Progress in the development of guidance strategies for the landing flare manoeuvre using tau‐based parameters

Jump, Michael; Padfield, Gareth D.

doi:10.1108/17488840610639618

Cited by 11 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Table A1, the dressing '^' indicates that the variables are normalised by T, the total duration of the manoeuvre, so that The significance of the constant acceleration or deceleration guides is suggested to stem from the influence of gravity on the movement of humans and animals during evolution [1;5], while constant velocity is mimicked by horizontal motions of thrown objects, at least in the short term. Experiments have verified the existence of the intrinsic τ information embodied in the nervous system [5], as well as the potential use of  g guidance in aircraft operations [6][7][8][9]. Furthermore, previous investigations have shown that humans and animals tend to adopt constant  strategies during the deceleration phase for visually guided movements, such as a hummingbird docking on a feeder tube, automobile braking [20], helicopter quick-stop manoeuvres (where 0.5…”

Section: Review Of Tau Coupling Guidancementioning

confidence: 98%

See 1 more Smart Citation

Tau Coupling Investigation Using Positive Wavelet Analysis

Jump

Jones

2013

Journal of Guidance, Control, and Dynamics

Self Cite

View full text Add to dashboard Cite

Investigation into motion guidance using τ theory primarily relies on the accurate calculation of the coupling term between the tau (time-to-contact) of the motion, τ, and its relevant so-called tau guide. However, the traditional approach is numerically unstable, requiring experience and skill, and has limited application when information is incomplete. A new approach based on positive wavelet analysis, combined with the new concept of a guidance element, has been proposed to deal with these issues. The desired τ-guide shapes form the mother wavelet and its scale is considered to be the manoeuvre period. The scale and positions of interest are found by searching the best local correlation with the whitened original signal. An inverse de-whitening process is used to approximately reconstruct the original signal. The adequacy of the proposed approach has been demonstrated on data from piloted simulation. Results show that the proposed approach is feasible, has better numerical stability and reliability, enhanced performance and wider application.

show abstract

Section: Review Of Tau Coupling Guidancementioning

confidence: 98%

“…Moreover, its amplitude and period can be uniquely tuned by T, which functions as the scale (a) in Eq. (9). Therefore, the positive analysing wavelet for the constant acceleration guide used in this paper based on Eq.…”

Section: Step 2: Positive Wavelet Transform Of the Motion Gapmentioning

confidence: 99%

Tau Coupling Investigation Using Positive Wavelet Analysis

Jump

Jones

2013

Journal of Guidance, Control, and Dynamics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, David Lee is the leading proponent of the so-called "taucoupling theory". The central idea in this theory is that human and animal movement is guided by the 'time to contact or pass' a target or obstacle -a measure known as 'tau' [39,40]. In other words, this theory proposes that moving targets are intercepted at a specified goal zone by maintaining a constant ratio between the tau (time to closure) of the gap between the hand and the goal Tau coupling plays a main role in guiding movement.…”

Section: Perception and Visual Cuesmentioning

confidence: 99%

“…The optical flow theory gives some solutions in the way the pilot receive information from the environment. Using data from piloted flight simulations, the tau-guidance strategies is useful for flare and touchdown manoeuvre in terms of rate of change of the tau of height above the runway surface [39,40].…”

Section: Perception and Visual Cuesmentioning

confidence: 99%

Trigger event – a key factor in adverse Aircraft/Rotorcraft Pilot Couplings

Ioniţă¹,

Maniu²

2012

INCAS BULLETIN

View full text Add to dashboard Cite

show abstract

“…The manoeuvre closely resembles the final moments of the approach and landing phase in a fixed-wing aircraft. This, and other fixedwing aircraft manoeuvres, were examined by Mike Jump (36)(37)(38)(39) in his PhD study at Liverpool.…”

mentioning

confidence: 99%

The tau of flight control

Padfield

2011

Aeronaut. j.

View full text Add to dashboard Cite

are described as 'τ guides'. In this context the author presents his perspective on flight control, briefly reviewing τ-theory and providing examples from research conducted at The University of Liverpool during the period 1999-2011, including the work of several PhD students. Concepts for guidance algorithms suitable for augmented manual or autonomous control are discussed and the implications for handling qualities developments, particularly relating to flight in degraded visual conditions, are presented. Some outstanding questions pointing directions for future research are raised. NOMENCLATURE a(t)acceleration during stopping manoeuvre (m/sec 2 , ft/sec 2 ) C a constant in power law relationship between two variables c, n constants in the relationship derived from the NASA approach test dataopen-loop crossover model transfer function between response error and response G CL closed-loop crossover model transfer function g gravitational acceleration (m/sec 2 , ft/sec 2 ) h height above ground in flare manoeuvre (m, ft) h e eye-height unit K pilot-aircraft gain in crossover model, gain in ball tracking dynamic model ABSTRACTWith this survey paper, the author proposes a new 'tao' -a new way of understanding -of how pilots do what they do. Research into the control of purposeful action in the natural world suggests that very rapid, efficient and 'instinctive' techniques have evolved based on the time to close on a goal, or close a gap, τ(t), and its derivatives. Purposeful actions involve the closure of one or more physical gaps, each with its own time to close, varying with time. Maintaining a constant rate of change of τ(t) with time (< 1) during an approach will ensure a successful arresting when the gap is closed, but an animal's strategy can be adapted to the circumstances to achieve either a hard stop (aggressive action with τ > 0⋅5), or a soft stop (gentle action with τ < 0⋅5). Synchronous coupling of two motions, x(t) and y(t), such that the times to close are coupled, τ x = kτ y , results in the motion gaps x(t) and y(t) being related through a power law, x = Cy 1/k , and closing smoothly together; examples of such coupling in the form of pursuit tracking in the natural world abound. Research has also shown that gaps can be closed by following 'intrinsic' guides, or self-generated mental models of desired motion, that have particular forms; for example, constant deceleration or constant acceleration. The gathering evidence from research into animal behaviour in the natural-world forms a background for the exploration of flight control in the man-made world. The implications for control theory, flight control developments and flight handling qualities, are considered to be profound. τ-theory suggests that natural control has a particular non-linear, albeit very simple, time varying form and that pilots learn control strategy skills by developing mental models, or internalised schemata, in the form of what

show abstract

Progress in the development of guidance strategies for the landing flare manoeuvre using tau‐based parameters

Cited by 11 publications

References 17 publications

Tau Coupling Investigation Using Positive Wavelet Analysis

Tau Coupling Investigation Using Positive Wavelet Analysis

Trigger event – a key factor in adverse Aircraft/Rotorcraft Pilot Couplings

The tau of flight control

Contact Info

Product

Resources

About