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
Automatic pill dispenser
Small molecule inhibitors of kynurenine-3-monooxygenase
System and method for providing advice to consumer regarding a payment transaction
Indexing, relating and managing information about entities
Fused thiazole derivatives as kinase inhibitors
System, apparatus and method for enabling/disabling display data channel access to enable/disable high-bandwidth digital content protection
High-speed comparator with asymmetric frequency response
  Randomly Featured Patents
Photo detector bending beam flow switch and flow meter
Lightbar modules
Method and device for tunnel microscopy
Preliminary verification system which has a authentication by phone on the internet environment
Power supply for electronic control system
Interoperability using a local proxy server
Etching a succession of articles from a strip of sheet metal
Coupling for joining flexible tubing for medical purposes
Method and system of sending a voice message in a wireless communication network