Friction identification and control of ball screw driven system using PLC

An Autotuning Procedure for Motion Control Systems: Method and at-the-edge Implementation

“…Extensive research has been conducted to develop computationally simple yet highly effective algorithms [6]- [8]. These algorithms serve the purpose of estimating the primary dynamics of the system.…”

Development of Precision Positioning Stage

“…Lubricants like oil or grease are frequently used to reduce the e®ect of friction but there may also be a dry contact between the surfaces. [16][17][18] Hence, for high precision machines a dual positioning system has been developed, where ball screw actuator and a suppressor unit are used. In the proposed system in order to attain better accuracy, a high-response AC servo motor with a rotary encoder is used.…”

Ensemble Grey and Black-Box System Identification for Friction Models

“…The estimation of the dynamic parameters of the EMPS considers eight different friction models, as introduced in Chapter 4, four symmetric and four asymmetric. Here the most common version of the F s T friction model was adopted [170][171][172]. The specific parameters of each algorithm are set as suggested in the literature [126], they can be found in Tables 6.10 and 6.11.…”

“…It is common to find Equation (4-10) rewritten as (4-11) [170][171][172], in this case v s can be the Stribeck velocity. Modified versions of this model were also proposed by [173] and [174].…”