Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Dynamic angle of attack measurement system and method therefor










Image Number 11 for United States Patent #6381521.

A method measures the angle of attack for the leading and trailing sets of wheels in trucks of rail vehicles traveling over track in a wayside system. At a first point on the outside rail of a track vertical force is measured with a first vertical strain gage, lateral force is measured with a first lateral strain gage and an outside angle of attack timing signal is measured with a first angle of attack strain gage. This process is repeated on the inside track so that a raw angle of attack for each set of wheels can be determined based upon speed and time difference. Ratios between the lateral force and the vertical force for the wheels of each are used to select raw angle of attack values for properly steering trucks that are averaged together to obtain an average angular offset value related to any misalignment of the strain gages. A dynamic angle of attack for each set of wheels is obtained by subtracting the average angular offset value from each raw angle of attack value to obtain a dynamic angle of attack value for each set of wheels. Greater accuracy in measuring angle of attack values occurs by taking a derivative of the data and using a polynomial fit to find the derivative's peak.








 
 
  Recently Added Patents
Method for manufacturing light emitting diodes
Personalized dashboard architecture for displaying data display applications
System and methods for weak authentication data reinforcement
Wireless control kit for camera
Self-diagnostic method and system for implantable cardiac device
System and method for parallel video processing in multicore devices
Non-phosphorus-based gellant for hydrocarbon fluids
  Randomly Featured Patents
Thrust nozzle for rocket engine with ablating lining
Implantable prostheses with metallic porous bead preforms applied during casting and method of forming the same
Touch display panel and liquid crystal display
Method and apparatus for scaling signals to prevent amplitude clipping
Plate-type antenna
Block design for retaining wall
Expansible tunneling apparatus for creating an anatomic working space
Mobile radio communication apparatus
Polymeric castor dimer polyesters
Serial bus power cable