Hydraulic control loading system based on position control

The force feel simulation principle of hydraulic control loading system based on position control was analyzed, which indicates that the fidelity of force feel simulation depends on the band width of the position control loop, total linkage stiffness and position disturbance caused by the control force. The design the of band width and total linkage stiffness according to simulation fidelity requirement and the characteristics of the simulated object is discussed based on theoretical analysis with the help of computer simulation. The design principles are that the band width of the position control loop is supposed to equal 10 times the value of the natural frequency of the simulated object, and the total linkage stiffness is supposed to equal 3 to 10 times the value of hydraulic spring stiffness Finally, the design method of the hydraulic control loading system based on the position control loop was developed and proved feasible by computer simulation in the frequency and time domains.