SU750175A1 - Method of suppressing elasticity force oscillations in nature - Google Patents

Description

37301

fluctuations in dynamic component-hey elastic forces.

The present invention is to reduce the dynamic and limit the static component of the elastic forces independently of each other.

This is achieved by measuring the speed of rotation of the output shaft of the drive shaft and, in proportion to it, setting the speed of the engine idle code, is a parameter that influences the force of the transmission rigidity, taking into account the coefficient of proportionality between the rotation speed of the driven shaft and the idling speed engine., 15

In addition, in order to compensate for the inertia of the drive and its control system, the specified idling speed of the engine is adjusted depending on the rotation speed of the driven shaft.

The drawing is a structural cx.eisfa method.

Engine 1, through transmission. 2 is connected to the drive driven shaft 3 and is loaded with a twin angular speed drive 4, the signal from which is fed to the rotational speed controller of the engine 5 and the correction device 6. The correction device 6 may contain the differential 30 device 7 and the amplifier 8, and the motor speed controller 5 - the amplifier 9, the actuator 1O, and the adding device 11, the input to which is connected to the outputs of the amplifiers 8 and 9, 35, and the output to the actuator 10.

When implementing the proposed method, the rotational speed of the driven: drive shaft 3 is measured and proportional to it, the idle speed of the engine 1 is given. At the same time, the proportionality factor between the drive speed of the driven shaft 3 and the speed of the engine 1 is taken into account; static third component of the elastic force in the transmission 2, it is necessary to overcome the static moment of the load.

Ll of compensation of inertia of drive - so and the control system in the corrective device 6 corrects the set idling speed. moving bodies 1 depending on the speed of rotation of the driven shaft 3.55

Indeed, if engine 1 has an e absolutely rigid M9khanrgchesk5 yu54

performance, then this time on the shaft can be represented as

(-,).(one)

where k is ps;

(jj - fw: t1ieska: angular velocity

engine 1: W - angular idle speed of the engine 1. When implementing the method, set

(2;

 KU7.,

Uj

lo

and.) „angular speed of rotation of the driven shaft 3

K is the coefficient of proportionality, which is determined by the required engine slip S required for coedan; ng of a certain static moment on the shaft of the driver 6.

h)

, -,

Then, taking into account that in the static of (1) the term

L-A (1 fj (4)

that is, the static moment on the motor shaft 1, and, therefore, the static component of the elastic force is proportional to the ratio of the rotational speeds of the driving shaft 3 of the drive and the idling speed of the engine 1.

CimTea corrective-device can be given either by frequency using the methods of automatic control theory, or based on the theory of optimal control for any automatic control systems of any type of drive.

For example, for a frequency-controlled asynchronous electric drive, the expression for the corrected signal looks like the following

(7)

((- p uj, where the acceleration of the rotational speed of the driven shaft 3 of the drive is consistent, depending on the parameters of the electromechanical system, engine, actuating mechanism.

Then, the implementation of the proposed method for damping the oscillations of the elastic forces in the transmission 2 with engine control 1 involves measuring the speed of rotation of the driven shaft 3 of the drive and, in proportion to it, sets the idling speed of engine 1, which is para-PpOMf influencing the trans elastic force 57501

mission, taking into account the coefficient of proportionality between the speed of rotation of the driven shaft 3 drive and the engine idle speed, the output signal of the amplifier 9 is fed to j summing device In the correction device 6, by differentiating the signal from the speed sensor 4 in the differentiating device 7 and multiplying by the specified the coefficient (V) io in the amplifier 8, forms a correction signal, which is fed to the summing device 11.

The output of summing device 11 goes to executive device 15 (with frequency control of an asynchronous motor — frequency converter) speed controller of motor 5, whereby set the idling speed of the motor; 1 UJ, Q, 20

When the load on the driven shaft 3 of the drive increases, causing, due to the deformation of the transmission 2, reducing its rotational speed, reduce the speed of the idling engine 1, and when falling by 25 loads, causing deformation of the transmission 2, increasing the rotational speed of the driven ala drive 3, increase idle speed: engine running 1.30

Thus, the idle speed of the engine 1 is set by the speed of rotation of the driven shaft 3 of the drive. Setting the speed of the idling of the engine 1 by the speed of rotation of the actuator leads to tracking of the actual speed of the engine 1 following the speed of the driven shaft of the drive 3, which results. reduce the amplitude of the dynamic composition-40

756

l Toshi forces of elasticity and breakdown of self-oscillations in the system system

Claims (2)

1. The method of damping the oscillations of elastic forces in the drive, which consists in changing the parameter that affects the force of elasticity of the transmission of the driven shaft of the module, depending on from its speed, that is, and with that, 4TOj, in order to reduce the dynamic and limit the static components of the elastic forces independently of each other, the rotational speed of the driven drive shaft is measured and, in proportion to it, the engine idling speed The parameter influencing the transmission elasticity vortex, taking into account the coefficient of arresting between the speed of rotation of the driven shaft of the drive and the speed of idling of the engine. 2. The method of damping oscillations according to claim 1, which differs in that, in order to compensate for the inertia of the drive and control system, it adjusts the set idling speed of the two engines, depending on the speed of rotation of the driven shaft. Sources of information taken into account in the examination 1, A. Dokukin, et al. Methods and means of reducing dynamic loads. in drives of excavation machines. Mining machines and automation, 1962, No. 2, p. 110, 2. Authors svgsechetelsttso USSR № 168965, cl. F 01T) 17 / 1O, 1965 (prototype). Uj Ha2pydl l z 3