Trajectory Display Device for Motor and Machine End Deviation Analysis
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Solution Overview
Problem
Existing trajectory display methods fail to effectively compare and analyze actual trajectories of the motor end and machine end, making it difficult to determine the cause of deviations between them, as they are typically displayed separately and not overlapped for comparison.
Innovation Solution
A trajectory display device that overlaps the actual trajectories of the motor end and machine end, allowing for central coordinate alignment, enabling easy comparison and identification of the source of deviations by displaying positional information from both ends on the same coordinate system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If actual trajectories of motor end and machine end are displayed separately on different indicators, then each trajectory can be monitored individually, but it becomes difficult to compare and analyze the trajectories and determine the cause of deviations
Solution Approach 1:
The patent merges the separate display indicators for motor end trajectory and machine end trajectory into a single integrated display device. Both trajectories are overlaid on the same coordinate system, allowing operators to visually compare the trajectories and identify deviations caused by mechanical transmission errors between the motor end and machine end.
2Loss of information
If only machine end trajectory is monitored, then trajectory data can be obtained, but it is difficult to discriminate whether fluctuations are due to motor end position fluctuations or mechanical errors in the transmission mechanism
Solution Approach 1:
The patent segments the trajectory monitoring into two distinct components: motor end trajectory (calculated from motor positional data) and machine end trajectory (measured by position measuring instrument). By displaying both segments separately but simultaneously on the same coordinate system, the system enables identification of whether deviations originate from the motor end or the mechanical transmission mechanism.
3Measurement precision
If command trajectory and feedback trajectory are overlapped as in prior art, then feedback error can be monitored, but two different types of actual trajectories (motor end and machine end) cannot be overlapped for comparison
Solution Approach 1:
The display device is designed with multi-functionality to handle multiple trajectory types. It can display command trajectories, feedback trajectories, motor end actual trajectories, and machine end actual trajectories on a single coordinate system. This universal display capability allows for various comparison scenarios including command vs. feedback, motor end vs. machine end, and all combinations thereof.
Data Source
AI summary
A trajectory display device, by which an operator can visually and easily compare actual trajectories of a motor end and a machine end, and can easily determine a reason for deviation between the trajectories. The device has a motor-side position obtaining part which obtains positional information of a motor at predetermined sampling periods of time; a motor end actual coordinate calculating part which calculates an actual coordinate value of the motor end based on mechanical information and the positional information of the motor; a machine end data obtaining part which obtains point sequence data on an actual trajectory of the machine end; and a displaying part which displays and overlaps the actual coordinate of the motor end and the point sequence data of the machine end, as actual trajectories of the motor end and the machine end, so that central coordinates of the trajectories coincide with each other.