Telescopic Lifting Device Control Prioritization
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Solution Overview
Problem
The control of telescopic lifting devices for articulate turntable ladders and rescue vehicles is complex due to the numerous interrelated components, and existing methods lack sophistication in prioritizing component movements to achieve desired rescue support element positions, especially under load limits and varying operational conditions.
Innovation Solution
A method that prioritizes specific movements of the telescopic arm over other components, such as articulation over extension/retraction, based on pre-set parameters like horizontal and vertical distances, elevation angles, and load conditions, allowing automatic transformation of control commands into optimized component movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic control transformation is implemented to simplify operation, then ease of operation is improved, but device complexity increases due to additional control systems and calculation requirements
Solution Approach 1:
The control system automatically transforms high-level rescue commands into low-level component movements without requiring operator intervention. The system serves itself by calculating optimal movement sequences based on pre-stored working conditions and load limits, eliminating the need for complex manual coordination while maintaining simplified operation.
Solution Approach 2:
Working conditions and load limits are pre-calculated and stored in the controller before operation. This preliminary preparation allows the control system to quickly determine optimal movement sequences during rescue operations without performing complex real-time calculations, reducing computational complexity while maintaining ease of operation.
2Adaptability or versatility
If multiple movement options are considered for achieving desired positioning, then adaptability is improved, but control complexity increases due to prioritization decisions required under load limits
Solution Approach 1:
The control system dynamically selects movement priorities based on real-time working conditions and load limits. Different prioritization strategies are applied depending on the operational context - for example, prioritizing articulation over extension when load limits are approached, or vice versa when more positioning flexibility is needed. This dynamic adaptation maintains versatility while managing control complexity through context-dependent decision rules.
Solution Approach 2:
The system changes operational parameters such as movement priorities, extension limits, and articulation angles based on pre-stored working conditions and current load states. By adjusting these parameters dynamically, the system adapts to different rescue scenarios and load constraints without requiring complex real-time optimization algorithms, maintaining adaptability while controlling complexity.
3Reliability
If component movements are prioritized based on working conditions and load limits, then reliability is improved by avoiding overload, but ease of operation decreases due to sophisticated control algorithms required
Solution Approach 1:
The control system continuously monitors working conditions and load limits, using this feedback to automatically adjust movement priorities and prevent overload conditions. The system compares current operational parameters against pre-stored limits and automatically modifies control commands to maintain safe operating margins, ensuring reliability while keeping the operator interface simple.
Solution Approach 2:
Complex mechanical coordination and manual load management are replaced by an automated control system that uses pre-stored working conditions and load limits to make intelligent decisions. The control algorithm substitutes for manual judgment and coordination, automatically prioritizing movements that avoid overload while maintaining the desired rescue positioning, thus ensuring reliability without complicating operator tasks.
Data Source
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AI summary
The invention is related to a method for controlling a telescopic lifting device (10) comprising a set (16) of telescopically extendable elements to be extended or retracted in a linear direction with respect to each other, the set (16) being pivotably mounted to a base (14) to be elevated around a horizontal pivot axis, a telescopic arm (18) attached to the free end of the set (16) which can be articulated with respect to the set (16) and telescopically extended and retracted, and a rescue support element (20) mounted to the free end of the arm (18), said method comprising the automatic transformation of a control command for moving the rescue support element (20) into movements of components of the telescopic lifting device, wherein the movement of the arm (18) includes an articulation of the arm (18) with respect to the set (16) and/or a telescopic extension or retraction of the arm (18), wherein the movement of the arm (18) is controlled according to a working condition of the telescopic lifting device, defined by a number of parameters.