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
Mobile application for calendar sharing and scheduling
Case for camera
Fingerprinting apparatus, system, and method
Sample holder and method for treating sample material
System and method for customized prompting
Disk drive
Adjustable box extender
  Randomly Featured Patents
Vaginal microscope
Semiconductor device having stacked transistors
Pistol type spear gun
Can-making method
Primary alkaline battery containing bismuth metal oxide
Hydrated stable fluent shortening containing solid phase emulsifier components
Machine for producing a triple-thread chain stitch for sewing webs over an edge
Method and apparatus for collecting statistics from elements at multiple collection rates
Jewelry ring with security aspect