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
Biometric adjustments for touchscreens
Laser processing machine having expanded work space
Capacitor having a characterized electrode and method for manufacturing same
Configurable status processing unit for sensor-actuator systems
System and method for determining an optimal route using aggregated route information
Docking audio
  Randomly Featured Patents
Semi-active electro-optical bomblet fuze
Cooling unit
Apparatus for actuating and locking a window sash
Demand valve for breathing apparatus
Partially resorbable connective tissue distraction devices and techniques
Modular drop charger and DC-DC converter for portable electronic equipment
Trick ball for throwing
Independent power consumption management in a MIMO transceiver and method for use therewith
Fuel heating control method and system
Circuit for reducing ELF electric fields radiated from CRT devices