Abstract: A valve assembly includes an electronics housing and a valve housing assembly engaged to the electronics housing. The valve housing assembly includes a valve body defining a plurality of fluid ports in fluid communication with the valve bore. A plurality of fluid dampeners is disposed in the fluid ports. A sensor plate is engaged to the valve body. The sensor plate defines a plurality of sensor ports that are generally aligned with the fluid ports of the valve body. At least four fluid sensors are disposed in the plurality of fluid ports of the valve body. A cover is engaged to the sensor plate. The cover defines a cavity. A circuit board is disposed in the cavity of the cover. The circuit board is in electrical communication with the fluid sensors.

Abstract: A hydraulic actuator control system for controlling the motion of a master actuator and at least one slave actuator may include an external supervisory computer for sending command signals. A hydraulic control system may be connected to the master actuator and the supervisory computer. The hydraulic control system may include a microprocessor and a master hydraulic control valve for controlling the flow of a pressurized fluid to the master actuator based on the command signals. The hydraulic actuator control system may include at least one slave actuator having at least one slave sensor connected to the microprocessor and having at least one slave control valve for controlling the flow of pressurized fluid to the slave actuator. The slave control valve and the slave sensor may be controlled by the microprocessor.

Abstract: A valve assembly includes an electronics housing and a valve housing assembly engaged to the electronics housing. The valve housing assembly includes a valve body defining a plurality of fluid ports in fluid communication with the valve bore. A plurality of fluid dampeners is disposed in the fluid ports. A sensor plate is engaged to the valve body. The sensor plate defines a plurality of sensor ports that are generally aligned with the fluid ports of the valve body. At least four fluid sensors are disposed in the plurality of fluid ports of the valve body. A cover is engaged to the sensor plate. The cover defines a cavity. A circuit board is disposed in the cavity of the cover. The circuit board is in electrical communication with the fluid sensors.

Abstract: A valve assembly includes an electronics housing and a valve housing assembly engaged to the electronics housing. The valve housing assembly includes a valve body defining a plurality of fluid ports in fluid communication with the valve bore. A plurality of fluid dampeners is disposed in the fluid ports. A sensor plate is engaged to the valve body. The sensor plate defines a plurality of sensor ports that are generally aligned with the fluid ports of the valve body. At least four fluid sensors are disposed in the plurality of fluid ports of the valve body. A cover is engaged to the sensor plate. The cover defines a cavity. A circuit board is disposed in the cavity of the cover. The circuit board is in electrical communication with the fluid sensors.

Abstract: A hydraulic actuator control system for controlling the motion of a master actuator and at least one slave actuator may include an external supervisory computer for sending command signals. A hydraulic control system may be connected to the master actuator and the supervisory computer. The hydraulic control system may include a microprocessor and a master hydraulic control valve for controlling the flow of a pressurized fluid to the master actuator based on the command signals. The hydraulic actuator control system may include at least one slave actuator having at least one slave sensor connected to the microprocessor and having at least one slave control valve for controlling the flow of pressurized fluid to the slave actuator. The slave control valve and the slave sensor may be controlled by the microprocessor.

Abstract: A valve assembly includes an electronics housing and a valve housing assembly engaged to the electronics housing. The valve housing assembly includes a valve body defining a plurality of fluid ports in fluid communication with the valve bore. A plurality of fluid dampeners is disposed in the fluid ports. A sensor plate is engaged to the valve body. The sensor plate defines a plurality of sensor ports that are generally aligned with the fluid ports of the valve body. At least four fluid sensors are disposed in the plurality of fluid ports of the valve body. A cover is engaged to the sensor plate. The cover defines a cavity. A circuit board is disposed in the cavity of the cover. The circuit board is in electrical communication with the fluid sensors.

Abstract: A device for controlling the motion of a fluid actuator which includes an electrically operated control valve that controls the flow of a pressurized fluid to and from the fluid actuator in response to signals generated by an actuator controller which uses an on-board, user programmable microprocessor where the user can download various control algorithms into the microprocessor for controlling the motion of the actuator based on such parameters as fluid pressure and flow rates and actuator displacement. Various external sensors can be connected to the controller for monitoring and control purposes using various signal interfaces such as an analog to digital converter or an SSI interface.

Abstract: A metering pump incorporates a method of relating inner loop current to a pump output pressure. Pump/motor speed, which correlates to current, is measured and controlled by a system controller. System temperature is also measured by the system controller. The controller monitors the measured system temperature and provides for compensation for system losses, including inductive-resistive (IR) losses, and for density and viscosity shifts, within a pre-determined allowable system temperature operating range. An initial system calibration is conducted using a “shut-off” test, where the metering pump is run at a very slow known speed while the system is shut-off. After initial start-up, a health-monitoring feature continues to monitor the current as an indicator of pump performance and continuously adjusts a motor speed to maintain a desired level of pump performance.