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Control system of automatic transmission actuating mechanism

A technology of automatic transmission and actuator, applied in electric controllers, controllers with specific characteristics, etc., can solve problems such as long response time

Active Publication Date: 2017-06-13
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the transmission system, when the control current of the solenoid valve changes, the opening of the solenoid valve will change. Since the magnetic point is in a static state when the opening of the solenoid valve is relatively stable, when the opening of the solenoid valve changes, the magnetic point will change from The response time from stationary to moving can be too long

Method used

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  • Control system of automatic transmission actuating mechanism
  • Control system of automatic transmission actuating mechanism
  • Control system of automatic transmission actuating mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] An embodiment of the present invention provides a control system for an automatic transmission actuator, such as figure 1 As shown, it includes: a PI controller 100, a PWM modulator 200, an actuator 300, and a feedback loop 400; wherein, the feedback loop 400 feeds back the actual signal of the actuator 300 to the PI controller 100, and the The PI controller 100 controls the PWM modulator 200 according to a target signal of the actuator 300 and the actual signal, so as to realize that the actual signal follows the target signal.

[0054] When the actuator 300 is a solenoid valve, the target signal is the target current of the solenoid valve, and the actual signal is the actual current of the solenoid valve. The integral coefficient of the PI controller is obtained by the following formula:

[0055]

[0056] Among them, KI represents the integral coefficient of the PI controller, L C Indicates the inductance of the solenoid valve, V bat Represents the power supply ...

Embodiment 2

[0085] In this embodiment, the actuator 300 is a motor. In this embodiment, the target signal is the target speed of the motor, and the actual signal is the actual speed of the motor. The integral coefficient of the PI controller is obtained by the following formula:

[0086]

[0087] Among them, K IRepresents the integral coefficient of the PI controller, r represents the average resistance of the armature winding of the motor, J represents the moment of inertia of the motor, a represents the gain of the feedback loop, K m Indicates the electromagnetic standard constant of the motor, V bat Indicates the supply voltage of the motor, f s represents the modulation frequency of the PWM modulator, ξ represents the damping ratio of the control system of the automatic transmission actuator, and n represents a positive integer greater than or equal to 3.

[0088] Further, the proportional coefficient of the PI controller is obtained by the following formula:

[0089]

[009...

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Abstract

The invention provides a control system of an automatic transmission actuating mechanism. The control system comprises a PI (proportional plus integral) controller, a PWM (Pulse-Width Modulation) modulator, an actuating mechanism and a feedback circuit, wherein the feedback circuit is used to feed an actual signal of the actuating mechanism back to the PI controller; and the PI controller is used to control the PWM modulator according to an object signal of the actuating mechanism and the actual signal, so that the actual signal follows the object signal. The PI controller acquires the actual signal of the actuating mechanism fed back by the feedback circuit, and the PWM modulator is controlled according to the actual signal and the object signal, so that the aim that the actual signal follows the object signal is realized.

Description

technical field [0001] The invention relates to the field of automatic transmission control, in particular to a control system of an automatic transmission actuator. Background technique [0002] In the transmission system, when the control current of the solenoid valve changes, the opening of the solenoid valve will change. Since the magnetic point is in a static state when the opening of the solenoid valve is relatively stable, when the opening of the solenoid valve changes, the magnetic point will change from The response time from stationary to moving will be too long. Further, since the actuator is in the transmission oil of the transmission, in order to offset the viscosity of the transmission oil and increase the dynamic response of the solenoid valve core, a chatter function is introduced into the solenoid valve control device. Tremor means that when the opening of the solenoid valve is relatively stable, the magnetic point is not allowed to stand still, but the mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 张毅鸣
Owner UNITED AUTOMOTIVE ELECTRONICS SYST