中国科技核心期刊

中文核心期刊

CSCD来源期刊

空间控制技术与应用 ›› 2015, Vol. 41 ›› Issue (2): 41-45.

• 技术交流 • 上一篇    下一篇

一种一阶延迟惯性环节温控系统优化设计方法

  

  • 出版日期:2015-04-21 发布日期:2015-04-27

An Optimization Design Method for Temperature Control System with a FirstOrder Delay Inertial Link

  • Online:2015-04-21 Published:2015-04-27

摘要: 为提高惯性仪表的温控精度,针对纯延迟环节对温控系统稳定性的影响,提出一种一阶延迟惯性环节温控系统的优化设计方法.该方法充分利用平衡电桥消除温度跟踪误差,设计脉冲宽度调制(PWM)控制方法提高加热效率,同时基于ZieglerNichols整定法进行PID控制器优化设计以提高温控系统的相角裕度,使得温控系统对仪表间参数差异的适应能力大大增强.试验表明,在实验室条件下和具有强制对流环境的温度循环试验条件下仪表温控精度为0.006 ℃(1σ).该方法简单有效,阻容参数易于选取,能够满足温度控制的高精度要求.

关键词: 延迟惯性环节, 温度控制, PID整定, 优化设计

Abstract: In order to improve the precision of temperature control for inertia instruments, and aiming at the influence of temperature control system on the stability generated by pure delay element, an optimization design method of temperature control system with a FirstOrder Delay Inertial Element is put forward. This method takes advantage of the balance of the bridge to eliminate temperature tracking error and uses the pulse width modulation (PWM) to increase heating efficiency. At the same time, based on ZieglerNichols setting, it uses the optimization design of PID controller to improve the phase margin of the temperature control system. These approaches enhance the adaptation ability of the temperature control system to the parameters of different instruments. The experimental results show that the temperature control precision is 0.006 ℃(1σ)under laboratory conditions and under the laboratory conditions of temperature cycle with forced convection. This method is simple, effective and easy to select the parameters of resistancecapacitance, at the same time it can meet the high precision requirement for temperature control.

Key words: delay inertia element, temperature control, PID setting, optimization design