Resources Contact Us Home
Method and apparatuses for controlling high wing loaded parafoils

Image Number 11 for United States Patent #8131405.

An adaptive guidance system (AGS) regulates the altitude and heading of a parasail to arrive at a target at a prescribed altitude. Since the altitude profile depends both on unknown wing loading, and wind magnitude and direction, the AGS estimates the glide slope and wind on the fly and provides a command to a stability augmentation system (SAS) that results in the desired glide slope and heading by performing a sequence of maneuvers and sensing the response. According to one embodiment, the SAS operates in the linear region and includes a PID controller that uses the difference between the actual heading and heading command to create an actuator output. The actuator output is limited by a position/rate limiter that imposes the physical limitations of the response time of the actuator/servos and position limits to prevent entering the nonlinear region. Alternatively, an adaptive SAS operates in both the linear and nonlinear region and includes a neural network (NN) that receives an error signal (difference between a reference model and actual heading) which is used to adapt the weights of the NN.

  Recently Added Patents
Digital display
Driver circuit for driving semiconductor switches
Synchronization scheduling apparatus and method in real-time multi-core system
Bird deterrent
System and method for detecting executable machine instructions in a data stream
Method of operating a split gate flash memory cell with coupling gate
  Randomly Featured Patents
Automated on-line capacity expansion method for storage device
Apparatus for handling web roll shafts and cores
Envelope opening apparatus
Turbo vacuum pump
Zone lumbar massage system
Synthesis of steroids
Heat sensitive plate precursors
Vacuum switching tube having magnetic field electrodes
Hot water system
Merchandising terminal