Abstract: A method, and corresponding computer program product and system, defines and uses marker points within a modeled manufacturing process routing that includes multiple sequenced operations. The method includes receiving user input that defines one or more marker points within the modeled manufacturing process routing and between sequential ones of the operations. The marker points define a user-defined point within a manufacturing process and include one of multiple defined types that each define a different use to be made by the marker point. The method also includes detecting if any marker points of a specified one of the defined types have been defined in the manufacturing process routing. If a marker point having the specified one of the defined types is detected, a predefined computing function is executed that uses the detected marker point.

Abstract: A machining simulation apparatus (1) includes a model storage (4) for storing information about machining models (11) that define mechanical elements, such as spindle heads and tables, jig models (12) that define jigs, such as chucks and holders, material models (13) that defines the shapes of workpieces, and tool models (14) that defines the shapes of tools for machining the workpieces. Each tool model comprises a machining tool model (14A) and an interference check tool model (14B). A material model is machined with the machining tool model (14A) according to an axis movement command for cutting feed so as to update the shape of the material model. Subsequently, interference of the interference check tool model with the material model, jig models, and machine models are checked for according to an axis movement command for rapid traverse.

Abstract: A multi-axis fatigue testing device includes a multiple input, multiple output mechanical linkage driven by a plurality of actuators and a controller operating each of the plurality of actuators in real time and in synchronization to produce user-defined multiple fatigue cycle profiles. A startup method enables a sample mounted at an arbitrary multi-axis state to receive a desired simulation profile while maintaining the sample below any of the extremum values of the desired simulation profile.

Abstract: A method predicts and quantifies the threat posed to a human-operated device based on an optimal device trajectory through a constraint-bounded corridor. A model of the device together with a model of anticipated hazards and the current state of both the device and the hazards are used to iteratively generate an optimal device trajectory through a constraint-bounded corridor or region within state space. Device dynamics are forward-simulated over a time horizon. A method generates a threat assessment metric from the resulting sequence of optimal vehicle states. This threat assessment may be used to devise various types and levels of operator assistance. The human operator can control the device within a safe corridor or region. Threat assessment is based on the nearness of successive optimal trajectory predictions to limits of safe device handling rather than on deviation from a predefined path.

Abstract: In a method of computing the overall material constant of a composite material, a virtual composite material is defined as the one that a first material component is dispersed in a form of inner spherical particles in a matrix phase and each of the inner spherical particles is enveloped by the second material component, in a form of outer shell layers, as a coating layer. Based on this, a nonlinear equation is prepared, which has the material constant of the virtual composite material as an unknown. Next, the material constant of the virtual composite material is computed by solving the equation. In the equation, the material constant in each of the surrounding areas of the outer shell layers coating the inner spherical particles is defined as the overall material constant of the virtual composite material to be computed. The volume fractions of the material components in the composite material are computed using the equation.

Abstract: A method for developing a component includes establishing a performance requirement to predict the secondary crystallographic orientation for a component having orthogonal x, y, and z axes. The component is to be formed from a single crystal material having a primary crystallographic orientation along the z-axis and a secondary crystallographic orientation substantially in the x-y plane. A property of the component is computer simulated as a function of an angle of the secondary crystallographic orientation relative to the x-axis. Based on the computer simulation, the angle for the component is selected which will substantially satisfy the performance requirement.

Abstract: A method of analyzing a finite element model of an airfoil assembly. The airfoil assembly comprises a main airfoil element and a plurality of control surfaces. The method comprises: generating a loads interface model of the airfoil assembly comprising: data which defines the spatial positions of a set of nodes, and data which associates each node with either the main element or one of the control surfaces. Load data is generated which defines loads acting on the nodes of the loads interface model, and mapped onto a finite element model to produce a loaded finite element model. A stress analysis is then performed on the loaded finite element model, and the finite element model can be refined as a result of the stress analysis.

Abstract: Methods for predicting a machine event are described. In one aspect, a method includes receiving data for current events for the machine, and determining whether the data for the current events is within operational limits. The method also includes, when the data for the current events is within operational limits, determining, using a predetermined model, whether an anomaly exists, and generating an alert including information on the anomaly when the anomaly exists. Systems and machine-readable media are also described.

Abstract: A simulation apparatus 10 carries out simulation for associated operation equipment 2 provided with a plurality of mobile devices 5a, 5b, 5c, 5d, 7a, 7b, and 7c for operating in association with each other, and a control device 9 with a storage unit for storing a control program in which operation procedures are determined for the mobile devices to output control signals to the mobile devices. The simulation apparatus includes a storage device 10a for storing a simulation program to carry out simulation of the associated operation of the mobile devices on the basis of the control signals, and an arithmetic operation device 10c for receiving the control signals to execute the simulation program on the basis of the control signals.

Abstract: A simulation apparatus includes an arithmetic process unit 20 that models a controlled plant and simulates the operation of the modeled controlled plant, and an interface unit 30 that inputs and outputs a signal between the arithmetic process unit 20 and an ECU 100A, and the arithmetic process unit 20 is configured so as to be capable of inputting and outputting the signal from/to the ECU 100A by using another interface unit 30 provided on another simulation apparatus in addition to the interface unit 30.

Abstract: A method of detecting differences between high level block diagram models using text based analysis. Previous methods of determining differences between high level block diagram models derive differences through traversal of the block hierarchy which is complex and cannot compare differences between models created with third party design environments. The present invention increases interoperability and capabilities of existing circuit design environments, and achieves an advance in the art, by converting high level block diagram models to a user readable text-based format and performing a text-based differential analysis on the converted models to determine differences.

Abstract: A system and method for predicting fatigue life in metal alloys for very high cycle fatigue applications. The system and method are especially useful for cast metal alloys, such as cast aluminum alloys, where a fatigue endurance limit is either non-existent or hard to discern. Fatigue properties, such as fatigue strength in the very high cycle fatigue region, are based on a modified random fatigue limit model, where the very high cycle fatigue strength and infinite life fatigue strength are refined to take into consideration the sizes of the discontinuities and microstructure constituents since the fatigue life scatter depends upon the presence of discontinuities and microstructure constituents. The sizes of the discontinuities and microstructure constituents that can initiate fatigue cracks can be determined with extreme value statistics, then input to the modified random fatigue limit model.

Abstract: A method and a device for position-dependent compliance compensation in a machine tool is disclosed. The compliance of the machine tool is derived at a position of a tool of the machine tool from machine data stored in memory, a machining force acting on the tool during a machining process at this position is determined, and at least one machining parameter that has an influence on the machining process is derived at this position in dependence on the derived compliance and the machining force so as to counteract a displacement of the tool with respect to a desired position caused by the compliance of the machine tool and the machining force. This optimizes the machining time and/or contour fidelity when machining a workpiece with a machine tool.

Abstract: A design support system generates a passing point through which a deformable linear structure in a virtual space according to the instruction of a user via an input device in the edition process and when generating a passing point of type, based on a component such as part or the like in the virtual space by the edition process, automatically generates and manages passing point information including the passing direction of the passing point to be generated, on the basis of the designated component as the reference. A route through which the linear structure should pass is generated using the passing point information of each passing point.

Abstract: Discrete Element Modeling (DEM) of rock subject to high confining pressures, such as in a subterranean drilling environment, may be used to predict performance of cutting structures used in drill bits and other drilling tools, as well as of the tools themselves. DEM may also be used to create “virtual” rock exhibiting specific drillability characteristics with or without specific reference to any actual rock, for purposes of assessing cutting efficiency of various cutting structure configurations and orientations, as well as of drilling tools incorporating same.

Abstract: The present disclosure describes methods and systems for combining Models of goods and services. At least some embodiments include a method that includes retrieving a first Model representing an object, a User controlling access to the first Model; retrieving a second Model representing a product offered by a Product Provider; combining, at the request of the User, the first and second Models, wherein the combining is performed as a first service, by a Service Provider, and wherein the first service comprises computing a simulated physical interaction between the object and the product; generating a representation of the simulated physical interaction; and presenting the representation to the User.

Abstract: The invention provides a method and apparatus for predicting the failure of a component using a probabilistic model of a material's microstructural-based response to fatigue. The method predicts the component failure by a computer simulation of multiple incarnations of real material behavior, or virtual prototyping. The virtual prototyping simulates the effects of characteristics that include grain size, grain orientation, micro-applied stress and micro-yield strength that are difficult to simulate with real specimens. The invention provides an apparatus for predicting the response of a component to fatigue using the method.

Abstract: A method for verifying an inertial unit for a moving body, the unit being mounted on a movement simulator, and the method includes: theoretical modeling of the inertial unit on the movement simulator, supplying theoretical inertial data representing measurement inertial data deemed to be measured by the inertial unit; simulation modeling including modeling of the inertial unit in a real navigation environment, the simulation modeling being fed with control commands and supplying simulation inertial data representing output data from the inertial unit in real navigation environment; calculating control commands as a function of the measurement inertial data, the simulation inertial data, and the theoretical inertial data; and validating the inertial unit by comparing the path of the moving body with a reference path.

Abstract: While a recording mode is being set, a manipulation log about a manipulation target virtual object is recorded in a memory (S301, S302). After the recording mode is canceled, a virtual element as a collision determination target with respect to the manipulation target virtual object is selected from a plurality of virtual elements existing in the same virtual space as the manipulation target virtual object based on the manipulation log (S303). Collision between the manipulation target virtual object and each of at least one selected virtual element is determined (S304). The collision determination result is output (S305).

Abstract: Methods and systems for modeling turbine operation are disclosed. In one embodiment a method for modeling turbine operation may include: determining current performance parameters of a turbine; providing at least one external factor for current or future operation of the turbine; and modeling, by a predictive model, at least one operating characteristic of the turbine based at least in part on the current performance parameters of the turbine and the at least one external factor.

Abstract: A base for holding a wind turbine tower is disclosed. The base includes individual shaft piles, a base cap and anchoring units. The base cap includes reinforcement inserts and is connected to each of the individual shaft piles. The anchoring units are embedded in the base cap and extend in an anchoring direction from the base cap at anchoring locations for anchoring the wind turbine tower to the base cap. Each of the reinforcement inserts extend in a radial direction relative to a center axis of the wind turbine tower. At least one of the plurality of reinforcement inserts, at a radius of the center axis adjacent to an anchoring location of a respective anchoring unit, has a portion of the respective reinforcement insert extending along the anchoring direction.

Abstract: Processing steps are determined and optimized during the production of sheet metal forming parts, for example, using deep drawing/stretch forming processes. During the determination, using a computer-assisted design system, of process operations (PO1-PO6) for the description of forming processes on a forming part, the following steps are carried out: defining geometry models for the computerized description of a geometry of the forming part in a target state; defining several geometry operators (m1-m9, e1-e6), wherein one geometry operator (m1-m9, e1-e6) associates a geometry of an area of a first geometry model with a geometry of an area of a second geometry model, and the geometry operator (m1-m9, e1-e6) describes a transition from one of the two associated geometries to the other one; and defining several groups of respectively at least one geometry operator (m1-m9, e1-e6), wherein each one of the groups is respectively associated with a process operation (PO1-PO6).

Abstract: A method of selecting an arrangement of sectors for a turbomachine nozzle is disclosed. The method includes: A) creating a database of three-dimensional numerical models of the sectors by digitizing; B) setting a criterion for selecting an arrangement of sectors and setting a desired value for said criterion, the criterion being a function of the shapes and the relative positions of the sectors; C) for the various arrangements that are evaluated, determining the relative positions of the sectors when assembled together by performing a virtual assembly, and as a function of said positions, determining the value of the selection criterion for the arrangement under evaluation; and D) retaining the arrangement for which the selection criterion has the value closest to the desired value.

Abstract: A devolatilization simulation apparatus for screw extruders and a devolatilization simulation program for screw extruders can actually simulate the devolatilization process in a screw extruder. An extruder simulation system for simulating the conditions of devolatilization of an extruder by computationally determining the resin temperature, the pressure, the residence time, the filling ratio, the torque, the power, the solid-phase occupancy and the concentration of the volatile components in terms of distribution in the axial direction of the extruder from the configuration and the operating conditions of the extruder and the physical properties of the resin in the extruder comprising a means for arithmetically simulating the process where the concentration of the volatile components contained in the resin gradually falls as they are devolatilized by vent cylinders.

Abstract: Systems and methods for modeling the behavior of an enclosure for use by a control system of an HVAC system are described. A model for the enclosure that describes the behavior of the enclosure for use by the control system is updated based on a weather forecast data. The weather forecast data can include predictions more than 24 hours in the future, and can include predictions such as temperature, humidity and/or dew point, solar output, precipitation. The model for the enclosure can also be updated based on additional information and data such as historical weather data such as temperature, humidity, wind, solar output and precipitation, occupancy data, such as predicted and/or detected occupancy data, calendar data, and data from the one or more weather condition sensors that sense current parameters such as temperature, humidity, wind, precipitation, and/or solar output.

Abstract: A method for providing information associated with configuration changes to a computer system is provided. The method includes receiving a description of a starting configuration and a description of a configuration change. The method further includes linking the description of the starting configuration and the description of the configuration change and reading a record linked to the description of a configuration change, wherein the record includes advice about the configuration change and a total result value indicating a rate of success of the configuration change when the advice is followed. The method further includes receiving a first result value from the user indicating a result of the configuration change in light of the advice and calculating a new total result value that indicates a rate of success of the configuration change based on the total result value and the first result value.

Abstract: A method is provided of emulating and visualizing machine tool behavior for a programmable logic controller logical verification system for manufacturing a motor vehicle. The method includes the steps of constructing a mechanical model. The method also includes the steps of viewing motion of the mechanical model in a motion viewer and determining whether the motion of the mechanical model is acceptable. The method further includes the steps of replicating the motion previously defined with PLC code if the motion of the mechanical model was acceptable and using the accepted motion of the mechanical model to compare the behavior of the PLC code relative to the accepted motion.

Abstract: A system and method for modeling of complete tooth, including root and crown, of a patient to facilitate orthodontic treatment are provided, wherein generic tooth modeling is combined with tooth crown modeling for a patient to yield complete tooth modeling. A generic tooth 3D model for a particular tooth is morphed with a 3D model of a patient's crown for the corresponding tooth to yield a complete 3D model for that tooth. Modeling techniques can be conducted with computer-based systems, such as systems configured for storing patient data and generic tooth data, morphing such data and/or facilitating additional orthodontic treatment applications, through the use of one or more algorithms. Adjustment of the complete tooth model for the tooth can be provided through additional patient information, such as X-ray imaging, to address variations in root shape between a generic root and an actual root shape for a patient.

Abstract: A system for creating a risk analysis for at least one turbomachine includes a database storing characteristics of one or more turbomachines and a processing module coupled to the database that receives the characteristics from the database and creates the risk analysis. The processing module includes a modeling module that creates a representation of the amount of rocking in a particular turbomachine based on the characteristics and a performance modeler coupled to the modeling module and that, based on the representation of the amount of rocking, creates the risk analysis.

Abstract: A method for predicting a tool point response of a spindle-holder-tool assembly to be used for high-speed machining applications is provided. The method includes determining direct and cross displacement-to-force receptances of a standard holder clamped in the spindle. The method also includes determining direct receptances at a free end of the standard holder based upon the determined direct and cross displacement-to-force receptances of the standard holder. Additionally, the method includes performing an inverse receptance coupling to simulate a decomposition of the standard holder into multiple subassemblies, the subassemblies including a spindle-holder base subassembly and an extended holder subassembly. The method further includes determining spindle-holder base subassembly receptances based upon the simulated decomposition of the standard holder.

Abstract: A method for determining resistivity distribution of formations below a bottom of a body of water from transient electromagnetic signals acquired by imparting a transient electromagnetic field into the water and detecting an electromagnetic response thereto at a plurality of spaced apart positions from a place of the imparting includes simulating an air wave response at each of the plurality of spaced apart positions. The simulated air wave response is subtracted from the detected response to produce a subsurface impulse response at each of the plurality of positions. The subsurface impulse responses are used to determine the resistivity distribution.

Abstract: A collision preventing device includes an acceleration/deceleration simulating unit 30 that performs acceleration/deceleration processing based on a moving command generated by a function generation unit 16 according to a method similar to that used by acceleration/deceleration units 18x and 18z and obtains a moving path resulting from the acceleration/deceleration processing, an interference check unit 34 that performs interference check between a mobile member and an interfering object along the moving path generated by the acceleration/deceleration simulating unit 30 and determines whether any interference may occur, a delay unit 32 that successively stores moving commands generated by the function generation unit 16 and successively outputs a moving command having been stored a predetermined time before, and a moving command blocking unit 36 that sends the moving command output from the delay unit 32 to the acceleration/deceleration units 18x and 18z if the interference check unit 34 determines that there

Abstract: A method, apparatus, and computer program product for identifying gaps. A grid of points is generated on a first surface. The grid of points is associated with a point for a first part associated with a second part in a model. A line segment is formed from the first surface of the first part to a second surface of the second part for each point in the grid of points to form a plurality of line segments. A gap size is identified between the first surface and the second surface using the plurality of line segments to form a plurality of gap measurements.

Abstract: Cross-component measurements in combination with standard propagation resistivity measurements are processed to estimate the vertical and horizontal resistivities, relative dip and relative azimuth of an anisotropic earth formation.

Abstract: Systems, methods, and program product to synthesize a grass-roots heat exchanger network for non-thermodynamically constrained problems for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, are provided. An exemplary system includes a heat exchange network synthesizing computer and heat exchange network synthesizing program product configured to analyze the waste heat recovery problem without decomposition to produce a result having an optimal number of network heat exchanger units through application of advanced process-to-process matching schemes for non-thermodynamically constrained problems.

Abstract: A method of constructing a piecewise linear engine performance model, comprises the steps of: (a) providing a non-linear engine performance model which iteratively calculates engine performance variables y from a plurality of sub-models, each sub-model representing the performance of a component of the engine; (b) defining a plurality of engine power conditions, each engine power condition being defined by one or more engine state variables x; (c) for each of the engine power conditions, using the non-linear engine performance model to determine partial derivatives ?y of the engine performance variables y with respect to engine control variables u and with respect to the engine state variables x, the values of the partial derivatives ?y being determined so that, on integrating the partial derivatives ?y, the error between steady state values for the engine performance variables y calculated by the non-linear engine performance model and steady state values for the engine performance variables y calculated

Abstract: A fixed cutter drill bit and a method for designing a fixed cutter drill bit includes simulating the fixed cutter drill bit drilling in an earth formation. A performance characteristic of the simulated fixed cutter drill bit is determined. A side rake angle distribution of the cutters is adjusted at least along a cone region of a blade of the fixed cutter drill bit to change the performance characteristic of the fixed cutter drill bit.

Abstract: A micromechanical system with a system that can vibrate, has a seismic mass and at least two spring elements. The spring elements are respectively fastened on one side externally to the seismic mass and on the other side to fixed anchor points of the micromechanical system such that the seismic mass can vibrate in a movement direction. In order to obtain a particularly large frequency spacing between the useful mode and further vibration modes of the system, at least one further spring element is provided in the inner region of the seismic mass. The further spring element the is fastened to a further anchor point of the micromechanical system. A method builds a micromechanical system with a system that can vibrate.

Abstract: A method for monitoring a wind turbine is provided. The method includes defining at least one subsystem of the wind turbine and providing a simulation model for the at least one subsystem. During normal operation of the wind turbine at least an input parameter of the at least one subsystem is determined A behavior of the at least one subsystem is simulated using the at least one input parameter as an input of the simulation model. Based on the simulated behavior, it is determined, if the at least one subsystem operates within a given specification.

Abstract: Modeling a complete tooth of a patient to facilitate dental and/or orthodontic treatment includes generating a first set of digital data representing a clinical crown; generating a second set of digital data representing a plurality of digital tooth models of a particular tooth type each having a first parameterization; processing the second set of digital data to obtain a third set of digital data representing an average tooth model of the particular tooth type having a second parameterization which is less than the first parameterization; fitting the third set of digital data to the first set of digital data to create a set of digital data representing an interim tooth model; and morphing the set of digital data representing the interim tooth model to substantially mimic the anatomical shape of the clinical crown of the first set of digital data.

Abstract: A method for manufacturing a belt for a continuously variable transmission (CVT) in which multiple V blocks of a plurality of types having different thicknesses are attached to an endless body. The method includes forming a plurality of V block groups respectively having a different ratio of different types of V blocks; and forming a series of V blocks by attaching a plurality of V blocks to the endless belt to provide said plurality of V block groups. The V block groups have different ratios of the plurality of types of V blocks to provide a belt whose noise level is low and dispersed.

Abstract: A simulator apparatus simulates a behavior of an image forming apparatus in order to verify the behavior. The simulator apparatus includes a computing unit that performs a simulation operation on the behavior of the image forming apparatus, and a selection unit that selects a simulation speed of the computing unit.

Abstract: Apparatus to exercise electrical motor drivers by electrically simulating a geared electric or electrical motor by providing an electronic load for the power signals that are applied to it. Current levels in the load are monitored in real-time using gate array logic and digital signal processing (DSP) algorithms to determine torque, acceleration, velocity and/or position data of the motor and gear train. Motor and gear train positional signals are generated and fed back to the motor driver device to close the servo loop. Control algorithms within the gate array and DSP accurately simulate the motor inertia and act to simulate a physical motor under varying load conditions. A control interface modifies critical motor parameters such as inertia, losses, gear ratio, and loading.

Abstract: A processing apparatus includes a three-dimensional shape data acquiring section, a tentative center-hole position determining section, a shape simulating section, a balance deciding section, and a center-hole deciding section. The tentative center-hole position determining section is configured to determine a tentative position of the center holes based on the three-dimensional shape data. The shape simulating section is configured to obtain a simulated shape of the material crankshaft after a working is simulated for the material crankshaft based on the tentative position of the center holes as a reference. The balance deciding section is configured to decide whether a rotational imbalance amount in the simulated shape is within a predetermined allowable range. The center-hole deciding section is configured to decide the tentative position as an actual boring position of the center holes when the rotational imbalance amount is within the predetermined allowable range.

Abstract: Methods and apparatus, including computer program products, for identifying an analytical representation of a plurality of physical elements in a computer aided design (CAD) model, the analytical representation comprising a plurality of analytical elements. one or more of the plurality of analytical elements corresponds to one or more of the plurality physical elements. An association is identified between corresponding analytical and physical elements such that a modification to one element can be applied to modify a corresponding other. An error is automatically detected in the analytical representation.

Abstract: A distributed simulation system is composed of simulator stations linked over a network that each renders real-time video imagery for its user from scene data stored in its data storage. The simulation stations are each connected with a physics farm that manages the virtual objects in the shared virtual environment based on their physical attribute data using physics engines, including an engine at each simulation station. The physics engines of the physics farm are assigned virtual objects so as to reduce the effects of latency, to ensure fair fight requirements of the system, and, where the simulation is of a vehicle, to accurately model the ownship of the user at the station. A synchronizer system is also provided that allows for action of simulated entities relying on localized closed loop controls to cause the entities to meet specific goal points at specified system time points.

Abstract: A model creation portion having a obstacle in a space includes two creation portions, one is to separate them and another is to combine them which handles, as porous media, an obstacle in which narrow spaces are regularly arranged. A thermosets flow analysis portion includes two analysis portions to separate and combine them, each of them has a viscosity equation for thermosets. The space/obstacle separation analysis portion analyzes by combining the viscosity equation with conservation equations of mass, momentum and energy, and the space/obstacle combination analysis portion analyzes by combining the viscosity equation with a conservation equation directed to a shape simplified as porous media. Resin flow behavior is analyzed while data in an interface between two models is delivered to each other, to accurately predict filling behavior at the time of injecting resin of thermosets molded articles having the complex obstacles.

Abstract: An area in which a model of a soft medium is moved is divided into a plurality of elements. In response to an update of simulation time, parameters about the model of the soft medium are shifted to elements at a position to which the soft medium is to be conveyed. After the parameters are shifted, the shape of the model of the soft medium is calculated. The elements need not be redivided by shifting the parameters to the elements at the position, to which the soft medium is to be conveyed.

Abstract: An elastic sheet is defined in accordance with a user input operation to have a shape with which the elastic sheet does not cross another member (building component) (step S1). Then, the elastic sheet is divided into rigid elements (step S2). Angles formed by each rigid element with adjacent rigid elements on two sides are calculated, and the calculation results and the like are stored in a RAM (step S3). A flexible medium which moves through a conveyance path is defined (step S4). Conveyance conditions when the flexible medium moves through the conveyance path are set (step S5). After that, the motion is calculated (step S6). The result of the motion calculation, that is, the behavior of the flexible medium, is displayed on a display device (step S7).

Abstract: A method for performing diagnostics for an engine comprises the steps of identifying an engine component as potentially being related to operational data of an engine, calculating a deviation from a thermodynamic model, and comparing the deviation with root cause deviation measures. The deviation relates the engine component to an adjustment to the thermodynamic model with respect to a variable of the thermodynamic model, based at least in part on the operational data. Each root cause deviation measure relates one of a plurality of potential root causes to the thermodynamic model with respect to the variable of the thermodynamic model.