Abstract: Disclosed is a material testing system that includes a fixture, a frame, a load sensor, a displacement sensor and a computer system coupled to the material testing system. The computer system includes one or more processors, one or more memory devices coupled to the one or more processors, one or more computer readable storage devices coupled to the one or more processors, wherein the one or more storage devices contain program code executable by the one or more processors via the one or more memory devices to implement a method for detecting a change in a material testing sequence. A computer program product that implements a method for detecting a change in a material test sequence, and methods for detecting a change in a material test sequence or fatigue test is further disclosed.

Abstract: Described are systems and methods for image recognition in test systems. A method for safe operation of a test system includes capturing image data representative of a test area of the test system with an imaging device, transmitting the image data representative of the test area from the imaging device to a processor running an image recognition application, detecting, by the image recognition application, a user presence within the test area, and adjusting the test system to a safe mode in response to the detecting the user presence within the test area.

Abstract: A linear motor including a stator assembly, an armature mechanically coupleable to a test specimen configured to be moved relative to the stator assembly by operation of the linear motor, and a suspension system configured facilitate movement of the armature relative to the stator assembly along an axis of movement without physically touching the armature during movement. Further disclosed is a multi-phase linear motor, a linear motor having an armature with an array of flat magnets, and a linear motor having a magnetic damping system.

Abstract: Described are systems and methods for fixture identification in test systems. A method for fixture identification in a test system may include capturing image data representative of a first fixture of the test system with an imaging device. The method may further include transmitting the image data representative of the first fixture from the imaging device to a processor running an image recognition application. The method may also include identifying the first fixture based on the image data with the processor running the image recognition application.

Abstract: A linear motor including a stator assembly, an armature mechanically coupleable to a test specimen configured to be moved relative to the stator assembly by operation of the linear motor, and a suspension system configured facilitate movement of the armature relative to the stator assembly along an axis of movement without physically touching the armature during movement. Further disclosed is a multi-phase linear motor, a linear motor having an armature with an array of flat magnets, and a linear motor having a magnetic damping system.

Abstract: Disclosed is a material testing system that includes an output shaft configured to be moved by operation of a motor, the output shaft coupleable to a test specimen such that movement of the output shaft imparts a mechanical force on the test specimen. The material testing system includes a haptic feedback system configured to provide an operator of the material testing system haptic feedback related to a position or state of the output shaft relative to the test specimen during setup. Methods of testing using haptic feedback are also disclosed.

Abstract: Disclosed is a material testing system that includes a fixture, a frame, a load sensor, a displacement sensor and a computer system coupled to the material testing system. The computer system includes one or more processors, one or more memory devices coupled to the one or more processors, one or more computer readable storage devices coupled to the one or more processors, wherein the one or more storage devices contain program code executable by the one or more processors via the one or more memory devices to implement a method for detecting a change in a material testing sequence. A computer program product that implements a method for detecting a change in a material test sequence, and methods for detecting a change in a material test sequence or fatigue test is further disclosed.

Abstract: An error compensation system and method may include applying a mechanical load to a reference sample to obtain a load measurement signal from the load sensor and a displacement measurement signal from the displacement sensor, calculating a transfer function to create a load filter and a displacement filter to be applied to the load measurement signal and the displacement measurement signal, respectively, applying the load filter to the load measurement signal to calculate a load compensation value, and applying the displacement filter to the displacement measurement signal to calculate a displacement compensation value, and determining the compensated value by comparing the load compensation value with the displacement compensation value, wherein the compensated value is determined prior to testing a specimen so that the compensated value is used to automatically correct a measured deflection of the specimen to arrive at an actual specimen deflection.

Abstract: Disclosed is a material testing system that includes an output shaft configured to be moved by operation of a motor, the output shaft coupleable to a test specimen such that movement of the output shaft imparts a mechanical force on the test specimen. The material testing system includes a haptic feedback system configured to provide an operator of the material testing system haptic feedback related to a position or state of the output shaft relative to the test specimen during setup. Methods of testing using haptic feedback are also disclosed.

Abstract: Described are systems and methods for fixture identification in test systems. A method for fixture identification in a test system may include capturing image data representative of a first fixture of the test system with an imaging device. The method may further include transmitting the image data representative of the first fixture from the imaging device to a processor running an image recognition application. The method may also include identifying the first fixture based on the image data with the processor running the image recognition application.

Abstract: Systems, methods, and devices are provided for testing a drug eluting prosthesis. A drug eluting prosthesis is placed within a conduit that is coupled at one end to a first conduit frame and at a second end to a second conduit frame. The first conduit frame is coupled to the second conduit frame using a movable shaft, such that the first conduit frame and the second conduit frame can move relative to each other. When the first conduit frame and the second conduit frame are moved relative to each other, they expose the conduit and the drug eluting prosthesis to compressive or tensile forces. While the drug eluting prosthesis is being exposed to compressive or tensile forces, a fluid flow is provided through the conduit to test the particle shed rate of the drug eluting prosthesis.

Abstract: A linear motor including a stator assembly, an armature mechanically coupleable to a test specimen configured to be moved relative to the stator assembly by operation of the linear motor, and a suspension system configured facilitate movement of the armature relative to the stator assembly along an axis of movement without physically touching the armature during movement. Further disclosed is a multi-phase linear motor, a linear motor having an armature with an array of flat magnets, and a linear motor having a magnetic damping system.

Abstract: An error compensation system and method may include applying a mechanical load to a reference sample to obtain a load measurement signal from the load sensor and a displacement measurement signal from the displacement sensor, calculating a transfer function to create a load filter and a displacement filter to be applied to the load measurement signal and the displacement measurement signal, respectively, applying the load filter to the load measurement signal to calculate a load compensation value, and applying the displacement filter to the displacement measurement signal to calculate a displacement compensation value, and determining the compensated value by comparing the load compensation value with the displacement compensation value, wherein the compensated value is determined prior to testing a specimen so that the compensated value is used to automatically correct a measured deflection of the specimen to arrive at an actual specimen deflection.

Abstract: This document provides systems and methods for testing of various kinds of valves. For example, this document provides systems and methods for accelerated life testing of prosthetic heart valves.

Abstract: In a mechanical test system, a method of compensating for acceleration induced load error in a load sensor in a mechanical communication with a component comprises measuring an acceleration of the component to obtain an acceleration measurement. A load sensor measures a force applied by the mechanical test system to a test sample in substantially a same direction of the acceleration to obtain a force measurement. The force measurement is modified with a transfer function that includes at least one of a gain correction and a phase correction to compensate for an error value in the force measurement attributed to movement of at least the load sensor when the force is applied to the test sample.

Abstract: This document provides systems and methods for testing of various kinds of valves. For example, this document provides systems and methods for accelerated life testing of prosthetic heart valves.

Abstract: This document provides systems and methods for testing of various kinds of valves. For example, this document provides systems and methods for accelerated life testing of prosthetic heart valves.

Abstract: Systems, methods, and devices are provided for testing a drug eluting prosthesis. A drug eluting prosthesis is placed within a conduit that is coupled at one end to a first conduit frame and at a second end to a second conduit frame. The first conduit frame is coupled to the second conduit frame using a movable shaft, such that the first conduit frame and the second conduit frame can move relative to each other. When the first conduit frame and the second conduit frame are moved relative to each other, they expose the conduit and the drug eluting prosthesis to compressive or tensile forces. While the drug eluting prosthesis is being exposed to compressive or tensile forces, a fluid flow is provided through the conduit to test the particle shed rate of the drug eluting prosthesis.

Abstract: In a mechanical test system, a method of compensating for acceleration induced load error in a load sensor in a mechanical communication with a component comprises measuring an acceleration of the component to obtain an acceleration measurement. A load sensor measures a force applied by the mechanical test system to a test sample in substantially a same direction of the acceleration to obtain a force measurement. The force measurement is modified with a transfer function that includes at least one of a gain correction and a phase correction to compensate for an error value in the force measurement attributed to movement of at least the load sensor when the force is applied to the test sample.

Abstract: A mechanical clamping device can include at least two contact faces, a first of the contact faces configured to travel in response to an applied force, each contact face configured to contact a sample when loaded into the mechanical clamping device. The device can further include a load element configured to cause the two contact faces to apply a clamping force to the sample when loaded into the mechanical clamping device.