Sensorless Position Control For Electro-Hydraulic System–A technological status review

Physical sensors have traditionally been used to obtain position information. These sensors possess certain deficiencies, such as a dependency on the working environment. Nevertheless, by removing the position sensors as well as defining methods and algorithms, it will be possible to indirectly obtain data from other present sensors. This paper surveys studies on sensorless position control on electric motors and hydraulic systems by reviewing the offered methods, their advantages and disadvantages, and future trends. By understanding the sensorless techniques in electrical motors and hydraulic systems, the future trends of electro-hydraulic systems will have a vast potential for improvement.