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










Image Number 7 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
Radiation-emitting semiconductor chip and method for producing a radiation-emitting semiconductor chip
Electronic device with embedded antenna
Fuel cell system, and electric vehicle equipped with the fuel cell system
Local call local switching at handover
Method and apparatus for a battery docking connector having reserve power for hot battery swap
Horizontal aggregations in a relational database management system
Method and apparatus for controlling cardiac resynchronization therapy using cardiac impedance
  Randomly Featured Patents
Driving device for semiconductor laser
Plasma arc power supply and control method for same
Systems and methods for configuring ports
Raised source/drain with silicided contacts for semiconductor devices
Methods and apparatus for crystal oscillator drift estimation and compensation
Process for producing aromatic polycarbonate formed articles having coating layer with excellent surface properties
Front portion of an automobile
Scarper apparatus
Transparent films and laminates having the same
Scanning apparatus