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Article
Publication date: 30 August 2013

Jiangtao Xu, Hui Qi, Weidong Chen and Xiande Wu

The purpose of this paper is to develop an attitude control strategy for the reusable boosted vehicle with large angle of attack, and to remove the cross coupling among…

Abstract

Purpose

The purpose of this paper is to develop an attitude control strategy for the reusable boosted vehicle with large angle of attack, and to remove the cross coupling among roll, pitch and yaw channels.

Design/methodology/approach

The coordinated gain scheduling control strategy consists mainly of two parts. First, initially ignoring dynamic coupling, single channel gain scheduling controller is designed based on linearized models, respectively. Second, with respect to main channel gain scheduling controller, coordinated scheduling controller is used to generate intentionally cross coupling to partly cancel inter‐channel cross coupling of reusable boosted vehicle.

Findings

A coordinated gain scheduling control strategy is presented, and no such analytical solution can be found for the reusable boosted vehicle.

Practical implications

The design idea of coordinated gain scheduling strategy is straightforward in physical concepts and has great value for engineering applications.

Originality/value

Coordinated gain scheduling control strategy is novel in that single channel gain scheduling design does not involve small perturbation linearization and coordinated channel is scheduled.

Details

Aircraft Engineering and Aerospace Technology, vol. 85 no. 5
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 6 September 2011

Pengxin Han, Rongjun Mu and Naigang Cui

The purpose of this paper is to address the flaws of traditional methods and fulfil the special fault‐tolerant re‐entry navigation requirements of reusable boost vehicle (RBV).

Abstract

Purpose

The purpose of this paper is to address the flaws of traditional methods and fulfil the special fault‐tolerant re‐entry navigation requirements of reusable boost vehicle (RBV).

Design/methodology/approach

A kind of improved estimation method based on strong tracking unscented Kalman filter (STUKF) is put forward. According to the fact that the traditional state χ2‐test‐based fault diagnosis method is incompetent to detect the signal point small jerks and slowly varying fault in the measurement, a kind of original fault diagnosis technology based on STUKF is used to check the working states of navigation sensors.

Findings

The comparisons with χ2‐test method under typical failure distributions validate the perfect state tracking and fault diagnosis performances of this improved method.

Practical implications

This kind of state estimation and fault diagnosis method could be used in the navigation and guidance systems for many kinds of aeronautical and astronautical vehicles.

Originality/value

A kind of novel strong tracking state estimation filter is used, and a kind of very effective fault diagnosis criterion is put forward for the navigation of RBV.

Details

Aircraft Engineering and Aerospace Technology, vol. 83 no. 5
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 3 October 2016

Michal Sobolewski, Norbert Grzesik, Zbigniew Koruba and Michal Nowicki

Nowadays, various methods of observation from unmanned aerial vehicles (UAV) are being widely developed. There are many ways of increasing the amount of information…

Abstract

Purpose

Nowadays, various methods of observation from unmanned aerial vehicles (UAV) are being widely developed. There are many ways of increasing the amount of information retrieved from captured material. Unfortunately, hardware solutions consume a lot of energy, which is unacceptable in UAV applications, as it can have direct impact on the observing time on UAV. Those kinds of problems have been identified during the development phase of stabilizing platform in Polish Research Space Centre in Warsaw. As a result of that fact, energy saving control methods have been implemented, which estimates quality of stabilization process for the observation-tracking device (OTD).

Design/methodology/approach

Mathematical model has been designed and validated with real-life experiments for the purpose of optimization of stabilization and control process. Two types of controlling algorithms have been implemented: linear quadratic regulator and proportional derivative method for driving the mechanism. Based on numerical simulations of the mechanical model being controlled by the mentioned driver, it was possible to define membership functions. After the process of defuzzification, the controller predicts quality of stabilization under defined environmental working conditions.

Findings

An autonomous energy saving system has been created that can be implemented in many applications, where environmental conditions may change significantly.

Practical implications

To test the proposed fuzzy controller, OTD has been chosen as an example object of application. It is a mechanical platform which houses the optical observation system. It is designed to provide the best working conditions during flight.

Originality/value

That kind of decision-making unit has never been implemented before during observations which were carried out during flying of an object. That innovative controller should bring significant energy consumption savings.

Details

Aircraft Engineering and Aerospace Technology, vol. 88 no. 6
Type: Research Article
ISSN: 1748-8842

Keywords

Expert briefing
Publication date: 17 June 2015

The implications of SpaceX's entry into government launches.

Article
Publication date: 1 April 1981

GEORGE MERRICK

Two decades ago, the space age dawned, and we were awakened to a realm of technological possibilities beyond any we had imagined. Since that time, we have linked…

Abstract

Two decades ago, the space age dawned, and we were awakened to a realm of technological possibilities beyond any we had imagined. Since that time, we have linked continents with communication satellites, sent probes to other planets, and seen men on the moon. And, although we have made achievements that were almost inconceivable 30 years ago, we are still far from realising our potential for a future in space.

Details

Aircraft Engineering and Aerospace Technology, vol. 53 no. 4
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 8 February 2016

Antonio Mazzaracchio

This paper aims to address a significant issue related to the coupled and uncoupled treatment of the thermal and dynamic problems in the optimization of aeroassisted…

60

Abstract

Purpose

This paper aims to address a significant issue related to the coupled and uncoupled treatment of the thermal and dynamic problems in the optimization of aeroassisted orbital maneuvers and the simultaneous optimal sizing of the associated heat shields. The literature generally focuses on decoupled treatments that reduce the computational load; in this manner, consequently, a decrease in the representativity of the solution manifests. The general operating mode first optimizes the trajectory and subsequently defines the optimal heat shield design based on that trajectory.

Design/methodology/approach

This paper analyzes the impact of both treatments on the evaluation of the convenience of an aeroassisted maneuver with respect to an equivalent purely propulsive exoatmospheric maneuver in relation to the achievable total mass savings of the propellant and the heat shield. Two case studies are analyzed via an optimization methodology that references genetic algorithms: the first case study is related to an aerobraking maneuver and the second case study is related to an orbital plane change.

Findings

The results demonstrate that the adoption of decoupling produces conservative solutions, i.e. unfavorable estimates, with a lower level of convenience of the aeroassisted technique compared to equivalent purely propulsive exoatmospheric maneuvers.

Originality/value

This type of analysis can provide an appropriate discernment criterion for the selection of the modus operandi based on the available computational power and the desired level of representativity.

Details

World Journal of Engineering, vol. 13 no. 1
Type: Research Article
ISSN: 1708-5284

Keywords

Book part
Publication date: 17 September 2020

Dawn Iacobucci, Marcelo L. D. S. Gabriel, Matthew J. Schneider and Kavita Miadaira Hamza

This chapter reviews marketing scholarship on environmental sustainability. The literature covers several themes of both consumer behavior and firm-level topics. Consumer…

Abstract

This chapter reviews marketing scholarship on environmental sustainability. The literature covers several themes of both consumer behavior and firm-level topics. Consumer issues include their assessment of efficacy and the extent to which they are aware and sensitive to environmental issues. Numerous interventions and marketing appeals for modifying attitudes and behaviors have been tested and are reported. Consumers and business managers have both been queried regarding attitudes of recycling and waste. Firm-level phenomena are reflected, including how brand managers can signal their green efforts to their customers, whether doing so is beneficial, all in conjunction with macro pressures or constraints from industry or governmental agencies. This chapter closes with a reflection on the research.

Details

Continuing to Broaden the Marketing Concept
Type: Book
ISBN: 978-1-78754-824-4

Keywords

Article
Publication date: 6 August 2020

Rupesh Kumar, Ajay Jha, Akhil Damodaran, Deepak Bangwal and Ashish Dwivedi

The purpose of this study is to investigate the challenges before India for electric vehicle (EV) adoption by 2030. The study further looks into the measures taken by the…

1348

Abstract

Purpose

The purpose of this study is to investigate the challenges before India for electric vehicle (EV) adoption by 2030. The study further looks into the measures taken by the Government of India (GOI) to promote research and development in EV sector and what is yet to be done.

Design/methodology/approach

In the present study, the challenges are identified allied to the commercialization of EVs in India. The data are collected, analyzed and compiled through secondary sources. The secondary data give a concise insight and comprehensive information regarding what is occurring around the globe as well as in the Indian context. Further, the challenges are investigated through a focus group study consisting of 11 participants from industry and academia.

Findings

The findings from the study are the critical roles of sharing economy and public utilities in the promotion of EV adoption, given the high cost of EV, lack of infrastructure and poor purchasing power of Indian customers. The sharing economy perspective provides various opportunities for the government to manage the resources (electric-powered transport system) optimally. Further, the study compares the global perspective in assigning the target figures.

Research limitations/implications

The study highlights the facilitating role of the shared format in EV technology promotion but ignores the hurdles that can come in its implementations. Also, the focus group study has its limitation as it relies more on participants' perceptions and opinions.

Originality/value

The present study assists GOI and various stakeholders in having a realistic plan rather than daydreaming with overambitious goals. The diffusion of technology as a shared format (especially in the context of EV) has not been academically approached in the past literature.

Details

Management of Environmental Quality: An International Journal, vol. 32 no. 1
Type: Research Article
ISSN: 1477-7835

Keywords

Article
Publication date: 1 March 1995

Haw‐Jan Wu and Steven C. Dunn

Logistics can be an indispensable part of integrated environmentalmanagement programmes because of its cross‐functional nature. Providesan overview of environmentally…

25461

Abstract

Logistics can be an indispensable part of integrated environmental management programmes because of its cross‐functional nature. Provides an overview of environmentally responsible logistics activities and their implications for corporate management. Also examines logistics functions in the context of the corporate value chain and identifies various environmental decision points. With environmental impact considered, many traditional trade‐off decisions need to be re‐evaluated. Provides examples in which innovative and environmentally‐friendly logistics ideas are used. Also discusses two system‐wide logistics elements, transportation and reverse logistics, that can have a profound impact on a firm′s environmental protection programme. Concludes that logistics managers can make environmentally responsible decisions that are coherent with corporate goals and objectives.

Details

International Journal of Physical Distribution & Logistics Management, vol. 25 no. 2
Type: Research Article
ISSN: 0960-0035

Keywords

Expert briefing
Publication date: 12 September 2016

The September 1 blast at the Cape Canaveral launching site is a setback for Musk's goal of breaking open the market for government and private sector space launch…

Details

DOI: 10.1108/OXAN-DB213544

ISSN: 2633-304X

Keywords

Geographic
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