Tilting Bucket Control for Excavation Efficiency
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Solution Overview
Problem
Construction machines with tilting type buckets experience deteriorated working efficiency due to lack of specific control mechanisms for the tilting type bucket in existing working device control systems.
Innovation Solution
A construction machine control system that includes a target construction ground shape generation unit, tilting data calculation unit, regulation point position data calculation unit, tilting target ground shape calculation unit, and working device control unit to control the tilting of the bucket based on the distance between a regulation point and the tilting target ground shape, optimizing the tilting operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a tilting type bucket is used to improve working efficiency, then excavation capability is enhanced, but working efficiency deteriorates due to lack of specific control mechanisms
Solution Approach 1:
The system changes the control parameters from conventional boom-arm-bucket control to include bucket tilting angle as an additional controlled parameter. The control device calculates target tilting angles based on the target ground shape and current bucket position, enabling independent control of bucket orientation without affecting the primary working device parameters.
Solution Approach 2:
The control device integrates multiple functions into a single system: it manages the conventional working device control while simultaneously controlling the bucket tilting mechanism. This multi-functional control allows the system to handle both standard excavation operations and optimized tilting operations through a unified control interface.
2Ease of operation
If conventional working device control is used, then control simplicity is maintained, but working efficiency deteriorates due to inability to control tilting type bucket
Solution Approach 1:
The system merges the conventional working device control with the new bucket tilting control into a single integrated control device. This consolidation allows operators to control all functions through one interface without managing separate control systems, maintaining operational simplicity while adding tilting capability.
Solution Approach 2:
The control device automatically calculates target tilting angles and generates control signals without requiring manual input from the operator. The system self-adjusts the bucket tilting based on the target ground shape and current position, eliminating the need for complex manual coordination while improving working efficiency.
3Productivity
If bucket tilting control is added to existing system, then working efficiency improves, but device complexity increases
Solution Approach 1:
The control device acts as an intermediary between the operator's commands and the multiple actuators (boom, arm, bucket, and tilting mechanism). It receives high-level control inputs and automatically generates the coordinated control signals needed for all components, shielding the operator from the underlying system complexity while enabling efficient tilting operations.
4Measurement precision
If multiple control units are used for different working device functions, then control precision is improved, but system complexity increases
Solution Approach 1:
The system merges multiple control functions into a single control device that handles both conventional working device control and bucket tilting control. This unified approach maintains control precision through integrated calculation and coordination while reducing system complexity by eliminating the need for separate control units and their associated communication interfaces.
Data Source
AI summary
A construction machine control system includes: a target construction ground shape generation unit generating a target construction ground shape indicating a target shape of an excavation target; a tilting data calculation unit calculating tilting data of a bucket tilted about a tilting axis; a regulation point position data calculation unit calculating position data of a regulation point set in the bucket based on external shape data of the bucket including at least width data of the bucket; a tilting target ground shape calculation unit calculating a tilting target ground shape extending in a lateral direction of the bucket in the target construction ground shape based on the position data of the regulation point, the target construction ground shape, and the tilting data; and a working device control unit controlling a tilting of the bucket based on a distance between the regulation point and the tilting target ground shape.