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
Apparatus, system, and method for non-interruptively updating firmware on a redundant hardware controller
Power converter and method including noise suppression by controlling phase shifting of converter cells
Methods of saccharification of polysaccharides in plants
Process for the preparation of protected L-alanine derivatives
3D IC method and device
Power or voltage oscillation damping in a power transmission system
Integrated circuit packaging system with an integral-interposer-structure and method of manufacture thereof
  Randomly Featured Patents
Combined front bumper replacement and receiver hitch assembly for a vehicle
Accessory post
High density edgecard connector system
Gas turbine propulsion unit with devices for branching off compressor air for cooling of hot parts
Vehicle decklid position sensor and control
Padlock
Calibration of a surveying instrument
Banquet cart
Thermal vacuum heater array apparatus
Pharmaceutical compositions and method for inhibiting histamine release tocopheryl glycoside