI MASJID AL-FALAH SURABAYA

2019 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
A. Faiz Khudlari Thoha ◽  
Reka Gunawan ◽  
Bambang Subandi
Keyword(s):  
Data Collection ◽  
Production Process ◽  
Selection Mechanism ◽  
Final Design ◽  
Depth Interviews

ABSTRACTThis study aims to provide an overview of the strategy and management of the Friday Khutbah production process at the Al-Falah Mosque in Surabaya as its object. The method used by researchers in this research is a case study with data collection procedures using in-depth interviews, observation, and documentation. So that researchers can explore the phenomenon of the object of research in detail and depth. The findings that occur in the field show results that are sharpened by descriptive descriptions of several categories of production. First, the process of determining the idea of the Friday sermon program at Al-Falah Mosque. Second, for the selection mechanism for Friday sermons at Al-Falah Mosque. Third, the design of the Friday sermon program at Al-Falah Mosque. Fourth, testing and evaluating the Friday sermon program at Al-Falah Mosque. Fifth, the final design of the Friday sermon program at Al-Falah Mosque.ABSTRAKPenelitian ini ditujukan untuk memberikan gambaran mengenai strategi dan manajemen proses produksi khutbah Jum’at di Masjid Al-Falah Surabaya sebagai objeknya.  Metode yang digunakan oleh peneliti dalam penelitian ini ialah studi kasus dengan prosedur pengumpulan data menggunakan wawancara secara mendalam, observasi, dan dokumentasi. Sehingga peneliti dapat menggali fenomena pada objek penelitian secara rinci dan mendalam. Temuan yang terjadi di lapangan menunjukkan hasil yang dipertajam dengan uraian deskriptif mengenai beberapa kategori produksi khubah. Pertama,  proses penentuan gagasan  program khutbah Jum’at di Masjid Al-Falah. Kedua, untuk mekanisme  seleksi program khutbah Jum’at di Masjid Al-Falah. Ketiga, desain program khutbah Jum’at di Masjid Al-Falah. Keempat, pengujian dan evaluasi program khutbah Jum’at di Masjid Al-Falah. Kelima, desain akhir program khutbah Jum’at di Masjid Al-Falah. 

scholarly journals Dealing with Interval DEA Based on Error Propagation and Entropy: A Case Study of Energy Efficiency of Regions in China Considering Environmental Factors

2015 ◽  
Vol 3 (6) ◽  
pp. 538-548 ◽  
Author(s):  
Jianping Fan ◽  
Weizhen Yue ◽  
Meiqin Wu
Keyword(s):  
Energy Efficiency ◽  
Environmental Factors ◽  
Error Propagation ◽  
Interval Data ◽  
Data Envelopment ◽  
Exact Data ◽  
Dea Models ◽  
Traditional Approaches ◽  
Decision Making Units

AbstractThe conventional data envelopment analysis (DEA) measures the relative efficiency of decision making units (DMUs) consuming multiple inputs to produce multiple outputs under the assumption that all the data are exact. In the real world, however, it is possible to obtain interval data rather than exact data because of various limitations, such as statistical errors and incomplete information, et al. To overcome those limitations, researchers have proposed kinds of approaches dealing with interval DEA, which either use traditional DEA models by transforming interval data into exact data or get an efficiency interval by using the bound of interval data. In contrast to the traditional approaches above, the paper deals with interval DEA by combining traditional DEA models with error propagation and entropy, uses idea of the modified cross efficiency to get the ultimate cross efficiency of DMUs in the form of error distribution and ranks DMUs using the calculated ultimate cross efficiency by directional distance index. At last we illustrate the feasibility and effectiveness of the proposed method by applying it to measure energy efficiency of regions in China considering environmental factors.

Sign in / Sign up

Export Citation Format

Share Document