Sensorless position control of direct driven hydraulic actuators

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussa




This study investigates sensorless position control of valveless pump-controlled hydraulic actuators for non-road mobile machinery (NRMM). The utilized hydraulic systems are direct driven hydraulics (DDH), a type of electrohydrostatic actuators (EHA), which uses an electric servomotor to drive hydraulic pumps of a single actuator. The advantages of DDH over traditional valve-controlled hydraulics are increased energy efficiency due to elimination of the valve losses and improved controllability. The servomotor driven pumps provides a possibility for sensorless position control of hydraulic cylinders without need for sensors. The sensorless position control was realized by simulating the interaction of DDH units and hydraulic cylinders of a testbed prototype hybrid mining loader. Measured data from a test work cycle was used to test the accuracy of the simulation. The results showed that accuracy with maximum error of about 30 mm could be achieved with no load and with 1000 kg load.


Otsikko10th JFPS International symposium on Fluid Power, Fukuoka
TilaJulkaistu - 24 lokakuuta 2017
OKM-julkaisutyyppiD3 Ammatillisen konferenssin julkaisusarja
Tapahtuma JFPS International Symposium on Fluid Power - Fukuoka, Japani
Kesto: 24 lokakuuta 201727 lokakuuta 2017
Konferenssinumero: 10


Conference JFPS International Symposium on Fluid Power

ID: 14806561