Actuator Condition Tracking for Predictive Maintenance Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing building automation systems rely on calendar-based maintenance programs, which often lead to premature replacement of some actuators and unexpected failures in others, due to factors not considered by these programs, resulting in sub-optimal system performance and energy wastage.
Innovation Solution
An actuator that tracks local parameters over time, such as temperature, load current, and operational cycles, to determine an expected failure date, allowing for more precise and timely replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If calendar based maintenance program is used to replace actuators, then actuators will be replaced before failure statistically, but some actuators will be replaced prematurely while others may fail before the indicated replacement date
Solution Approach 1:
The patent transitions from calendar-based time parameters to actual operational parameters (cycle count, temperature exposure, load current integration) to predict actuator failure. This changes the basis of maintenance scheduling from fixed time intervals to parameter-based condition monitoring, allowing more accurate prediction of actual actuator life based on real usage patterns.
Solution Approach 2:
The actuator incorporates sensors and electronics that continuously monitor operational parameters and provide feedback about the actuator's actual condition. This feedback loop enables the actuator to track its own health status and predict failure based on real-time data rather than predetermined calendar schedules, resolving the contradiction between early replacement and unexpected failure.
2Reliability
If actuators are replaced based on worst case scenario calendar dates, then system availability is maintained, but energy is wasted on premature replacement and sub-optimal performance occurs when actuators fail early
Solution Approach 1:
The actuator performs preliminary self-diagnosis and failure prediction by continuously monitoring its own operational parameters and comparing them against failure models. This preliminary action allows maintenance to be scheduled just before actual failure is predicted, eliminating both premature replacement and unexpected failures, thereby optimizing energy efficiency while maintaining system availability.
Solution Approach 2:
The actuator monitors its own condition and predicts its own failure without requiring external monitoring systems. This self-service capability enables precise timing of maintenance actions based on actual actuator health, preventing energy wastage from premature replacement while ensuring replacement occurs before failure affects system performance.
3Duration of action of moving object
If actuators operate until failure, then component usage is maximized, but building control system performance deteriorates and energy is wasted when failure occurs
Solution Approach 1:
The actuator uses embedded sensors and electronics to continuously monitor operational parameters and provide feedback about its health status. This feedback enables prediction of remaining service life based on actual usage patterns rather than operating until complete failure, allowing timely replacement that maximizes service life while preventing the energy wastage associated with failed operation.
Solution Approach 2:
The system transitions from operating until complete failure to replacing based on predicted failure parameters derived from monitored operational data. This parameter-based approach maximizes the useful service life of actuators by keeping them operational as long as they remain healthy, while scheduling replacement just before predicted failure to avoid the energy wastage of failed operation.
Data Source
AI summary
An actuator may include a drive motor, an actuatable output, and a sensor for sensing a first sensed parameter in or around the actuator. The first sensed parameter may have a first sensed parameter value that can change with time. The actuator may also include electronics that may identify a first identified value representative of the first sensed parameter value and increment a first counter value when the first identified value falls within a first range of values, and increment a second counter value when the first identified value falls within a second range of values.