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Article
Publication date: 1 September 1982

Electronic engine controls manufactured by Dowty & Smiths Industries Controls Ltd. (DSIC) have already completed more than 171 million flying hours. This includes experience…

Abstract

Electronic engine controls manufactured by Dowty & Smiths Industries Controls Ltd. (DSIC) have already completed more than 171 million flying hours. This includes experience gained by Concorde using a full authority electronic analogue system. The advent of microprocessor technology has now brought the benefits of digital control within the grasp of all military and civil engine manufacturers.

Details

Aircraft Engineering and Aerospace Technology, vol. 54 no. 9
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 April 1967

C.E.G. Payne

CONTROL SYSTEM PHILOSOPHY THE prime functions of any engine control system arc to provide stable speed governing and protection against overstressing the engine. Speed control is…

Abstract

CONTROL SYSTEM PHILOSOPHY THE prime functions of any engine control system arc to provide stable speed governing and protection against overstressing the engine. Speed control is usually effected by hydro‐mechanical or hydro‐electrical governing of the fuel flow; overstressing is normally avoided by limiting engine temperature, turbine entry temperature, pressure, overspeeding and acceleration.

Details

Aircraft Engineering and Aerospace Technology, vol. 39 no. 4
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 April 1986

K Robinson

THE first gas turbine engines with digital control are now entering service, replacing hydromechanical controls which still control the large majority of engines, reliably and…

Abstract

THE first gas turbine engines with digital control are now entering service, replacing hydromechanical controls which still control the large majority of engines, reliably and effectively.

Details

Aircraft Engineering and Aerospace Technology, vol. 58 no. 4
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 June 1944

Joseph Lowrey

THE period of 40 years since man first flew with the aid of an internal combustion engine has seen many changes in aircraft power units. Power has increased to an astonishing…

Abstract

THE period of 40 years since man first flew with the aid of an internal combustion engine has seen many changes in aircraft power units. Power has increased to an astonishing extent, yet reliability has also been obtained. Unfortunately, however, the amount of skill and knowledge required to obtain the best results from an engine can hardly be said to have decreased.

Details

Aircraft Engineering and Aerospace Technology, vol. 16 no. 6
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 19 August 2021

Yong Li, Feifei Han, Xinzhe Zhang, Kai Peng and Li Dang

In this paper, with the goal of reducing the fuel consumption of UAV, the engine performance optimization is studied and on the basis of aircraft/engine integrated control, the…

Abstract

Purpose

In this paper, with the goal of reducing the fuel consumption of UAV, the engine performance optimization is studied and on the basis of aircraft/engine integrated control, the minimum fuel consumption optimization method of engine given thrust is proposed. In the case of keeping the given thrust of the engine unchanged, the main fuel flow of the engine without being connected to the afterburner is optimally controlled so as to minimize the fuel consumption.

Design/methodology/approach

In this study, the reference model real-time optimization control method is adopted. The engine reference model uses a nonlinear real-time mathematical model of a certain engine component method. The quasi-Newton method is adopted in the optimization algorithm. According to the optimization variable nozzle area, the turbine drop-pressure ratio corresponding to the optimized nozzle area is calculated, which is superimposed with the difference of the drop-pressure ratio of the conventional control plan and output to the conventional nozzle controller of the engine. The nozzle area is controlled by the conventional nozzle controller.

Findings

The engine real-time minimum fuel consumption optimization control method studied in this study can significantly reduce the engine fuel consumption rate under a given thrust. At the work point, this is a low-altitude large Mach work point, which is relatively close to the edge of the flight envelope. Before turning on the optimization controller, the fuel consumption is 0.8124 kg/s. After turning on the optimization controller, you can see that the fuel supply has decreased by about 4%. At this time, the speed of the high-pressure rotor is about 94% and the temperature after the turbine can remain stable all the time.

Practical implications

The optimal control method of minimum fuel consumption for the given thrust of UAV is proposed in this paper and the optimal control is carried out for the nozzle area of the engine. At the same time, a method is proposed to indirectly control the nozzle area by changing the turbine pressure ratio. The relevant UAV and its power plant designers and developers may consider the results of this study to reach a feasible solution to reduce the fuel consumption of UAV.

Originality/value

Fuel consumption optimization can save fuel consumption during aircraft cruising, increase the economy of commercial aircraft and improve the combat radius of military aircraft. With the increasingly wide application of UAVs in military and civilian fields, the demand for energy-saving and emission reduction will promote the UAV industry to improve the awareness of environmental protection and reduce the cost of UAV use and operation.

Details

Aircraft Engineering and Aerospace Technology, vol. 93 no. 7
Type: Research Article
ISSN: 1748-8842

Keywords

Abstract

Details

The Handbook of Road Safety Measures
Type: Book
ISBN: 978-1-84855-250-0

Article
Publication date: 1 December 2000

P.J.H. Harris, B.A. Swain and K.P. Webb

Looks at an aircraft engine manufacturer’s use of an electronic system to enhance an existing product. During the early 1990s Rolls‐Royce studied the changing military market and…

3431

Abstract

Looks at an aircraft engine manufacturer’s use of an electronic system to enhance an existing product. During the early 1990s Rolls‐Royce studied the changing military market and compared its range of engines with potential business opportunities. The trainer/light combat powerplant was one area where there was potential to develop its position. As a result of the continuing success of the BAe Hawk and Boeing Goshawk aircraft and the expectation of new sales well into the next century, the decision was taken to launch a new version of the Adour engine. Thus in 1996 Rolls‐Royce launched the Adour 900, based on the current, well‐proven Mark 871, but offering thrust growth, improved life cycle costs and enhanced functionality. Central to the concept of the Adour 900 is a new Full Authority Digital Engine Controller with integrated Engine Health Monitoring. Examines the features of the FADEC and EHM System, showing how they have been tailored to meet the needs of a modern trainer aircraft without sacrificing retrofit capability. Attention is also given to the development process which had to ensure the demanding design targets were met within the cost and timescale constraints.

Details

Aircraft Engineering and Aerospace Technology, vol. 72 no. 6
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 1 September 1970

Accles & Pollock Ltd. of Oldbury, Worcestershire, a TI Steel Tube Division company, will be exhibiting a comprehensive range of precision steel tube and tubular products…

Abstract

Accles & Pollock Ltd. of Oldbury, Worcestershire, a TI Steel Tube Division company, will be exhibiting a comprehensive range of precision steel tube and tubular products, including plain, annularly convoluted and thin wall tube, at Farnborough.

Details

Aircraft Engineering and Aerospace Technology, vol. 42 no. 9
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 October 1966

THE Farnborough 1966 Show was at first glance much the same mixture as before, but the second glance was the more revealing. The participation in the flying display of European…

Abstract

THE Farnborough 1966 Show was at first glance much the same mixture as before, but the second glance was the more revealing. The participation in the flying display of European aircraft by no means swamped the air, even if the Italian verve took the acrobatic honours, but the theme of collaboration with other countries was to be found on practically every stand inside the exhibition tent. It was obvious that the smaller firms not directly involved in production agreements with other nations were very export conscious. The pacemaker of all this collaboration was of course the Concorde, only to be seen in model form, but rapidly taking shape at Toulouse and Filton, and many of the equipment manufacturers had Concorde hardware on display. Beagle announced the Pup, Britten‐Norman produced the production Islander, and Handley Page showed the Jetstream mock‐up. After many years of neglect, the industry is now taking an interest in the general aviation market. The P.1127 (R.A.F.) made its first appearance. The paradox of the P.1127 is that it is almost a part of Farnborough history, yet there is no other V/S.T.O.L. aircraft in the world that has but a fraction of the operating experience it has gained. Farnborough this year gave the impression of being more a serious trade show, and less a public spectacle. Sir Richard Smeeton, Director of the Society of British Aerospace Companies, reported that the exhibiting firms had received more serious business enquiries this year than ever before, and he forecast that 1968 would be a vintage year, which would see the appearance of the HS.801, the Concorde and Jaguar in the Farnborough skies. It is not possible to cover every exhibit shown at the Farnborough Show, but the following report describes a wide cross‐section beginning with the exhibits of the major airframe and engine companies.

Details

Aircraft Engineering and Aerospace Technology, vol. 38 no. 10
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 January 1969

The Aviation Division of the Dunlop Co. Ltd. (Engineering Group) is to install Dynex power units, designed and built by Applied Power (U.K.) Ltd., in the latest design of…

Abstract

The Aviation Division of the Dunlop Co. Ltd. (Engineering Group) is to install Dynex power units, designed and built by Applied Power (U.K.) Ltd., in the latest design of hydraulic production test rigs at the Division's Coventry factory. The company is completely re‐equipping its production test facilities by providing every rig with the higher pressures and flows which future trends in fluid technology will demand, and to ensure that each testing station is capable of handling service fluids currently in use, including kerosene, DTD 585, Skydrol, Lockheed 22 and Oronite.

Details

Aircraft Engineering and Aerospace Technology, vol. 41 no. 1
Type: Research Article
ISSN: 0002-2667

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