However since VWV system is multivariable, strongly coupled, nonlinear and time variant, its design performance and management are more difficult than constant flow chilled water volume system's.
但是变水量空调系统具有多变量、强耦合、非线性、时变的特点，其运行和管理相对于定水量系统难度大些。
Tension of warp system is time-variant and nonlinear system. According to characteristic of tension of warp system, Fuzzy-PID algorithm is adopted.
纬纱张力系统是一个非线性、时变的系统，针对这一特点，采用模糊pid算法进行伺服控制。
Aimed at the problem of iterative learning control for nonlinear discrete time-variant system, the improved iterative learning control algorithm is given.
针对非线性离散时变系统的迭代学习控制问题，提出了一种改进的迭代学习控制算法。
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