PIL simulations of an FWUAV under windy conditions

2018 ◽  
Vol 90 (2) ◽  
pp. 461-470
Author(s):  
Hakan Ülker ◽  
Cemal Baykara ◽  
Can Özsoy
Keyword(s):  
Linear Models ◽  
Low Cost ◽  
Wind Gust ◽  
Content Type ◽  
Flying Qualities ◽  
Aerial Vehicle ◽  
Model Predictive Controllers ◽  
Predictive Controllers ◽  
Complex Trajectories ◽  
Practical Implications

Purpose A fixed wing unmanned aerial vehicle (FWUAV) is targeted to perform processor in the loop (PIL) simulations for the flight scenarios such as straight and level, level climb, level turn, climbing turn and level steady heading sideslip under windy conditions such as steady wind (SW) and wind gust (WG) in a desired and controlled manner. Design/methodology/approach The constrained multi-input–multi-output (MIMO) lateral and longitudinal linear models-based model predictive controllers (MPCs) which are proposed in a previous study (Ulker et al., 2017) are tested in the PIL simulations under specified windy conditions. BeagleBone Black Rev C is used as a target hardware or processor in the PIL simulations. Findings The results of the PIL simulations show that the MPCs proposed in the previous study can achieve satisfactory performance and flying qualities for the all flight scenarios handled in this paper under windy conditions. Practical implications The MPCs proposed in the previous study can be easily implemented in the real world to a low-cost and small-sized board like BeagleBone Black Rev C which is used in this paper. Originality/value The proposed MPCs in the previous study which are capable of providing more flexibility in terms of tracking complex trajectories are showed to be able to be implemented to real system by means of PIL simulations under the changeable windy conditions which are difficult for performance tests.

Design of MPCs for a fixed wing UAV

2017 ◽  
Vol 89 (6) ◽  
pp. 893-901 ◽  
Author(s):  
Hakan Ülker ◽  
Cemal Baykara ◽  
Can Özsoy
Keyword(s):  
Flight Control ◽  
Linear Models ◽  
University Of Minnesota ◽  
Content Type ◽  
Simulink Model ◽  
Flying Qualities ◽  
Aerial Vehicle ◽  
Model Predictive Controllers ◽  
Mimo Model ◽  
The University

Purpose The purpose of the paper is to examine a fixed wing unmanned aerial vehicle (UAV) as it undergoes five flight scenarios under straight and level, level climb, level turn, climbing turn and level steady heading sideslip conditions in a desired and controlled manner using constrained multi input multi output (MIMO) model predictive controllers (MPCs). Design/methodology/approach An MPC strategy based on the lateral and longitudinal linear models is proposed for the flight control design. Simulations are carried out for the nonlinear closed-loop aircraft Simulink model available from the University of Minnesota UAV research group with the implemented MIMO MPCs designed in this paper. Findings The results of the simulations show that the MIMO MPCs can achieve satisfactory performance and flying qualities under three different test conditions in terms of existing unmeasured outputs and unmeasured output disturbances. Practical Implications The MPCs designed in this paper can be implemented to UAVs. Therefore, the implementation is considered as an advanced research. Originality/value The proposed MPC design in this paper provides more flexibility in terms of tracking complex trajectories comparing with the classical controllers in the literature. Besides they provide to change more than one reference of the states at any time.

Web-based tools for collaborative research

2017 ◽  
Vol 34 (8) ◽  
pp. 8-19
Author(s):  
Stacy Brody
Keyword(s):  
Collaborative Research ◽  
Design Methodology ◽  
Research Collaboration ◽  
Low Cost ◽  
Research Process ◽  
Web Based ◽  
Content Type ◽  
Collaborative Tools ◽  
Start Ups ◽  
Practical Implications

Purpose The purpose of this paper is to profile various types of Web-based tools to facilitate research collaboration within and across institutions. Design/methodology/approach Various Web-based tools were tested by the author. Additionally, tutorial videos and guides were reviewed. Findings There are various free and low-cost tools available to assist in the collaborative research process, and librarians are well-positioned to facilitate their usage. Practical implications Librarians and researchers will learn about various types of tools available at free or at low cost to fulfill needs of the collaborative research process. Social implications As the tools highlighted are either free or of low cost, they are also valuable to start-ups and can be recommended for entrepreneurs. Originality/value As the realm of Web-based collaborative tools continues to evolve, the options must be continually revisited and reviewed for currency.

A place to work: examining workplace location attributes that appeal to generation Y and Z talent

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Wasuthon Wisuchat ◽  
Viriya Taecharungroj
Keyword(s):  
Generation Y ◽  
Low Cost ◽  
Rapid Development ◽  
Traffic Density ◽  
Structured Interviews ◽  
Content Type ◽  
Work Activities ◽  
Development Plans ◽  
The City ◽  
Practical Implications

Purpose This paper aims to identify and to compare workplace location attributes that appealed to Generation Y and Z talent. Design/methodology/approach Semi-structured interviews were conducted with 12 participants to identify workplace location attributes. Choice-based conjoint surveys were collected from 750 Generation Y and Z individuals in the talent pool of Bangkok, Thailand to compare the importance of attributes. Findings The most important workplace location attribute was the availability and diversity of restaurants followed by place appearance, traffic density, availability of public workspaces, public transport and after-work activities. Transport-related attributes were more important for older generations, whereas public workspaces and place appearance were more important for younger talent. Practical implications To attract talent, the Bangkok Metropolitan Administration (BMA) should address the weaknesses of potential workplace locations through efficient, low-cost and rapid development plans. Although Bangkok is known for street food, BMA policies that promote restaurants as the most important attribute are limited. The BMA should initiate plans to promote the availability and diversity of restaurants. Innovation districts in Bangkok should connect to restaurants and food networks in their vicinity. Originality/value The existing literature explored factors that attract talent at the city level, but no study has investigated attractiveness at the workplace location level. Despite some similarities, workplace location attributes identified in this study were more specific than city-level attributes.

Vision-based pose estimation of a multi-rotor unmanned aerial vehicle

2019 ◽  
Vol 7 (3) ◽  
pp. 120-132
Author(s):  
Kashish Gupta ◽  
Bara Jamal Emran ◽  
Homayoun Najjaran
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Three Dimensional ◽  
Processing System ◽  
Training Procedure ◽  
Autonomous Landing ◽  
Content Type ◽  
Landing Platform ◽  
Aerial Vehicle ◽  
Autopilot Systems ◽  
Practical Implications

Purpose The purpose of this paper is to facilitate autonomous landing of a multi-rotor unmanned aerial vehicle (UAV) on a moving/tilting platform using a robust vision-based approach. Design/methodology/approach Autonomous landing of a multi-rotor UAV on a moving or tilting platform of unknown orientation in a GPS-denied and vision-compromised environment presents a challenge to common autopilot systems. The paper proposes a robust visual data processing system based on targets’ Oriented FAST and Rotated BRIEF features to estimate the UAV’s three-dimensional pose in real time. Findings The system is able to visually locate and identify the unique landing platform based on a cooperative marker with an error rate of 1° or less for all roll, pitch and yaw angles. Practical implications The proposed vision-based system aims at on-board use and increased reliability without a significant change to the computational load of the UAV. Originality/value The simplicity of the training procedure gives the process the flexibility needed to use a marker of any unknown/irregular shape or dimension. The process can be easily tweaked to respond to different cooperative markers. The on-board computationally inexpensive process can be added to off-the-shelf autopilots.

An efficient termination control strategy of air-vented dryer for fabric drying

2018 ◽  
Vol 30 (3) ◽  
pp. 412-427 ◽  
Author(s):  
Yuhui Wei ◽  
Zhaowei Su ◽  
Huashan Lu ◽  
Xue Mei Ding
Keyword(s):  
Energy Consumption ◽  
Control Strategy ◽  
Low Cost ◽  
Drying Time ◽  
Content Type ◽  
Exhaust Duct ◽  
Microscopic Damage ◽  
Novel Strategy ◽  
Drying Efficiency ◽  
Practical Implications

Purpose The purpose of this paper is to develop an efficient termination control strategy of air-vented dryer in term of energy saving, improving smoothness and reducing microscopic damage of fiber. Design/methodology/approach A simple, low cost termination control strategy is developed by testing the instantaneous humidity of exhaust air and then deducing the drying degree of fabric in process. The practicability evaluation of this novel strategy was investigated by using both experimental and mathematical approaches. The effect of termination control strategy on drying efficiency and fabric apparent properties were also discussed. Findings Termination control strategy significantly affects drying time, energy consumption, smoothness and microscopic of fiber. Specially, a novel termination control strategy that the combination of equilibrium moisture content of fabric in ambient environment and relative humidity of exhaust air in exhaust duct is workable and can save 25.2 percent of energy consumption, 26.7 percent of the drying time and improve 0.7 grade of the appearance smoothness, as well as significantly reduce the microscopic damage of fiber compare to the original control strategy of dryer. This indicates possible ways to minimize drying energy consumption and dryer damage by reducing unnecessary migrate out of the water from the clothes. Practical implications The paper is helpful in not only the development of new drying product but also the optimization of appearance smoothness of fabric after drying and reduce the microscopic damage of fiber. Originality/value A novel termination control strategy of dryer is applied to improve drying efficiency of dryer and reduce fabric damage.

Developing the right brand image

2018 ◽  
Vol 34 (9) ◽  
pp. 35-36
Keyword(s):  
Case Studies ◽  
Design Methodology ◽  
Reading Time ◽  
Brand Image ◽  
Low Cost ◽  
Content Type ◽  
Customer Base ◽  
Pertinent Information ◽  
The Right ◽  
Practical Implications

Purpose Reviews the latest management developments across the globe and pinpoints practical implications from cutting-edge research and case studies. Design/methodology/approach This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context. Findings Developing a feeling of authenticity about products amongst the target customer base is an essential goal for marketers even in terms of low cost items. Consumers derive information from a broad range of marketing communications and consistency is a key element for success. Originality/value The briefing saves busy executives and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

Modified sugarcane bagasse for the removal of anionic dyes from aqueous solution

2019 ◽  
Vol 48 (5) ◽  
pp. 464-471
Author(s):  
Fatma Abdelghaffar ◽  
Rehab A. Abdelghaffar ◽  
Safia A. Mahmoud ◽  
Badria M. Youssef
Keyword(s):  
Sugarcane Bagasse ◽  
Low Cost ◽  
Morphological Structure ◽  
Adsorption Efficiency ◽  
X Ray Diffraction ◽  
Anionic Dyes ◽  
Content Type ◽  
Chemically Modified ◽  
Ft Ir ◽  
Practical Implications

Purpose This paper aims to improve the adsorption capacity of sugarcane bagasse (SCB) as a low-cost, attractive and effective adsorbent for dye removal from wastewater. Design/methodology/approach SCB is a cellulosic material; it was chemically modified with compounds containing cationic groups. The adsorption efficiency of unmodified and modified SCB was investigated with anionic dyes by studying various factors that affect modified SCB and adsorption. Findings X-ray diffraction, FT-IR spectra and nitrogen content were used to confirm the effect of existence of quaternary ammonium groups on modified SCB. The morphological structure of the modified and unmodified SCB has been demonstrated using electronic scanning microscopy. Research limitations/implications The modified SCB was chemically treated by Quat 188, which is commercially available in the solution of 3-chloro-2-hydroxypropyltrimethyl ammonium chloride. Practical implications Grafting cationic function groups on the surface of sugarcane by cationization treatment enhances its adsorption efficiency for anionic dyes. Originality/value The main value of this research was indicating a clear difference in the appearance of unmodified and modified SCB surfaces. Furthermore, it can be determined that the modified SCB absorbs more of the dyes.

Airport noise compensation: real estate perspective

2019 ◽  
Vol 12 (2) ◽  
pp. 250-266 ◽  
Author(s):  
Jacek Batóg ◽  
Iwona Foryś ◽  
Jan Konowalczuk
Keyword(s):  
Real Estate ◽  
Noise Level ◽  
Linear Models ◽  
Real Estate Market ◽  
Single Family ◽  
Content Type ◽  
Explanatory Variables ◽  
Noise Compensation ◽  
Restricted Use ◽  
Practical Implications

Purpose This study aims to present a problem of noise compensation related to the localization of single-family houses in the restricted use areas (RUA) created around airports. The authors presented different methodological approaches to the valuation of such amends and characterized distinct solutions applied in that area in chosen countries and cities. Design/methodology/approach To estimate the level of those indemnities, linear models including spatial and generalized linear models, were applied. The set of explanatory variables contains quantitative and qualitative attributes of real estates. The influence of outliers indicated by means of cluster analysis on the received results were also considered. Findings The results show that after accounting for noise level and house characteristics, houses in noisier areas were sold for less than houses subjected to less noise. Unit prices of houses located outside the RUA were on average 17.05 per cent higher than the prices observed in zone with noise level for the daytime of 60 dB and 8.95 per cent in zone characterized by noise level for the daytime of 55 dB. Practical implications Received results can be compared with results obtained by other authors, but its most important application is possibility of use the proposed methodology by judicial appraisers to assess the proper level of noise compensation for home owners or tenants. Originality/value An identification of real estate market heterogeneity and its considering in estimation of compensation related to airport noise evidence some novelty of the research.

Tweeting to a job: HCL’s recruitment campaign on Twitter

2016 ◽  
Vol 24 (5) ◽  
pp. 4-6 ◽  
Author(s):  
Vivek Kumar ◽  
Arpita Srivastava
Keyword(s):  
Media Coverage ◽  
Creative Thinking ◽  
Low Cost ◽  
Recruitment Process ◽  
Case Study Methodology ◽  
Content Type ◽  
Brand Building ◽  
Study Methodology ◽  
Practical Implications

Purpose This paper aims to describe an innovative recruitment campaign at HCL Technologies, India’s fourth largest information technology company. This campaign received media coverage in 60 national and international news outlets. Design/methodology/approach Using case study methodology, this paper explains how the unique process was carried out. Risks associated with the process are also identified. Findings It reveals that creative thinking and innovate practices can generate high social media engagement at a very low cost, while also fulfilling the task of recruitment. Managing risks inherent in the process is essential for reaping the rewards of this creative recruitment process. Practical implications The process described here can be emulated by other companies too. If executed well, rich dividends can be obtained at a modest cost. Companies can increase their engagement and brad equity at a low cost using this process. Originality/value The case study described here is unique in its approach toward recruitment and brand building.

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