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Article
Publication date: 15 August 2016

Guilherme Boulhosa Rodamilans, Emília Villani, Luís Gonzaga Trabasso, Wesley Rodrigues de Oliveira and Ricardo Suterio

This paper aims to propose an evaluation method to compare two different Human–Robot Interaction (HRI) solutions that can be used for on-line programming in an industrial context…

Abstract

Purpose

This paper aims to propose an evaluation method to compare two different Human–Robot Interaction (HRI) solutions that can be used for on-line programming in an industrial context: a force guidance system and the traditional teach pendant operation.

Design/methodology/approach

The method defines three evaluation criteria (agility, accuracy and learning) and describes an experimental approach based on the analysis of variance to verify the performance of guidance systems according to these criteria. This method is used in this paper to compare the traditional teach pendant interface with an implementation of a force guidance system based on the use of an external force/torque sensor.

Findings

The application of the proposed method to an off-the-shelf industrial robot shows that the force guidance system has a better performance according to the agility criterion. Both solutions have a similar performance for the accuracy criterion, with a limit of about 2 mm in the achieved position accuracy. Regarding the learning criterion, the authors cannot affirm that any of the methods has an improved agility when the operator repeats the tasks.

Practical implications

This work supports the selection of guidance systems to be used in on-line programming of industrial applications. It shows that the force guidance system is an option potentially faster than the teach pendant when the required positioning accuracy is greater than 2 mm.

Originality/value

The new method proposed in this paper can be applied to a large range of robots, not being limited to commercial available collaborative robots. Furthermore, the method is appropriate to accomplish further investigations in HRI not only to compare programming methods but also to evaluate guidance systems approaches or robot control systems.

Details

Industrial Robot: An International Journal, vol. 43 no. 5
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 26 July 2013

Mohammad H. Sadraey

The purpose of this paper is to design an integrated guidance and control design for a formation flight of four unmanned aerial vehicles to follow a moving ground target.

Abstract

Purpose

The purpose of this paper is to design an integrated guidance and control design for a formation flight of four unmanned aerial vehicles to follow a moving ground target.

Design/methodology/approach

The guidance law is based on the line‐of‐sight. The control is optimal. The guidance law is integrated with the optimal control law and is applied to a linear dynamic model.

Findings

The theoretical results are supported by the numerical simulations that illustrate a coordinated encirclement of a ground maneuvering target.

Research limitations/implications

A linear dynamic UAV model and a liner engine model were employed.

Practical implications

This is expected to provide efficient coordination technique required in many civilian circular formation UAV applications; also the technique can be used to provide a safe environment required for the civil applications.

Social implications

The research will facilitate the deployment of autonomous unmanned aircraft systems in various civilian applications such as border monitoring.

Originality/value

The research addresses the challenges of coordination of multiple unmanned aerial vehicles in a circular formation using an integrated optimal control technique with line‐of‐sight guidance.

Details

International Journal of Intelligent Unmanned Systems, vol. 1 no. 3
Type: Research Article
ISSN: 2049-6427

Keywords

Article
Publication date: 1 September 2006

Chaoyong Li, Wuxing Jing, Hui Wang and Zhiguo Qi

To study the application of three‐dimensional differential geometric (DG) guidance commands to a realistic missile defense engagement, and the application of the Newton's…

Abstract

Purpose

To study the application of three‐dimensional differential geometric (DG) guidance commands to a realistic missile defense engagement, and the application of the Newton's iterative algorithm to DG guidance problems.

Design/methodology/approach

The classical differential geometry theory is introduced firstly to transform all the variables in DG guidance commands from an arc length system to the time domain. Then, an algorithm for the angle‐of‐attack and the sideslip angle is developed by assuming the guidance curvature command and guidance torsion command equal to its corresponding value of current trajectory. Furthermore, Newton's iteration is utilized to develop iterative solution of the stated algorithm and the two‐dimensional DG guidance system so as to facilitate easy computation of the angle‐of‐attack and the sideslip angle, which are formulated to satisfy the DG guidance law.

Findings

DG guidance law is viable and effective in the realistic missile defense engagement, and it is shown to be a generalization of gain‐varying proportional navigation (PN) guidance law and performs better than the classical PN guidance law in the case of intercepting a maneuvering target. Moreover, Newton's iterative algorithm has sufficient accuracy for DG guidance problem.

Originality/value

Provides further study on DG guidance problem associated with its iterative solution.

Details

Aircraft Engineering and Aerospace Technology, vol. 78 no. 5
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 1 December 1961

D.J. Ritchie

PHOTOGRAPHIC details of various aircraft and missiles recently released in conjunction with the Soviet air show at Tushino Airport on July 9, 1961, has provided a basis for the…

Abstract

PHOTOGRAPHIC details of various aircraft and missiles recently released in conjunction with the Soviet air show at Tushino Airport on July 9, 1961, has provided a basis for the start of an evaluation of Soviet air‐to‐air rocket weapons. These pictorial data, coupled with Russian textbooks, as well as evidence of Soviet interest in the guided‐missile work of the Western Powers, indicated by the material that has been translated from English into Russian,1 has led to this brief evaluation of their work in this field.

Details

Aircraft Engineering and Aerospace Technology, vol. 33 no. 12
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 3 April 2017

Tien-Wen Sung and Ting-Ting Wu

Learners were provided with personalized and adaptive articles in a dynamic real-time manner. This study aims to improve learners’ interest in learning English and motivate them…

Abstract

Purpose

Learners were provided with personalized and adaptive articles in a dynamic real-time manner. This study aims to improve learners’ interest in learning English and motivate them through an appropriate e-book assistance mechanism, thus increasing their English reading–comprehension skills.

Design/methodology/approach

In addition to their general auxiliary functions, e-books were designed to provide other relevant auxiliary functions to meet the English reading–learning requirements. The e-book was also equipped with a personalized reading guidance and assistance mechanism for conducting systematic assessments and calculations on the basis of the learner’s reading comprehension skills, article difficulty and difficulty stratification and connections between articles.

Findings

The personalized reading guidance and assistance strategy, which provided articles in line with the learners’ personal abilities and presented the articles in a correlated method, facilitated learners’ progressive learning and improved their reading–comprehension abilities. Learners’ confidence and satisfaction toward English reading can be improved effectively through adaptive guidance.

Originality/value

A real-time and dynamic reading guidance strategy was established in this study by considering the learner’s reading–comprehension skills, article difficulty and difficulty stratification and the connections between articles.

Details

The Electronic Library, vol. 35 no. 2
Type: Research Article
ISSN: 0264-0473

Keywords

Article
Publication date: 24 September 2021

Christopher S. Chapman, Anja Kern, Aziza Laguecir, Gerardine Doyle, Nathalie Angelé-Halgand, Allan Hansen, Frank G.H. Hartmann, Céu Mateus, Paolo Perego, Vera Winter and Wilm Quentin

The purpose is to assess the impact of clinical costing approaches on the quality of cost information in seven countries (Denmark, England, France, Germany, Ireland, the…

Abstract

Purpose

The purpose is to assess the impact of clinical costing approaches on the quality of cost information in seven countries (Denmark, England, France, Germany, Ireland, the Netherlands and Portugal).

Design/methodology/approach

Costing practices in seven countries were analysed via questionnaires, interviews and relevant published material.

Findings

Although clinical costing is intended to support a similar range of purposes, countries display considerable diversity in their approaches to costing in terms of the level of detail contained in regulatory guidance and the percentage of providers subject to such guidance for tariff setting. Guidance in all countries involves a mix of costing methods.

Research limitations/implications

The authors propose a two-dimensional Materiality and Quality Score (2D MAQS) of costing systems that can support the complex trade-offs in managing the quality of cost information at both policy and provider level, and between financial and clinical concerns.

Originality/value

The authors explore the trade-offs between different dimensions of the quality (accuracy, decision relevance and standardization) and the cost of collecting and analysing cost information for disparate purposes.

Details

Journal of Public Budgeting, Accounting & Financial Management, vol. 34 no. 2
Type: Research Article
ISSN: 1096-3367

Keywords

Article
Publication date: 1 January 1964

IN covering British activities in the inertial guidance field, it is appropriate to include a brief picture of developments in the historical sense so that British achievements…

Abstract

IN covering British activities in the inertial guidance field, it is appropriate to include a brief picture of developments in the historical sense so that British achievements can be seen in perspective especially with regard to the state‐of‐the‐art in the United States. We will also deal with the application of inertial navigation systems to the civil field for, although at the moment every production inertial quality system in service is being operated in a military rôle, civil aviation is on the threshold of adopting inertial techniques.

Details

Aircraft Engineering and Aerospace Technology, vol. 36 no. 1
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 September 1957

A.B. Schwartz, S. Malick and J.R. Friesen

THE experimental determination of the moment of inertia of a body is frequently required to confirm a calculated value or to eliminate the tedious work involved in the…

Abstract

THE experimental determination of the moment of inertia of a body is frequently required to confirm a calculated value or to eliminate the tedious work involved in the calculation. This is normally done by integrating the body into a vibrating system, such as a pendulum.

Details

Aircraft Engineering and Aerospace Technology, vol. 29 no. 9
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 15 May 2009

S.H. Pourtakdoust, F. Pazooki and M. Fakhri Noushabadi

The purpose of this paper is to devise a new approach to synthesize closed‐loop feedback guidance law for online thrust‐insensitive optimal trajectory generation utilizing neural…

Abstract

Purpose

The purpose of this paper is to devise a new approach to synthesize closed‐loop feedback guidance law for online thrust‐insensitive optimal trajectory generation utilizing neural networks.

Design/methodology/approach

The proposed methodology utilizes an open‐loop variational formulation that initially determines optimal launch/ascent trajectories for various scenarios of known uncertainties in the thrust profile of typical solid propellant engines. These open‐loop optimized trajectories will then provide the knowledge base needed for the subsequent training of a neural network. The trained network could eventually produce thrust‐insensitive closed‐loop optimal guidance laws and trajectories in flight.

Findings

The proposed neuro‐optimal guidance scheme is effective for online closed‐loop optimal path planning through some measurable and computable engine and flight parameters.

Originality/value

Determination of closed‐loop optimal guidance law for non‐linear dynamic systems with uncertainties in system and environment has been a challenge for researchers and engineers for many years. The problem of steering a solid propellant driven vehicle is one of these challenges. Even though a few researchers have worked in the area of non‐linear optimal control and thrust‐insensitive guidance, this paper proposes a new strategy for the determination of closed‐loop online thrust insensitive guidance laws leading to optimal flight trajectories for solid propellant launch and ascent vehicles.

Details

Aircraft Engineering and Aerospace Technology, vol. 81 no. 3
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 8 December 2020

Roopa Ravish and Shanta Rangaswamy

The purpose of this study is to provide real-time route guidance within city to help commuters.

Abstract

Purpose

The purpose of this study is to provide real-time route guidance within city to help commuters.

Design/methodology/approach

In urban areas to avoid road congestion and to reach the destination on time, intelligent transport system (ITS) utilizes recent advanced technology. To support this, existing route guidance system (RGS) suggests alternative route to commuters. However, ITS requires a system which suggests the alternative route along with the mode of transport such as public, private, taxi services etc. Integrated mode of transport (IMT) implemented in this paper guides the commuters of urban area with the best mode of transport. Inputs to our IMT predictive model are the commuter's choice of (1) minimum travel time (2) minimum cost (3) flexible route and (4) less traffic intensity along with source and destination locations. Based on these user inputs, IMT predictive model suggests optimal mode of transport. In this paper to implement the IMT model, we have considered the transport facility available in Bangalore, a city in India. The city has metro train, bus and taxi services available to the commuters. Implementation is divided into two parts. In the first part, the model checks for the end-to-end connectivity/availability of metro train facility. If metro train connectivity exists, the model concludes this as the best mode of travel. In the second part, for the routes which are not connected by metro train, the optimal mode of transport through road network will be suggested. In the first part, to check the existence of metro train along the routes between source and destination, location-IQ API is used. In the later part, to suggest transport along the road network, Q-learning algorithm of reinforcement learning technique is used.

Findings

The findings are the predictive model algorithm to find the best mode of transfer and reinforcement model used in real time route guidance system.

Originality/value

This is a new Idea, not proposed in any research work.

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