 Method for operating a load-dependent power-generating system in a vehicle |
| This application claims the priority of German patent application 101 11 562.8, filed 10 Mar. 2001, ... |
|
| Desired performance input fuzzy logic control system for automatic transmissions |
| We claim: 1. A fuzzy logic control system, for changing a ratio of an automatic transmission, ... |
|
| Microprocessor arrangement for a vehicle-control system |
| OF THE DRAWING As can be seen in this representation, the inventive microprocessor configuration ... |
|
| Signal device for positioning a vehicle |
| This invention relates to a visual signal device that aids a driver of a vehicle to position that ... |
|
| Method for digital transmission and display of weather imagery |
| In the present invention, minimal data is created to represent a source image reducing the ... |
|
| Remote portable display unit and engine analyzing system incorporating same |
| It is a general object of this invention to provide an improved machine diagnosis and analysis ... |
|
| Device for actuating a seat element and seat comprising it |
| What is claimed is: 1. A device for actuating a seat element, said device comprising: an actuator ... |
|
| Method and apparatus for modification of vehicular navigation information |
| We claim: 1. A method for modifying vehicular navigation information comprising: in a terrestrial ... |
|
| Pager supported traffic signal controller |
| A traffic control system in accordance with the invention is shown in the Figure. In that ... |
|
|
Aircraft traffic alert and collision avoidance device
| Details |
Inventors: Brodegard, William C.; Ryan, Dean E.; Ryan, Paul A.;
Assignee: Ryan International Corp. (Columbus, OH)
Primary Examiner: Black; Thomas G.
Assistant Examiner:
Attorney, Agent or Firm: Pollock, Vande Sande & Priddy
A passive aircraft Traffic alert and Collision Avoidance device (TCAD) is based on sensing and responding to transponder replies of other aircraft to SSR interrogations. In order to avoid masking other aircraft replies by the host transponder TCAD repeatedly and randomly suppresses the host transponder and simultaneously listens for other aircraft replies. Suppression on each occasion is effective for an equal and predetermined duration which is much longer than a typical reply, in a preferred embodiment the suppression/listen duration is 725 .mu.s. In this embodiment the time between successive suppression/listen occasions is random between 725 .mu.s. and 5.025 ms. with an average value of about 2.9 ms. Digital signal processing is used to detect and discard garbled or overlapping replies. Each valid reply, exhibiting a minimum pulse amplitude, is decoded and correlated with a calibrated range parameter and given a time tag. Successive replies which match to within predetermined criteria in time and calibrated range are merged to track the positional relation between the host and other aircraft. The positional relation between other aircraft and the host are evaluated via a priority table in terms of relative altitude and range to locate that craft which poses the highest threat to the host. Parameters of such a craft are displayed. In the event a craft penetrates a shield of programmable size an audible alert is sounded. TCAD provides for shields for each of a plurality of flight regimes, such as terminal, standard and enroute. Selection among shields is via a single pushbutton. TCAD allows the pilot to program each of the different shield sizes. Peripheral functions such as altitude deviation alert, density altitude and barometric pressure correction for altitude reporting are also provided. |
|
DETAILED DESCRIPTION The invention meets these and other problems in the prior art, providing a relatively simple, low-cost and effective Traffic Alert and Collision Avoidance Device (hereinafter TCAD).
Contrary to the accepted reasoning in the collision avoidance field, the present invention purposely does not attempt to generate relative azimuth (other craft relative to the host).
In another departure from accepted reasoning, the present invention does not attempt to establish precise range parameters.
Eliminating the need to establish precise distances between other craft (hereinafter traffic) and host is significant in maintaining low cost and simplicity.
The logical underpinning for eliminating precise range information has several bases.
In the first place, no two aircraft can collide unless they are at or near the same altitude.
Thus, the primary threat parameter that is relied on is altitude.
Secondly, given any receiver sensitivity or threshold, a corresponding range exists at which the detection probability is 100% regardless of reasonable transponder power and/or atmospheric variables.
So long as there is sufficient warning time for this range, the pilot with this warning time can effect a collision avoidance maneuver, if any maneuver is necessary.
Finally, trend information can be derived from changes in amplitude of the received signal.
Increasing amplitude indicates the traffic is closing in distance.
Since a collision threat remains on a fixed trajectory relative to the host, this trend information is essentially independent of power variations and is effective in providing the pilot with essential information in making an avoidance decision.
In accordance with the invention, a 1090 MHz receiver monitors ATCRBS transponder emissions.
The output of the receiver is monitored to detect and then decode replies by traffic to SSR interrogations.
The apparatus of the invention is coupled both to the host aircraft transponder and to the encoding altimeter which is typically present
|
| Related patents |
|
|
System and method for processing commands from a plurality of control sources
Pursuant to the present invention, a system for obtaining collective decisions from multiple control sources is disclosed. The system receives multiple commands from a ...
|
|
|
Aircraft location and identification system
The foregoing and other problems are overcome by an aircraft location and identification system, including a first position determining portion located aboard a ...
|
|
|
Multisource target correlation
OF THE INVENTION The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the ...
|
|
|
Method and apparatus for updating unfinished destinations specified in navigation system
It is, therefore, an object of the present invention to provide a navigation method and apparatus for updating unfinished destinations for a navigation system with ...
|
|
|
Vehicular brake-by-wire system
One form of the present invention contemplates a control system wherein a controller is adapted to receive operator commands, speed or motion data and output torque or ...
|
|
|
System for controlling the motion of a vehicle
It is an object of the invention to provide a suitable structure for the component "vehicle motion". SAE paper 950759 (Feb. 27 to Mar. 2, 1995) entitled "VDC, The V...
|
|
|
Vehicular brake-by-wire system
One form of the present invention contemplates a control system wherein a controller is adapted to receive operator commands, speed or motion data and output torque or ...
|
|
|
Method and apparatus for fuel metering in internal combustion engines
What is claimed and desired to be secured by Letters Patent of the United States is: 1. A method for controlling the fuel supply to an internal combustion engine ...
|
|
|
Integrated operation instructing system for operating power generation plants
It is an object of the present invention to resolve the above-mentioned problem and to provide an integrated operation instructing system for power generation plants ...
|
|
|
Method of estimating floor reactions of bipedal walking body, and method of estimating joint moments of bipedal walking body
1. A method of estimating a floor reaction force acting on each of leg bodies of a bipedal walking moving body, comprising: a first step of judging whether a motion ...
|
|
|
Navigation and GPS 
