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
Key management policies for cryptographic keys
Distributed IPv6 neighbor discovery for large datacenter switching systems
Secure device sharing
Laminar library screen
Method and system for providing status of a machine
Hemostatic devices and methods of making same
  Randomly Featured Patents
Computer system and method providing a memory buffer for use with native and platform-independent software code
Method and apparatus for writing with head having spaced read and write elements
Method to achieve fast active scan in 802.11 WLAN
Data modulation method and apparatus
Sunshade having base
Method of sending an executable code to a reception device and method of executing this code
Method and system for sharing a single antenna for frequency modulation (FM) reception or FM transmission and near field communication (NFC)
Pulse rejection circuit model program and technique in VHDL
Method and apparatus for coupling a meter register to an automatic meter reading communication device
Stationary turbine blade having diaphragm construction