Sensorless control scheme for teleoperation with force-feedback, based on a hydraulic servo-mechanism, theory and experiment

摘要

Telemanipulation systems with force-feedback are being developed from early 70's. These devices were successfully applied for remote manipulation of objects at very large distances. These types of manipulator systems are also applied in hostile environments. This work includes development of a new approach to a control design in bilateral teleoperation with force-feedback. The new control scheme does not require the force sensor placed between the manipulator body and objects of an environment. Presented approach estimates the value of environmental force impact on the manipulator body by an inverse mechanical model of the Slave subsystem. Prediction of the inverse model requires information about the value of current position of a manipulator joint. Presented system uses model estimated on-line, during manipulation tasks. Research was carried out on a hydraulic servo-mechanism test stand. The work ends with the report from the test stand and conclusions.