Dump Truck Vessel Control System Nonlinear Speed Adjustment
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Solution Overview
Problem
In dumping operations, the discharge amount of cargo needs to be adjusted based on the capacity of the dumping site and processing conditions, leading to potential productivity decreases if the vessel's operation timing is not optimized.
Innovation Solution
A control system for a dump truck that includes a signal reception unit and a vessel control unit, which varies the extension speed of the hydraulic cylinder nonlinearly with respect to elapsed time when receiving a rising command signal, allowing for adjustable cargo discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vessel rises at a constant speed, then the operation is simple, but the discharge amount cannot be adjusted according to dumping site capacity
Solution Approach 1:
The patent applies dynamics by transitioning from constant-speed vessel rise to variable-speed rise. The control system dynamically adjusts the extension speed of the hydraulic cylinder based on elapsed time, enabling the discharge amount to be adapted to different dumping site capacities while maintaining automated control.
Solution Approach 2:
The patent changes the speed parameter of the hydraulic cylinder from constant to variable. By implementing nonlinear speed variation with respect to elapsed time, the system can control the discharge rate to match the processing capacity of the dumping site, resolving the contradiction between adaptability and operational simplicity.
2Productivity
If the operator manually stops the vessel rise halfway, then the discharge amount is suppressed, but the productivity decreases due to inappropriate operation timing
Solution Approach 1:
The control system incorporates feedback mechanisms that monitor the rising action of the vessel and automatically adjust the hydraulic cylinder speed. This eliminates the need for manual intervention and inappropriate timing, as the system autonomously optimizes the discharge process to maintain productivity.
Solution Approach 2:
The system performs self-service by automatically controlling the vessel rise speed based on pre-programmed nonlinear profiles. The control unit independently manages the discharge timing and rate without requiring operator intervention, thereby preventing productivity loss from manual operation errors.
3Manufacturing precision
If the hydraulic cylinder extends at variable speed, then the cargo discharge is controlled, but the control precision must be high
Solution Approach 1:
The control system implements periodic action by dividing the vessel rise process into discrete time intervals. The extension speed is adjusted at each interval based on the nonlinear speed profile, achieving precise cargo discharge control through automated periodic adjustments rather than continuous complex control.
Data Source
AI summary
A control system for a dump truck includes a signal reception unit that receives a rising command signal to cause the dump truck including a vessel and a hydraulic cylinder configured to raise and lower the vessel to start a rising action of the vessel, and a vessel control unit that varies an extension speed of the hydraulic cylinder nonlinearly with respect to elapsed time when the signal reception unit receives the rising command signal.