Ponpunwattana Abstract Abstract Typical industrial-type robot manipulators have high structurally stiffness. Their controller designs are usually based on the models which treat the manipulators as a series of rigid links. In applications of high precision positioning control, however, there is a level of tolerance such that the flexibility in the links must be considered in the controller design. Another difficulty in robot control is friction.
Friction exists in most physical manipulators and mechanical control systems.
It consists of a flexible drive train, a flexible link, and adjustable friction and backlash mechanisms. Although this test bed has capability to add backlash into the system, this talk will focus on modelling and control of the test bed under the influence of friction only. The model of the test bed was developed using Kane's method together with the assumed-modes method. Several analytical mode shapes were investigated. Experimental frequency response tests were used to be the criteria for evaluating the accuracy of the linearized model.