Hard landing event affect the flight safety seriously. In this paper, a decision support system that classifiers the hard landing signals of the civil aircraft to two classes (normal and abnormal) is presented to support fault diagnosis. As our previous paper where ANN is used as a classifier for event detection from measured hard landing signals. In this paper, our aim is to develop our previous work by using least-squares support vector machine (LS-SVM) classifier instead of ANN. We compare LS-SVM with backpropagation artificial neural network (BP-ANN) to classify the extracted features. In addition, we use receiver operator characteristic (ROC) curves to compare sensitivities and specificities of these classifiers and compute the area under the curves. Finally, performance of models are analysed, and the aspects of each model are given.

A Decision Support System Based on Support Vector Machine for Hard Landing of Civil Aircraft

Event indentification of hard landing is the hot spot in civil aviation safety research. In this paper, a incremental model to indentify aircraft land status of civil aircraft is presented to support fault diagnosis and structure maintenance. In previous reserach, traditional artificial neural network is used as a classifier for event detection from certain landing parameters. This paper develop a further recognition model by introducing support vector method, also an incremental algorithm is proposed to solve the problem of on line sample array, and sensitivity and specificity are employed to show the model performance comparing to existing model. Finally, advantage of this method is analysed, and the aspects of each model are given.

Incremental Support Vector Machine Learning Method for Aircraft Event Recognition

Establishment of airplane flight model and simulation analysis of landing behavior (EI CONFERENCE)

This paper create a high fidelity plant model of an aircraft landing gear to inclusion into a full aircraft flight simulation for accurately analyzing the performance and influence of landing gear system. The use of domain specific modeling software enables detailed modeling of the physics and facilitates accurate computational simulation of the flight dynamic, aerodynamic, landing gear dynamic and mechanical loads that occur when the landing gear are deployed and retracted during landing and take-off operations. The parameter design space is easily searched by considering a number of different landing scenarios including touching down on one wheel first, to optimize the design. The simulation results show that the aircraft landing gear system mathematical model established appropriately reflects the change of force and moment in the process of taking off and landing, and it is actual in the physical process.

Establishment of airplane flight model and simulation analysis of landing behavior

The modeling and simulation of plane's landing gear are very important to design the law of taking off and landing.The force of landing gear enduring in the process of taking off and landing was analyzed,and each force and moment was calculated according to the actual physical parameter of landing gear.After establishing the model of landing gear,the model in the simulation of some battle plan of our country was applied.The simulation result indicates this model appropriately reflects the change of force and moment in the process of plane's taking off and landing and it is actual in the physical process.

Dynamics Modelling and Simulation of Plane's Landing Gear

In order to improve the comfort of passengers during their daily life and rest during RV travel, the typical postures and ergonomic analysis dimensions of passengers’ behavior and activities were determined by analyzing the behavior of passengers in the RV living compartment. Using the er-呼东龙，林丽 gonomic analysis software Jack as a tool, a virtual simulation environment of the RV living cabin is built by constructing a three-dimensional model of a self-propelled C-type RV and a passenger digital human body model. By simulating the daily behavior and activities of RV passengers, the comfort, reachable area and passability are analyzed to find out the problems in the layout design of the RV living compartment, and propose optimization and improvement suggestions. The improvement improves the comfort and safety of the RV living cabin, and provides a basis for the spatial layout design of the RV living cabin.

Li Lin

Papers

Dynamics Modelling and Simulation of Plane's Landing Gear

Ergonomics Simulation of Self-Propelled C-Type RV Based on Jack