KR20160010787A - Active roll stabilizer control apparatus - Google Patents

Abstract

The apparatus of the present invention comprises: an active rolling control module which comprises a stabilizer bar installed on the front wheel and the rear wheel of the body of a vehicle to compensate for the rolling of the body of the vehicle, and an actuator for adding torque to the stabilizer bar; and a control unit which comprises a switch for controlling the actuator to actively control the rolling generated during a rotating movement of the body of the vehicle and to serve as a relay of the actuator, and a fail-safe unit. When the control unit cannot work, the fail-safe unit can make a short circuit of the switch for applying power to the actuator to increase the hardness of the active rolling control module. Therefore, the active roll stabilizer control apparatus of the present invention can integrate a part of the major electronic units of the actuator of the active roll stabilizer control apparatus placed near the ground surface and the wheel with the control unit such as an ECU to simplify the structure of the driving unit, to reduce unit cost and to improve vibration/durability performance.

Description

[0001] The present invention relates to an active roll stabilizer control apparatus,

The present embodiment relates to a rolling active control device, and more particularly, to a control portion provided with a relay and a safety function portion provided in an actuator of a rolling active device, so that the structure of the actuator can be simply configured to achieve cost reduction and miniaturization To provide a rolling active control device.

The rolling active control device is capable of controlling the attitude of the vehicle by changing the stiffness of the stabilizer, and is a device for increasing stability and ride comfort. The rolling active control device includes a stabilizer bar, an actuator, and an ECU, and the actuator is controlled by the ECU.

Generally, the actuator control generates an input signal from the MCU to control a three-phase motor through a current of 12 V through an IPS (Intelligent Power Switch) and a relay in the actuator. At this time, the motor 3 phase sequentially receives signals of only two phases (U, V, U, W, or V, W) out of U, V and W phases and rotates the actuator.

Since the roll phenomenon occurs when the vehicle is turning, it is necessary to control the roll by changing the stiffness of the stabilizer in the rolling active control device, and the IPS in the ECU and the relay in the motor take the Fail-Safe function. In addition, if U, V, and W phases flow all the input signals to the motor, a closed loop is formed inside the motor, making it difficult to drive the motor from the outside. At this time, the motor generates a torsional elastic force to increase the stiffness of the stabilizer bar. In this way, the rolling active control actuator increases the overall stiffness to ensure vehicle stability.

However, even if the MCU generates an output signal to turn on the switch, the fail-safe relay may not actually be turned on due to external conditions, and the IPS must have a function of determining whether the relay is open or short-circuited. In addition, IPS is equipped with Fail-Safe function for disconnection / short circuit, which is expensive and occupies a large area in assembly of ECU. Therefore, it is required to improve the main electrical components in the ECU and the rolling active control device composed of IPS.

It is an object of the present invention to simplify the structure of the driving unit, reduce the cost, and improve the vibration / durability by integrating a part of the main electrical parts of the rolling active control device disposed near the ground and the wheel into the ECU.

According to an aspect of the present invention, there is provided an ARS device including: a vehicle body; A rolling active control module including a stabilizer bar installed on the front and rear wheels of the vehicle body to compensate for rolling of the vehicle body, and an actuator for applying torque to the stabilizer bar; And a controller for controlling the operation of the actuator to actively control rolling generated during a turning operation of the vehicle body and to perform a role of a relay of the actuator and a control unit including a fail- .

The safety function unit includes a rolling active control unit for shorting the switch for applying power to the actuator to increase the rigidity of the rolling active control module when the control unit is not operable.

In addition, the actuator is formed of a motor using U, V, W 3 phases, and the safety function unit can short-circuit the three phases using a switch.

The control unit may further include a determining unit that determines whether the actuator is energized.

Also, the controller may first determine whether the actuator is excited by the excitation determiner, and then control the actuator when the actuator is excited.

The control unit applies a power to the relay unit of the switch to energize the actuator coil. When the value of the PMW duty of the actuator is not zero, the current measured by the current sensor is equal to or greater than the reference value, If the position is not changed, it is determined that the safety function section continues to be short-circuited, so that the control of the actuator can be interrupted and a failure signal can be output to the driver.

Meanwhile, the rolling active control module may be installed separately in the front wheel and the rear wheel.

The control unit may further include: a front wheel control unit for controlling the front wheel rolling active control device; And a rear wheel controller for controlling the rear wheel rolling active control device.

The front wheel and the rear wheel control unit may be equipped with a switch and a safety function unit separately.

The front wheel and the rear wheel control unit may firstly determine whether the front and rear wheel actuators are energized, and then control the front and rear wheel actuators when the front and rear wheel actuators are in the energized state.

The control unit applies power to the relay unit of the switch to energize the front wheel and rear wheel actuator coils. When the value of the PMW duty of the front wheel and the rear wheel actuator is not zero and the current value measured by the current sensor is When the position of the front wheel and the rear wheel actuator is not changed and the position of the front wheel and the rear wheel actuator is not changed, it is determined that the safety function section is continuously short-circuited, and the control of the front wheel and the rear wheel actuator is stopped and a failure signal can be outputted to the driver.

According to the present embodiment as described above, the structure of the actuator can be simplified by integrating part of the main electrical components constituting the driving unit of the rolling active control device disposed near the ground and the wheel into a control unit such as an ECU, / Durability performance can be provided.

1 is a schematic configuration diagram of a rolling active control device according to the present embodiment,
2 is a block diagram showing the configuration of a rolling active control device;
3 is a circuit diagram of a control unit according to the present invention,
Fig. 4 is a flow chart schematically illustrating the line-out / short-circuit algorithm of the present invention.

Hereinafter, a rolling active control device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the following examples are provided to facilitate understanding of the present invention, and the scope of the present invention is not limited to the following examples. In addition, the following embodiments are provided to explain the present invention more fully to those skilled in the art and those skilled in the art will appreciate that those skilled in the art, Will be omitted.

2 is a block diagram showing a configuration of a rolling active control device, FIG. 3 is a circuit diagram of a control unit according to the present invention, and FIG. 4 is a block diagram Fig. 3 is a flow chart schematically showing the line-breaking / short-circuiting algorithm of the invention.

As shown in FIG. 1, front and rear rolling active control devices 20 and 30 may be installed in the vehicle body 10, and they may be controlled by the control unit 100. The front wheel rolling active control device 20 may include a stabilizer bar 21 for compensating the rolling of the vehicle body 10 and a front wheel actuator 22 for applying torque to the stabilizer bar 21. [ The configurations of the front wheel actuator 20 and the rear wheel actuator 30 may be basically the same. However, the present invention is not limited thereto, and the detailed configuration may be different according to need.

2 is a block diagram schematically illustrating the structure of a controller 1000 according to an embodiment of the present invention. The control unit 1000 includes front and rear wheel control units 1100 and 1200 that actively control the rolling generated in the turning operation of the vehicle body 10 and control the front and rear rolling active control devices 20 and 30, They can be provided individually. The battery 40 and the converter 50 are connected to the front wheel controller 1100 so that signals can be controlled and data such as the vehicle speed and the steering angle can be received.

3 is a block diagram schematically showing a configuration of a front wheel control unit according to the present embodiment.

The front wheel control unit 1100 may include an error determination unit 1111 and a safety function unit 1120 for determining whether the front wheel actuator 22 is excited. The determination unit 1111 includes a function for diagnosing disconnection / short circuit of three phases. The front wheel control unit 1100 is constituted by a dedicated device for driving the motor, and a Hall sensor input terminal for detecting RPM (Revolution Per Minute) of the motor may be installed. The safety function unit 1120 can control the front wheel actuator 22 by shorting the three phases using the switch 1110 in the excitation decision unit 1111 in the front wheel control unit 1100 during operation.

At this time, the front wheel controller 1100 first determines whether the front wheel actuator 22 is excited by the excitation determiner 1111 and then controls the front wheel actuator 22 when the front wheel actuator 22 is in the energized state, And the coil of the front wheel actuator 22 is excited.

The front wheel control unit 1100 receives data of a steering angle sensor, a wheel speed sensor and a lateral acceleration sensor (not shown), receives the data of the front wheel actuator 22 The operation can be controlled. For example, the front wheel control unit 1100 analyzes the electric signal input from the torque sensor and senses the driving situation by the driver, and outputs a supply current for controlling the driving torque of the motor to be suitable. 3, the front wheel control unit 1100 is connected to the current sensor 1400. However, the front wheel control unit 1100 is connected to a plurality of sensors for detecting a running situation such as a steering angle sensor, a lateral speed sensor, a lateral acceleration sensor, .

On the other hand, the front wheel control unit 1100 uses the current sensor 1400 to control the front wheel actuator 22 to determine the current flowing in the motor. In the present invention, since the front wheel actuator 22 is controlled by using the three-phase power source, the current sensor is attached to only two of the three phases, and the currents of the respective phases are measured. .

The front wheel control unit 1100 short-circuits the switch 1110 for applying power to the actuator when the safety control unit 1120 can not operate when controlling the rolling occurring in the turning operation of the vehicle body 10, The rigidity of the control module can be increased. At this time, the front wheel control unit 1100 receives a torque value from an unillustrated torque sensor and determines the switch disconnection / short circuit by the excitation decision unit 1111, switches on / off the power source 12V, Can be applied.

The relay unit 1112 receives a control signal from the front wheel control unit 1100 and transmits a control signal of the safety control unit 1120. When the switch is turned on by receiving a control signal from the front wheel control unit 1100, . Since the relay unit 1112 according to the present embodiment is of the normally closed type, when the DC power supply signal of 12V is excited to the relay coil, the switch on the relay 3 is turned off. The disconnected relay unit 1112 does not flow current from the front wheel actuator 22 requiring a three-phase power supply, and receives the two-phase signal in three phases from the FET module periodically, so that the front wheel actuator 22 can operate normally have. On the contrary, when the switch 1110 is turned off, the switch in the relay unit 1112 is short-circuited, and the DC power supply signal of 12V flows to the front wheel actuator 22 in all three phases, so that the safety control unit 1120 recognizes a failure do. When the safety control unit 1120 recognizes a failure, the front wheel actuator 22 is driven in the direction opposite to the direction in which the front wheel actuator 22 is currently driven, and a torsional elastic force is generated. At this time, the running stability of the vehicle can be maintained by performing an anti-roll function that effectively reduces rolls generated in the vehicle body by applying a roll moment opposite to the roll moment acting on the vehicle body by centrifugal force. However, since the body can be deformed due to this torsional force, a strut bar (tower bar) can be mounted to prevent the body from deforming.

As described above, the control unit 1000 according to an embodiment of the present invention can include front and rear wheel control units 1100 and 1200 individually on the front wheel and the rear wheel, ) 1200 may be installed integrally in one control unit. If the front wheel and the rear wheel control units 1100 and 1200 are installed separately as described above, the functions of the above-described determination unit and the safety function unit may be separately provided.

Further, the front and rear wheel control units 1100 and 1200 may first determine whether the front and rear wheel actuators are energized, and then control the front and rear wheel actuators when the front and rear wheel actuators are in the energized state.

4 is a line / short circuit algorithm according to an embodiment of the present invention. When the safety function unit 1120 is in an operating state, the front wheel control unit 1100 applies power to the relay unit 1112 of the switch 1110 to excite the coil of the front wheel actuator 22, and the rear wheel control unit 1200 ) Perform the same operation. Then, a value other than zero of the PMW duty of the front wheel and the rear wheel actuator may be applied (step S10).

Thereafter, the controller 1000 checks whether the current value applied to the front wheel actuator 22 is greater than the reference current value (step S20), detects the displacement of the motor constituted by the front wheel actuator 22, If it is determined that the front wheel actuator 22 is in the stop state (S30), it is determined that the safety function unit 1120 is continuously short-circuited. In this manner, if the safety function unit 1120 is short-circuited, it is possible to output a failure signal to the driver while interrupting the control of the front wheel and the rear wheel actuator (S40).

According to the present embodiment as described above, the structure of the actuator can be simplified by integrating a part of the main electrical components constituting the rolling active control device driving unit disposed near the ground and the wheel into the control unit 1000 such as an ECU, Reduction, and vibration / durability performance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

10; A vehicle body 20; Front Wheel Rolling Active Control Module
21; Front-wheel stabilizer bar 22; Front wheel actuator
30; A rear wheel rolling active control module 1000; The control unit
1100; A front wheel control unit 1110; Intelligent power switch
1111; A front wheel condition determining unit 1112; Relay part
1120; Front Wheel Safety Function

Claims (10)

A vehicle body;
A rolling active control module including a stabilizer bar installed on the front and rear wheels of the vehicle body to compensate for rolling of the vehicle body, and an actuator for applying torque to the stabilizer bar; And
A controller for controlling the operation of the actuator to actively control the rolling generated during the turning operation of the vehicle body and to perform a role of a relay of the actuator, and a fail-safe function; / RTI >
The safety function unit,
And shorting the switch that applies power to the actuator to increase the rigidity of the rolling active control module when the control unit is unable to operate. The method according to claim 1,
The actuator is formed of a motor using U, V, W 3 phases,
Wherein the safety function is operable to short-circuit the three phases using a switch. The method according to claim 1,
Wherein the controller further includes an excitation determining unit for determining whether the actuator is energized. The method of claim 3,
Wherein the control unit first determines whether or not the actuator is excited by the excitation determining unit, and then controls the actuator when the actuator is in the excitation state. The method according to claim 1,
Wherein the controller applies power to the relay of the switch to energize the actuator coil,
If the current value measured by the current sensor is equal to or greater than the reference value and the position of the actuator is not changed, it is determined that the safety function continues to be short-circuited and the control of the actuator is stopped A rolling active control device that outputs a fault signal to the driver. 2. The apparatus of claim 1, wherein the rolling active control module comprises:
Rolling active control unit installed separately on the front and rear wheels. 7. The apparatus of claim 6,
A front wheel control unit for controlling the front wheel rolling active control device; And
And a rear wheel control unit for controlling the rear-wheel rolling active control device. 8. The method of claim 7,
Wherein the front wheel and the rear wheel control unit individually include a switch and a safety function unit. 8. The method of claim 7,
Wherein the front wheel and the rear wheel control section first determines whether the front wheel and the rear wheel actuator are excited and then controls the front and rear wheel actuators when the front and rear wheel actuators are in the energized state. 8. The method of claim 7,
Wherein the controller applies power to a relay of the switch to energize the front and rear wheel actuator coils,
When the PMW duty of the front wheel and the rear wheel actuator is not zero and the current measured by the current sensor is equal to or greater than a reference value and the position of the front wheel and the rear wheel actuator is not changed, A rolling active control device for outputting a failure signal to a driver while stopping the control of the front wheel and rear wheel actuators.

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