ISSN:0020-7179    

DOI:10.1080/00207179408923066

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Projections for aeronautical development in the near future emphasize strong dynamic interactions among aircraft technical disciplines and a promise of dynamic systems integration as a central feature in the creation of future aircraft. This paper examines these trends using two aircraft types as examples. The first example is a large helicopter that exhibits an interacting array of structural, rotor dynamic, control system and human pilot dynamics. The second example is a hypersonic aircraft, such as the National AeroSpace Plane.

ISSN:0020-7179    

DOI:10.1080/00207179408923067

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

A comprehensive use of eigenstructure assignment design methodology is presented. The implementation of this technique, in the context of advanced flight controls, is shown to be broad and flexible enough to accommodate a host of practical situations such as: constant output feedback, constrained output feedback, or output feedback with dynamic compensation for both continuous and discrete systems. In addition, the design of robust closed loop control systems is reviewed. Numerical examples corresponding to each case are presented in the context of flight controls.

ISSN:0020-7179    

DOI:10.1080/00207179408923068

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Quantitative feedback theory (QFT) technique has emerged as a powerful multivariable control system design method. This design method addresses real-world problems with structured plant parameter uncertainties. The paper provides the control community with an overview and the basic mathematical concepts of the QFT technique. The solutions to some real-world flight control problems and a very powerful design tool (QFT CAD package) are presented. One of these solutions was successfully implemented and flight tested.

ISSN:0020-7179    

DOI:10.1080/00207179408923069

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

This paper describes nonlinear dynamic inversion as an alternative design method for flight controls. The method is illustrated with super-manoeuvring control laws for the F-18 high angle-of-attack research vehicle.

ISSN:0020-7179    

DOI:10.1080/00207179408923070

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Several applications and adaptations of multivariable control theory for aircraft control law developments are described. Applications include solution of a lateral oscillation problem in the Boeing 767 autopilot, a longitudinal control law giving excellent handling qualities for stable or unstable airframes, and a high-agility fighter giving superior flying qualities up to 90°angle of attack. Adaptations of control theory include meeting the Gibson longitudinal flying qualities criterion, a unified application of linear quadratic design theory, and application of the structured singular value. The paper also includes a discussion of the Boeing software tools used for model building, control analysis and design.

ISSN:0020-7179    

DOI:10.1080/00207179408923071

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

An overview is presented of the characteristics of the Airbus fly-by-wire control laws, systems, certification and development methods. First, the general structure of the longitudinal and lateral laws, as well as the architecture of the system transmitting the pilot commands are presented. Next, the design, development and validation procedures used on the A320/A321 programme are described, together with the main certification items. The peculiarities of the A340 control laws and improvements to the design methods experienced during this programme conclude this overview.

ISSN:0020-7179    

DOI:10.1080/00207179408923072

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The flight control system of the Lavi light multimission fighter is described. The control laws design philosophy is given along with the control laws development, the flying qualities requirements and the final structure of the pitch axis (DFCS). The simulation phase is covered along with special control laws features. The question ‘how does the Lavi fly?’ is addressed. Problems uncovered during flights, and solutions found, are detailed and the flying qualities data are given. Finally the programme status is explained.

ISSN:0020-7179    

DOI:10.1080/00207179408923073

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The Experimental Aircraft Programme aimed to demonstrate technologies applicable to a future combat aircraft. One of these technologies was active control technology, necessary for the flight control system of a highly unstable airframe. This paper outlines the development of the control laws utilized in this project and relates the very positive experience gained through the flight demonstration. Most significant of the capabilities were agile carefree handling (incorporating incidence limiting,Nzlimiting and departure prevention) and a total lack of pilot induced oscillation tendency.

ISSN:0020-7179    

DOI:10.1080/00207179408923074

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Two X-29A aircraft were flown at the NASA Dryden Flight Research Facility over a period of eight years. The airplanes' unique features are the forward-swept wing, variable incidence close-coupled canard and highly relaxed longitudinal static stability (up to 35% negative static margin at subsonic conditions). This paper describes the primary flight control system and significant modifications made to this system, flight test techniques used during envelope expansion, and results for the low and high angle-of-attack programmes. Throughout the paper, lessons learned will be discussed to illustrate the problems associated with the implementation of complex flight control systems.

ISSN:0020-7179    

DOI:10.1080/00207179408923075

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor