Curvilinear Projection Developments

Kelley, Henry J.; Lefton, Leon; Johnson, I. L.

doi:10.2514/3.55746

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…References [5,14] discuss some of these developments and their implementation for numerical computations. The variable-metric proiection treatment of -multiple inequality constraints ls described in these papers.…”

Section: Optimization Technique Optimization Is Concerned With Methodmentioning

confidence: 99%

Aircraft Cruise Performance Optimization using Chattering Controls

Bhardwaj

Kelley

Cliff

1987

IFAC Proceedings Volumes

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Aerospace Engineering (ABSTRACT)Aircraft Cruise Performance is examlned by using energy-state modelling to investigate fuel-range·optimal trajectories. Chattering controls are considered appropriate when the hodograph is non-convex.Classical steady-state cruise, simple chattering-cruise and the extended chattering-cruise models are studied as constrained parameter-optimization problems. The term "extended chattering" refers to vehicle system modelling extended to maintaln vertical equilibrium only on the average. Numerical solution is obtained using a variable-metric gradient-proiection algorithm and computational results are presented for three different aircraft.This study shows that simple chattering cruise for certain specific energies can result in substantial fuel savings over classical steady-state cruise. However extended chattering cruise results in only marginal fuel savings when compared to simple chattering cruise.

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Section: Optimization Technique Optimization Is Concerned With Methodmentioning

confidence: 99%

Aircraft Cruise Performance Optimization using Chattering Controls

Bhardwaj

Kelley

Cliff

1987

IFAC Proceedings Volumes

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“…This is discussed in Chapter 6. 6 A computational study was done to assess the effectiveness of the active-set strategy proposed in this study in comparison to some existing strategies.…”

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confidence: 99%

An active‐constraint logic for non‐linear programming

Das

Cliff

Kelley

1984

Optim Control Appl Methods

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Active‐constraint logic for non‐linear programming processes is sought such that the constraints in the active set possess positive projection multipliers and the resulting step does not violate the linear approximations to any of the constraints satisfied as equalities but considered inactive. Active‐constraint logic which has the desired properties is given for the cases of two and three constraints. For the general case featuring more than three constraints satisfied as equalities, an active‐set logic is suggested. The efficiency of the proposed logic is tested computationally on some quadratic programming problems in comparison with three existing active‐set strategies.

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