Excavator Control System Mode Mapping for Operator Fatigue
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Solution Overview
Problem
Excavators and similar power machines face challenges in efficiently controlling various functions, such as lift arm and travel operations, due to the complexity of existing control systems which often require manual shifting between different modes, leading to operator fatigue and reduced productivity.
Innovation Solution
A control system with a pair of two-axis operator inputs and a mode select input that allows for mapping of control functions to different modes, enabling seamless transition between functions like lift arm, bucket, and travel operations, enhancing operator convenience and machine efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual shifting between control modes is required, then control functions can be switched, but operator fatigue increases and productivity decreases
Solution Approach 1:
The control system dynamically reconfigures the mapping between operator inputs and machine functions based on the selected mode. The controller automatically adjusts control parameter assignments when modes are switched, eliminating manual intervention and maintaining optimal control configuration for each operational state.
Solution Approach 2:
The system performs self-configuration through automatic mode recognition and self-adjusting control parameter mapping. When a mode change is detected, the controller autonomously reassigns control parameters without requiring operator intervention, making the control system self-sufficient and reducing operational burden.
2Adaptability or versatility
If multiple control modes are implemented, then operational versatility improves, but control system complexity increases
Solution Approach 1:
A single control system architecture handles multiple operational modes by implementing a universal control parameter mapping mechanism. The controller uses a common set of operator inputs that can be dynamically reassigned to different machine functions depending on the selected mode, eliminating the need for separate control systems for each operation type.
Solution Approach 2:
The system manages operational versatility through parameter reconfiguration rather than structural complexity. Different control modes are achieved by changing control parameter assignments and mappings within the same hardware architecture, allowing the system to adapt to various operational requirements through software-based parameter adjustment rather than physical system complexity.
Data Source
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AI summary
Power machines (100; 200; 400) such as excavators with control inputs (466; 468) that are configurable to control various functions on the excavator. In some modes, selected control inputs are manipulable to control the position of a lift arm (230), bucket, and house (211) position. In other modes, the same control inputs are used to control travel and an implement (334) on an undercarriage (212).