A poppet valve assembly for a high-speed compressor, the poppet valve assembly including a cage that includes a plurality of counter bores disposed therein. The poppet valve assembly further includes a plurality of poppets, each poppet having a stem and a head. The head of each poppet has a maximum diameter that is less than approximately 0.75 inches. The stem of the poppet is disposed in each of said counter bores. The poppet valve assembly also includes a seat plate overlying said cage, said seat plate including a plurality of through bores axially aligned with the counter bores of the cage. Each through bore is sized to have a smaller diameter than the maximum diameter of the head. A lift spacer is disposed in each of the counter bores.

Poppet valve assembly, system, and apparatus for use in high speed compressor applications

A system and method for monitoring a condition of a monitored system. Estimates of monitored parameters from a model of the system provide residual values that can be analyzed using a sequential probability ratio test (“SPRT”). The invention employs empirically derived distributions in the SPRT to provide more accurate and sensitive alerts of impending faults, breakdowns and process deviations. The distributions can be generated from piecewise continuous approximation or spline functions based on the actual distribution of residual data to provide improved computational performance. The distributions can be provided before monitoring, or can be updated and determined during monitoring in an adaptive fashion.

Residual signal alert generation for condition monitoring using approximated SPRT distribution

Provided is a multiprocessor system and a compiler used in the system for automatically extracting tasks having parallelism from an input program to be processed, performing scheduling to efficiently operate processor units by arranging the tasks according to characteristics of the processor units, and generating codes for optimizing a system frequency and a power supply voltage by estimating a processing amount of the processor units

Multiprocessor system and multigrain parallelizing compiler

A method and apparatus are provided for diagnosing faults in a monitored system that is monitored by sensors. An empirical model is generated for a targeted component of the monitored system. The empirical model is trained with an historical data source that contains example observations of the sensors. Substantially real-time estimates are generated based on instrumented data corresponding to the targeted component. The substantially real-time estimates are compared and differenced with instrumented readings from the sensors to provide residual values. The residual values are analyzed to detect the faults and determine a location of the faults in the monitored system.

Kernel-based method for detecting boiler tube leaks

An apparatus and associated method are utilized for monitoring an operation of a system characterized by operational parameters. A non-parametric empirical model generates estimates of parameter values in response to receiving a query vector of monitored parameters for a model characterizing the system. A distance estimation engine (a) determines robust distances between the query vector and each of a set of predetermined historical vectors for the non-parametric empirical model based on an implementation of an elemental kernel function; (b) determines weights for the monitored parameters based on the robust distances; and (c) combining the weights with the predetermined historical vectors to make predictions for the system.

Robust distance measures for on-line monitoring

A method is proposed for the monitoring of a plant having a plurality of sub-systems which is operable at variable working points. Respective measured values are detected for a fixed set of process parameters (B, U, S1, . . . , SN) at pre-settable time intervals during the operation of the plant (1). The measured values detected in a learning phase for different working points are used to prepare models (M1, M2, . . . , MN) for the operating characteristics of the sub-systems (11, 12, . . . , 1N). At least one monitoring parameter (Ri, Rik), which is independent of the respective current working point, is determined at pre-settable time intervals in an operating phase using the models (M1, M2, . . . , MN) and the time-dependent course of the monitoring parameter (Ri, Rik) is used for the monitoring of the plant (1). A pre-check (2) is carried out prior to the determination of the monitoring parameter (Ri, Rik), in which a check is made whether at least the measured values for those process parameters which are operating parameters (B) are within a pre-determined range.

Method for the monitoring of a plant

The invention relates to an actively controlled valve (1) having a housing (6) and comprising a displaceably supported valve plate (4) having aperture openings (4a) and a counter plate (2) disposed in a fixed manner relative to the housing (6) and having aperture openings (2a), wherein the valve plate (4) is slidably supported relative to the counter plate (2), such that the penetration openings (2a, 4a) form an open or closed aperture (24), and comprising a drive device (8) driving the valve plate (4), wherein the valve plate (4) is connected to the drive device (8) by means of a drive spring (7), and an actuatable clamping device (10) is provided for fixing the location of the valve plate (4).

Actively controlled valve and method for operating an actively controlled valve

The method involves performing a pre-check to determine if at least the measured values for process parameters that are operating parameters (B) lie within a predetermined range, prior to determining monitoring parameters (Ri,Rik). The pre-check may involve determining a machine model (MA) whose input parameters are operating parameters, and whose output parameters include a machine model value (YA) for at least one of the operating parameters (B).

Method for monitoring an installation

The invention relates to a sealing assembly (1) for sealing a piston rod (2) of a piston compressor, which piston rod extends in an axial direction (A) and can be moved back and forth in the axial direction (A). Said sealing assembly (1) comprises at least one packing chamber (4), wherein the packing chamber (4) is bounded in the axial direction (A) by a first and a second side wall (5, 6), wherein at least one sealing ring (7) or one scraping ring (8) and a spring device (9) are arranged in the packing chamber (4), and wherein a spring device (9) and at least one sealing ring (7) or one scraping ring (8) are arranged one after the other in the axial direction (A) proceeding from the first side wall (5), wherein the sealing ring (7) or the scraping ring (8) lies against the second side wall (6), and wherein the spring device (9) is designed as a magnetic spring and consists of two assemblies (9a, 9b) spaced apart in the axial direction (A), a first assembly (9a) and a second assembly (9b), wherein each assembly (9a, 9b) comprises at least one magnet (10a, 10b), and wherein the magnets (10a, 10b) are arranged in the two assemblies (9a, 9b) in a mutually matched manner in such a way that the two assemblies (9a, 9b) repel each other.

Sealing assembly and method for the operation thereof

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Method for the monitoring of a plant

Actively controlled valve and method for operating an actively controlled valve

Method for monitoring an installation

Sealing assembly and method for the operation thereof