A work machine and method for a work machine with an open center hydraulic system for controlling actuation of an implement includes an implement control valve, an electro-hydraulically controlled pump, a hydraulic circuit coupled to the implement actuator, and a pressure transducer positioned for measuring a pressure in the hydraulic circuit between the pump and the implement control valve. A calibration system for calibrating the pump includes a controller having a non-transitory computer readable medium having a program instruction for causing a processor to calibrate a first threshold for the pump in a pump-flow curve wherein the first threshold including a minimum current command to actuate the pump; determine a hysteresis band in the pump-flow curve; and calibrate a second threshold for the pump in the pump-flow curve wherein the second threshold including a maximum current command to actuate the pump below a relief setpoint.

A method and apparatus for autonomous control of a microgrid load. In one embodiment, the method comprises determining, by a load controller that comprises a processor and is part of a load in a microgrid, a primary control response based on at least one grid parameter measured locally with respect to the load; and modifying, by the load controller, operation of the load based on the primary control response.

A method and apparatus for controlling a microgrid load. In one embodiment, the method comprises measuring at least one grid parameter of a microgrid transmission line coupled to a load in a microgrid; computing, using the at least one grid parameter and a droop control technique, at least one virtual set-point; determining a modification to operation of the load based on the at least one virtual set-point; and modifying operation of the load based on the modification.

A first table defines the relationship between the sliding resistance index k of a packing gland and the ambient temperature for each type of the packing gland is provided. A second table defines control parameters corresponding to hysteresis levels for each size of the setting/operating device is provided. By repeating, at regular intervals, the acquisition of the sliding resistance index k at present corresponding to the ambient temperature at present and the type of a packing gland from the first table and the selection of the control parameter corresponding to the size of the setting/operating device and the hysteresis level obtained from the sliding resistance index k at present from the second table, the valve opening of the regulating valve is controlled using the selected control parameter.

The invention relates to a method (200) for controlling an angular position of an output shaft in a drive unit (100), comprising the steps of: detecting a change in direction of a drive apparatus (5), detecting the torque transmitted by a flexible ring (6.3) of a strain wave gear immediately upon detection of the change in direction by means of a second sensor (12), determining a drive period of the drive apparatus (5) until the expected attainment of a transmission torsion (14.1, 14.2) of the flexible ring (6.3) on the basis of the first torque, driving a drive shaft (4) by means of the drive apparatus (5) over the drive period, detecting a change in angular position of the output shaft immediately after the end of the drive period by means of a first sensor (11.1), and controlling the drive apparatus using the first sensor (11.1) following the drive period when a change in angular position is detected.

A work machine and method for a work machine with an open center hydraulic system for controlling actuation of an implement includes an implement control valve, an electro-hydraulically controlled pump, a hydraulic circuit coupled to the implement actuator, and a pressure transducer positioned for measuring a pressure in the hydraulic circuit between the pump and the implement control valve. A calibration system for calibrating the pump includes a controller having a non-transitory computer readable medium having a program instruction for causing a processor to calibrate a first pump threshold for the pump in a pump-flow curve wherein the first pump threshold including a minimum pump control signal to actuate the pump; determine a hysteresis band in the pump-flow curve; and calibrate a second pump threshold for the pump in the pump-flow curve wherein the second pump threshold including a maximum pump control signal to actuate the pump below a relief setpoint.