Temperature Trajectory Tracking With Discrete PID Control
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Solution Overview
Problem
Current temperature control technologies are limited by their static control mode, which fails to accurately and rapidly track dynamic temperature trajectories required in advanced applications such as chemical reactions, precise machine part processing, and food processing.
Innovation Solution
A control method that involves discretization processing of a target temperature trajectory, followed by non-overshoot temperature control using a PID control program, allowing for precise and rapid tracking of temperature changes within a second-level response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static control mode is used to maintain constant temperature, then control accuracy is high, but the system cannot track dynamic temperature trajectories
Solution Approach 1:
The patent transforms the static control mode into a dynamic control mode by introducing discrete time steps and iterative optimization. The control system continuously adjusts the heating power based on the temperature difference between the current temperature and the target trajectory temperature at each time step, enabling the system to track dynamic temperature trajectories while maintaining high control accuracy through real-time feedback and adjustment.
2Speed
If rapid temperature changes are implemented to track trajectories, then response speed improves, but temperature overshoot occurs
Solution Approach 1:
The patent applies preliminary action by performing discretization processing on the target temperature trajectory in advance, dividing it into multiple time steps with predetermined temperature values. This pre-processing allows the control system to anticipate future temperature requirements and adjust heating power proactively, reducing the likelihood of overshoot while maintaining rapid response capability.
Solution Approach 2:
The patent implements feedback control by continuously monitoring the actual temperature and comparing it with the target trajectory temperature at each discrete time step. Based on the temperature difference, the system dynamically adjusts the heating power, creating a closed-loop control mechanism that prevents overshoot while maintaining fast response to trajectory changes.
3Manufacturing precision
If continuous temperature monitoring and adjustment is performed, then trajectory tracking precision improves, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the continuous temperature trajectory into discrete time steps, with each step having a predetermined temperature value. This segmentation simplifies the control logic by transforming a continuous control problem into a series of discrete control decisions, reducing computational complexity while maintaining trajectory tracking precision through sufficient time step resolution.
Data Source
AI summary
A control method and a control system for temperature trajectory tracking are provided. The method includes: drawing a target temperature trajectory, discretizing the target temperature trajectory, and performing temperature trajectory control based on the discretized target temperature trajectory. The system includes a preset temperature trajectory processor for drawing a target temperature trajectory, a controlled object for characterizing an actual temperature, a platinum resistance sensor for detecting the actual temperature of the controlled object and inputting the actual temperature into a controller, and the controller for drawing an actual temperature trajectory, discretizing the target temperature trajectory, and operating a PID control program to complete temperature trajectory control. The traditional static constant temperature control can be realized, and close tracking of a preset temperature process trajectory in a second-level time level can be realized, thereby meeting requirements of application occasions with strict requirements on temperature change processes in a short time.