JPS6152436A - Actuator control device - Google Patents

Abstract

PURPOSE:To shift a device used for adjusting the hardness of a shock absorber to the goal according to up-to-date shift instruction information by setting a designated working pattern to stop the device at an intermediate position. CONSTITUTION:There is provided a switch for switching the hardness of a shock absorber in three stages, wherein when a soft contact and a normal contact are turned on, a drive current is applied during the period of time T1 in such a manner that an actuator (motor) is turned counterclockwise or clockwise. The period of time T1 is set at time enough to make a turn from one end to the other end of the actuator. Accordingly, in case of shifting from the intermediate position, the actuator is stopped by a cushion for stopping the rotation, and after that, only an electric current flows therethrough. When a hard contact is turned on, the actuator is turned counterclockwise, the actuator is moved to one end side, and then turned clockwise. At this time, an auxiliary actuator (solenoid) is shifted to be positioned at the intermediate position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for an actuator used when changing the stiffness of a shock absorber of a vehicle suspension.

[Conventional technology]

An actuator that uses a motor and a sector gear as an actuator for switching the stiffness of a shock absorber into three stages using fluid resistance has been considered.

[Problem that the invention seeks to solve]

In the case of the conventional device, in order to stop the actuator gear at an intermediate position, an auxiliary actuator is operated, but the direction of rotation of the motor must be changed depending on the position before actuation. To do this, one possible method is to store information on which direction the motor was last rotated in an electronic circuit, etc., and then use the logic between the stored signal and the actuator operation instruction signal to instruct the motor rotation direction. In this case, after the actuator has started operating to change it to a certain position, if an operation instruction signal to change the actuator to another position is received before the operation is finished, the operation should be changed midway to the latest position. I can't. This is because the predicted actuator position stored in the energization signal may differ from the actual position.

Therefore, it is necessary to decipher whether the input signal at the end of the first operation is the same as the target position during operation or different, and then decide whether or not to perform the next operation, resulting in complicated control logic. become.

[Means for solving problems]

In the present invention, when an input is received to move the actuator to an intermediate position, the actuator is first energized to fully rotate in one direction, regardless of its past position, and then immediately rotated in the other direction and activated.

[For production]

According to the invention, when an intermediate position is to be achieved, the same operation is always performed and the operating position of the actuator moves to the intermediate position in a fixed pattern.

〔Effect of the invention〕

Therefore, in the present invention, the actuator can be operated to the target position according to the latest actuation instruction information without using a memory circuit.

[Embodiment] In FIG. 1 showing an embodiment of the present invention, 1 is a buff battery that is a power source for a vehicle, 2 is a key switch, and 3 is a switch that switches the shock absorber's hard damping force into three stages. It consists of a rotary inch, pushbutton switch, etc., and is manually switched. 3a,
3b and 3c are the contacts of the switch 3, 3a is the soft position where the absorber is the softest, 3b is the normal position which is intermediate in hardness, and 3c is the hard position where it is the hardest. 4a, 4b, 4c are pull-down resistors, 5 is a 3-man power OR gate, 6 is a timer that outputs a high level signal for 5200ms when the human power 6a rises to a high level, 7 is the person's cuff a is at a high level This is a timer that outputs a high level signal for 400 ms from the time when timer 6.
Both 7 are timers that are triggered every time the input rises.

8 is the signal of the switch contacts 3a, 3b, 3c and the timer 6
．． Five of the output signals of 7 are input to input terminals 8a, 8b, 8, respectively.
c, 8d, and 8e, and the five-person combinational logic process is performed, and the output is 8g.

9 is a drive circuit that amplifies the signals of the outputs 9e and 8f of the logic processing section to rotate the motor 11 forward, reverse, and stop; 10 is the output of the logic section. The drive circuit amplifies the 8g signal and drives the solenoid 12. 13 is a motor forward rotation output terminal, and 14 is a motor reverse output terminal. When the output terminal 13 is at a high level voltage and the output terminal 14 is at a ground level, the motor is The motor rotates in the normal direction, and conversely, when the output terminal 14 is at a high level voltage and the output terminal 13 is at the ground level, the motor rotates in the reverse direction, and when both terminals 13 and 14 are at the ground level, the motor stops.

In the above configuration, when the key switch 2 is turned on or when the key switch 2 is already turned on, the input is input to the OR circuit 5 from the turned on part of the contacts of the hardness selection switch 3, and the rise of the output of the OR circuit 5 The timer 6 is started. In addition, this Kuimaro period is also TI (200m
s) and is triggered on the latest input rising edge. Therefore, the output of the timer 6 is always at a high level for 200 ms from the time the key switch 2 is turned on or the contact of the switch 3 is changed. Note that T1 of 200 ms is a value set as a sufficient energization time for the actuator to complete one rotation.

Further, when the contact point of the switch 3 is switched to the point 3b (hard position), a rising signal is input to the Quimuff separately from the OR circuit 5. Timer 7 is activated by timer 6 due to the rising edge of the input.
The output is set to high level for T2 (400ms), which is twice as long as T2 (400ms), and is also retriggered by the latest input rising edge. The five binary inputs of the logic processing section 8 are outputted to outputs 8e, 8f, and 8g according to the truth table shown in FIG.

To explain Fig. 3, 101 is the case when switch 3 is in the soft position, that is, 3a is turned on, and when the key switch 2 is turned on at the same time as switch 3 is set to the soft position or while it is in the soft position, the timer T + -200m is set.
s high level signal is generated, but switch 3 is 3a
While ON and TI, the motor rotates forward and the sector gear of the actuator finishes rotating counterclockwise.At this time, there is no electricity to the solenoid, so it is stopped by the counterclockwise rotation stop cushion, and then TI=200 ms ends. The motor is no longer energized.

Next, as shown in FIG. 3 102, for example, if the switch is switched to the normal position, that is, the contact 3b is turned on, or if the key switch 2 is turned on while it is in the normal position, the timer TI is activated, the motor is reversed, and the actuator is turned on. The sector gear rotates clockwise. At this time, the solenoid is not energized, so it is stopped by the clockwise rotation stop cushion.
Thereafter, the timer T1 ends, so the motor is no longer energized.

Next, Fig. 3 103 and 104 show the case where the key switch 2 is switched to the switch edge 3 hard position, that is, the contact 3C, or is turned on with the key switch 2 in the hard position, and the timer T+ (2
00ms) and Tie 7T2 (400m5) both start high level output. At 103, first, while the timer T1 is at a high level, the motor is energized to rotate in the normal direction regardless of the previous actuator position. However, if the actuator position is already in the soft state at this time, the motor will not rotate and only current will flow for 200 m5. After the motor finishes rotating to the left, the timer TI ends, and when the e-timer TI ends, the timer becomes 10.
4, the motor is reversed and the solenoid is energized at the same time, and when the timer T2 expires, the energization ends. This operation of 104 causes the sector gear of the actuator to stop at an intermediate position. Figure 2 shows a time chart of the above operation.

Note that once the switch 3 is switched to a certain position, the actuator starts operating, and before it has finished rotating to the final fixed position, or even after it has rotated to the final fixed position, the actuator may still be at T1. T2
If the switch is switched to another position even while the remaining energization is being carried out after the switch is activated and moved to the final position, the previous energization will be stopped and the latest operation will start at the same time as the switch is switched.

The above embodiments have been explained based on the assumption that a low-rise actuator is used, in which the sector gear is rotated by a pinion that rotates with the rotation of the motor, but the same control can be achieved by using a linear motion system that uses a rank gear instead of the sector gear. .

Furthermore, in the embodiment described above, a manual switch is used as a signal for switching the actuator position, but instead of this switch signal, an automatic switching method using logic output signals such as vehicle speed, steering angle, vehicle acceleration, etc. alone or in combination is used. It may be used for

Note that the OR gate 5, timer 6.
7. The logic processing section may use an individual logic IC or a one-chip microcomputer.

[Brief explanation of drawings]

FIG. 1 is an electrical wiring diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of the embodiment, and FIG. 3 is an explanatory diagram showing the functions of the logic processing section in the embodiment. 3... Switch, 6.7... Timer, 8... Logic processing unit, 9, 10... Drive circuit, 11... Motor (actuator), 12... Solenoid (auxiliary actuator).

Claims (1)

[Claims] In an actuator control device that operates an actuator having at least three operating positions, ie, both end positions and an intermediate position, and an auxiliary actuator for stopping at an intermediate position, prior to operating the auxiliary actuator,
An actuator control device characterized in that, regardless of the previous actuator position, the actuator is once actuated toward one of both determined ends, and then actuated in a direction toward the other end, and the auxiliary actuator is actuated.