Ground Speed Control for Track-Type Tractors
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Solution Overview
Problem
Existing systems for machines like track-type tractors fail to automatically adjust the target ground speed while maintaining the load on the implement during deceleration, leading to undesirable implement adjustments and potential slippage.
Innovation Solution
A system and method using an electronic control module with sensors and algorithms to calculate and adjust the target ground speed, incorporating a deceleration control to maintain the load on the implement by adjusting the blade position and engine speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the system raises the implement to reduce load and maintain constant speed, then the machine speed is maintained, but the implement adjustment is undesirable when deceleration control is applied
Solution Approach 1:
The system dynamically adjusts the target ground speed based on detected deceleration conditions. When deceleration control is applied, the system modifies the target speed trajectory to match the operator's intended deceleration, preventing unwanted implement adjustments while maintaining appropriate speed control.
Solution Approach 2:
The system continuously monitors machine speed, implement load, and operator control inputs to detect deceleration conditions. This feedback mechanism allows the system to distinguish between speed changes caused by load variations versus operator-initiated deceleration, enabling appropriate responses that respect operator intent.
2Speed
If the deceleration control limits engine speed to reduce machine speed, then the machine slows down, but the system may raise the implement undesirably
Solution Approach 1:
The system performs preliminary detection of deceleration conditions by monitoring engine speed limits and control inputs before implementing speed adjustments. By identifying deceleration intent early, the system can prepare appropriate responses that prevent unwanted implement adjustments while achieving the desired speed reduction.
Solution Approach 2:
The system changes the target ground speed parameter dynamically based on detected deceleration conditions. When deceleration control is active, the system adjusts the target speed parameter to reflect the operator's intended speed profile, preventing incorrect implement adjustments while maintaining reliable control.
3Stability of the object's composition
If the system maintains constant speed by adjusting the implement, then speed stability is improved, but track slippage occurs under high load
Solution Approach 1:
The system dynamically adjusts the target ground speed based on real-time detection of deceleration conditions and load variations. This dynamic approach allows the system to maintain speed stability when appropriate while preventing track slippage by adjusting speed targets in response to changing operational conditions.
Data Source
AI summary
A method for automatically adjusting a target ground speed of a machine includes receiving data from a sensor, at a work monitor unit of an electronic control module of the machine, analyzing the data received from the sensor on the work monitor unit, receiving the data from the work monitor unit at a target model unit of the electronic control module, calculating, at the target model unit based on the data, ground engagement data for the machine, receiving the ground engagement data for the machine at a work monitor library unit of the electronic control module, calculating, at the work monitor library unit, the target ground speed, and adjusting a speed of the machine to the target ground speed.