Measuring Instrument Layout for Accurate Tank State Estimation
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Solution Overview
Problem
Existing systems for estimating the state of liquefied gas tanks on ships do not adequately address the optimization of measuring instrument installation locations, which affects the accuracy of state estimation.
Innovation Solution
An information processing method and device that calculates an index value of the contribution degree of a measuring instrument's installation location to the accuracy of state estimation, using analysis model and plan information to optimize the installation location and number of instruments based on empirical observability Gramian eigenvalues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the installation location of measuring instruments is not optimized, then the system structure remains simple, but the accuracy of state estimation deteriorates
Solution Approach 1:
The patent applies preliminary action by calculating the contribution degree index for multiple possible installation locations before finalizing the measuring instrument deployment. The information processing device evaluates each candidate location's impact on state estimation accuracy in advance, allowing the selection of optimal locations that maximize measurement precision while maintaining manageable system complexity through pre-computed assessment criteria.
2Measurement precision
If more measuring instruments are installed to improve state estimation accuracy, then measurement precision improves, but device complexity and cost increase
Solution Approach 1:
The patent applies parameter changes by introducing and calculating a contribution degree index as a quantitative parameter to evaluate the impact of each measuring instrument location on state estimation accuracy. This parameter allows the system to objectively compare different installation configurations and determine the optimal number and location of instruments, avoiding unnecessary complexity while achieving sufficient measurement precision through data-driven evaluation.
Data Source
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AI summary
An information processing device acquires analysis model information for performing state estimation of a structure and plan information including an installation location of a measuring instrument for measuring a physical quantity related to a state of the structure, calculates an index value of contribution degree of the installation location to accuracy of the state estimation based on the acquired analysis model information and the acquired plan information, and outputs result information including the calculated index value.