Working Machine Control Device Memory Mode for Actuator Precision
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Solution Overview
Problem
Operators face challenges in maintaining consistent control of rotational speed for working tools like boring bits in working machines, especially when tasks are interrupted, requiring them to re-establish the desired speed manually.
Innovation Solution
A method and control system that allows operators to memorize and recall inputs for hydraulic actuators, maintaining a constant flow of hydraulic fluid to maintain desired actuator operations, even when the machine is interrupted, using a memory mode activated by a control device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the operator continuously controls the additional control to maintain desired boring bit rotational speed, then the boring bit rotational speed can be maintained at the desired level, but the operator control becomes difficult to sustain for extended periods and requires re-adjustment after task interruptions
Solution Approach 1:
The control device memorizes the operator's input settings in advance (preliminarily stores the control parameters) so that when a task is interrupted and resumed, the memorized settings are automatically recalled and applied without requiring the operator to re-adjust the controls. This eliminates the need for sustained continuous control while maintaining precise boring bit rotational speed.
2Productivity
If the operator manually re-establishes desired speed after task interruption, then the task can resume, but time is lost during the interruption recovery period
Solution Approach 1:
The control device performs preliminary memorization of the operator's input settings before task interruption occurs. Upon resumption, the memorized settings are automatically recalled and applied, eliminating the time required for manual re-adjustment and enabling immediate task continuation with optimal parameters.
3Measurement precision
If the control system provides proportional control of hydraulic fluid flow based on additional control movement, then precise control of actuator operation is achieved, but the system requires continuous operator input to maintain desired settings
Solution Approach 1:
The control device memorizes the proportional control settings in advance, storing the relationship between additional control movement and hydraulic fluid flow rates. When memory mode is activated, the memorized proportional settings are automatically recalled and applied, maintaining precise actuator control without requiring continuous operator input or complex real-time control adjustments.
Data Source
Figure 1
Figure 2~4
AI summary
A method is described of operating a working machine (10) which includes a body (11), a ground engaging structure (13), and a working arm (14) carrying a working implement (19), and an operator control (30a) for operating hydraulic actuators (20-23, 24, 28) for effecting operating functions of the machine (10), the operator control (30a) mounting an additional control (32) which is controllable to operate at least one selected actuator for effecting a selected operating function, the additional control (32) providing inputs to a control device (31) which responds proportionally to operate the selected actuator, the method including controlling the additional control (32) to operate the selected actuator, and with the additional control (32) being controlled to provide an input to the control device (31) to achieve a desired operation of the actuator, activating a memory mode whereby the control device (31) memorises the input and continues to operate the selected actuator in accordance with the memorised input.