Mobile Machine Turn Speed Control System
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Solution Overview
Problem
Mobile machines in agricultural and construction industries face challenges in optimizing turn maneuvers between segments of operating paths, particularly in navigating tight angles and varying terrain, which affects efficiency and safety.
Innovation Solution
A control system utilizing sensors and computing devices to determine and adjust the optimal speed for turn maneuvers based on machine state, path geometry, and external factors, ensuring safe traversal and minimizing time and fuel consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the machine increases speed during turn maneuvers to improve productivity, then the operational time is reduced, but the risk of machine tilting or rollover increases
Solution Approach 1:
The system dynamically changes the speed parameter based on turn characteristics. The controller determines an optimal turn speed that is lower than straight-line operating speed, adjusting this parameter in real-time based on turn radius, slope, and machine state to maintain stability while minimizing time loss
Solution Approach 2:
The system implements dynamic speed adjustment during turn maneuvers. Rather than maintaining a fixed speed, the controller continuously monitors machine state and external factors, adjusting the target speed dynamically to optimize the trade-off between productivity and stability throughout the turn
2Reliability
If the machine decreases speed during turn maneuvers to improve safety, then the risk of tilting or rollover is reduced, but the operational time increases
Solution Approach 1:
The controller determines the optimal turn speed in advance before the machine enters the turn maneuver. By calculating the appropriate speed reduction based on predicted turn characteristics and machine state, the system prepares the optimal speed profile beforehand, enabling smooth transition and minimizing unnecessary time loss
Solution Approach 2:
The system uses feedback from sensors monitoring machine state (roll angle, yaw rate, linear acceleration) and external factors (turn radius, slope) to continuously adjust the target speed during the turn. This closed-loop control ensures the machine maintains the optimal balance between safety and efficiency throughout the maneuver
3Productivity
If the machine traverses turns at higher speed to minimize time loss, then productivity improves, but the risk of harmful factors (tilting, rollover) increases
Solution Approach 1:
The system applies beforehand cushioning by reducing speed before and during the turn maneuver. This preventive speed reduction cushions against the harmful effects of centrifugal force and gravitational components on sloped terrain, preventing machine tilting and rollover before they can occur
Solution Approach 2:
The controller applies preliminary anti-action by counteracting the harmful effects of high-speed turning through proactive speed reduction. By determining and enforcing a lower target speed during turns, the system prevents the development of dangerous lateral forces that could lead to tilting or rollover
Data Source
AI summary
A control system for a mobile machine includes one or more sensors for generating machine state data and one or more computing devices. The one or more computing devices are configured to determine a first segment and a second segment of an operating path of the machine and to use the machine state data to determine an optimal speed for a turn maneuver between the first segment and the second segment of the operating path. The one or more computing devices may further be configured to determine a first optimal speed for a first portion of the turn maneuver and a second optimal speed for a second portion of the turn maneuver.