Laboratory for a First Course in Modeling and Automatic Control

This paper describes laboratory experiments to support mechanical engineering courses in modeling and automatic control theory. The paper begines with discussions of the goals for the experiments and the constraints under which the experiments must be designed. The course objectives which are supported by the laboratory are teaching of modeling, parameter identification, classical control methods, and digital implementation of control strategies. In addition, the laboratory demonstrates to mechanical engineering students how they can use micro processors in design. The main constraints which influenced the design of experiments to meet these objectives are cost, the large number of students who will use the lab, and the need to vary the experiments regularly. The decision on whether to purchase "canned" experiments or to design and construct personalized systems is considered based on these objectives and constraints. The experiments used at Texas A&M are reviewed and relative success with each is discussed. The experiments include: 1. A compound pendulum which is used to introduce the students to digital data acquisition and parameter identification. 2. A motor driven rotary table which is used for experiments on parameter identification, simulation, and both analog and digital control. 3. A coupled tanks system which is used for experiments on parameter identification and simulation. and a control project. 4. A motorized cart which is very versatile and is used for a variety of modeling, parameter identification, and control experiments on projects.