A Study On Bogie Motion Trajectory Online Detection Technology

With the development of railway construction in China, improving of people’s quality of life and progressing of the whole society humanistic consciousness,we had a higer requriement for trains’ runnirg safty and comfort.Bogie is the key component of a vehicle.It should have good lateral stability, smooth running and curve passing.Bogie’s working state directly affects the vehicle’s running safty.its running attitude affects the vehicle’s running attitude. Online detecting the bogie’s trajectory without affecting the bogie’s running,acquiring its attitude and position,to be combined with track’s state.that can evaluate the vehicle’s operation quality.And it is very important for ensuring the safty and stability for high-speed running vehicles.This paper has studied the online detecting system for train bogie’s trajectory. The main work has been described in details as follows:1.After introduced present condition of train bogie detection in brief,by comparing several kinds of attitude detecting methods,strapdown inertial navigation technology was chosen which is widely used for aviation and marine to calculate the bogie’s nodding angle,roll angle,yaw angle and position informations;2.Principles and algorithms of strapdown inertial navigation technology were studied. The final solution of detection system was determined with the compartment between the advantages and disadvantages of those attitude updating algorithms.3.The detection system’s error sources was analysed and its Kalman filtering model was established. Kalman filtering of the initial aligning attitude error was simulated.4. The detection system’s hardware and software were designed.The bogie’s three-dimensional angular rate and acceleration signal were acquired. The data’s storage and unpacking were realized. MATLAB was used for coding strapdown inertial navigation solution procedure.The bogie’s attitude and position information were extracted by importing the collected data to the procedure.5.The detection system was installed and tested on the simulation test train.The caiculational results were realized and analysed. The feasibility of the system was verified through the test.