Research and verification on variable temperature tracking control experimental methodology of high temperature structure in intense transient thermal environment
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摘要:
针对先进航空发动机高温结构强瞬变热环境试验模拟需求,开发了快速变温跟踪控制试验方法并搭建了试验系统,对比两种面向不同温度变化率的控制方法,分别形成基于可编程控制器Arduino的单回路双作动proportion integration differentiation(PID)控制方法及基于智能仪表Eurotherm的双回路多段PID控制方法。通过仿真工具Simulink进行参数整定验证,利用该试验系统开展了不同速率目标与试样类型的快速变温跟踪控制试验。结果表明:航空发动机涡轮盘材料GH4169在300~650 ℃范围内三角波及梯形波目标下两种控制器控制误差均低于6.83%,控制效果平滑精准,空心薄壁管可控温度变化率达到100 ℃/s,基于Eurotherm的控制方法精度与适用性更具优势。
Abstract:To simulate the intense transient thermal environment of advanced aero-engine in laboratory, an experimental system was constructed to achieve rapid temperature tracking control. Two control methodologies tailored to different temperature variation rates, i.e. single-loop double-acting proportion integration differentiation (PID) control method based on Arduino and double-loop multi-segment PID control method based on Eurotherm, were experimentally investigated and compared. Parameters tuning was validated using Simulink simulations, and the experimental system was utilized to conduct rapid temperature tracking tests. Within the temperature range of 300 ℃ to 650 ℃, both controllers achieved control errors below 6.83% when tracking triangular and trapezoidal wave targets. The Eurotherm-based controller exhibited clear advantages, achieving a maximum temperature change rate of 100 ℃/s.
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表 1 基于Arduino控制方法的温度控制试验误差
Table 1. Temperature experimental error based on Arduino control methodology
试样 变温速率/
(℃/s)目标
波形控制
过程控制
误差/%空心
薄壁管15 三角波 循环升温段 2.608 9 15 三角波 循环降温段 6.274 8 15 三角波 循环全程 4.441 8 15 线性 仅降温 4.547 1 表 2 基于Eurotherm控制方法的温度控制试验误差
Table 2. Temperature experimental error based on Eurotherm control methodology
试样 变温速率/
(℃/s)目标
波形控制
过程控制
误差/%空心
薄壁管15 三角波 循环升温段 1.970 3 15 三角波 循环降温段 2.856 5 15 三角波 循环全程 2.413 4 15 梯形波 循环升温段 1.812 6 15 梯形波 循环恒温段 0.379 8 15 梯形波 循环降温段 2.041 1 15 梯形波 循环全程 1.411 1 50 三角波 循环升温段 2.641 6 50 三角波 循环降温段 3.104 4 50 三角波 循环全程 2.798 0 100 三角波 循环升温段 5.876 3 100 三角波 循环降温段 6.825 9 100 三角波 循环全程 6.351 1
平板20 三角波 循环升温段 3.949 2 20 三角波 循环降温段 3.757 2 20 三角波 循环全程 3.843 5 -
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