Predictive Control Input Compensation for Transmission Delays
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Solution Overview
Problem
In open-loop and closed-loop control systems, temporal delays in transmitting input parameters from field devices to central processing units result in outdated values, leading to suboptimal control quality, particularly in large-scale process control systems, and existing solutions like clock synchronicity are costly and difficult to implement.
Innovation Solution
Predicting future values of input parameters based on current and historical data using algorithmic methods such as extrapolation, pattern recognition, and artificial intelligence to compensate for transmission delays, ensuring the central processing unit receives current values for control decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If input parameters are transmitted from field devices to central processing units in real-time, then control quality improves, but transmission delays and outdated values occur
Solution Approach 1:
The patent applies preliminary action by predicting future values of input parameters before they are actually needed for control decisions. The prediction unit generates anticipated parameter values in advance, compensating for transmission delays. This allows the control system to use predicted current values instead of outdated transmitted values, thereby maintaining high control quality without being constrained by transmission time delays.
2Reliability
If prediction algorithms are implemented to compensate for delays, then control quality improves, but processing complexity increases
Solution Approach 1:
The patent segments the control system into distinct functional units: a prediction unit that handles the complex prediction algorithms, and a control unit that receives and processes the predicted values. This segmentation isolates the computational complexity to a dedicated prediction module, allowing the main control logic to remain simple and efficient while still benefiting from advanced prediction capabilities.
Solution Approach 2:
The prediction unit acts as an intermediary between the field devices and the control unit. It processes the raw input parameters and generates predicted future values, serving as a buffer that compensates for transmission delays. This intermediary layer shields the control unit from dealing with outdated values while maintaining system simplicity in the control logic.
3Measurement precision
If more sophisticated prediction methods are used, then accuracy of predicted values improves, but computational load on processing units increases
Solution Approach 1:
The patent implements partial action by using prediction methods that provide sufficient accuracy for control purposes without over-engineering the solution. The prediction unit applies algorithms that generate adequately accurate predicted values for the specific control application, avoiding unnecessarily complex computations. This balances prediction accuracy with computational efficiency, ensuring that the computational load remains manageable while still achieving the required control precision.
Data Source
AI summary
System and method for influencing an open-loop or closed-loop control parameter of a technical device by at least one initial parameter that is generated in accordance with at least one input parameter, wherein a predicted future value of a parameter detected in the technical device is used as an input parameter to compensate at least in part for temporal delays between the detection of the parameter and the generation of the initial parameter from the input parameter, where delays in the transmission and processing of values of input parameters can thus be compensated for and dead times in the open-loop or closed-loop control of the technical device that are caused thereby can be prevented.