Emergency flight control using only engine thrust and lateral center-of-gravity offset - A first look

Burcham, Frank W.; Burken, John J.; Maine, Trindel A.; Bull, John

doi:10.2514/6.1997-3189

Cited by 15 publications

(16 citation statements)

References 1 publication

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“…The development which follows is similar in spirit to Alwi & Edwards [16] but is different in detail because of the model reference setting. Using (4) and (5), it can be shown that (1) can be written aṡ…”

Section: A Model Reference Sliding Mode Control Allocation Schemementioning

confidence: 99%

Evaluation of a Sliding Mode Fault-Tolerant Controller for the El Al Incident

Alwi¹,

Edwards²,

Stroosma³

et al. 2010

Journal of Guidance, Control, and Dynamics

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This paper presents piloted flight simulator results associated with the EL-AL flight 1862 scenario using a model reference-based sliding mode control allocation scheme for fault tolerant control. The proposed controller design was carried out without any knowledge of the type of failure, and in the absence of any fault detection and isolation strategy. This is motivated by the fact that the flight crew were unaware of the loss of the right engines. For this reason, the control allocation scheme which is proposed uses (fixed) equal distribution of the control signals to all actuators (for both nominal situations and when a fault or failure occurs). The paper analyzes the scheme and determines the conditions under which closed-loop stability is retained. The results represent the successful real-time implementation of the proposed controller on the SIMONA motion flight simulator configured to represent a B747 aircraft. The evaluation results from the experienced pilots show that the proposed controller has the ability to position the aircraft for landing in both a nominal and the EL-AL failure scenario. It is also shown that actuator faults and failures which occured during the EL-AL incident can be handled directly without reconfiguring the controller.

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Section: A Model Reference Sliding Mode Control Allocation Schemementioning

confidence: 99%

Evaluation of a Sliding Mode Fault-Tolerant Controller for the El Al Incident

Alwi¹,

Edwards²,

Stroosma³

et al. 2010

Journal of Guidance, Control, and Dynamics

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show abstract

“…PCA is a special case of MMST, where the only anticipated fault is total hydraulics failure and only the engines can be used for control. There have been some successful flight tests with PCA on a F-15 and an MD-11 in the beginning of the 1990's [32,33].…”

Section: Multiple Model Controlmentioning

confidence: 99%

“…The design procedure starts by defining the tracking errors as 32) where α * are the intermediate control laws to be defined. The dynamics of z 1 satisfẏ…”

Section: Control Designmentioning

confidence: 99%

Adaptive Backstepping Flight Control for Modern Fighter Aircraft

Sonneveldt¹

2011

Advances in Flight Control Systems

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“…After the possibility of control using only the engine throttles was demonstrated by the Sioux City accident (see Chapter 1), and following a recommendation from the National Transportation Safety Board of America, the PCA problem was taken up by the NASA Dryden Flight Research Center [16,17] in order to provide a backup in case of total hydraulic failure. PCA is a specific instance of a multi-model approach where the fault model is identical to the nominal one, but in which all control surfaces are free floating.…”

Section: Propulsion Controlled Aircraft (Pca)mentioning

confidence: 99%