Universal Testing Platform Research Articles

A novel method for identifying rock interfaces and fragmentation zones based on drilling response characteristics

The rapid measurement and acquisition of the fracture characteristics and strength of the surrounding rock are crucial for evaluating the stability of underground engineering. In this study, a laboratory/coal mine universal drilling test platform was developed to enable real-time measurement of drilling parameters. The testing results demonstrate that under identical rotation speed conditions, both thrust force and torque increase exponentially with increasing drilling speed, while under identical drilling speed conditions, both thrust force and torque decrease linearly with increasing rotation speed. In intact rock layers, variations in torque, thrust force, and drilling speed with depth remain relatively stable, in rock layer interfaces and fragmentation zones, sudden changes occur within a drill displacement range of approximately 3–7 mm, which become more pronounced as strength differences between adjacent rock layers increase.Based on the cutting mechanics model of drill bit, the evaluation index of drilling energy consumption of unit rock mass (Eη) is derived. Subsequently, based on drilling speed, rotation speed, thrust force, torque and energy index, a machine learning model for predicting rock strength is established using the LS-SVM nonlinear regression approach. Field practice has shown that drilling platform can effectively identify both the rock interface and range of fragmentation areas. The experimental results are of great value to the selection of supporting types in the process of coal mine roadway excavation.

Development of Universal Test Platform of Missile Launch and Control System

This paper proposes a novel hardware and software platform for missile launch and control system based on custom Ethernet bus + modular unit + synchronous clock. It consists of power unit, main control unit, MIL1553B/ARINC429 interface simulation unit, CAN/Flexray interface simulation unit, universal serial interface simulation unit, I/O interface simulation unit, video unit, stabilized voltage supply unit, chassis and other parts. Each unit adopts the modular daisy chain communication, and, through modularization of each unit, realizes the testing of maintenance objects and the expansion of new equipment testing resources in the future. Real-life application shows that the proposed hardware and software platform is reliable and effective.

Calibration procedure and biomechanical validation of an universal six degree-of-freedom robotic system for hip joint testing

PurposeAmong various test methods for different human joints, the use of robot systems has attracted major interest and inherits the potential to become a gold standard in biomechanical testing in the future. A key issue associated with those robot-based platforms is the accurate definition of parameters, e.g., tool center point (TCP), length of tool or anatomical trajectories of movements. These must be precisely correlated to the physiological parameters of the examined joint and its corresponding bones. Exemplified for the human hip joint, we are creating an accurate calibration procedure for a universal testing platform by using a six degree-of-freedom (6 DOF) robot and optical tracking system for recognition of anatomical movements of the bone samples.MethodsA six degree-of-freedom robot (TX 200, Stäubli) has been installed and configured. The physiological range of motion of the hip joint composed of a femur and a hemipelvis was recorded with an optical 3D movement and deformation analysis system (ARAMIS, GOM GmbH). The recorded measurements were processed by automatic transformation procedure (created in Delphi software) and evaluated in 3D CAD system.ResultsThe physiological ranges of motion were reproduced for all degrees of freedom with the six degree-of-freedom robot in adequate accuracy. With the establishment of a special calibration procedure by using a combination of different coordinate systems, we were able to achieve a standard deviation of the TCP depending of the axis between 0.3 and 0.9 mm and for the length of tool between + 0.67 and − 0.40 mm (3D CAD processing) resp. + 0.72 mm to − 0.13 mm (Delphi transformation). The accuracy between the manual and robotic movement of the hip shows an average deviation between − 0.36 and + 3.44 mm for the points on the movement trajectories.ConclusionA six degree-of-freedom robot is appropriate to reproduce the physiological range of motion of the hip joint. The described calibration procedure is universal and can be used for hip joint biomechanical tests allowing to apply clinically relevant forces and investigate testing stability of reconstructive osteosynthesis implant/endoprosthetic fixations, regardless of the length of the femur, size of the femoral head and acetabulum or whether the entire pelvis or only the hemipelvis will be used.

The universal test platform based on unmanned aerial vehicle for scientific research

To verify the results of scientific research as well as the characteristics of new and upgraded aerial vehicle onboard equipment in the Air Force Scientific Center (AFSC) the universal test platform (UTP) based on unmanned aerial vehicle (UAV) A-4C “Albatross” was developed. It is shown how the payload control system developed by the AFSC specialists ensures the interaction of the ground control station (GCS) and the onboard control system with the equipment under test (EUT). The article considers the tasks to be solved by the UTP, the main technical requirements for the UTP, the features of the technical implementation of the UTP and the stages of its flight tests.

Developing Autonomous Driving Solutions with a Universal Test Platform

Developing Autonomous Driving Solutions with a Universal Test Platform

KHARKIV TEST PLATFORM FOR RESEARCH AND DEVELOPMENT OF Si SPECTROMETRIC PLANAR DETECTORS AND DETECTORS ARRAYS FOR MEDICAL APPLICATION

A universal test platform for research and development of planar radiation detectors for use in medicine has been created having the possibility of obtaining complete information about the characteristics of the detector before creating a detecting module with specialized electronics. 5 jobs were created with the ability to perform the following work: measurement of the electrophysical characteristics of individual detectors and selected detection elements of the matrices based on the station with manual movement of microprobes; determination of the yield of suitable detector elements of matrices using a test station with automated microprobe movement and automated collection and processing of electrophysical measurement data; measurement of the energy resolution (ER) of individual silicon detectors, “scintillator-silicon photosensor” type detectors and measurement of the ER of selected matrix elements before creating a detection module with specialized electronics.

Superconductivity and hall effect of polycrystalline Pb82Bi18 thin films, a universal test platform for flux pinning by hybrid nanostructures

We report the properties of superconductivity and Hall effect in 100 nm Pb[Formula: see text]Bi[Formula: see text] alloy thin films which were prepared by thermal evaporation with quench condensation using liquid nitrogen. X-ray diffraction indicates the films are [Formula: see text]-phase with peaks shifted to lower angles compared to pure Pb. The [Formula: see text] of the films was higher than those of an amorphous Pb–Bi alloy thin film of the same composition and pure bulk Pb. The resistivity, critical field and critical current density of the thin films are reported. The coherence length ([Formula: see text][Formula: see text]) and London penetration depth ([Formula: see text]) near [Formula: see text] were calculated from the experimental results. The films are in the dirty limit and behave as type-II superconductors with a Ginzburg–Landau parameter of about 10. Additionally, the films show sign reversal in Hall measurements. These films have been quite useful in a comprehensive study of the effects of flux pinning by integrated ferromagnetic nanostructures conducted in hybrid ferromagnet–superconductor samples in our lab over the past few years due to their single-phase nature and strong type-II behavior.

Design of standardized universal simulation test platform for onboard solid state memory controllers

Design of standardized universal simulation test platform for onboard solid state memory controllers

The evaluation of extensional viscosity of highly filled polyolefins composites films with calcium carbonate

This article reports the results of the extensional viscosity ( ) of polyolefins composites films. The test material was composed of ternary MDPE/iPP/CaCO3 composites with a calcium carbonate content of 48–72% by mass. The concentrations of the composites and reference materials that were PE‐MD/iPP mixtures are summarized in Table 1. For all materials the viscosity curves (rotational rheometer) and the change in mass flow rate were determined. Two types of investigated films were produced: cast films and blow films. The extensional viscosity of films (thickness ≈ 80 μm) was performed on a SER‐2 Universal Testing Platform. The influence of the addition of calcium carbonate, extrusion techniques and the direction of sample cut (MD and TD) to change the extensional viscosity were discussed. The extensional viscosity measurements ( ) were taken at a temperature of 140°C and for a strain rate (Hencky strain rate) of = 0.1, 0.2 and 0.5 s−1. POLYM. ENG. SCI., 59:E155–E163, 2019. © 2018 Society of Plastics Engineers

Implementing and Quantifying the Shape-Memory Effect of Single Polymeric Micro/Nanowires with an Atomic Force Microscope.

The implementation of shape-memory effects (SME) in polymeric micro- or nano-objects currently relies on the application of indirect macroscopic manipulation techniques, for example, stretchable molds or phantoms, to ensembles of small objects. Here, we introduce a method capable of the controlled manipulation and SME quantification of individual micro- and nano-objects in analogy to macroscopic thermomechanical test procedures. An atomic force microscope was utilized to address individual electro-spun poly(ether urethane) (PEU) micro- or nanowires freely suspended between two micropillars on a micro-structured silicon substrate. In this way, programming strains of 10±1% or 21±1% were realized, which could be successfully fixed. An almost complete restoration of the original free-suspended shape during heating confirmed the excellent shape-memory performance of the PEU wires. Apparent recovery stresses of σmax,app =1.2±0.1 and 33.3±0.1 MPa were obtained for a single microwire and nanowire, respectively. The universal AFM test platform described here enables the implementation and quantification of a thermomechanically induced function for individual polymeric micro- and nanosystems.

Visualization of Elongation Measurements Using an Ser Universal Testing Platform

Visualization of Elongation Measurements Using an Ser Universal Testing Platform

Design and Realization of Universal Integrated Testing Platform for Equipment-Embedded Software

An universal testing platform for equipment-embedded software is designed and realized to support the dynamic verification test of embedded software on CI level and system level. This Platform, based on LAN and USB bus architecture, has provided the function of system interface modelling, test project management, test case script code, test result control and analysis, and test report generation, and is available for real time, closed-loop and non-invasive dynamic testing on the embedded software with the characteristic of portability, easy operation, flexibility in size configuration and universality of protocol description.

Numerical characterization and experimental verification of an in-plane MEMS-actuator with thin-film aluminum heater

In this paper, a novel concept of a thermo-mechanical MEMS actuator using aluminum thin-film heaters on a thermal oxide for electrical insulation is presented. The actuator is part of an universal tensile testing platform for thermo-mechanical material characterization of one dimensional materials on a micro- and nano-scopic scale under different environmental conditions, as varying temperatures, pressure, moisture or even vacuum and is realised in BDRIE technology. It is shown, that the actuator concept fulfills the requirements for the use in a tensile loading stage along with heterogeneously integrated nanofunctional elements, following a specimen centered approach in line with bottom-up self-assembly processes. Simulation and experiment agree very well in the thermal and mechanical domain and allow subsequent optimisation of the actuator performance.

Effect of Densification Conditions on Physical Quality of Densified Sorghum Straw Briquette Fuel

An experiment was conducted on densification processing of sorghum straw stalks with self-made steel molds on a hydraulic universal test platform. The influences of different densification conditions on physical quality of briquette fuel are investigated, including pressures, temperatures, moisture contents and straw preheating method. Moreover, the relationship between molding temperature and inner stress decreasing rate of straw briquette at holding pressure stage is also analyzed. The result shows that the suitable value of moisture content, temperature and molding pressure for straw compression process is 20%, 90°C and at least 50MPa, respectively. The phenomenon of uneven temperature distribution in straw briquette keeps in existence even in the case of microwave preheating. However, in contrast with the very low central temperature in straw briquette when preheating by electric heater wire, the phenomenon of local overheating caused by microwave preheating may be helpful to straw molding process.

The Design and Implementation of Hexa-Rotor Aerial Robot

Today, when the robot technology is booming, various sensors and intelligent functions that applied in robots can be transferred and applied to the unmanned aerial robot. It will make the unmanned aerial robot not an ordinary UAV any longer, but an intelligent robot that can fly. Conventional UAVs are not well suited for use in confined spaces, such as small passageways or indoor halls, e.t.c. The multi-rotor copters have the vertical take-off and landing (VTOL) ability for indoor flight. The most popular research topics for multi-rotor copters are Quad- copter and Hexa-copter. The objective of this research is to design and build a hexa-rotor aerial robot. We used AVR microcontroller as the flight control system, and use three-axis gyroscope and three-axis accelerometer for attitude sensing of the aerial robot; the flight altitude is estimated with barometric altimeter; the closed loop control of the aerial robot is carried out with PID control to meet the requirements, such as self-balancing, hovering and etc. Multi-sensors had been applied to the hexa-rotor aerial robot, and verified the feasibility with experiments. A universal test platform was designed to test the stability and balance of the Hexa-rotor aerial robot. An external force was applied on the aerial robot from pitch, roll and yaw direction, the aerial robot can return to self-balancing flight quickly. Finally, the hexa-rotor aerial robot can make a stable hovering during the outdoor test fly.

Effect of a chain extender on the rheological and mechanical properties of biodegradable poly(lactic acid)/poly[(butylene succinate)‐co‐adipate] blends

AbstractBiodegradable polymer blends based on poly(lactic acid) (PLA) and poly[(butylene succinate)‐co‐adipate] (PBSA) were prepared with a laboratory internal mixer. An epoxy‐based, multifunctional chain extender was used to enhance the melt strength of the blends. The morphology of the blends was observed with field emission scanning electron microscopy. The elongational viscosities of the blends, with and without chain extender, were measured with a Sentmanat extensional rheometer universal testing platform. The blends with chain extender exhibited strong strain‐hardening behavior, whereas the blends without chain extender exhibited only weak strain‐hardening behavior. Measurements of the linear viscoelastic properties of the melts suggested that the chain extender promoted the development of chain branching. The results show that PBSA contributed to significant improvements in the ductility of the PLA/PBSA blends, whereas the chain extender did not have a significant effect on the elastic modulus and strain at break of the blends. The combined blending of PLA with PBSA and the incorporation of the chain extender imparted both ductility and melt strength to the system. Thus, such an approach yields a system with enhanced performance and processability. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Design of Software of the Universal Test Platform for Airborne Guidance Weapon Based on PAWS

After introducing the research background of the universal test platform for airborne guidance weapon, the paper puts forward its hardware architecture which is built based on multi-bus fusion. The main functions of its software are described and its software architecture is proposed. To realize the transportability and inter-operation ability of TPS, its software is developed with the method of signal-oriented using the test language-ATLAS and is compiled and run on PAWS. The software of VC++、Lab Windows/CVI and so on are adopted to develop interface and instrument drive of the system. The software development process with PAWS is also introduced. Its software is expansible and when the test platform adds a new airborne guidance weapon which needs to be tested, only adaptor database Ita.ITA and TPS database need to be developed.

A Uniaxial Tensile Method and its Device Design Scheme Based on Single Rotary Drum Applied for Polymer Films

According to the Sentmanat Extensional Rheometer (SER) and its Universal Testing Platform, a uniaxial tensile method and its device design scheme based on single rotary drum applied for polymer films is proposed in the paper, which will be used to characterize mechanical properties of various types of plastic films under wider temperatures and constant Hencky strain rates. Basic principal and device design ideas are discussed with formula derivation and figures, which provides references to develop the related fixture and carry out some relevant experiments for future.

An Induction Machine Emulator for High-Power Applications Utilizing Advanced Simulation Tools With Graphical User Interfaces

In this paper, a method is presented for removing the risk associated with the testing and development of novel drive system topologies, prototype electrical machines, advanced control system strategies, or a combination of the aforementioned without using any real motors/generators. The test platforms for low-power machines are relatively inexpensive and accessible; however, as power levels increase into the upper kilowatt and megawatt range, validation of prototype machines and drives becomes costly. The proposed induction machine emulator (IME) platform utilizes the power hardware-in-the-loop concept in conjunction with a high-fidelity machine model and load dynamics. The electrical machine and its load dynamics are simulated with a real-time digital simulator, which generates appropriate control commands to a power electronics-based voltage amplifier that interfaces to a variable speed drive (VSD). Specifically, the current draw is recreated by altering the phase and magnitude of a voltage amplifier connected to a VSD under test via a unique transformer-based LCL-type coupling network. Based on the proposed concept, the use of a multiwinding, tap-changing transformer establishes a truly versatile and universal test platform for a wide range of power levels. In addition, this paper presents a control strategy in the synchronously rotating reference frame in dq coordinates for the power electronic converters in IME operation. Experimental results at the 25-kVA power level validate the feasibility and highly dynamic performance of the proposed test platform.

Measurement of Elongational Viscosity of Polymer Melts Using SER Universal Testing Platform

Measurement of Elongational Viscosity of Polymer Melts Using SER Universal Testing Platform