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
Evaluating programmer efficiency in maintaining software systems
Optimized delivery of web application code
Modular authoring and visualization of rules using trees
Prodrugs of [4 [4-(5-Aminomethyl-2-fluoro-phenyl)-piperidin-1-yl]-(1H-pyrrolo-pyridin-yl- )-methanones and synthesis thereof
Functionalized main chain polymers
Antenna tuning on an impedance trajectory
Support for a portable electronic device
  Randomly Featured Patents
Three-dimensional structure viewer and method of viewing three-dimensional structure
Image controlling apparatus capable of controlling reproduction of image data in accordance with event
Method and apparatus for stabilizing adjacent vertebrae
Functional membrane and electrolyte membrane for fuel cells and method for producing the same
Vehicle glass run channel
Image forming characteristics measuring method, image forming characteristics adjusting method, exposure method and apparatus, program and storage medium, and device manufacturing method
Process for improving the adhesive properties of polyolefin products
Auto-injector for liquid medicate
Flat panel surface array
Developing treatment method, program, computer storage medium and developing treatment system