Quantication of FPGA Requirements for Closed-Loop Combustion Control Implementation
Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding
Closed-loop combustion control obtains feedback from fast in cylinder pressure measurements for accurate and reliable information about the combustion progress synchronized with the flywheel encoder. The requirements on the signal processing (evaluation rate and digital resolution) are investigated for an effective in-cycle control of the combustion. Tools for the analysis of the selection and design of the signal scaling are summarized. The implementation of the in-cylinder pressure signal processing for the computation of the heat release is studied and different alternatives analyzed. By the optimization of the arithmetic and model formulation, the necessary FPGA resources can be reduced by 80%.
In-cycle closed-loop combustion controllers were previously investigated by the authors. In this paper, the resources for the implementation of the different modules and control strategies are studied to identify the hardware requirements. The modules for the heat release calculation, combustion observers, predictive models and in-cycle controller are investigated. The results show that the total number of slices required for the computations are the main limiting factor on the consumed FPGA resources, where a total of 18729 slices out of the 17280 available would be necessary. Suggestions on how to improve these limitations are discussed based on the results.
The quantification of the required hardware provides guidance on how to select an FPGA to implement the different in-cycle combustion control alternatives. This permits to evaluate the total cost of the system as a trade-off between the increased efficiency by the closed-loop combustion control and the cost for its implementation.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Title of host publication||ICE2021, International Conference on Engines and Vehicles|
|Number of pages||12|
|Publication status||Submitted - 2021|
|Event||ICE 2021 15th International Conference on Engines & Vehicles - Capri, Naples, Italy|
Duration: 2021 Sep 12 → 2021 Sep 16
|Conference||ICE 2021 15th International Conference on Engines & Vehicles|
|Period||2021/09/12 → 2021/09/16|
Related research output
Research output: Thesis › Doctoral Thesis (compilation)