JPH06129483A - Vibro-controller - Google Patents

Abstract

PURPOSE:To minimize the extent of transmission of an engine vibration to a car body and a periodic vibration other than the engine's. CONSTITUTION:An explosion of an engine and a rotation of a tire 12 are all detected by pulse sensors 16 and 116. With a control circuit 22, a period is integral times of a vibrational period of a shake vibration due to an engine explosive period and the unbalance of the tire 12 and plural sin waveforms different in each period, and the period is the same as the sin waveform and plural pieces of cos waveforms with a phase difference of 90 degrees to the sin waveform are generated, through which amplitude of the sin waveform and another amplitude of the cos waveform are compensated so as to damp the amplitude of a car body 10. On the basis of compound waveform made up of compounding each of plural pieces of the compensated sin waveforms and the cos waveforms, exciting force is found out, and this exciting force is transmitted to the car body 10 by an actuator 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device,
In particular, the present invention relates to a vibration control device that damps vibrations of a vehicle body equipped with an engine.

[0002]

2. Description of the Related Art An engine is mounted on a vehicle body through an engine mount.
At this time, the exciting force Fe generated by the engine is expressed by the following formula 1 excluding the DC component.

[0003]

[Equation 1] However, n = 1,2,3, is a ···, a _n is the amplitude,
ω is frequency, t is time, and δ _n is initial phase. Also,
The force transmitted from the engine to the vehicle body via the engine mount is represented by the following mathematical expression 2.

[0004]

[Equation 2] This engine mount is a component that is difficult to design because it supports the weight of the engine and has a vibration damping function. Therefore, it is the current situation that the engine mount alone does not provide a sufficient anti-vibration function.

In addition to the engine vibration, many vibrations of the vehicle body occur. For example, there are many vibrations such as shake vibrations due to the imbalance of tires, and a vibration damping function for damping these vibrations is required.

The present invention has been made to solve the above-mentioned problems, and it is possible to minimize the vibration of the vehicle body by attenuating the vibration transmitted to the vehicle body from the vibration source other than the engine and the vibration source. An object is to provide a control device.

[0007]

In order to achieve the above object, the present invention provides a first detecting means for detecting an engine explosion and a plurality of cycles each of which is an integral multiple of the engine explosion cycle and each of which has a different cycle. A first generation unit configured to generate a first waveform and a plurality of second waveforms having a cycle similar to that of the first waveform and having a phase difference with respect to the first waveform; First correcting means for correcting the amplitude of the first waveform and the amplitude of the second waveform so as to attenuate the vibration of the member to be transmitted, and the second correcting means for detecting periodic vibration other than the explosion of the engine. And a plurality of third waveforms each having a cycle that is an integral multiple of the cycle of the periodic vibration and has a different cycle.
The periodic vibration is transmitted to a second generation unit that generates a plurality of fourth waveforms having a cycle similar to that of the third waveform and having a phase difference with respect to the third waveform. Second correcting means for correcting the amplitude of the third waveform and the amplitude of the fourth waveform so that the vibration of the member is attenuated, and the first waveform and the second waveform corrected by the first correcting means. Calculating means for calculating a combined waveform in which a plurality of waveforms and the third waveform and the fourth waveform corrected by the second correcting means are combined, and the exciting force generated based on the combined waveform And a transmission means for transmitting to the member.

[0008]

In general, a PE characteristic (P
However, in the case of engine vibration, only inputs related to the cycle of engine explosion are generated. Also, in the case of periodic vibrations other than engine explosion, only inputs related to the periodic vibration period are generated.
Focusing on this point, the present invention attenuates vibration by utilizing only the input components related to the cycle of engine explosion and the cycle of vibration other than the cycle of engine explosion.

The first detecting means of the present invention detects the explosion of the engine. The first generation means generates a plurality of first waveforms and a plurality of second waveforms. The first waveform has a cycle that is an integral multiple of the explosion cycle of the engine and has a different cycle, and the second waveform has a cycle similar to that of the first waveform and a phase difference with respect to the first waveform. It is a waveform with. First
The correcting means corrects the amplitude of the first waveform and the amplitude of the second waveform so that the vibration of the member to which the engine vibration is transmitted is attenuated.

The second detecting means detects periodic vibrations other than explosion of the engine. The second generation means generates a plurality of third waveforms and a plurality of fourth waveforms. The third waveform is a waveform whose period is an integral multiple of the vibration period detected by the second detecting means and has a different period, and the fourth waveform is
The waveform has a period similar to that of the third waveform and has a phase difference with respect to the third waveform. The second correction means corrects the amplitude of the third waveform and the amplitude of the fourth waveform so that the vibration of the member to which the periodic vibration is transmitted is attenuated.

The arithmetic means is a composite wave obtained by combining a plurality of first waveforms, second waveforms, third waveforms and fourth waveforms corrected by the first correction means and the second correction means. Is calculated. Then, the transmission means transmits the exciting force generated based on the combined waveform to the member to which each vibration is transmitted. As described above, the present invention utilizes the waveforms related to the cycle of engine explosion and the cycle of vibration other than the cycle of engine explosion, that is, the regularity of the explosive force of the engine and the regularity of the periodic vibration. Therefore, the transfer characteristic of the system, that is, the amplitude can be corrected by the first correction means and the second correction means with a simple configuration.

Further, since the waveform related to the engine explosive force and the waveform related to the vibration other than the engine vibration are used, it is possible to perform control excluding the exciting force and noise other than the explosive force and the periodic vibration, Vibration of the car body can be minimized.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the vibration control device of the present invention will be described with reference to FIGS.

As shown in FIG. 1, an engine 14 is mounted on a vehicle body 10 via an engine mount (not shown). A pulse sensor 16 that detects an engine explosion pulse is connected to the engine 14. A pickup or the like can be used as the pulse sensor 16, but a microcomputer for calculating the ignition timing of the engine may be used as the pulse sensor and the ignition timing may be used as the explosion pulse. Also, as explained below,
Although the frequency of the explosion pulse is obtained from the output of the pulse sensor 16, the frequency of the explosion pulse may be obtained from the explosion pulse of the engine 1 cylinder, and in the case of a multi-cylinder engine or the like, the cylinder of the frequency of the explosion pulse of the entire engine is obtained. A fraction
May be the frequency of the explosion pulse. The pulse sensor 16 is connected to the control circuit 22.

Further, the suspension of the vehicle body 10 or the bearing of the tire shaft is provided with a pulse sensor 116 for detecting the rotational speed of the tire 12. The pulse sensor 116 is connected to the control circuit 22.

The vehicle body 10 is provided with a vibration sensor 18 for detecting the vibration of the vehicle body 10 and an actuator 20 for transmitting the vibration to the vehicle body 10. The vibration sensor 18 is connected to the buffer amplifier 74 via the overvoltage protection circuit 72, and the buffer amplifier 74 is connected to the control circuit 22. The actuator 20 is also connected to the control circuit 22.

Next, details of the control circuit 22 will be described with reference to FIGS. The control circuit 22 will be described below by describing a general formula and a control circuit using this general formula for the sake of simplicity.

As shown in FIG. 2, the control circuit 22 includes
Oscillator 30 connected to pulse sensor 16₁, 30₂・
・ ・ 30_nIs equipped with. This oscillator 30₁Is sin
(Ω _EOutput the waveform of t). Also, the oscillator 30₂Is
sin (2ω_EOutput the waveform of t). Below oscillator 30
_nIs sin (nω_EOutput the waveform of t). However, n
Is an integer, ω_EIs calculated from the output of the pulse sensor 16
The frequency of the explosion pulse of the engine, t is time. Oscillator
Thirty₁Is an overvoltage protection circuit 32₁And buffer amplifier 3
Four₁Through the multiplier 36₁And multiplier 38₁Connected to and
ing. Multiplier 38₁Is a predetermined coefficient −γ_1ETo
Multiplier 40 for multiplication₁And integrator 42₁Through the multiplier
36₁It is connected to the.

Oscillator 30₂Is an overvoltage protection circuit 32₂Over
And buffer amplifier 34₂Through the multiplier 36₂And multiplier
38₂Connected to. Multiplier 38₂Is predetermined
Coefficient −γ_2EMultiplier 40 for multiplying by₂And integrator 4
Two₂Through the multiplier 36₂It is connected to the. Same as below
Oscillator 30_nIs an overvoltage protection circuit 32_nAnd buffer
Amplifier 34_nThrough the multiplier 36_nAnd multiplier 38_nAnd to
It is connected. Multiplier 38_nIs a predetermined coefficient
-Γ_nEMultiplier 40 for multiplying by_nAnd integrator 42 _nThrough
Multiplier 36_nIt is connected to the.

The control circuit 22 also includes oscillators 50 ₁ , 50 ₂ ... 50 _n connected to the pulse sensor 16. The oscillator 50 ₁ outputs a waveform of cos (ω _E t). The oscillator 50 ₁ includes a multiplier 56 ₁ and a multiplier 58 ₁ via an overvoltage protection circuit 52 ₁ and a buffer amplifier 54 _1.
Connected to ₁ and. The multiplier 58 ₁ includes a multiplier 60 ₁ and an integrator 62 ₁ that multiply a predetermined coefficient −ξ _1E.
Is connected to the multiplier 56 ₁ via.

Oscillator 50₂Is an overvoltage protection circuit 52₂Over
And buffer amplifier 54₂Through the multiplier 56₂And multiplier
58₂Connected to. Multiplier 58₂Is predetermined
Coefficient −ξ_2EMultiplier 60 for multiplying by₂And integrator 6
Two₂Through the multiplier 56₂It is connected to the. Same as below
Oscillator 50_nIs an overvoltage protection circuit 52_nAnd buffer
Amplifier 54_nThrough the multiplier 56_nAnd multiplier 58_nAnd to
It is connected. Multiplier 58_nIs a predetermined coefficient
−ξ_nEMultiplier 60 for multiplying by_nAnd integrator 62 _nThrough
The multiplier 56_nIt is connected to the.

Further, the control circuit 22 operates from the buffer amplifier 74 connected to the vibration sensor 18 to the multipliers 38 ₁ and 38 _2.
... 38 _n and multipliers 58 ₁ , 58 ₂ ... 58 _n , respectively. Multipliers 36 ₁ , 36 ₂ ...
36 _n and the multipliers 56 ₁ , 56 _2, ... 56 _n are connected to the adder 80, which is connected to the actuator 20 via the output control circuit 82.

On the other hand, as shown in FIG. 3, the control circuit 2
2 is an oscillator 13 connected to the pulse sensor 116
0₁, 130₂... 130_nIs equipped with. This oscillation
Vessel 130 ₁Is sin (ω_TOutput the waveform of t). Well
Oscillator 130₂Is sin (2ω_Tt) waveform is output
Force Similarly, the oscillator 130_nIs sin (nω_T
Output the waveform of t). Where n is an integer, ω_TIs a pulse
Of the engine explosion pulse calculated from the sensor 16 output
Frequency, t is time. Oscillator 130₁Is an overvoltage
Protection circuit 132₁And buffer amplifier 134₁Ride through
Calculator 136₁And multiplier 138₁Connected to. Riding
Calculator 138₁Is a predetermined coefficient −γ_1TMultiply by
Multiplier 140₁And integrator 142₁Through the multiplier 13
6₁It is connected to the.

The oscillator 130 ₂ has an overvoltage protection circuit 132.
₂ and the buffer amplifier 134 ₂ through the multiplier 136 ₂
And multiplier 138 ₂ . Multiplier 138 ₂
Is a multiplier 140 for multiplying a predetermined coefficient −γ _2T
It is connected to the multiplier 136 ₂ via ₂ and the integrator 142 ₂ . Similarly, the oscillator 130 _n is connected to the multiplier 136 _n and the multiplier 138 _n via the overvoltage protection circuit 132 _n and the buffer amplifier 134 _n . The multiplier 138 _n includes multipliers 136 through a multiplier 140 _n and the integrator 142 _n for multiplying a coefficient-gamma _nT predetermined _n
It is connected to the.

Further, the control circuit 22 uses the pulse sensor 116.
Oscillators 150 ₁ , 150 _2, ... 150 _n connected to
Is equipped with. This oscillator 150 ₁ has cos (ω _T t)
The waveform of is output. Oscillator 150 _1, the multiplier 1 via the overvoltage protection circuit 152 ₁ and the buffer amplifier 154 ₁
56 ₁ and the multiplier 158 ₁ . Multiplier 1
58 ₁ is connected to the multiplier 156 ₁ via the multiplier 160 ₁ and the integrator 162 ₁ which multiply the predetermined coefficient −ξ _1T .

The oscillator 150 ₂ has an overvoltage protection circuit 152.
₂ and the buffer amplifier 154 ₂ through the multiplier 156 ₂
And multiplier 158 ₂ are connected. Multiplier 158 ₂
Is a multiplier 160 for multiplying a predetermined coefficient −ξ _2T
It is connected to the multiplier 156 ₂ via ₂ and the integrator 162 ₂ . Similarly, the oscillator 150 _n is connected to the multipliers 156 _n and 158 _n via the overvoltage protection circuit 152 _n and the buffer amplifier 154 _n . The multiplier 158 _n multiplies a predetermined coefficient −ξ _nT by a multiplier 160 _n and an integrator 162 _n to multiply the multiplier 156 _n.
It is connected to the.

Further, the control circuit 22 operates from the buffer amplifier 74 connected to the vibration sensor 18 to the multipliers 138 ₁ , 13.
8 ₂ ... 138 _n and multipliers 158 ₁ , 158 _2, ...
-Connected to 158 _n respectively. Multiplier 13
6 ₁ , 136 ₂ ... 136 _n and multiplier 156 ₁ , 1
56 ₂ ... 156 _n are respectively connected to the adder 180, and the adder 180 is connected to the output control circuit 82.

Next, the operation of this embodiment will be described.
In the vibration control device of the present embodiment, the engine explosion pulse detected by the pulse sensor 16 is generated by the oscillators 30 ₁ , 30 _2.
Are input to the · · 30 _n and the oscillator _{50 1, 50 2 ··· 50 n} . The oscillator 30 ₁ has a waveform sin (ω) having a frequency that is an integral multiple of the frequency of the explosion pulse of the engine 14.
And outputs the _E t). Further, the oscillator 50 ₁ has sin (ω
Waveform cos (ω) whose phase is shifted by 90 degrees with respect to _E t)
And outputs the _E t). Waveform s output from oscillator 30 _1.
in (ω _E t) is input to the multiplier 36 ₁ and the multiplier 38 ₁ via the overvoltage protection circuit 32 ₁ and the buffer amplifier 34 _1. The amplitude Y (t) of the vibration of the vehicle body 10 detected by the vibration sensor 18 is input to the multiplier 38 ₁ via the overvoltage protection circuit 72 and the buffer amplifier 74.

The multiplier 38 ₁ multiplies the waveform sin (ω _E t) and the amplitude Y (t), and the multiplier 40 ₁ is the multiplier 38 ₁
The output is multiplied by the coefficient −γ _1E , and the integrator 42 ₁ outputs the multiplier 40
_One output is integrated and output as the amplitude A _1E (t). This A _1E (t) is as shown in _Equation 3.

Further oscillator 30 _2, like the oscillator 30 _1, output from the oscillator 30 ₂ waveform sin (2 [omega
_E t) is the overvoltage protection circuit 32 ₂ and the buffer amplifier 34
It is input to the multiplier 36 ₂ and the multiplier 38 ₂ via ₂ . In the multiplier 38 ₂ , the amplitude Y (t) of the vibration of the vehicle body 10 detected by the vibration sensor 18 is detected by the overvoltage protection circuit 72.
And the buffer amplifier 74.

The multiplier 38 ₂ has a waveform sin (2ω _E t)
And the amplitude Y (t) are multiplied, and the multiplier 40 ₁
The coefficient-gamma _2E multiplies the _second output, the integrator 42 ₂ multiplier 4
The 0 ₂ output is integrated and output as the amplitude A _2E (t). This A _2E (t) is as shown in _Equation 3. Further oscillator 30 _n
Similarly, the amplitude A _nE (t) is as shown in _Formula 3.

[0032]

[Equation 3] Oscillator 50 ₁ output from the waveform cos (ω _E t) is input to the multiplier 56 ₁ and the multiplier 58 ₁ via the overvoltage protection circuit 52 ₁ and the buffer amplifier 54 _1. The amplitude Y (t) of the vibration of the vehicle body 10 detected by the vibration sensor 18 is input to the multiplier 58 ₁ via the overvoltage protection circuit 72 and the buffer amplifier 74.

The multiplier 58 ₁ multiplies the waveform cos (ω _E t) and the amplitude Y (t), and the multiplier 60 ₁ multiplies the multiplier 58 _{1 by}
The output is multiplied by the coefficient −ξ _1E , and the integrator 62 ₁ is multiplied by the multiplier 60.
_One output is integrated and output as the amplitude B _1E (t). This B _1E (t) is as shown in _Equation 4.

Further oscillator 50 _2, like the oscillator 50 _1, waveforms outputted from the oscillator 50 ₂ cos (2 [omega
_E t) is the overvoltage protection circuit 52 ₂ and the buffer amplifier 54
It is input to the multiplier 56 ₂ and the multiplier 58 ₂ via ₂ . In the multiplier 58 ₂ , the amplitude Y (t) of the vibration of the vehicle body 10 detected by the vibration sensor 18 is supplied to the overvoltage protection circuit 72.
And the buffer amplifier 74.

The multiplier 58 ₂ has a waveform cos (2ω _E t)
And the amplitude Y (t) are multiplied, and the multiplier 60 _1
2 outputs are multiplied by a coefficient −ξ _2E , and the integrator 62 ₂ is a multiplier 6
The 0 ₂ output is integrated and output as the amplitude B _2E (t). This B _2E (t) is as shown in _Equation 4. Further oscillator 50 _n
Similarly, the amplitude B _nE (t) of the waveform cos (nω _E t) of _Eq .

[0036]

[Equation 4] As can be understood from the above Equations 3 and 4, the amplitude A
_nE (t) and _BnE (t) include the amplitude Y (t) of the vibration of the vehicle body 10 (engine vibration). Further, the target value of the vibration amplitude of the vehicle body 10 is set to 0 (to minimize the vehicle body vibration).
Then, the error e becomes e = 0-Y (t), and the amplitude Y (t) of the vibration of the vehicle body 10 detected by the vibration sensor 18 is 0.
The vibration of the vehicle body 10 can be minimized by determining the amplitudes A _nE (t) and B _nE (t) so that

The multiplier 36 ₁ multiplies the output of the buffer amplifier 34 _{1 and the} output of the integrator 42 ₁ , and the multiplier 56 ₁ multiplies the output of the buffer amplifier 54 _{1 and the} output of the integrator 62 ₁ .
The multiplier 36 ₂ multiplies the buffer amplifier 34 ₂ output and the integrator 42 ₂ output, and the multiplier 56 ₂ multiplies the buffer amplifier 54 ₂ output and the integrator 62 ₂ output. Multiplier 3
6 _n and the multiplier 56 _n are then similarly processed. And
The adder 80 outputs the waveform shown by the equation 5 in which the outputs of the multipliers 36 ₁ , 36 ₂ ... 36 _{n and the} outputs of the multipliers 56 ₁ , 56 ₂ ... 56 _n are added.

[0038]

[Equation 5] On the other hand, the periodic vibration pulses detected by the pulse sensor 116 are input to the oscillators 130 ₁ , 130 ₂ ... 130 _n and the oscillators 150 ₁ , 150 ₂ ... 150 _n , respectively. The oscillator 130 ₁ outputs a waveform sin (ω _T t) having a frequency that is an integral multiple of the frequency of the shake vibration pulse due to the imbalance of the tire 12. The oscillator 150 ₁ has a waveform co whose phase is shifted by 90 degrees with respect to sin (ω _T t).
Output s (ω _T t). The waveform sin (ω _T t) output from the oscillator 130 ₁ is input to the multiplier 136 ₁ and the multiplier 138 ₁ via the overvoltage protection circuit 132 ₁ and the buffer amplifier 134 ₁ . This multiplier 138 ₁ has
Amplitude Y of vibration of the vehicle body 10 detected by the vibration sensor 18
(T) is input via the overvoltage protection circuit 72 and the buffer amplifier 74.

The multiplier 138 ₁ has a waveform sin (ω _T t)
And the amplitude Y (t) are multiplied, and the multiplier 140 ₁ is the multiplier 1
The 38 ₁ output is multiplied by the coefficient −γ _1T , and the integrator 42 ₁ integrates the output of the multiplier 40 _{1 and} outputs it as the amplitude A _1T (t). This A _1T (t) is as shown in _Equation 6.

Further, the oscillator 130₂Is the oscillator 130₁Same as
Oscillator 130₂The waveform sin (2ω
_Tt) is an overvoltage protection circuit 132₂And buffer amplifier 1
34 ₂Through the multiplier 136₂And multiplier 138₂Enter
I will be forced. This multiplier 138 ₂In the vibration sensor 18
The detected vibration amplitude Y (t) of the vehicle body 10 is overvoltage protected.
It is input via the circuit 72 and the buffer amplifier 74.

The multiplier 138 ₂ has a waveform sin (2ω
_T t) is multiplied by the amplitude Y (t), the multiplier 140 ₁ multiplies the output of the multiplier 138 ₂ by the coefficient −γ _2T , and the integrator 142
₂ integrates the output of the multiplier 140 _{2 and} outputs it as the amplitude A _2T (t). This A _2T (t) is as shown in _Equation 6. Further, the amplitude A _nT (t) of the oscillator 130 _{n is} also expressed by the equation 6.

[0042]

[Equation 6]Oscillator 150₁Waveform cos (ω output from_Tt) is
Overvoltage protection circuit 152 ₁And buffer amplifier 154₁To
Through the multiplier 156₁And multiplier 158₁Entered in
It This multiplier 158₁Is detected by the vibration sensor 18.
The amplitude Y (t) of the vibration of the vehicle body 10 is
2 and the buffer amplifier 74.

The multiplier 158 ₁ has a waveform cos (ω _T t)
And the amplitude Y (t) are multiplied, and the multiplier 160 ₁ is the multiplier 1
The 58 ₁ output is multiplied by the coefficient −ξ _1T , and the integrator 162 ₁ integrates the output of the multiplier 160 _{1 and} outputs it as the amplitude B _1T (t). This B _1T (t) is as shown in _Equation 7.

Further, the oscillator 150₂Is the oscillator 150₁Same as
Like the oscillator 150₂The waveform cos (2ω
_Tt) is an overvoltage protection circuit 152₂And buffer amplifier 1
54 ₂Through the multiplier 156₂And multiplier 158₂Enter
I will be forced. This multiplier 158 ₂In the vibration sensor 18
The detected vibration amplitude Y (t) of the vehicle body 10 is overvoltage protected.
It is input via the circuit 72 and the buffer amplifier 74.

The multiplier 158 ₂ has the waveform cos (2ω
_T t) is multiplied by the amplitude Y (t), the multiplier 160 ₁ multiplies the output of the multiplier 158 ₂ by the coefficient −ξ _2T , and the integrator 162
₂ integrates the output of the multiplier 160 _{2 and} outputs it as an amplitude B _2T (t). This B _2T (t) is as shown in _Equation 7. In addition, the amplitude B _nT (t) of the waveform cos (nω _T t) of the oscillator 150 _n is also as shown in Expression 7.

[0046]

[Equation 7] As understood from the above equations 6 and 7, the amplitude A
_nT (t) and B _nT (t) include the amplitude Y (t) of the vibration of the vehicle body 10 (engine vibration). Further, the target value of the vibration amplitude of the vehicle body 10 is set to 0 (to minimize the vehicle body vibration).
Then, the error e becomes e = 0-Y (t), and the amplitude Y (t) of the vibration of the vehicle body 10 detected by the vibration sensor 18 is 0.
The vibration of the vehicle body 10 can be minimized by determining the amplitudes A _nT (t) and B _nT (t) so that

The multiplier 136 ₁ is a buffer amplifier 134 ₁
The output is multiplied by the output of the integrator 142 ₁ to obtain a multiplier 156 ₁
Multiplies the output of the buffer amplifier 154 _{1 and the} output of the integrator 162 ₁ . Further, the multiplier 136 ₂ is a buffer amplifier 13
The 4 ₂ output is multiplied by the integrator 142 ₂ output to obtain the multiplier 15
6 ₂ multiplies the output of the buffer amplifier 154 _{2 and the} output of the integrator 162 ₂ . Further, the multiplier 136 _n and the multiplier 15
6 _n is similarly performed below. The adder 180 outputs the multipliers 136 ₁ , 136 ₂ ... 136 _n and the multiplier 1
56 ₁ , 156 ₂ ... 156 _n output added number 8
The waveform shown in is output.

[0048]

[Equation 8] The output control circuit 82 combines the waveforms by adding a predetermined number of outputs from the adder 80 and the adder 180, and controls the actuator 20 based on the combined waveform. Accordingly, the vehicle body 10 is formed by using the waveform related to the cycle of the engine explosion and the waveform related to the cycle of the shake vibration due to the unbalance of the tire, that is, the waveform related to the engine explosive force and the waveform related to the shake vibration.
The vibration of can be dampened. Therefore, the vehicle body 10
Attenuating the vibration of the engine eliminates the muffled noise caused by the vibration and resonance during idling and the shake vibration due to the imbalance of the tire.

Further, since only the waveform related to the engine explosive force and the waveform related to the number of rotations of the tire are used, it is possible to perform control excluding the exciting force and noise other than the explosive force and the periodic vibration, and control. Improves stability.

In the above description, the general formula and the control circuit using the general formula have been described for the sake of simplicity.
Actually, a predetermined number m from n = 1 (for example, 4, 6)
Etc.) using several oscillators, multipliers, adders, etc.
A predetermined m number of waveforms indicated by 0 are formed, and the output control circuit 82 synthesizes the respective waveforms according to the equation shown in Eq.

[0051]

[Equation 9]

[0052]

[Equation 10]

[0053]

[Equation 11] In the above, the waveform having a frequency that is an integral multiple of the frequency is a sine wave, but a rectangular wave or a triangular wave may be used. Further, although the phase difference is set to 90 degrees which is the most effective, if the phase difference is in the vicinity of 90 degrees, practically no problem can be obtained. Furthermore, in the above, the frequency of the explosion is detected from the explosion pulse of the engine, and a waveform whose cycle is an integral multiple of the explosion cycle is generated, but the cycle of the explosion is detected from the explosion pulse of the engine and the cycle is A waveform or the like that is an integral multiple may be generated. Further, in the above description, an example in which a control circuit is used using an oscillator, a multiplier, an adder, etc. has been described, but a microcomputer may be used to control the actuator.

Further, in the above description, the vibration pulse of the shake vibration due to the imbalance of the tire is detected, but the invention is not limited to this, and any vibration pulse of periodic vibration of the propeller shaft or the like can be applied. Furthermore, it is also possible to use a plurality of the second detecting means. That is, by using a plurality of second detecting means, a plurality of vibration pulses can be measured, and a plurality of vibrations can be damped based on these vibration pulses.

[0055]

The vibration control device of the present invention synthesizes a waveform whose cycle is an integral multiple of the engine explosion cycle and a waveform whose cycle is an integral multiple of the periodic vibration cycle other than the engine explosion cycle. Since the vibration of the engine and the vibration of the member to which periodic vibrations other than the engine vibration are transmitted is dampened by synthesizing the one with the one, it is possible to determine the transmission characteristic of the system with a simple configuration. Can be minimized. In addition, since it is possible to perform control excluding vibration force and noise other than engine explosive force and periodic vibration, it is possible to obtain an excellent effect that control can be performed with high safety.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of a control circuit that damps the vibration of the vehicle body with respect to the vibration of the engine of FIG.

FIG. 3 is a block diagram of a control circuit that damps vibration of a vehicle body against shake vibration due to unbalance of the tire of FIG.

[Explanation of symbols]

 10 vehicle body 12 tire 14 engine 16 pulse sensor 18 vibration sensor 20 actuator 22 control circuit 116 pulse sensor

Claims (1)

[Claims] 1. A first detection means for detecting an engine explosion, a plurality of first waveforms each having a cycle that is an integral multiple of the engine explosion cycle and each having a different cycle, and a cycle similar to the first waveform. And a first generating means for generating a plurality of second waveforms having a phase difference with respect to the first waveform, and the first generating means for damping vibration of a member to which engine vibration is transmitted. A first correcting means for correcting the amplitude of the waveform and the amplitude of the second waveform; and a second detecting means for detecting periodic vibrations other than the explosion of the engine.
And a plurality of third waveforms each having a cycle that is an integer multiple of the cycle of the periodic vibration and each of which has a different cycle, and a cycle having a cycle similar to that of the third waveform and the third waveform. Second generating means for generating a plurality of fourth waveforms having a phase difference, and the amplitude of the third waveform and the fourth waveform so as to attenuate the vibration of the member to which the periodic vibration is transmitted. Second waveform correction means for correcting the amplitude of the waveform, the first waveform and the second waveform corrected by the first correction means, and the third waveform and the third waveform corrected by the second correction means. A vibration control device comprising: a calculating unit that calculates a combined waveform that combines a plurality of the waveforms of 4 and a transmitting unit that transmits an exciting force generated based on the combined waveform to the member.