Abstract:
When a vehicle runs along a curved path, successive values of a speed limit are calculated based on the yaw rate of the vehicle, and values of acceleration demand are calculated and applied to control the actual vehicle speed based on the speed limit. If commencement of oscillation of the yaw rate and acceleration demand is detected, due to running along the curved path, guard processing is applied to the values of speed limit used to calculate the acceleration demand or is applied to the acceleration demand, such as to prevent the acceleration demand from varying in a direction that would increase the speed limit. Instability of deceleration control due to the oscillation is thereby substantially suppressed.
Abstract:
A road shape recognizer includes a peripheral information recognizer that recognizes at least two items of peripheral information based on an output of a periphery detector. A reliability assigner assigns a reliability level to each of the peripheral information. A point sequence generator generates and places a point sequence representing a shape of a road on which the own vehicle travels, based on at least two items of peripheral information and the reliability level. The point sequence generator generates and places a point sequence by generating and placing points one by one toward a distant place from a point located at a prescribed relative position to the own vehicle. The point sequence generator generates and places the next point corresponding to an amount of change in shape and a position of a point generated and placed at the end of the point sequence. The amount of change in shape is represented by the peripheral information and determined per section having a prescribed distance.
Abstract:
A preceding vehicle selection apparatus estimates a curvature of a traveling road on which an own vehicle is traveling, detects an object ahead of the own vehicle, and determines a relative position in relation to the own vehicle, for each object ahead. Based on the estimated curvature and the determined relative position, an own vehicle lane probability instantaneous value for each object ahead is repeatedly determined. An own vehicle lane probability is determined by performing a filter calculation on the calculated own vehicle lane probability instantaneous value. Based on the determined own vehicle lane probability, a preceding vehicle is selected. Characteristics of the filter calculation are set such that an object ahead associated with a preceding vehicle selected in a previous processing cycle is relatively less affected by the own vehicle lane probability instantaneous value than an object ahead associated with an object other than the preceding vehicle.
Abstract:
In an inter-vehicle control apparatus, a controller performs acceleration control of an own vehicle, based on an actual inter-vehicle physical quantity and a target inter-vehicle physical quantity. A limiter sets a limit value for a target jerk during the acceleration control. A detector detects an occurrence of at least one of: an event in which the inter-vehicle distance becomes discontinuously shorter; and an event in which a target inter-vehicle distance corresponding to the target inter-vehicle physical quantity becomes discontinuously longer. A determiner determines a risk of collision with the preceding vehicle, based on an operation state of the preceding vehicle in relation to the own vehicle. When at least one of the events is detected, the limiter sets the limit value to a value based on the risk of collision such that change in deceleration of the own vehicle is kept lower as the risk of collision decreases.
Abstract:
A vehicle driving control apparatus is provided for controlling an own vehicle to track a target vehicle. The vehicle driving control apparatus includes: (1) means for acquiring an actual relative speed of the target vehicle to the own vehicle; (2) means for detecting occurrence of an event which causes the actual relative speed to discontinuously change; (3) means for setting a target acceleration of the own vehicle based on the product of a relative speed gain and a tracking relative speed when the own vehicle tracks the target vehicle, the tracking relative speed being normally set to the actual relative speed; and (4) means for correcting, upon detection of occurrence of the event by the detecting means, the tracking relative speed so as to gradually increase the absolute value of the tracking relative speed from a value that is less than the absolute value of the actual relative speed.
Abstract:
A leading vehicle detecting apparatus and inter-vehicular control apparatus which can reduce delay in deciding accurately whether or not the own vehicle is following a particular leading vehicle are provided. The leading vehicle detecting apparatus includes: a signal acquiring section that acquires position signals outputted from a position detecting section that detects the position of the leading vehicle, and detection signals outputted from state detecting sections that detect a state of an own vehicle cruising line; a storage section storing in advance a probability map showing the probability of the own vehicle following the leading vehicle, based on distance from an expected cruising line of the own vehicle to leading vehicle the position; and a calculating section that calculates the expected cruising line based on is the detection signals, and judges whether the own vehicle is following the leading vehicle based on the expected cruising line, position signals, and probability map.