Hybrid Drive Control Coordination via Real-Time Range Correction
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Solution Overview
Problem
Time delays in communication between control units in hybrid vehicle drive trains lead to outdated operating range information, resulting in target operating points that may be outside the currently possible or optimal ranges, affecting control quality and efficiency.
Innovation Solution
A method where the higher-level control unit receives reported operating ranges with time delays, corrects target operating points using instantaneous limits, and influences corrections based on operating states to ensure precise setting of target operating points, minimizing negative effects of time delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a higher-level control unit coordinates drive units based on reported operating ranges, then centralized control and coordination is achieved, but time delays in communication cause outdated operating range information
Solution Approach 1:
The unit control devices determine their currently possible and currently optimal operating ranges instantaneously and report them to the higher-level control unit before coordination decisions are made. This preliminary determination of operating ranges allows the higher-level control unit to work with the most current information available, reducing the effective delay in the coordination loop.
Solution Approach 2:
The system implements a feedback mechanism where unit control devices continuously report their operating ranges to the higher-level control unit, which then uses this information to determine target operating points. The higher-level control unit sends back coordination commands that are based on the current state of the drive units, creating a closed-loop control system that adapts to changing conditions.
2Extent of automation
If target operating points are determined by higher-level control unit, then centralized coordination is achieved, but target operating points may fall outside currently possible operating ranges due to delays
Solution Approach 1:
The unit control devices perform preliminary determination of their currently possible operating ranges and report these to the higher-level control unit. This preliminary action ensures that the higher-level control unit receives up-to-date information about the actual capabilities of each drive unit before target operating points are determined, increasing the reliability that targets will be feasible.
Solution Approach 2:
The system dynamically adjusts target operating points based on the currently determined optimal operating ranges reported by unit control devices. Rather than using static or delayed operating range information, the higher-level control unit adapts its target determination in real-time to match the actual capabilities of the drive units, ensuring targets remain within feasible ranges.
3Ease of operation
If unit control devices report operating ranges with time delays, then communication between control units is maintained, but control quality deteriorates due to outdated information
Solution Approach 1:
Unit control devices perform preliminary determination of their operating ranges instantaneously before communication occurs. By determining the operating range right before reporting it, the system minimizes the time gap between the actual state and the reported state, thereby maintaining higher accuracy in the communicated information despite the inherent communication delay.
Solution Approach 2:
The operating range information is dynamically updated by each unit control device based on current conditions rather than being static or periodically updated. This dynamic updating ensures that the most current operating range information is communicated to the higher-level control unit, improving the precision of the coordination decisions.
Data Source
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AI summary
The invention relates to a method for coordinating at least one drive aggregate of a vehicle, wherein said at least one aggregate is associated with at least one control device implemented as an aggregate control device (6, 8), wherein a superordinate control device (4) is provided, and wherein information is exchanged between the control devices, wherein, in order to perform the method, - at least one operating parameter of an operating region of the at least one associated drive aggregate is transmitted by the at least one aggregate control device (6, 8) to the superordinate control device (4), wherein a target operating point for the at least one drive aggregate is derived by the superordinate control device (4) on the basis of the at least one received operating parameter, and wherein the derive target operating point is transmitted together with the at least one operating parameter to the at least one aggregate control device (6, 8).