Systems and methods for detecting an uncommanded brake overdrive condition

摘要

A method is provided for detecting an uncommanded brake overdrive condition in an aircraft brake control system. Method comprises monitoring, by an electric brake actuator controller (EBAC) in the brake control system, at least one of the following: a load cell current for deviation from a nominal load cell current and a load cell output signal (LC Sig+) and (LC Sig−) of a plurality of individual load cells and an excitation voltage signal comprising a (Vexc+) signal and a (Vexc−) signal. EBAC detects at least one resistance disturbance indicating the uncommanded brake overdrive condition if load cell current is less than nominal load cell current, if an absolute value of the difference between a sum of LC Sig+LC Sig− for at least one individual load cell and a sum of Vexc++Vexc− is greater than a predefined threshold, or both.

主权项

1. A method for detecting an uncommanded brake overdrive condition in a brake control system for an aircraft, the method comprising:
monitoring, by an electric brake actuator controller (EBAC) in the brake control system, at least one of the following:
a load cell current for deviation from a nominal load cell current; anda load cell output signal of an individual load cell of a plurality of individual load cells and an excitation voltage signal, the load cell output signal comprising an LC Sig+ output signal (LC Sig+) and an LC Sig− output signal (LC Sig−) and the excitation voltage signal comprising a Vexc+ signal (Vexc+) and a Vexc− signal (Vexc−); and detecting, by the electric brake actuator controller, at least one resistance disturbance indicating the uncommanded brake overdrive condition in response to the load cell current being less than the nominal load cell current, in response to an absolute value of a difference between a sum of the load cell output signals (LC Sig+ and LC Sig−) for at least one individual load cell of the plurality of individual load cells and a sum of the voltage excitation signals (Vexc+ and Vexc−) being greater than a predefined threshold, or both.