Active safety apparatus for vehicles and method of controlling the same
First Claim
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1. An active safety apparatus for a vehicle, comprising:
- an impact sensing unit for sensing an impact acceleration of the vehicle;
an active controller for estimating a vehicle behavior using an impact acceleration pulse output from the impact sensing unit, estimating a passenger behavior according to the estimated vehicle behavior, setting a target value of the passenger behavior which satisfies a restraining condition realizing passenger safety according to the estimated passenger behavior, setting an operating amount of an active safety device to realize the target value of the passenger behavior, and operating the active safety device according to the operating amount; and
a sensing unit for sensing a result of operating the active safety device and sending the sensed result to the active controller;
wherein the active controller performs control using feedback in such a way that the active controller repeatedly and periodically sets the target value of the passenger behavior by estimating both the vehicle behavior and the passenger behavior at a predetermined period, and resets the operating amount of the active safety device by applying a correction value to a reference value after setting the target value of the passenger behavior to be equal to the reference value and setting the sensed result of operating the active safety device output from the sensing unit to be equal to the correction value;
wherein the active controller sets the operating amount of the active safety device by using a first linear model in which a result determined by applying the correction value to the reference value of the target value of the passenger behavior is set to an independent variable and the operating amount of the active safety device is set to a dependent variable;
wherein the active controller determines the correction value using a second linear model in which the sensed result output from the sensing unit is set to an independent variable and the correction value is set to a dependent variable;
wherein the active controller determines the correction value by using a second linear model into which the measured passenger behavior is inputted; and
wherein the active controller sets a target chest acceleration as the target value of the passenger behavior, by estimating the vehicle behavior according to the impact acceleration pulse output from the impact sensing unit using a least mean square error method, and by estimating the passenger behavior according to the estimated vehicle behavior, and by optimizing the restraining condition realizing passenger safety according to the estimated passenger behavior in such a way that both a condition in which a total chest behavior of the passenger is less than a distance between a passenger'"'"'s chest and a steering wheel just before a vehicle collision and a condition in which a passenger'"'"'s chest speed is zero at an end of the collision are satisfied.
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Abstract
An active safety apparatus for vehicles and a method of controlling the apparatus, which can actively control the operation of a safety device, such as an airbag device or a seatbelt device installed in a vehicle for restraining a passenger behavior and protecting a passenger in a vehicle collision, based on the conditions of a vehicle collision and the passenger behavior which vary depending on the conditions of the vehicle collision, thereby optimally protecting the passenger for the conditions of the vehicle collision and improving passenger safety of the vehicle.
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Citations
5 Claims
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1. An active safety apparatus for a vehicle, comprising:
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an impact sensing unit for sensing an impact acceleration of the vehicle; an active controller for estimating a vehicle behavior using an impact acceleration pulse output from the impact sensing unit, estimating a passenger behavior according to the estimated vehicle behavior, setting a target value of the passenger behavior which satisfies a restraining condition realizing passenger safety according to the estimated passenger behavior, setting an operating amount of an active safety device to realize the target value of the passenger behavior, and operating the active safety device according to the operating amount; and a sensing unit for sensing a result of operating the active safety device and sending the sensed result to the active controller; wherein the active controller performs control using feedback in such a way that the active controller repeatedly and periodically sets the target value of the passenger behavior by estimating both the vehicle behavior and the passenger behavior at a predetermined period, and resets the operating amount of the active safety device by applying a correction value to a reference value after setting the target value of the passenger behavior to be equal to the reference value and setting the sensed result of operating the active safety device output from the sensing unit to be equal to the correction value; wherein the active controller sets the operating amount of the active safety device by using a first linear model in which a result determined by applying the correction value to the reference value of the target value of the passenger behavior is set to an independent variable and the operating amount of the active safety device is set to a dependent variable; wherein the active controller determines the correction value using a second linear model in which the sensed result output from the sensing unit is set to an independent variable and the correction value is set to a dependent variable; wherein the active controller determines the correction value by using a second linear model into which the measured passenger behavior is inputted; and wherein the active controller sets a target chest acceleration as the target value of the passenger behavior, by estimating the vehicle behavior according to the impact acceleration pulse output from the impact sensing unit using a least mean square error method, and by estimating the passenger behavior according to the estimated vehicle behavior, and by optimizing the restraining condition realizing passenger safety according to the estimated passenger behavior in such a way that both a condition in which a total chest behavior of the passenger is less than a distance between a passenger'"'"'s chest and a steering wheel just before a vehicle collision and a condition in which a passenger'"'"'s chest speed is zero at an end of the collision are satisfied. - View Dependent Claims (2, 3)
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4. A method of controlling an active safety apparatus for a vehicle, comprising:
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estimating a vehicle behavior using an impact acceleration pulse of the vehicle; estimating a passenger behavior based on the estimated vehicle behavior and setting a target value of the passenger behavior which satisfies a restraining condition realizing a passenger safety based on the estimated passenger behavior; setting an operating amount of an active safety device realizing the target value of the passenger behavior; operating the active safety device according to the operating amount; performing control using feedback in such a way that the active controller repeatedly and periodically sets the target value of the passenger behavior by estimating both the vehicle behavior and the passenger behavior at a predetermined period, and resets the operating amount of the active safety device by applying a correction value to a reference value after setting the target value of the passenger behavior to be equal to the reference value and setting the sensed result of operating the active safety device output from the sensing unit to be equal to the correction value; setting the operating amount of the active safety device by using a first linear model in which a result determined by applying the correction value to the reference value of the target value of the passenger behavior is set to an independent variable and the operating amount of the active safety device is set to a dependent variable; and determining the correction value using a second linear model in which the sensed result output from the sensing unit is set to an independent variable and the correction value is set to a dependent variable; determining the correction value by using a second linear model into which the measured passenger behavior is inputted; and setting a target chest acceleration as the target value of the passenger behavior, by estimating the vehicle behavior according to the impact acceleration pulse output from the impact sensing unit using a least mean square error method, and by estimating the passenger behavior according to the estimated vehicle behavior, and by optimizing the restraining condition realizing passenger safety according to the estimated passenger behavior in such a way that both a condition in which a total chest behavior of the passenger is less than a distance between a passenger'"'"'s chest and a steering wheel just before a vehicle collision and a condition in which a passenger'"'"'s chest speed is zero at an end of the collision are satisfied. - View Dependent Claims (5)
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Specification