Autonomous Machine Vibration Feedback for Power Hop Control
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Solution Overview
Problem
Autonomous machines, particularly those with pneumatic-tired wheels, suffer from power hop and other unwanted oscillations and vibrations that negatively impact traction and component life, which existing methods like tire pressure regulation do not adequately address.
Innovation Solution
An autonomous machine system with accelerometers and velocity sensors, controlled by a controller, adjusts velocity and potentially tire pressure to mitigate vibrations by reducing speed when thresholds are exceeded, using a model that adapts to real-time conditions for optimal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the machine operates at high velocity to maintain productivity, then productivity is improved, but unwanted oscillations and vibrations increase
Solution Approach 1:
The system continuously monitors acceleration using accelerometers and feeds this information back to the controller. When vibrations exceed predetermined thresholds, the controller automatically adjusts velocity to reduce oscillations, creating a closed-loop feedback system that dynamically balances productivity with vibration control
Solution Approach 2:
The system dynamically adjusts machine velocity based on real-time vibration conditions rather than operating at a fixed speed. The controller modulates velocity within a range, increasing it when conditions permit for productivity and reducing it when vibrations become excessive, making the system adaptable to changing operational conditions
2Object-generated harmful factors
If tire pressure is regulated to reduce vertical machine oscillations, then machine oscillation is reduced, but the system complexity increases
Solution Approach 1:
The system replaces mechanical vibration control methods (such as passive suspension or mechanical dampers) with an electronic control system that uses accelerometers, a controller, and velocity regulation to achieve vibration reduction, thereby simplifying the overall mechanical structure while adding intelligent control capabilities
3Object-generated harmful factors
If velocity is reduced to minimize vibrations, then unwanted oscillations are reduced, but productivity decreases
Solution Approach 1:
The system applies velocity reduction only partially and selectively - not continuously, but only when and where vibrations exceed predetermined thresholds. This partial action approach maintains high productivity during acceptable vibration conditions while applying speed reduction only when necessary to control oscillations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively reduces unwanted oscillations and vibrations, prolongs component life, and optimizes operation without human input, enhancing machine performance and safety.
Implementation Method 1
one or more accelerometers that measure acceleration of the tractor unit and/or the trailer unit along three perpendicular axes
Implementation Method 2
a velocity sensor for measuring a velocity of the autonomous machine
Data Source
AI summary
Operating an autonomous machine using analysis of machine vibration while it is operational. Accelerometers are used to measure the machines vibrations while it is being operated. If the vibrations exceed a predetermined acceleration a controller adjust the velocity of the machine to prevent/reduce further vibrations.