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










Image Number 10 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
Cordless hand blender
Translucent internal graphics enhancement
Side portion of a circular saw blade
Stain-blocking aqueous coating composition
Treatment of cancer using the sodium salt of a benzoic acid derivative
Method for conformal plasma immersed ion implantation assisted by atomic layer deposition
Method and apparatus for optimizing transmission diversity
  Randomly Featured Patents
Conveyable heating apparatus
Quadrature error correction
Ink recognition for use in character-based applications
Method for removing iodine compound from acetic acid
Receiver
Connector system with a lever requiring small force
Bleaching composition
Plant hanger
Wafer transfer apparatus and device and method for cleaning robot arm in wafer transfer apparatus
Electrophotographic photoreceptor containing an arylamine type compound