Abstract: A method for determining mass differential in a hot gas path component of a gas turbine includes monitoring operational conditions of the gas turbine; determining whether changes in a gas turbine wheelspace temperature has occurred; determining whether a wheelspace temperature has changed by comparing the wheelspace temperature to at least one of a compressor inlet temperature and a compressor discharge temperature indicates a change in temperature; in response to determining the wheelspace temperature indicates a change in temperature has occurred; determining whether at least one of the following exists: a gas turbine exhaust temperature indicates a simultaneous change with the temperature change between wheelspace temperature compared to the at least one of the compressor inlet temperature and the compressor discharge temperature, and a gas turbine vibrational change.

Abstract: A system for performance monitoring of power plants is provided. The system includes a plurality of power plants respectively owned and operated by a plurality of customers, a monitoring center, at least one of the customers and the monitoring center including a plurality of analytic algorithms configured to automate performance anomaly detection, alarming, analytics and prognosis and a secured network by which on-site monitoring (OSM) data generated at each of the plurality of the power plants is receivable by the monitoring center. The monitoring center is configured to analyze the OSM data along with site specific data for each respective power plant in accordance with the plurality of analytics algorithms to derive trends and to take action with respect to each respective power plant in accordance with changes and abnormalities indicated by the derived trends.

Abstract: A control system for a machine is disclosed. The control system may have a pump, a low pressure reservoir, and at least one actuator connected to receive fluid pressurized by the pump and discharge fluid to the low pressure reservoir. The control system may also have a bypass passage situated to allow fluid to bypass the at least one actuator, and a warmup valve disposed within the bypass passage and being movable between a flow-passing position and a flow-blocking position. The control system may further have a hydraulic temperature sensor configured to generate a signal indicative of a temperature of the fluid, and a controller in communication with the pump, the warmup valve, and the hydraulic temperature sensor. The controller may be configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, and adjust an input speed of the pump in response to the signal.

Abstract: A method is provided for operating a machine. The method includes receiving data relating to a current state of multiple parameters. The method also includes determining a parameter signature for each parameter of the multiple parameters based on the received data. In addition, the method includes comparing each parameter signature to reference data to determine which operating modes of the machine are indicated by each parameter signature. The method further includes adjusting one or more components of an implement control system according to the operating mode indicated by a threshold number of parameter signatures.

Abstract: A method of calibrating an electrically controlled hydraulic valve having a known relationship between flow rate through the valve and displacement of a valve element is disclosed. The method includes ascertaining a first current level for actuating the electrically controlled hydraulic valve to move the valve element to a position adjacent an inlet port, and a first displacement of the valve element responsive to the first current level. The method also includes ascertaining a second current level for actuating the electrically controlled hydraulic valve to move the valve element from the position adjacent the inlet port to a position permitting flow through the inlet port, and ascertaining a second displacement of the valve element responsive to the second current level. The method further includes establishing a relationship between current and displacement associated with the electrically controlled hydraulic valve.

Abstract: A control system for a machine is disclosed. The control system may have a pump, a low pressure reservoir, and at least one actuator connected to receive fluid pressurized by the pump and discharge fluid to the low pressure reservoir. The control system may also have a bypass passage situated to allow fluid to bypass the at least one actuator, and a warmup valve disposed within the bypass passage and being movable between a flow-passing position and a flow-blocking position. The control system may further have a hydraulic temperature sensor configured to generate a signal indicative of a temperature of the fluid, and a controller in communication with the pump, the warmup valve, and the hydraulic temperature sensor. The controller may be configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, and adjust an input speed of the pump in response to the signal.

Abstract: A method is provided for operating a machine. The method includes receiving data relating to a current state of multiple parameters. The method also includes determining a parameter signature for each parameter of the multiple parameters based on the received data. In addition, the method includes comparing each parameter signature to reference data to determine which operating modes of the machine are indicated by each parameter signature. The method further includes adjusting one or more components of an implement control system according to the operating mode indicated by a threshold number of parameter signatures.

Abstract: A method of calibrating an electrically controlled hydraulic valve having a known relationship between flow rate through the valve and displacement of a valve element is disclosed. The method includes ascertaining a first current level for actuating the electrically controlled hydraulic valve to move the valve element to a position adjacent an inlet port, and a first displacement of the valve element responsive to the first current level. The method also includes ascertaining a second current level for actuating the electrically controlled hydraulic valve to move the valve element from the position adjacent the inlet port to a position permitting flow through the inlet port, and ascertaining a second displacement of the valve element responsive to the second current level. The method further includes establishing a relationship between current and displacement associated with the electrically controlled hydraulic valve.

Abstract: A method for calibrating a valve having a valve element movable between a flow blocking position and a flow passing position includes pressurizing fluid directed to the valve, increasing a current directed to the valve for controlling a position of the valve element, and sensing a pressure of the fluid. The method for calibrating the valve also includes determining if a time-derivative of the sensed fluid pressure is greater than a predetermined threshold over a predetermined period of time, and determining a cracking point current command directed to the valve. The cracking point current command is directed to the valve when the time-derivative of the sensed fluid pressure is greater than the predetermined threshold.

Abstract: A method for calibrating a valve having a valve element movable between a flow blocking position and a flow passing position includes pressurizing fluid directed to the valve, increasing a current directed to the valve for controlling a position of the valve element, and sensing a pressure of the fluid. The method for calibrating the valve also includes determining if a time-derivative of the sensed fluid pressure is greater than a predetermined threshold over a predetermined period of time, and determining a cracking point current command directed to the valve. The cracking point current command is directed to the valve when the time-derivative of the sensed fluid pressure is greater than the predetermined threshold.