A display system for a vehicle and trailer is disclosed The system comprises an interface configured to receive a directional input and a controller in communication with the interface and a screen The controller is operable to receive a hitch angle and determine a heading direction of the trailer The controller is further operable to determine a predicted heading of the vehicle aligned with the trailer based on the hitch angle The predicted heading of the trailer is then displayed by the controller on the screen

Display system utilizing vehicle and trailer dynamics

Embodiments addressing MAC processing for efficient use of high throughput systems are disclosed. In one aspect, an apparatus comprises a first layer for receiving one or more packets from one or more data flows and for generating one or more first layer Protocol Data Units (PDUs) from the one or more packets. In another aspect, a second layer is deployed for generating one or more MAC frames based on the one or more MAC layer PDUs. In another aspect, a MAC frame is deployed for transmitting one or more MAC layer PDUs. The MAC frame may comprise a control channel for transmitting one or more allocations. The MAC frame may comprise one or more traffic segments in accordance with allocations.

Method, apparatus, and system for medium access control

A method for steering an agricultural vehicle comprising: receiving global positioning system (GPS) data including position and velocity information corresponding to at least one of a position, velocity, and course of the vehicle; receiving a yaw rate signal; and computing a compensated heading, the compensated heading comprising a blend of the yaw rate signal with heading information based on the GPS data. For each desired swath comprising a plurality of desired positions and desired headings, the method also comprises: computing an actual track and a cross track error from the desired swath based on the compensated heading and the position; calculating a desired radius of curvature to arrive at the desired track with a desired heading; and generating a steering command based on the desired radius of curvature to a steering mechanism, the steering mechanism configured to direct the vehicle.

Satellite based vehicle guidance control in straight and contour modes

A method for determining location of a mobile terminal includes repetitively switching power-on and power-off to a GPS receiver circuit which determines location of the mobile terminal using GPS signals. The power-on to power-off duty cycle of the GPS receiver circuit is regulated in response to distance that the mobile terminal has moved from a previously determined location. The power-on to power- off duty cycle can be regulated in response to identifying GPS isolation, in response to an acceleration-determined distance from previous GPS-determine location, an acceleration-determined velocity of the mobile terminal, availability of position assistance information from a cellular system, presence/absence of signals from a WLAN /Bluetooth device, and/or detection of a new cellular base station ID.

Mobile terminals and methods for regulating power-on/off of a gps positioning circuit

A vehicle trailer backup assist system and method includes a hitch angle detection apparatus and a target monitor controller. The target monitor controller processes images acquired of the trailer towed by a towing vehicle to assist with placement of a target on the trailer. The target monitor controller also monitors the target and provides feedback to the user as to proper positioning of the target on the trailer. A target move detection routine detects movement of a target by processing the pixels of the image to determine if a new trailer has been connected. Further, a trailer connection monitoring routine monitors for a changed trailer based on loss of the hitch angle or target for a predetermined time period.

Trailer monitoring system and method

The present invention solves the problems of the prior art by providing methods for compensating for temperature-dependent drift of bias in a vehicle heading sensor of a dead reckoning vehicle positioning system. Specifically, the invention uses a Kalman filter to generate a calibration curve for the rate of heading sensor bias drift with temperature change. The Kalman filter calculates coefficients for a model of heading sensor bias drift rate versus temperature at each point where the vehicle is stationary. The bias drift rate calibration curve is then used to estimate a heading sensor bias periodically while the vehicle is moving. The invention further provides a method for using an aging time for temperature sensor bias drift rate to force convergence of the error variance matrix of the Kalman filter. The invention further provides vehicle navigational systems that utilize the methods of the present invention.

Position and heading error-correction method and apparatus for vehicle navigation systems

PROBLEM TO BE SOLVED: To provide a vehicle navigation system for correcting the drift of temperature-dependent bias by a vehicle heading sensor with a dead-reckoning vehicle positioning system. SOLUTION: Especially, a Kalman filter produces a calibration curve of the bias drift rate of the heading sensor corresponding to the variation of the temperature. The Kalman filter calculates a model coefficient of the bias drift rate to the temperature of the heading sensor by point where a vehicle 4 is rested. Next, using the calibration curve of the bias drift rate, the bias of the heading sensor is periodically estimated while the vehicle is moving. Further, the navigation system converges the error dispersing matrix of the Kalman filter by using the aging time of the bias drift rate of the temperature sensor.

Russell S. Figor

Papers

Position and heading error-correction method and apparatus for vehicle navigation systems

Method and device for modifying position in vehicle navigation system and heading error