Hybrid Powertrain Torque Prediction via Derivative Processing
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Solution Overview
Problem
Signal inputs into control systems for electro-mechanical transmissions often contain noise and are time delayed, which can impair the accuracy of predicting control system inputs, thereby affecting powertrain performance.
Innovation Solution
A method for controlling the powertrain that involves determining an operator torque request, its time-based derivative, and predicting changes in the torque request based on these parameters to improve prediction accuracy and enhance powertrain performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal inputs are used directly for control, then the control system responds quickly, but the prediction accuracy deteriorates due to noise and time delays
Solution Approach 1:
The system performs preliminary processing of the operator torque request signal by calculating its time-based derivative before using it for control predictions. This advance processing removes noise and time delays from the signal, allowing the control system to work with cleaned data that improves prediction accuracy without sacrificing response time
Solution Approach 2:
The patent introduces an intermediary processing step that computes the derivative of the torque request signal. This intermediary calculation acts as a mediator between the raw noisy input signal and the control system, filtering out noise and time delay effects while preserving the essential dynamic information needed for accurate predictions
2Productivity
If noise is present in signal inputs, then the control system can operate continuously, but the prediction accuracy deteriorates
Solution Approach 1:
The system extracts the essential dynamic information from the noisy torque request signal by calculating its time-based derivative. This extraction process separates the useful signal components from the noise, allowing continuous operation while maintaining high prediction accuracy through the cleaned derivative signal
Data Source
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AI summary
A method for controlling a powertrain includes determining an operator torque request, determining a time-based derivative of the operator torque request, determining a first future time, and predicting a change in the operator torque request based upon the operator torque request, the time-based derivative of the operator torque request, and the first future time.