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The method of filtering the reverse interference of the torque motor to the controller

A torque motor and controller technology is applied in the field of electro-hydraulic servo valve control to achieve the effects of improving environmental adaptability, improving anti-interference ability and fault monitoring efficiency, and reducing false alarm rate.

Active Publication Date: 2019-05-10
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] After searching, there are a large number of anti-vibration design and vibration characteristic simulation calculation and analysis contents of electro-hydraulic servo valves and controllers in the prior art, which are related to the present invention, but there is no such thing as electro-hydraulic servo valves. Combining with the controller to study and analyze the report of the research on the electro-hydraulic servo valve producing reverse interference to the hardware circuit of the controller under such as fluctuations in oil source pressure, vibration, impact, etc., the present invention passes through the mechanism of this aspect Conducted research, and proposed a design improvement method with operability, which was applied in an actual electro-hydraulic servo control system, and solved the problems existing in the actual system

Method used

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  • The method of filtering the reverse interference of the torque motor to the controller
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  • The method of filtering the reverse interference of the torque motor to the controller

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Embodiment

[0040] This embodiment is applied to an electro-hydraulic servo control system, and a method for filtering the reverse interference of the torque motor to the controller is adopted. The specific process is:

[0041] Step 1, determine the center frequency of the band-stop filter

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Abstract

Provided is a method of filtering reverse interference of a torque motor to a controller. A filter and an interface circuit are improved. A capacitor C2 and a capacitor C3 are connected in series between an operational amplifier N1 and a power triode V2, one end of a resistor R5 is connected to the common connection point between the capacitor C2 and the capacitor C3, and the other end of the resistor R5 is connected to the negative end of a current feedback amplifier circuit, thus forming a high-frequency signal path. A resistor R3 and a resistor R4 are connected in series between the operational amplifier N1 and the power triode V2, the anode end of a capacitor C1 is connected to the common connection point of the resistor R3 and the resistor R4, and the cathode end of the capacitor C1 is connected to the negative end of the current feedback amplifier circuit, thus forming a low-frequency signal path. The method overcomes high false alarm rate of the hydraulic control system in the prior art, and has an obvious effect on an electro-hydraulic servo control system requiring high dynamic response quality.

Description

technical field [0001] The invention relates to the field of electro-hydraulic servo valve control, in particular to a method for filtering reverse interference of a torque motor to a controller. Background technique [0002] The electro-hydraulic servo valve is the core component of the electro-hydraulic servo control system. According to the output controlled by the electro-hydraulic servo valve, it can usually be divided into two types: electro-hydraulic flow servo valve and electro-hydraulic pressure servo valve. hydraulic servo valve, which has a torque motor. figure 1 It is a schematic diagram of the basic structure of the jet tube electro-hydraulic pressure servo valve. There is a magnetic steel 17 on the torque motor, and a fixed magnetic field is generated between the air gap between the pole piece 18 and the armature 19 through the pole piece 18 and the armature 19. After the coil assembly 20 is connected with the control current signal output from the external co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H1/02H03K19/0175
CPCH03H1/02H03K19/017545
Inventor 张谦张颖姝
Owner XIAN AVIATION BRAKE TECH