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Identification of friction in pneumatic linear drive

The presented paper deals with measurements and modeling friction process in linear pneumatic actuators. There are described two friction models. The first model is static, the second is dynamic. In particular, it is a Striebeck and Lund-Grenoble model. The used method of measurement of friction on real pneumatic drive DGPL 25-900-PPV-A-KF-B is described together with chosen results of measurements. For example, it is dependency of friction force on velocity, dependency of deflection of carriage of pneumatic drive on load. The comparison of mathematical model with real system is presented at the final part of the paper.