Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
System and method for managing content on a network interface
Multicyclic compounds and methods of use thereof
Integrated control system for stability control of yaw, roll and lateral motion of a driving vehicle using an integrated sensing system to determine longitudinal velocity
Di and tri- substituted oxathiazine derivatives, method for the production, method for the production thereof, use thereof as medicine and drug containing said derivatives and use thereof
Dispenser
Method and system of channel detecting and reporting, terminal, and management center
System for thermally controlling displays
  Randomly Featured Patents
Straight path carbon powder combustion machine
Enhanced memory addressing control
Pen
Membrane-electrode assembly for solid polymer electrolyte fuel cell
Bonded lightweight mirror structure
Copolymer resin, preparation thereof, and photoresist using the same
Method and apparatus for jewelry and small parts cleaning
Method for reducing capacitance depletion during hemispherical grain polysilicon synthesis for DRAM
Acid-functional polymers derived from cellulose acetate butyrate unsaturated alcohol copolymers and coatings prepared from same
Water-blown silicone foam