Virtual End Stop Vibration Control for Operator Comfort
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Solution Overview
Problem
Existing vibration control systems for mobile machines, such as wheel tractor scrapers and dozers, fail to adequately isolate operators from subsequent oscillations following initial disruptions, leading to operator discomfort and difficulty in controlling the machine due to excess motion or 'rattling'.
Innovation Solution
A vibration control system that includes a first and second physical end stop, a damper assembly, a position sensor, and a processor to set virtual end stop positions and regulate damping, effectively minimizing subsequent motion by adjusting damping forces based on component position and velocity to return the operator to a set position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If damping is increased to prevent contact with end stop limits, then harsh contact is prevented, but operator control and comfort are not fully improved due to remaining oscillations
Solution Approach 1:
The system continuously monitors the suspension system's position and velocity, using this feedback to calculate and adjust the optimal damping coefficient in real-time. This closed-loop control ensures that damping is optimized for both harsh contact prevention and operator control, resolving the contradiction by adapting to actual system state.
Solution Approach 2:
The system calculates the optimal damping coefficient in advance based on the current state and predicted motion trajectory, allowing the damper to be pre-positioned for optimal performance before excessive motion occurs. This preliminary adjustment helps maintain operator control while preventing harsh contact.
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
The system effectively limits rattle space and maintains operator comfort and control by isolating initial excursions and minimizing subsequent vibrations, allowing for smoother transitions and reduced operator discomfort.
Implementation Method 1
a damper to control resonant motion of the seat
Implementation Method 2
a damper to control resonant motion of the seat
Implementation Method 3
The suspension systems typically include a spring to support the machine component
Data Source
AI summary
A component vibration control system is disclosed. The vibration control system includes a first physical end stop, a second physical end stop, a damper assembly, a position sensor configured to determine a component position, and a processor in communication with the position sensor and the damper assembly. The processor is configured to set a first virtual end stop position, regulate a damping force of the damper assembly as the component moves toward the first virtual end stop position, and determine a second virtual end stop position based on a first distance of the component from a set position.