过程动态特性的数学描述及其经典测试法-控制科学与工程学系.ppt

* * * * * * * * * * * * * * * * * * * * * * * * Types of Control Systems（控制系统分类） Regulatory Control（“定值控制”或“调节控制”）and Servo Control（”伺服控制”或“跟踪控制”） Examples：continuous processes and batch processes or flight control. Feedforward Control（前馈控制）and Feedback Control （反馈控制） Examples：temperature control system in a heat exchanger. Feedforward Control Feedback Control Compare the advantages and disadvantages of both strategies. Feedforward Feedback Control Types of Control Systems Switch Control（开关量控制）and Continuous Control（连续量控制） Examples: air conditioner control Continuous-Time Control（连续时间控制）and Discrete-Time Control（离散时间控制, 也称“采样控制”, Digital Control, “数字控制”） Examples: control systems based on computers or analog instruments Types of Control Systems (cont.) Multi-input-multi-output Control（MIMO,多输入多输出控制, or “多变量控制” ), Single-input-single-output Control （SISO, 单输入单输出控制）and Multi-loop Control（多回路控制） Examples: distillation column control Linear Control（线性控制）and Nonlinear Control（非线性控制） Examples: pH control Multi-loop Control for Distillation Basic Process Control Strategies Single-loop PID (单回路PID控制) Cascade Control (串级控制) Ratio Control (比值控制) Override or Selective Control (超驰或选择控制）etc. Features: PID based, simple, no model needed, easy tuning, and for SISO systems. Advanced Process Control (先进控制，APC) Strategies Feedforward Control (前馈控制) Dead-time Compensation (纯滞后补偿) Decoupling (解耦), Predictive Control (预测控制） Adaptive Control (自适应控制), etc. Features: Model based, complicated, computer needed, and most for MIMO or SISO systems with long dead-time. Primary Tasks of the Course(课程的基本任务) To analyze, design and implement the control strategies or controller for continuous controlled processes Techniques Correlative to Process Control Engineering Problem 1.1 For the level control system, if the following relations are satisfied: Please describe its CV, SV, MV, DVs, control objective as well as its control diagram. where A represents the sectional area of