A pumping control unit is disclosed herein. The pumping control unit includes a processor coupled to a memory and a communication interface. The memory is configured to store an invariant matrix. The communication interface is configured to receive a plurality of measurements of a time-varying parameter for a rod pumping unit. The plurality of measurements is taken at a surface of a pumping site over a pump cycle for a sucker rod string. The processor is configured to gain access to the invariant matrix in the memory and the plurality of measurements from the communication interface. The processor is further configured to compute a Fourier coefficient array based on the invariant matrix and the plurality of measurements. The processor is further configured to compute a time-varying downhole parameter based on the Fourier coefficient array and a sucker rod string model.

A motor drive device and a motor drive method for a vehicle electric pump. The device and the method set a target value according to an instruction value of a motor control amount and control the motor of the vehicle electric pump based on the target value. When the instruction value is greater than an actual control amount, the instruction value is set to the target value. Meanwhile, when the instruction value is less than the actual control amount, the actual control amount is set to the target value when the actual control amount is less than a value less than a previous target value by a predetermined value, and the value less than previous target value by predetermined value is set to the target value of this time when the actual control amount is greater than the value less than previous target value by predetermined value.

A hydraulic pressure control device comprising: a hydraulic sensor provided between a hydraulic pump and a load; a speed command arithmetic unit configured to output a speed command value Vc based on a difference between a hydraulic pressure detection value Pd from the hydraulic sensor and a hydraulic pressure command value Pc; a torque command value arithmetic unit configured to calculate a torque command value Tc based on a difference between a speed detection value Vd of a motor and the speed command value Vc; a current controller configured to control current of the motor based on the torque command value Tc; and a hydraulic pressure abnormality detector configured to detect whether a hydraulic circuit has abnormality based on the speed command value Vc and an operating condition of the load of the hydraulic circuit commanded from an upper-level control device.

There is provided a technique that includes: a main controller configured to execute a process recipe including a plurality of steps to perform a predetermined process on a substrate so as to acquire device data when executing the process recipe; and a storage part configured to store the acquired device data, wherein the main controller is configured to: acquire the device data in a predetermined specific step among the steps constituting the process recipe; calculate a value of the acquired device data in the specific step; compare the calculated value with a value of the device data in the specific step calculated at a time of previous execution of the process recipe; and generate an alarm when the calculated value shows a predefined tendency.

A method of operating a compressor includes obtaining a harmonic series representation of speed variation as the rotor rotates through each revolution. The method includes regulating an electric motor to compensate for or cancel out the periodic speed variation. Specifically, the method includes calculating an electromagnetic torque using a torque control input model based on the speed error and the harmonic series representation of the speed error. The operation of the electric motor is then adjusted such that the electromagnetic torque applied by the motor cancels out the speed variation such that noise and vibrations are minimized.

A dynamic compressor control is provided. The dynamic compressor control includes sensors to sense operating parameters of a compressor and a compressor analytic software package. The compressor analytic software package uses the sensed operating parameters of the compressor to generate key performance indicators. The key performance indicators are used to calculate process variables for the compressor. The dynamic compressor control uses the sensed operating parameters and the process variables calculated from the key performance indicators to provide operating alarms and/or shutdowns.

A sensor system for determining a condition associated with a piston rod of a reciprocating system includes an interrogator system having a first antenna. The sensor system further includes a second antenna separated from the first antenna by an air gap distance. The second antenna is configured to be coupled to the piston rod of the reciprocating system. The second antenna is a patch antenna and is configured to communicate with the first antenna through a range of translational movement relative to the first antenna. The sensor system further includes a radio frequency sensor coupled to the second antenna. The radio frequency sensor is configured to be coupled to the piston rod of the reciprocating system, measure a characteristic associated with the piston rod of the reciprocating system, and transmit data associated with the characteristic to the first antenna of the interrogator system through the second antenna.

An electric pump system and method of operating the same involves pumping a fluid through a fluid passageway defined in a mechanical pump from a pump inlet to a hollow shaft of a motor, through the hollow shaft to an internal motor cavity defined by a housing of the motor, and through another fluid passageway defined in the motor housing and mechanical pump that leads to a pump outlet. The system and method further involve pumping the fluid through another fluid passageway defined in the mechanical pump from yet another pump inlet to the pump outlet. The temperature of fluid exiting the hollow shaft can be assessed and used by an electronic control unit (ECU) of the electric pump system to control the same. The electric pump system can be part of a cooling and lubrication system for an electric vehicle transmission, gearbox, differential or transfer case, for example.

A malfunction diagnosing device that includes pistons arranged in a circumferential direction and discharges oil with rotation in the circumferential direction is provided, including: a pressure sensor for detecting a pressure value of oil discharged from a hydraulic pump in rotation; a speed sensor for detecting a rotation phase of the hydraulic pump at a time when a pressure value of oil is detected by the pressure sensor; a phase calculation part; and a rendering part for rendering a model of a relationship between pressure values of oil detected by the pressure sensor and rotation phases of the hydraulic pump detected by the speed sensor and the phase calculation part to thereby obtain pulsating waveform data. This makes it possible to diagnose a malfunction of the hydraulic pump without influence of a change in a rotation speed of the hydraulic pump.

A hydraulic motor apparatus includes a motor housing engaged to an end cap having a first porting system and an adapter connected to an external surface of the end cap and having a second porting system. A filter may be attached to the adapter and connected to the second porting system and a pressure reducing valve in the adapter is connected to the second porting system. The assembly may also include a controller operatively connected to the pressure reducing valve and system sensors measuring parameters affected by the output of the hydraulic motor apparatus, whereby the pressure reducing valve is operatively controlled by the controller in response to input from the system sensors.