Forest Machine Wood-Handling Device Orientation Control
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Solution Overview
Problem
Current methods for controlling the operation of wood-handling devices in forest machines require complex computations and continuous reorientation based on boom end direction and speed, leading to increased fuel consumption and operator workload.
Innovation Solution
A method that ties the orientation of the wood-handling device to the position of the boom end, using position determining sensors and a control system to automate or semi-automate the rotation, allowing for pre-programmed orientations at specific boom positions, reducing the need for continuous reorientation and complex computations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the orientation of the wood-handling device is continuously adjusted based on boom end direction and speed, then the wood-handling device maintains correct orientation, but the fuel consumption increases and the control system becomes more complex
Solution Approach 1:
The patent applies periodic action by adjusting the wood-handling device orientation only at specific moments when the boom reaches predefined positions during its movement cycle, rather than continuously adjusting it. This is achieved through the control system that receives position information from sensors and triggers orientation adjustments only when the boom end reaches target positions, thereby reducing unnecessary energy consumption while maintaining operational accuracy.
Solution Approach 2:
The patent implements preliminary action by pre-defining the relationship between boom positions and corresponding wood-handling device orientations. The control system stores predefined orientation settings for various boom positions, allowing the device to be quickly oriented to the correct attitude when the boom reaches those positions, eliminating the need for complex real-time calculations and reducing energy consumption.
2Device complexity
If the orientation is tied to boom end position with pre-programmed settings, then the control implementation is simplified, but the adaptability to varying operational conditions is reduced
Solution Approach 1:
The patent applies dynamics by making the control system adaptable to different operational conditions. While the basic orientation settings are predefined for common positions, the system allows for modification of these settings based on specific operational requirements. The control system can be reprogrammed or adjusted to accommodate varying work conditions, maintaining simplicity while providing necessary flexibility through configurable parameters rather than rigid fixed settings.
3Measurement precision
If continuous reorientation is performed based on real-time boom movement, then the wood-handling device maintains optimal orientation, but the operator workload increases
Solution Approach 1:
The patent implements self-service by enabling the wood-handling device to automatically orient itself based on predefined position-oracle settings. The control system autonomously determines when orientation adjustment is needed and executes the adjustment without requiring continuous operator intervention. This reduces operator workload while maintaining orientation precision through automated control based on sensor feedback and predefined parameters.
Data Source
AI summary
A method for controlling operation of a wood-handling device in a work machine. The wood-handling device is attached through a rotation device to an end of a set of booms of the work machine to create a desired orientation of the wood-handling device for the operation. The orientation of the wood-handling device using the rotation device is tied on the basis of the operation to be performed using the set of booms. The orientation of the wood-handling device is tied to the position of the end of the set of booms. The position of the end of the set of booms is defined while performing the operation, on the basis of the position of the end of the set of booms. The wood-handling device is oriented using the rotation device, according to the said tie.