Payload Calculation System Rotational Force Compensation
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Solution Overview
Problem
Existing payload calculation systems for machines like excavators and wheel loaders do not adequately account for centrifugal and inertial forces when calculating payload mass, leading to errors in weight measurement.
Innovation Solution
A payload calculation system that includes state sensors and a processing device to measure and compensate for centrifugal, inertial, and frictional forces caused by the work implement rotating about a vertical pivot, using a dynamic model and sensor data to accurately calculate payload mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the payload calculation system uses a dynamic model to calculate payload mass during motion, then productivity is improved, but measurement precision deteriorates due to unaccounted rotational forces
Solution Approach 1:
The patent modifies the dynamic model by adding rotational parameters (angular velocity, angular acceleration) and their corresponding forces (centrifugal, inertial, frictional) to the payload calculation. This transforms the model from a standard dynamic model to one that accounts for rotational motion effects, thereby improving measurement precision while maintaining the ability to calculate during motion.
2Ease of operation
If the work implement rotates about a vertical pivot during operation, then ease of operation is improved, but measurement precision deteriorates due to centrifugal and inertial forces
Solution Approach 1:
The patent converts the harmful effect of rotational forces (centrifugal, inertial, frictional) into a beneficial solution by explicitly calculating and compensating for these forces in the payload model. The rotational motion that causes measurement errors is now accounted for through additional terms in the dynamic model, transforming the problem into an opportunity for improved accuracy.
3Device complexity
If the payload calculation system neglects rotational forces to simplify the model, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent enhances the calculation model by incorporating rotational parameters (angular velocity ω, angular acceleration α) and their associated forces. This parameter expansion transforms a simple dynamic model into a comprehensive model that maintains computational feasibility while significantly improving measurement precision through force compensation.
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 provides more accurate payload measurements, allowing machines to load transport vehicles closer to their maximum capacity, reducing maintenance costs and avoiding delays by ensuring precise weight calculations.
Implementation Method 1
The processing device may be configured to use the measured state to compensate the calculation of the mass for centrifugal, inertial, and frictional forces of the work implement caused by the work implement rotating about a vertical pivot.
Implementation Method 2
The processing device may be configured to use the measured state to compensate the calculation of the mass for centrifugal, inertial, and frictional forces of the work implement caused by the work implement rotating about a vertical pivot.
Implementation Method 3
The processing device may be configured to use the measured state to compensate the calculation of the mass for centrifugal, inertial, and frictional forces of the work implement caused by the work implement rotating about a vertical pivot.
Data Source
AI summary
The present disclosure is directed to a payload calculation system for use with a work implement. The payload calculation system may have a state sensor configured to measure a state of the work implement. The payload calculation system may further have a processing device configured to calculate a mass of a payload moved by the work implement. The processing device may be configured to use the measured state to compensate the calculation of the mass for centrifugal, inertial, and frictional forces of the work implement caused by the work implement rotating about a vertical pivot.