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Efficiency of event-based sampling according to error energy criterion
1Department of Electronics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland. miskow@agh.edu.pl
Sensors (Basel, Switzerland)
|February 2, 2012
Summary
This study introduces an event-based sampling method using a constant sampling error energy criterion. This approach offers greater flexibility and effectiveness than periodic sampling for applications requiring bounded error energy.
Area of Science:
- Control Engineering
- Signal Processing
- Data Acquisition
Background:
- Conventional periodic sampling is a standard but can be inefficient.
- Event-based sampling offers adaptive data acquisition.
- Existing event-based criteria may not suit all applications.
Purpose of the Study:
- To analyze an event-based sampling scheme based on constant sampling error energy.
- To compare its effectiveness against periodic and other event-based sampling methods.
- To enhance flexibility in selecting sampling criteria for specific applications.
Main Methods:
- Analytical proof of sampling criterion effectiveness.
- Comparison with periodic sampling, send-on-delta, and integral criteria.
- Evaluation of sampling effectiveness versus total sampling error.
Main Results:
- The proposed energy criterion is analytically proven more effective than periodic sampling.
- It is more effective than integral criteria but less than send-on-delta.
- Increased sampling effectiveness comes at the cost of higher total sampling error.
Conclusions:
- The constant sampling error energy criterion provides a valuable addition to event-based sampling schemes.
- It offers a flexible and effective alternative for applications like building automation and climate control.
- Careful consideration of the trade-off between sampling effectiveness and total error is necessary.
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