KR19980039087A - Rolling control of car - Google Patents

Abstract

After analyzing the vehicle speed information and the wheel displacement information for the turning of the curve road, the rolling control of the vehicle is carried out to perform stable rolling control through the set fuzzy data. The driving information detecting means for detecting, the control means for analyzing each detected driving information as fuzzy data and outputting a control signal for rolling control, and comparing the signal analyzed by the control means with the set fuzzy data for rolling control. And a driving means for adjusting the pressure applied to the control object by opening and closing the valve in accordance with the driving signal of the purge calculating means.

Description

Rolling control of car

The present invention relates to a rolling control apparatus for a vehicle, and more particularly, to analyze the vehicle speed information and the wheel displacement information for turning a curve road and to perform stable rolling control through the set fuzzy data. It relates to a rolling control device for a vehicle.

In general, a car has a stabilizer bar, which is a kind of torsion bar, which has both ends connected to the left and right lower control arms, and the center part is connected to the frame so that the slope of the car body due to the centrifugal force when turning the curve in the independent suspension method. It is installed to prevent the increase and maintain the balance of the vehicle, and to prevent the left and right rolling generated when the road condition is poor.

This does not work when the left and right wheels move up and down at the same time, but when the left and right wheels move up and down differently, the vehicle body minimizes the inclination of the body.

In addition, the ECU controls the operating unit by integrating the vehicle's driving conditions, road conditions, and driver's selective switching mode detected by the sensors installed in each part of the vehicle to automatically adjust the height of the vehicle, the spring constant of the suspension device, and the damping force. It is equipped with an electronically controlled suspension that adjusts to provide ride comfort, steering and stability while driving.

As described above, each rolling control device that provides ride comfort, steering, and safety while driving the vehicle corresponds to a corresponding rolling control signal through a mathematical operation based on program logic set in the ECU. Since the operation of the control signal for rolling control is complicated, the response to the actual control signal output is delayed, and the limited memory area of the ECU cannot be efficiently used due to the complicated operation program. This is known.

In addition, since the area of the control signal calculated according to each detected condition is set to be limited, there is a problem in that it is not possible to carry out efficient control for each of the various running conditions, and thus it is not possible to maintain comfortable driving performance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to actively control rolling on the basis of data of a set fuzzy table based on vehicle speed change information and wheel displacement information for turning a curve road. It is to provide a stable ride and steering.

In addition, it provides a quick response by the control of the rolling by the fuzzy data, and to enable active control in each of the various operating conditions distributed.

In order to achieve the above object, the present invention provides a driving information detecting means for detecting displacement information generated according to a driving condition, and outputs a control signal for rolling control by analyzing each detected driving information as fuzzy data. Means, a purge calculating means for outputting a driving signal for rolling control by comparing the signal analyzed by the control means with a set fuzzy data, and a pressure applied to a control object by opening and closing a valve in accordance with the driving signal of the purge calculating means. It characterized in that it comprises a drive means for adjusting the.

1 is a block diagram of a rolling control device of a vehicle according to an embodiment of the present invention;

FIG. 2 is a fuzzy signal and a rolling control purge signal detected under respective conditions for rolling control in FIG. 1, (a) is a graph of information on a vehicle speed detected during driving, and (b) is a wheel angle detected during driving. Is a graph of displacement information, and (c) is a graph of control signals according to the conditions of (a) and (b).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen in Figure 1, the vehicle speed detection unit 10 of the rolling control apparatus of the vehicle according to an embodiment of the present invention detects the change in the vehicle speed accelerated deceleration of the vehicle running from the rotational speed of the output driven gear and predetermined Outputs a pulse signal.

The wheel angle detector 20 detects displacement of the wheel generated when the curve turns, and outputs a predetermined pulse signal thereto.

The controller 30 analyzes the detected vehicle speed information based on the data of the fuzzy table set as shown in FIG. 2A, and the displacement of the detected wheel is set as shown in FIG. 2B. Analyze based on data from

The fuzzy calculation unit 40 stores fuzzy data consisting of a predetermined table in the memory unit, and compares fuzzy data set according to a control signal applied thereto, and outputs a driving signal for active rolling control for each condition.

At this time, the control rules of the fuzzy data stored in the memory unit are shown in Table 1 below.

The actuator 50 opens the flow path in accordance with the signal applied from the purge calculating unit 40 to suppress rolling on the vehicle body, and adjusts the hydraulic pressure supplied to the ARS control system or the garage adjustment system to stabilize the rolling.

Referring to the rolling control operation through the fuzzy operation in the present invention having the function as described above are as follows.

The vehicle speed detector 10 detects a vehicle speed change with respect to the deceleration acceleration of the vehicle driven from the output driven gear speed and outputs a corresponding pulse signal to the controller 30 in the vehicle driving toward a predetermined destination. The wheel angle detector 20 detects the displacement information of the wheel angle, which is changed according to the turning of the curved road or the condition of the road surface, and applies it to the controller 30.

The controller 30 analyzes the applied deceleration-accelerated vehicle speed information and wheel angle displacement as fuzzy data as shown in FIGS. 2A and 2B and then applies them to the fuzzy calculator 40.

The fuzzy calculator 40 analyzes and applies the fuzzy data which is analyzed and applied as shown in FIGS. 2 (a) and (b) by the controller 30 to which the controller 30 is applied, and then compares the data of the set fuzzy table with FIG. As can be seen from), the hydraulic drive signal to be output is determined from the deviation value of the current wheel angle with respect to 0 ° (PM), for example, PSM, PS, ZO or PMB, PBM, PB to change in a small range of the deviation value. According to the minute, a control signal for suppressing rolling is applied to the actuator 50 side.

Accordingly, the actuator 50 opens and closes the valve according to the applied deviation compensation value to adjust the hydraulic pressure supplied to the ARS system or the garage adjustment system side to be controlled, thereby eliminating the rolling phenomenon affecting the vehicle body, thereby providing stable ride comfort and steering.

As described above, the present invention detects vehicle speed information and wheel displacement and accelerates rolling through fuzzy data in a vehicle traveling to a predetermined destination, thereby eliminating complicated mathematical operations, thereby providing fast response to rolling control. Is provided, and data of complicated formulas are excluded, thereby effectively using the memory area of the limited control means, and active rolling control is executed for each of the variously distributed conditions to provide reliability in operation.

Claims (3)

A rolling control apparatus for a vehicle, comprising: driving information detecting means for detecting displacement information generated according to a driving condition, controlling means for analyzing each detected driving information as fuzzy data and outputting a control signal for rolling control; And a purge calculating means for outputting a driving signal for rolling control by comparing the signal analyzed by the control means with a set fuzzy data, and adjusting a pressure applied to a control object by opening and closing a valve according to the driving signal of the purging calculating means. Rolling control apparatus for a vehicle, characterized in that it comprises a drive means. The vehicle information detecting means according to claim 1, wherein the driving information detecting means comprises vehicle speed detecting means for detecting vehicle speed information decelerating and decelerating during driving, and wheel angle detecting means for detecting displacement of a wheel generated by road conditions or turning. Rolling control. The method according to claim 1, wherein the control means detects the deviation caused by the feedback of the rolling control signal output to the control target and the variation of the deviation caused by the feedback within one unit sampling time to perform the rolling control from the value of the range having a small deviation. Rolling control apparatus for a vehicle, characterized in that the execution.