Abstract
This chapter is dedicated to two other important EFCS-failure cases in aviation: runaway and jamming. A runaway is an untended (or uncontrolled) deflection of a control surface which can go until its stops if it remains undetected. A jamming is a scenario where a control surface is physically stuck at its current position. It will be shown that by careful fault modeling, simple estimation techniques (Kalman-based) can lead to remarkable results. The technique has been implemented as a part of the A380 Flight Control Computer (FCC) software and provided very good results on the Airbus test facilities. The robustness of the method has been confirmed during about 70 h of flight tests. This chapter follows the basic problem addressed in the previous chapter and deals with two other important EFCS-failure cases: runaway (aka hardover) and jamming (or lock-in-place failure) of aircraft control surfaces. Early and robust detection of such failures is also an important issue for achieving sustainability goals and for early system reconfiguration [1]. The chapter focuses on the elevator runaway and jamming. As outlined in the previous chapter, the elevator setting controls the pitch angle, an important function especially during takeoff and landing.
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Zolghadri, A., Henry, D., Cieslak, J., Efimov, D., Goupil, P. (2014). Robust Detection of Abnormal Aircraft Control Surface Position for Early System Reconfiguration. In: Fault Diagnosis and Fault-Tolerant Control and Guidance for Aerospace Vehicles. Advances in Industrial Control. Springer, London. https://doi.org/10.1007/978-1-4471-5313-9_4
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DOI: https://doi.org/10.1007/978-1-4471-5313-9_4
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