Equipment Operating Envelope Control for Longer Time Between Failures

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Solution Overview

Problem

Equipment failures occur frequently despite regular maintenance due to suboptimal operating conditions, leading to costly repairs and production losses.

Innovation Solution

A computer system analyzes historical sensor and failure data using machine learning to determine a prescribed operating envelope, which includes optimal operating parameter values that reduce the frequency of equipment failures by controlling the equipment within specific operational parameters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If equipment operates outside optimal conditions, then productivity may increase, but failure frequency increases and costs rise

Engineering Contradiction:
Improveequipment outputVSAvoidequipment failure rate
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The operating envelope is not static but dynamically determined based on historical sensor data and failure patterns. The system adapts the optimal parameter ranges to changing operating conditions and equipment states, allowing productivity optimization while maintaining reliability boundaries that prevent failures.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system proactively determines the operating envelope before failures occur by analyzing historical data patterns. This preliminary establishment of optimal boundaries allows the system to prevent failures before they happen by keeping operations within proven safe parameter ranges, rather than reacting after failures occur.

Inventive Principle:
Principle #10Preliminary action

2Measurement precision

If multiple sensor parameters are monitored, then operating conditions are better understood, but system complexity increases

Engineering Contradiction:
Improveoperating condition monitoringVSAvoidsystem complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system segments the complex multi-parameter monitoring task into manageable components: individual sensor data collection, separate determination of optimal range for each sensor, and then integration into a comprehensive operating envelope. This segmentation makes the complex system easier to implement and maintain while achieving precise multi-parameter monitoring.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS11907856B2Determining an operating envelope for controlling equipment
Publication Date: 2024.02.20 HITACHI LTD
  • US11907856B2 patent drawing
  • US11907856B2 patent drawing
  • US11907856B2 patent drawing

AI summary

In some examples, a computer system may receive sensor data and failure data for equipment. The system may determine, for the equipment, a plurality of time between failure (TBF) durations that are longer than other TBF durations for the equipment. The system may determine, from the sensor data corresponding to operation of the equipment during the plurality of TBF durations, a plurality of measured sensor values for the equipment. Additionally, the system may determine a subset of the measured sensor values corresponding to a largest number of the TBF durations of the plurality of TBF durations. The system may further determine at least one operating parameter value for the equipment based on the subset of the measured sensor values. The system may send a control signal for operating the equipment based on the operating parameter value and/or a communication based on the operating parameter value.