SU894742A1 - Device for simulating vibromotor - Google Patents

Description

(S) DEVICE FOR MODELING A PLAYER MOTOR

The invention relates to a semi-natural modeling and can be used for electrical modeling of vibrodigger links. Known vibrating motor, which contains a rotor and a piezoceramic vibrator, elastically fixed in the housing and pressed against the rotor of the joint venture. The closest to the present invention is a device containing a test object mounted on an oscillator, parameter sensors mounted on the object under study and connected to the corresponding inputs of a dynamic system simulation unit and an optimization block an oscillator in the form of mutually perpendicularly installed piezoelectric transducers 2. Disadvantage The known devices lack the ability to synthesize the leading piezoceramic driver. The purpose of the invention is the implementation of the synthesis of the leading piezoceramic engine. To achieve this goal, a vibrating motor simulation device containing a vibrator rotor, a vibrator, a speed sensor, an optimization unit, a harmonic signal generator and a vibrator reverse transfer function unit, a force sensor, two analog memory blocks, a dividing unit, a phase meter and a recording unit are added The dat1 "1K speed, mounted on the moving part of the vibrator, is connected to the input of the first analog storage unit and the first input of the phase meter, a force sensor installed between the moving part of the vibrator and the rotor of the vibromotor, connected to the input of the second analog memory unit and the second input of the phase meter, the output of which is connected to the input of the optimization unit and the first input of the registration unit, the output of the analog memory blocks, respectively, are connected to the inputs of the division flea, the output of which is connected to the second the input of the registration unit, the third input of which is connected to the output of the generator of the gadmy signal, connected via the reverse transfer function unit of the vibrator with the input of the vibrator, and the output of the unit tion is connected to the control input of the harmonic signal generator. The optimization block contains a differentiation element, an adder, a constant voltage master, two diodes, a matching resistor, a trigger and an integrator, the input of the differentiation element being the input of the optimization block, and the output of the differentiation element is connected to the first input of the adder, the second input of which is connected to the first output of the setpoint voltage generator, the second output of which is connected via a matching resistor to the common cathode of two diodes, the anode of the first diode is connected to the output of the adder, and the anode of the second diode is black of flip-flop connected to the input of the integrator, whose output is the output of the optimization unit. The drawing shows a diagram of the proposed device. The device contains a rotor 1, a vibrator 2, a force sensor 3 located between the rotor 1 and the vibrator 2, a speed sensor k located on the movable part of the vibrator, analog memory blocks 5 and 5p, through which k are connected to the outputs of sensors 3 and the inputs of the dividend and a divider of dividing unit 6, a phase meter 7 whose inputs are connected to the inputs of sensors 3 and 4 directly, optimization unit 8, which includes differential element 9, adder 10, constant voltage setting unit 11, two oppositely connected diodes 12 and 13, matching resistor H, flip-flop 15, and integrator 16, signal generator 17 ha monic unit 18 inverse transfer function vibrator via which the generator output 17 to the input of the connections with the vibrator 2 and the block. 19 registration, the individual inputs of which are connected to the outputs of blocks 6 7 and 17. о The proposed device operates as follows. 24 Force sensor 3 generates a signal proportional to the force F of the interaction between the vibrator 2 and the rotor 1, the speed sensor calls a signal proportional to the speed X of the moving part of the vibrator 2. The signals from the outputs of sensors 3 and 4 are fed to analog blocks 5, and 5p of memory, the output of which produces signals proportional to the amplitude values of said forces and speeds, respectively. The signal from the output of block 5i is fed to the input of the divisible division block b, and from the output of block 5) to the input of divider block 6, the output of which is a signal proportional to the ratio of amplitude values F and X, i.e. The second one is equal to the mechanical impedance of the rotor 1. The signals from the outputs of sensors 3 also go to the inputs of the phase meter 7, the output of which produces a voltage that is proportional to the phase difference between the force F and the speed X. This signal goes to the input of the differentiation unit 9 of the optimization unit 8 ui A signal from the output of block 9 which is positive when the phase difference increases and negative when it decreases, It enters the input of the adder 10, the second input of which receives a negative sign voltage from the output of the setpoint 11 constant voltage. The signal at the output of the adder 10 is thus positive, and it becomes negative only when the positive voltage at the output of block 9 exceeds the negative voltage at the output of block 11. The signal from the output of the adder 10 is fed to the input of two opposite-oppositely connected diodes 12 and 13 to the common point of the minus poles of which the negative voltage is connected to the second output of the block 11. When the positive voltage is present at the output of the adder 10, the diode 12 is open and the common point is also a positive voltage. Diode 13 is closed. When the voltage at the output of the totalizer TO becomes negative, diode 12 is closed - and the negative voltage from the external output of the DC block through the resistor 14 and diode 13 is abruptly fed to the counting input of the trigger 15. The trigger changes state and at the same time changes The sign of the voltage at its output. Output voltage from trigger output

8 is fed to the input of the integrator liS, at the output of which an increasing or decreasing voltage is obtained depending on whether a negative or positive voltage is found at the output of the trigger 15. An increasing or decreasing voltage from the integrator output is fed to the control input of the generator 17 at the output which produces a harmonic signal with increasing or decreasing frequency and constant amplitude. The signal from the generator 17 output goes through the vibrator transfer function 18 to the vibrator 2 input. The vibration transfer function 18 is performed depending on the dynamic structure and parameters of the vibrator 2. If, for example, an electrodynamic vibrator is used, the dynamics of which is described by a differential equation second order, in order for the vibrator to transmit oscillations of the generator 17 of a given law and amplitude, the block 18 of the inverse transfer function of the vibrator must be in the form of a filter and with the characteristic that implements the operator, the inverse of the oscillatory one.

With a complicated con () moguration of the rotor 1, the maximum torque transmitted from the gate piezoelectric motor to the rotor is transmitted when the maximum mechanical impedance of the rotor 1 is reached.

(one)

f {-r-

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X Since the mechanical impedance of the rotor increases with the greatest distance from the rotor's own oscillation, it will be greatest with the minimum phase difference between the force F and speed) (/ when the generator frequency 17 is between two adjacent oscillation modes. If, for example, any initial state of the integratbra 16 and the corresponding oscillation frequency of the generator 17 does not correspond to the minimum, and, for example, is less than the minimum point and the trigger 15 is in the state when a negative voltage is present at the output e, it causes an increase in the positive voltage at the output of the integrator 16, thereby increasing the frequency of the generator 17, the phase difference decreases, the voltage at the output of the block 7 decreases, and the output of the block 9 becomes negative. The voltage at the output of the adder 10 is positive, the diode 13 is closed. The trigger 15 is in the same position, and the frequency increases. When the frequency reaches the minimum point of the phase difference and passes it, the voltage at the output of the phase meter 7 at | «1 does not increase and when it exceeds the negative voltage, the incoming From the output of block 9, a negative voltage appears at the output of the differentiation unit, diode 13 opens, a voltage jump is generated and the trigger 15 changes state. The voltage at its output also changes sign, the voltage at the output of integrator 16 decreases, and thus the frequency of the generator 17 decreases. The phase difference decreases, and at the output of block 9, the voltage will be negative until the frequency decreasing, the phase minimum point passes and the phase difference increases. When the output of block 9 reaches a positive voltage higher than negative at the first output of block 11, the trigger 15 changes state and the process repeats. The oscillation around the minimum point of the phases decreases to insignificant, selecting the magnitude of the negative voltage at the first output of the block 11.

If, at the initial position, trigger 15 is in a state where the voltage is positive, the oscillation frequency of the generator decreases, which means the phase difference increases, and the voltage at the output of block 9 is Positive, when the appropriate level is reached, contributes to a change in the state of the trigger 15. and changes the frequency variation leading to the minimum phase difference.

The process of finding the minimum phase difference when establishing the initial state beyond the minimum occurs analogously. Since the piezoceramic motor in the vibromotor should work in resonance, i.e. with the frequency of the first form of oscillations, and it gives the greatest efficiency at maximum

0 of the mechanical impedance of the rotor, the frequency found with the minimum of the phase difference is the frequency at which the propeller should work. And since the first form of the mover is defined by the formula

e f {,) (2) T0, the magnitude of the frequency determines the length of the piezoceramic driver.

To find the possible parameters of the length of the propeller, consider the region between the various forms of oscillation of the rotor. The results are recorded using the registration unit 19, to the inputs of which signals from the outputs of blocks 6, 7 and 17 are proportional to the mechanical impedance module, phase differences and generator frequency 17. According to the registered parameters, in the ranges between different oscillation modes, the one is selected at the minimum difference phases, in which the mechanical impedance is most important. In frequency at this point of the minimum, the parameter E of the mover is selected using formula (2).

The use of the proposed device allows the synthesis of the leading piezoceramic driver according to the maximum impedance and phase characteristics of the rotor and, thereby, by 20-30 increasing the power of the vibromotor and by 2-3% efficiency.

Claims (2)

1. A device for simulating a vibromotor, comprising a rotor of a vibromotor, a vibrator, a speed sensor, an optimization unit, a harmonic signal generator and a reverse transfer function unit of the vibrator, characterized in that, in order to extend the functionality by providing a possible network simulation of the lead piezoceramic driver, additionally, a force sensor, two analog memory blocks, a dividing unit, a phase meter and a recording unit are introduced, with the speed sensor mounted on the movable part in bratra, connected to the input of the first analog memory unit and the first phase meter input, a force sensor installed between the vibrator moving part and the vibrator rotor is connected to the input of the second analog memory unit and the second phase meter input, the output of which is connected to the input of the optimization unit and the first input the registration unit, the outputs of the analog memory blocks, respectively, are connected to the inputs of the division unit, the output of which is connected to the second input of the registration unit, the third input of which is connected to the output of the generator g the harmonic signal is connected via the reverse transfer function unit of the vibrator with the vibrator input, and the output of the optimization unit is connected to the control input of the harmonic signal generator. 2. The apparatus of claim 1, wherein the optimization unit comprises a differentiation element, an adder, a constant voltage setting unit, two diodes a terminating resistor, a trigger and an integrator, the input of the differentiation element being the input of the optimization unit, and the output of the differentiation element is connected with the first input of the adder, the second input of which is connected to the first output of the setpoint generator, the second output of which through the terminating resistor is connected to the common cathode of two diodes, the anode of the first diode is connected to the output of the adder, and the anode of the second diode through a trigger connected to the input of the integrator, the output of which is the output of the optimization block. Sources of information taken into account in the examination 1. Copyright Certificate of the USSR № 6320U, cl. H 01 L 11/10, 1979. 2. USSR Copyright Certificate No. 516056, cl. G 06 G, 1976 (prototype).