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Article
Publication date: 14 October 2013

Karol Rydlo, Pawel Rzucidlo and Peter Chudy

The presented paper aims to describe the general idea, simulations and prototyping process of an assisting flight control system (FCS) for light sport aircraft (LSA). The proposed…

316

Abstract

Purpose

The presented paper aims to describe the general idea, simulations and prototyping process of an assisting flight control system (FCS) for light sport aircraft (LSA). The proposed FCS framework is intended to simplify piloting, reduce pilot workload, and improve system's reliability and handling qualities of manual flying.

Design/methodology/approach

Assisting flight control strategy integrates mechanical and digital FCS into a synergic platform, combining the high reliability of mechanical controls with the computation and actuation power introduced through a single line digital FCS. Concepts drawn from classical control theory along with flight envelope protection algorithms have been used throughout the design of the flight control laws. A prototype of the assisting FCS has been subjected to validation trials during series of hardware-in-the-loop simulations.

Findings

Despite controversies between the pilots' perception of a modern aircraft and limitations imposed by the legacy airworthiness codes, it has been shown that a pilot assisting and workload reducing control system can be successfully implemented on board of a LSA while satisfying the expectations on a state-of-the-art equipment meeting required level of safety defined by the current legislation.

Research limitations/implications

A transition between specific flight modes as well as nonlinearities in the FCS may lead to unfavorable and unpredictable forms of aircraft-pilot interactions. The number of accessible flight control modes should be therefore limited to the most significant ones.

Practical implications

Sport aircraft are mostly flown by a single pilot, who could benefit from the pilot assisting FCS as the system has the potential to supervise the aircraft's safe operation in various flight conditions.

Originality/value

Introducing an assisting FCS on board of a LSA through an innovative approach which utilizes hidden and unused resources of modern digital automatic FCSs while respecting the limitations imposed through the weight and cost sensitive nature of the LSA market.

Details

Aircraft Engineering and Aerospace Technology, vol. 85 no. 6
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 4 September 2009

Peter Chudý, Andrzej Tomczyk and Pawel Rzucidlo

The purpose of this paper is to describe the general idea, design, and implementation of control system for general aviation aircraft which reduces pilot workload.

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Abstract

Purpose

The purpose of this paper is to describe the general idea, design, and implementation of control system for general aviation aircraft which reduces pilot workload.

Design/methodology/approach

Proposed indirect flight control system framework is intended to simplify piloting, reduce pilot workload, and allow low‐end general aviation aircraft to operate under deteriorated meteorological conditions. Classical control theory is used for the design of the flight control laws. Although not inherently robust, controllers with classical control logic are made sufficiently stable using a correct and updated controller structure.

Findings

Despite controversies between perception of a modern manned aerial vehicle and limitations imposed by legacy airworthiness codes it is shown that a pilot workload reducing system can be successfully implemented onboard of a low‐end general aviation aircraft.

Research limitations/implications

Hi‐level control laws and optimization of handling qualities can lead to unfavourable and unpredictable forms of man‐machine interactions, e.g. pilot‐induced oscillations.

Practical implications

General aviation aircraft are mostly flown by a single pilot, who could benefit from an intelligent system or “virtual copilot” assisting in or supervising the aircraft's safe operation under any conditions. Aircraft with this capability represents a next step in the evolution that might ultimately lead to trajectory‐based free‐flight concept of aircraft operations.

Originality/value

The paper introduces a safety enhanced digital flight control system on board small general aviation aircraft.

Details

Aircraft Engineering and Aerospace Technology, vol. 81 no. 5
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 1 March 1994

John Paul Chudy

This article analyzes the economic policy reform experience of three less developed countries (LDCs) during the 1980s -- Costa Rica, Ghana and Jamaica -- in three policy areas…

71

Abstract

This article analyzes the economic policy reform experience of three less developed countries (LDCs) during the 1980s -- Costa Rica, Ghana and Jamaica -- in three policy areas, exchange rate, trade, and agriculture. A political management model that shows how strong but skillful political leadership is as critical to policy reform success as is economic content is used for the analysis. The model proposes that government officials have to make policy reforms politically feasible if the reforms are to succeed. The assumption is that successful decision makers will take three kinds of political initiatives: (1) appeal to national sentiments, (2) seek the collaboration of affected interest groups, and (3) manage external actors. The article provides evidence that the economic perfomance of three countries correlated with the degree of political initiative taken. Costa Rican policy elites demonstrated the highest level of 1initiative. Ghana ranked second in political management, and Jamaica ranked third. The success of some LDCs also provides instructive experience for the Clinton Administration as it moves forward with a variety of policy reforms.

Details

Journal of Public Budgeting, Accounting & Financial Management, vol. 6 no. 4
Type: Research Article
ISSN: 1096-3367

Available. Content available
Book part
Publication date: 8 May 2019

Abstract

Details

African Economic Development
Type: Book
ISBN: 978-1-78743-784-5

Available. Open Access. Open Access
Article
Publication date: 7 April 2023

Fei Ping Por and Balakrishnan Muniandy

To continue to stay relevant in the era of Industry Revolution 4.0 (IR4.0) alongside the unprecedented disruption of COVID-19, the importance of lifelong learning is indisputable…

707

Abstract

Purpose

To continue to stay relevant in the era of Industry Revolution 4.0 (IR4.0) alongside the unprecedented disruption of COVID-19, the importance of lifelong learning is indisputable though this concept has existed for decades. In this context, open and distance learning (ODL) institutions are urged to re-think and re-design their online learning support systems that inculcate self-regulated lifelong learning (SR3Ls) in their learners to be adaptable and resilient for the post-pandemic economy. The purpose of this paper is to develop a SR3Ls model, namely SR3Ls model by utilising the collective opinions of a panel of experts to determine the key domains and attributes.

Design/methodology/approach

A 2-round Delphi consensus study was conducted with 39 experts from five countries. The mean, standard deviation (SD), inter-quartile range (IQR) and the ratio of experts assigned score of 4 or greater were used as the basis of consensus assessment with criteria set at mean = 3.0, SD = 1.5, IQR = 1, ratio on score 4 or greater at = 75%. The questionnaire consisted of 5-point Likert-type scale rating the importance level of each attribute combined with open-ended questions.

Findings

This paper presented the findings of the first round of Delphi consensus study. For the first round, the experts were asked to evaluate 31 key attributes of SR3Ls model under five domains. The findings revealed that there were five key attributes to be eliminated from the list, while there were seven attributes identified as the key attributes with highest consensus. There were additional attributes suggested by the Delphi panel to be added in the second round of evaluation.

Originality/value

This international consensus-based SR3Ls model serves as an important benchmark for ODL institutions across the regions in developing meaningful and relevant online learning support systems for their learners to adopt SR3Ls attributes in order to meet the dynamic market demands.

Details

Asian Association of Open Universities Journal, vol. 18 no. 1
Type: Research Article
ISSN: 1858-3431

Keywords

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