Grading Machine Control System Actuator Coordination
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Solution Overview
Problem
Grading machines, such as motor graders, rely heavily on operator expertise for precise movement of ground-engaging devices, which can be challenging due to the complex linkage kinematics, leading to inefficiencies in achieving target grading device movements.
Innovation Solution
A control system that uses either a first or second control pattern to coordinate the extension or retraction of actuators, such as lift linkages, side shift actuators, and drive arrangements in a timed relationship to achieve target grading device movements, allowing for precise control of grading device movements without relying solely on operator input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If individual input commands from the operator are used to control actuators for moving the grading device, then the operator has direct control over each actuator, but the precision and efficiency of achieving target grading device movements deteriorate due to complex linkage kinematics and heavy reliance on operator expertise
Solution Approach 1:
The control system acts as an intermediary between the operator and the actuators. Instead of the operator directly controlling each actuator, the control system receives the operator's input command and automatically computes the coordinated movement of multiple actuators based on the desired grading device movement, thereby resolving the complexity of linkage kinematics while maintaining operator intent
Solution Approach 2:
The control system enables the grading machine to control its own actuators automatically. The system uses computational algorithms to determine the required actuator movements to achieve the target grading device position, making the system self-regulating and reducing dependency on operator expertise in managing complex kinematics
2Manufacturing precision
If the control system automatically adjusts actuators to achieve target grading device movement, then grading precision and efficiency improve, but the complexity of the control system increases
Solution Approach 1:
The patent replaces complex mechanical control linkages with a computational control system. Instead of using purely mechanical means to coordinate actuator movements, the system uses electronic sensors, processors, and algorithms to compute and execute the coordinated actuator movements, simplifying the physical mechanical complexity while achieving precise control
Solution Approach 2:
The control system dynamically changes operational parameters (actuator positions, speeds, and sequences) based on real-time feedback and computational algorithms. This allows the system to adapt to varying conditions and achieve precise grading device movement without requiring fixed complex mechanical linkages
Data Source
AI summary
A grading machine and method for grading a ground surface including a machine body, a drawbar frame coupled to the machine body, a movable grading device coupled to the drawbar frame, a drive arrangement coupled to the drawbar frame and a circle member, a pitch frame coupled to the circle member, a movable grading device coupled to the pitch frame, a right lift linkage arrangement, a left lift linkage arrangement, a circle member side shift linkage arrangement, a grading device side shift linkage, a pitch actuator, a user interface, and a control system. The control system is configured to receive an input command from the user interface for a target grading device movement and adjust one or more of the right lift actuator, the left lift actuator, the side shift actuator, and the drive arrangement to achieve the target grading device movement using a first control pattern or a second control pattern.