A control method and system for precise positioning of linear motion of translational turnout

Abstract

The invention relates to a control method and system for accurate positioning of the linear movement of a translational turnout. The control method comprises the steps that firstly, target values of pulse count among all turning positions of the turnout are determined, and actual measurement is conducted through operation of the turnout; under the situation that the turnout is unlocked in place, a motor is controlled to be in a zero-speed high-torque output state by a frequency converter; a brake is opened by a PLC; the driving direction of the motor and the target value of pulse count are determined by the PLC; the pulse count value in the turning process is read in by the PLC; the pulse count value and the target value of the pulse count are compared through the PLC, and parameters are determined and transmitted to the frequency converter; the motor is controlled to rotate by the frequency converter, and a turnout beam is made to conduct linear movement along a track through a transmission mechanism. The control system comprises the PLC, the frequency converter, the motor, a pulse distributor and the transmission mechanism. By means of the control method, the requirement for the positioning detection of the linear movement of the translational turnout can be met; by means of the control system, the positioning accuracy in the turning process of the turnout can be improved, and the impact to the transmission mechanism when the turnout is started and stopped at large inertia can be reduced.

Description

technical field [0001] The invention relates to the technical field of rail transit equipment, in particular to a control method and system for precise positioning of linear motion of a translation switch. Background technique [0002] Translational turnout is a kind of rail transit equipment, which is an important equipment for vehicles to enter and leave the warehouse and change lines. Generally, the active traveling beam and the driven traveling beam connect the turnout beams (usually two to three) that match the line into one, and are driven by a motor reducer fixed on the ground. Displacement, the four wheels of the turnout roll on the two square steel rails, so that the turnout beams are interchanged and the lines are docked, and the vehicles enter and exit the warehouse and change lines. There are guide wheels under the active traveling beam, which are clamped on both sides of the track to prevent the turnout from drifting; an electric push rod is installed on the bo...

AI Technical Summary

Problems solved by technology

[0004] At present, the linear motion control of the translational turnout adopts the relay logic control, and the limit switch judges whether the translational movement of the turnout is in place. It has the disadvantages of large impact when starting and stopping, low positioning accuracy (not more than 10mm), and no intermediate process monitoring.

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