A system and method for detecting faults and optimiz-ing power usage of solenoid valves. The method includes obtaining a current signature of the solenoid coil, using a dedicated circuit to detect various features and using a pulse width modulation controller optimize the power output of the system. Additionally, using machine learning, the system can be optimized using data from the dedicated circuit.

A milling machine may have a frame, ground engaging tracks that support the frame, and an actuator that adjusts a height of the frame relative to the track. The milling machine may have a control valve that selectively controls a flow of fluid into or out of the actuator based on the current supplied to the control valve. The milling machine may have a controller that determines the amount of current required to operate the actuator at a nominal actuator velocity and supplies that current to the control valve. The controller determines a measured actuator velocity based on a time required to extend or retract the actuator by a predetermined length, and adjusts the amount of current based on the measured and nominal actuator velocities. The controller also supplies the adjusted amount of current to the control valve to adjust the height of the frame relative to the track.

A system including a pneumatic actuator having an actuator element, the system further including a compressed-air provision device which is configured to carry out a closed-loop position control of the actuator element by applying compressed air to the pneumatic actuator. The compressed-air provision device is further configured to carry out an assistance procedure in which the actuator element is set in an oscillation movement, pressure values and position values are detected, and, on the basis of the detected pressure values and the detected position values, friction information and/or mass information is determined and/or verified.

A system including a pneumatic actuator having an actuator element, the system further including a compressed-air provision device which is configured to carry out a closed-loop position control of the actuator element by applying compressed air to the pneumatic actuator. The compressed-air provision device is further configured to carry out an assistance procedure in which the actuator element is set in an oscillation movement, pressure values and position values are detected, and, on the basis of the detected pressure values and the detected position values, friction information and/or mass information is determined and/or verified.

The present invention relates to a device for detecting leaks in a hydraulic cylinder, comprising: a first pressure sensor for detecting a pressure value in a first pressure chamber of a hydraulic cylinder, a second pressure sensor for detecting a pressure value in a second pressure chamber of the hydraulic cylinder, an evaluation unit for continuously detecting the pressure values of the first pressure sensor and the second pressure sensor, the evaluation unit being designed to detect a leak, preferably an internal leak, in the hydraulic cylinder that deviates from the norm based on the pressure values recorded by the first pressure sensor and the second pressure sensor.

A sensor system for a dual bottle accumulator utilized with a subsea blowout preventer that monitors piston position with a position sensor in the hydraulic bottle, the gas pressure in the associated gas bottle with one or more pressure sensors, and sensors and remote actuators for associated valves.

A system and method for the controlled lowering and lifting of a load are disclosed. The system and method may include operating a work machine having a hydraulic system including a hydraulic actuator for supporting a load, a first control valve in fluid communication with the actuator, and a controller for operating the first control valve. In one embodiment, the controller includes a first algorithm for operating the first control valve in a load lowering operation. When an operational fault within the hydraulic system is detected, the controller can be configured to enter into a safe lowering mode. In the safe lowering mode, the first algorithm is disabled and a pulse width modulation (PWM) current is sent from the controller to the first control valve. A user interface is provided to allow an operator to control the PWM current duty ratio to allow the load supported by the actuator to be lowered.

A remote wireless hydraulic cab preferably includes a cab member, a hydraulic sensor block, an electrical bulkhead, a cab bridge controller and a cab transceiver. The cab member preferably includes a cab enclosure, two hydraulic joysticks, two hydraulic treadles and electrical equipment. The hydraulic sensor block includes a sensor block and a plurality of hydraulic pressure sensors. Hydraulic lines from the joysticks and treadles are connected to the sensor block. Pressure measurements from the joysticks and treadles are sent from the plurality of hydraulic pressure sensors to the cab bridge controller. The cab bridge controller sends signals for wireless transmission through a cab wireless transceiver to a frame transceiver. The electrical equipment is supplied with electrical power and transmits signals through the electrical bulkhead. Electrical power to the cab enclosure is supplied through an electrical generator and hydraulic fluid to the joysticks and treadles are supplied through a hydraulic pump.

A remote wireless hydraulic cab preferably includes a cab member, a hydraulic sensor block, an electrical bulkhead, a cab bridge controller and a cab transceiver. The cab member preferably includes a cab enclosure, two hydraulic joysticks, two hydraulic treadles and electrical equipment. The hydraulic sensor block includes a sensor block and a plurality of hydraulic pressure sensors. Hydraulic lines from the joysticks and treadles are connected to the sensor block. Pressure measurements from the joysticks and treadles are sent from the plurality of hydraulic pressure sensors to the cab bridge controller. The cab bridge controller sends signals for wireless transmission through a cab wireless transceiver to a frame transceiver. The electrical equipment is supplied with electrical power and transmits signals through the electrical bulkhead. Electrical power to the cab enclosure is supplied through an electrical generator and hydraulic fluid to the joysticks and treadles are supplied through a hydraulic pump.

A machine control system can store model weights determined via machine learning using a training dataset correlating preset hydraulic valve displacements to measured movement parameters of a machine component. The machine control system can receive an input command for the component and machine state data from machine sensors. A control mapping model can use the model weights to map a combination of the input command and the machine state data into a predicted displacement of the hydraulic valve that causes movement of the component in response to the input command.