Aircraft high-load landing event detection, classification and maintenance guidance methods

An aircraft high-load landing event classification system, comprising an aircraft high-load landing detection system, the aircraft high-load landing event detection system comprising:

• one or more accelerometers, located at a selected position on an aircraft, and configured to collect, in real time, acceleration data during an aircraft landing process;
• a data acquisition unit, configured to collect, at a high sampling rate, the acceleration data transmitted by the accelerometer and perform processing and digitization;
• an acceleration data processing unit, configured to receive the acceleration data, monitor the acceleration data in real time, process and analyze collected data, and extract a touchdown event and a feature thereof;
• a storage unit, configured to store landing data;
• a data processor, located in a central computer of the aircraft or combined with a specialized hardware component, and comprising:
• a detection module, configured to receive a flight parameter and monitor the flight parameter in real time to assist in determining whether a high-load landing event occurs;
• a classification module, configured to process, fuse and analyze the stored landing data to determine an occurrence, type, and severity of the high-load landing event;
• a maintenance recommendation module, configured to calculate and estimate an aircraft landing load and a distribution thereof based on accelerometer data, match a targeted maintenance inspection action recommendation for the high-load landing event, and generate a high-load landing event report;
• an interface module, configured to receive data from an avionics bus, transmit the high-load landing event report, and send a relevant notification to an interested party;
• a threshold database, configured to provide a threshold for determining the high-load landing event and a severity thereof;
• a load distribution table, configured to provide a stress distribution estimate of a load at one or more key nodes of the aircraft in one or more key structural areas;
• a maintenance action table, configured to provide maintenance action recommendations for different types and severities of high-load landing events;
• wherein the aircraft high-load landing event classification system is configured to:
• extract, based on one or more of flight parameters stored in a first set, a touchdown event from stored acceleration data, wherein the acceleration data is measured by each accelerometer;
• compare one or more accelerometer measured values with a corresponding preset threshold to determine an acceleration exceedance event and a severity thereof in the touchdown event;
• extract one or more feature parameters of the touchdown event to form a parameter value table;
• fuse all stored landing data, and further analyze and extract one or more of flight parameters in a second set and/or a feature of a descent rate in the touchdown event to form an extended parameter value table;
• evaluate the extended parameter value table based on a high-load landing event classification rule, and identify a type of a high-load landing event through a classification algorithm;
• and notify, based on the type and severity of the high-load landing event, maintenance personnel, flight crew, airline management, an aircraft manufacturer, a regulatory agency, or any combination thereof through a relevant mechanism.