• Corpus ID: 8498271

Application of Modern Synthesis to Aircraft Control : Three Case Studies

  title={Application of Modern Synthesis to Aircraft Control : Three Case Studies},
  author={Dagfinn Gangsaas and Kevin R. Bruce and James D. Blight},
The role of feedback control in the solution of aircraft stability and control problems is discussed. It is argued that this role is becoming more and more important and is a key to meeting performance objectives for new aircraft. .4s a consequence, the control engineer must develop control laws for applications with many, sometimes conflicting, control objectives and stringent safety requirements. In the past, predominantly classical sy-nthesis techniques have been used in industry to develop… 

Switched System Stability and Stabilization for Fighter Aircraft

Simulations show that a switched state-feedback controller provides better tracking than a simple LQR feedback gain, and less conservative tools, based on dwell-time analysis, are introduced and extended for the computation of L2-gain estimates.

Longitudinal stability and control augmentation with robustness and handling qualities requirements using the two degree of freedom controller

This paper presents a practical design of longitudinal stability and control augmentation system (SCAS) using a two degree of freedom (TDOF) controller. It is based on the linear quadratic regulator

Evolution of Flying Qualities Analysis: Problems for a New Generation of Aircraft

A number of challenges in the development and application of flying qualities criteria for modern aircraft are addressed in this dissertation: a capstone course in flight mechanics teaching flight techniques and featuring a motion-based flight simulator was implemented and evaluated and its effectiveness in promoting an understanding of key flight mechanics concepts is presented.

Resolving actuator redundancy - optimal control vs. control allocation

ℋ∞-controller order reduction for active suspension system

A ℋ∞-controller of an active suspension system is designed and then, a frequency weighted reduction method is used to perform an order reduction of the obtained controller.

Guaranteed cost control for uncertain nonlinear quadratic systems

This paper proposes a novel control design methodology which enables to find a state feedback controller guaranteeing for the closed-loop system the local asymptotic stability of the zero equilibrium point and the inclusion of a given polytopic region into the domain of attraction of thezero equilibrium point.

Tuning controllers against multiple design requirements

  • P. Apkarian
  • Computer Science
    2013 American Control Conference
  • 2012
A new technique for tuning arbitrarily structured controllers against multiple control requirements, implemented in the MATLAB-based tool SYSTUNE which can be regarded as an extension of HINFSTRUCT from the Robust Control Toolbox.

Controller Design via Nonsmooth Multidirectional Search

An algorithm which combines multidirectional search (MDS) with nonsmooth optimization techniques to solve difficult problems in automatic control and is efficient when small and medium size controllers for plants with large state dimension are sought.

Autonomous Control Modes and Optimized Path Guidance for Shipboard Landing in High Sea States

Abstract : Landing a rotorcraft on a moving ship deck and under the influence of the unsteady ship airwake is extremely challenging. In high sea states, gusty conditions, and a degraded visual



A design technique for linear multivariable feedback systems

A systematic approach is developed for the design of linear multivariable feedback control systems based on a manipulation of the set of frequency-conscious eigenvalues and eigenvectors of an open-loop transfer-function matrix using an approximately-commutative controller.

Frequency-shaped cost functionals - Extension of linear-quadratic-Gaussian design methods

The linear-quadratic-Gaussian method for feedback control design is extended to include frequency-shaped weighting matrices in the quadratic cost functional. This extension provides a means to meet

Wind models for flight simulator certification of landing and approach guidance and control systems

Analytic and probabilistic descriptions of low-altitude mean wind and turbulence have been investigated and a description selected. The effects of wind and turbulence on aerodynamics and aircraft

Control system synthesis by Root Locus method

  • W. Evans
  • Physics
    Electrical Engineering
  • 1950
THE ROOT LOCUS method solves the problem of finding the roots of the characteristic equation by an extension of concepts now associated with the frequency-response method. The roots describe the

airplane,“ AIAA Guidance Contr

  • 1984

Multivariable design techniques based on singular value generalizations of classical control

  • Optimal Filtering

Bruce received the B.S. degree in mechanical engineering

  • 1973

Gangsaas, “Improvement of the 767 lateral autopilot using optimal control design techniques,” presented at the AIAA Guidance and Control Conf

  • Seattle, WA, Aug
  • 1984

on spacecraft control and Tektronix, Inc., Beaverton, OR, on electronic circuit design

  • 1978