Telehandler Lift Arm Velocity Control via Steering Angle
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Solution Overview
Problem
Current articulated telehandlers face limitations in productivity and operator frustration due to restrictive descent velocity limitations and conservative load diagrams, which hinder rapid and efficient operation, especially in agricultural sectors where frequent movement and varied tasks are common.
Innovation Solution
An articulated self-propelled telehandler with advanced detection and electronic processing systems that adapt the movement of the lift arm based on the steering angle and load parameters, allowing variable descent and extension velocities to enhance stability and productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the descent velocity of the lift arm is limited to prevent lateral instability, then safety is improved, but productivity and working speed deteriorate
Solution Approach 1:
The patent applies dynamics by making the descent velocity limitation conditional rather than fixed. The system dynamically adjusts whether velocity limitation is applied based on real-time detection of steering angle and load parameters. When the vehicle is on-axis and lightly loaded, full descent speed is permitted; when lateral instability risk is detected, velocity limitation is activated. This dynamic adaptation resolves the contradiction between safety and productivity.
Solution Approach 2:
The patent changes the parameter of descent velocity from a fixed limited value to a variable parameter that adapts to operating conditions. By detecting steering angle and load parameters, the system adjusts the descent velocity parameter in real-time, allowing high speed when safe and low speed when necessary, thus resolving the contradiction between safety requirements and productivity needs.
2Reliability
If a conservative load diagram is always applied to prevent instability, then safety is improved, but ease of operation and productivity deteriorate
Solution Approach 1:
The patent transforms the static conservative load diagram into a dynamic one that adapts to current vehicle orientation and load conditions. The system detects the steering angle and load parameters, then selectively applies conservative limitations only when instability risk is present. This dynamic approach maintains safety while significantly improving ease of operation during normal on-axis work.
Solution Approach 2:
The patent changes the load diagram from a fixed conservative parameter set to variable parameters that adjust based on detected conditions. By monitoring steering angle and load, the system modifies load diagram parameters in real-time, permitting more aggressive and easier operation when safe, while maintaining conservative limits when necessary.
3Stability of the object's composition
If restrictive velocity and load limitations are applied, then lateral stability is improved, but working speed and productivity deteriorate
Solution Approach 1:
The patent applies dynamics by making velocity and load limitations conditional based on real-time stability assessment. The system continuously detects steering angle and load parameters to assess lateral stability risk, then dynamically adjusts velocity and load limitations accordingly. This resolves the contradiction by maintaining high working speed when stable and applying restrictions only when instability is detected.
Solution Approach 2:
The patent implements feedback by using detection means to monitor steering angle and load parameters, then using this information to adjust velocity and load limitations. This closed-loop feedback system ensures that stability restrictions are applied only when necessary, maintaining productivity during stable operation while ensuring safety when instability risk is present.
Data Source
AI summary
The articulated self-propelled work machine (1), such as, for example, an articulated telescopic handler or the like, comprises: a front frame (11), provided with a pair of front wheels (111); a lift arm (2), adapted to support a load, hinged to the front frame (11) and mobile with respect thereto by means of at least one actuator (21, 22); a rear frame (12), provided with a pair of rear wheels (121) and articulated to the front frame (11); detecting means (51, 53, 54) for detecting an angular parameter relative to a steering angle between the front frame (11) and the rear frame (12); and electronic processing means (6) configured to control the operation of the actuator (21, 22) on the basis of the angular parameter.