Design Of Test Bench Research Articles

Design of a versatile diagnostic test bench of an electric vehicle’s powertrain for educational purpose using a Model-based system engineering

With the rapid development of the sustained economy, the sales of electric vehicles are increasingly pressing, and today the maintenance has severely impeded the marketing and usage of electric vehicles. The maintenance procedure for electric vehicles is considered a critical process, tell its affect the security and availability directly with the passengers. Many of research efforts are still devoted to develop and innovate on electric traction systems diagnostic and prognostic. Furthermore, in high-quality education, especially engineering education, topics concerning the vital and actual concerns should comprise more than theoretical knowledge, in purpose to close the relationship between the present technology and the student’s environment and provides hands-on engineering experience and training of general engineering skills, in order to avoid non-standard, unskilled maintenance work. The paper presents a first step towards designing a test bench of a fully electric vehicle’s Powertrain used for research and educational purposes using model-based systems engineering (MBSE) and systems modelling language (SysML) thorough the CESAM architecting and modelling framework. As the first step of the system’s design, an operational perspective layout of the diagnostic and prognostic’s test bench is built and presented using this technique.

Design and Analysis of a Novel HVDC Circuit Breaker Test Bench Based on an H-Bridge Cell MMCC

This paper proposes a novel circuit configuration for a high-voltage direct-current circuit breaker (HVDCCB) test bench that differs significantly from conventional test benches. The proposed test bench consists of a modular multilevel cascaded converter (MMCC) that is based on H-bridge cells, an output inductor, and an auxiliary capacitor bank. The proposed test bench is capable of generating controllable output currents up to several kiloamperes and output voltages up to several hundred kilovolts because each MMCC cell is operated by phase-shifted pulse-width-modulated (PSPWM) signals. Consequently, the proposed test bench can simulate a wide range of fault conditions within hardware limitations to test different HVDCCB types with various current and voltage ratings. The flexibility of the proposed test bench is complemented by a longer service lifetime with inherent circuit protection in the case of operational failure of the HVDCCB. The concept of the proposed test bench is verified experimentally on a downscaled test bench that consists of nine H-bridge cells and operates at an equivalent switching frequency of 92.5 kHz.

Test-Bench for the Characterization of Flexion Sensors Used in Biomechanics

The design, prototyping and validation of an innovative test bench for the characterization and the hysteresis measurement of flexion sensors are presented in this paper. The device, especially designed to test sensors employed in the biomedical field, can be effectively used to characterize also sensors intended for other applications, such as wearable devices. Flexion sensors are widely adopted in devices for biomedical purposes and in this context are commonly used in two main ways: to measure movements (i) with fixed radius of curvature and (ii) with variable radius of curvature. The test bench has been conceived and designed with reference to both of these needs of use. The technological choices have been oriented towards simplicity of manufacture and assembly, configuration flexibility and low cost of realization. For this purpose, 3D printing technology was chosen for most of the structural components of the device. To verify the test bench performances, a test campaign was carried out on five commercial bending sensors. To characterize each sensor, the acquired measurements were analysed by assessing repeatability and linearity of the sensors and hysteresis of the system sensor/test bench. A statistical analysis was performed to study the positioning repeatability and the hysteresis of the device. The results demonstrate good repeatability and low hysteresis.

Design of a column test bench for the evaluation of alternative absorbent materials in wastewater treatment

One of the most used processes for wastewater treatment is filtration, still having unknowns related to the new possible absorbent materials which can provide better pollutant removal. This project proposes a column test bench capable of working with different materials, particle diameters (> 0.35mm) and densities and densities with three columns of 1.5 m length and 4 inches of diameter.. To perform this project, the type of reactive material for the filter medium was identified, considering the nominal and critical size of the fine sand (0.35m), as a basis for determining the design of the length, diameter of the and thickness column. The design conditions were taken so that the hydraulic system can function as a slow and rapid filter. The most critical operating conditions were selected, Qmax: 16.72 lpm and Filtration Rate: 19.80 m / h. Under these operating conditions, a hydraulic head loss of 2.77 m was obtained within the sand column. The result of this research is the design of a column test system that can work under different hydraulics conditions and absorbent materials with sizes greater than 0.35 mm, intended for the investigation of wastewater treatment from car washers and the removal of heavy metals. The final cost of building the column test is about 25% of the commercial price system.

Study on dynamic characteristics of bearing-rotor system under ship sway condition

On condition that pans and tilts, ship bearing rotor system stability and security, as the change of ship swaying amplitude have influence, based on independent research and development of guangzhou maritime college design of vertical and horizontal swing test bench, simulate the real working condition of ships at sea, in the performance of bearing rotor system under rolling condition were studied. LMS_TEST. LAB modal tester software was used to analyze the dynamic characteristics and collect the experimental data of the bearing rotor system for analysis and research. In this paper, the influence of period and amplitude on the dynamic characteristics of the bearing-rotor system and the influence on the axis trajectory of the bearing-rotor system under different working conditions are analyzed mainly under the rolling condition.

Вопросы синтеза и практической оценки погрешности компенсационного режима двухкомпонентного гироскопа

The paper introduces the results of studying the characteristics of various dynamically tuned gyroscopes operating in the mode of a variable rate sensor. Within the study, we determined the dependence of the dynamic error of the rate sensor on the amplitude and frequency of angular oscillations of the gyroscope body. We analyzed the methodological and hardware support for evaluating the dynamic error of a dynamically tuned gyroscope — the rate sensor in order to reduce its influence on the operational characteristics of the device. To experimentally research and practically evaluate the dynamic error of the dynamically tuned gyroscope — the rate sensor, we proposed a design of the rotary vibration test bench, developed requirements for it, and calculated its elastic-mass characteristics.

Modal analysis and analysis of motor support based on workbench test bench design of motor dynamic shock absorber

This article takes the test bench support (hereinafter referred to as the support) as the research object, analyzes its natural frequency, establishes a three-dimensional model of the support through creo, and uses ansys workbench for modal analysis. The motor is an adjustable-speed motor with a maximum speed of 20000r/s and is fixed on the bracket. The rotation excitation frequency of the motor and the natural frequency of the bracket will form resonance in the first 10 steps, so a damping shock absorber is designed to transfer the vibration on the motor to the vibration reduction device, so as to achieve the purpose of eliminating vibration.

Quadcopters Testing Platform for Educational Environments.

This work focuses on the design and construction of an experimental test bench of three degrees of freedom with application in educational environments. It is constituted by a gyroscopic structure that allows the movements of a quadcopter to analyze the control systems. In this context, the main features of the mechanical and electronic design of this prototype are described. At the same time, the main characteristics with respect to existing platforms are highlighted in aspects such as: system autonomy, cost, safety level, operation ranges, experimental flexibility, among others. The possible controller design approaches for quadcopter stabilization can extend to many basic and advanced techniques. In this work, to show the operation and didactic use of the platform, the development of the controller for tilt angle stabilization under two different approaches are presented. The first approach is through PID control, oriented for undergraduate students with basic level in control theory. The second approach is by means of State Feedback, oriented to students with more advanced level in this field. The result of this work is an open test bench, enabled for the experimentation of control algorithms using Matlab-Simulink.

Fast and efficient FPGA implementation of Polar Codes and SoC test bench

In this paper we describe a novel and efficient System on Chip Field Programmable Gate Array (SoC FPGA) implementation and test bench for short Polar Codes on an Intel DE10-Standard Development Kit. Encoder and decoder are synthesized on the FPGA fabric and the whole functionality of a complete test bench is developed with an embedded ARM-based hard processor system. A Very High Speed Integrated Circuit (VHSIC) Hardware Description Language (VHDL) parametric design allows synthesis for different code lengths and is suitable for rate-adaptive decoding schemes. We implement fully-unrolled encoder and decoder architectures to achieve high troughputs and lower energy requirements, and achieve an 11% higher throughput than a reference implementation, for short Polar Codes. A novel Merged Processing Element (MPE) is optimized to be used with Sign–Magnitude LLR (SM LLR) discrete representations and pre-computing results in the decoder to reduce latency and resource consumption in comparison to reference designs. A simplified version of this MPE is also implemented, trading higher latencies for lower resource requirements. The SoC test bench design allows single-board automated testing and is also suitable for other error-correcting schemes. Error-correcting performance is evaluated for different combinations of integer and decimal part bits in LLR quantified representations. Also a new simplified non-statistical LLR metric was tested with promising results.

Research on similar test device of deep roadway impact

With the continuous increase of coal mining depth, the impact of ground pressure disaster is showing more and more serious development trend, which poses a great threat to the safety production of coal mine and the life safety of miners. The design and construction of similar test bench for deep tunnel excavation has become one of the difficult problems of scholars at home and abroad When the impact of high altitude falling hammer on the tunnel is tested, the drop hammer hits the pressure column and will be bounced, causing two shocks and affecting the experimental results. Based on the disaster mechanism of roadway rock burst, and simulating the damage caused by the immediate release of rock burst, we designed a test system that can fall smoothly when the falling hammer falls, and it will be held when the falling hammer starts to fall again. The device prevents the second impact of the falling hammer in the impact test of the roadway, and realizes the dynamic loading of the roadway.

The design and application of a pneumatic suspension test bench

The suspension is one of the most important parts of a motorcycle. The main function of a suspension is to connect the frame with the wheels. During its operation different forces and torques affect this unit. It is important to analyse the behaviour of the suspension during its use. The subject of the article is to present the design and application possibilities of a device suitable for testing the rear suspension of motorcycles. With this equipment it is possible to analyse the rear suspension of motorcycles. During its operation, the test bench moves an artificial obstacle under the wheel. As a result, the equipment simulates the motorcycle’s passing through uneven road surfaces. This way we can analyse a rear suspension of a motorcycle or a suspension fixed to a test frame.

Concept Design of Automatic Transmission Test Bench for a Passenger Car

Concept Design of Automatic Transmission Test Bench for a Passenger Car

Durability Test Bench Design for Electric Lock of Sliding Door

With the rapid development of automobile industry, electric door locks have widely used in various vehicle doors, especially for sliding doors. Among all performances, durability performance for electric locks is virtual for safety, so miniaturized durability test bench has been designed in the research according to the national standard of electric lock. Firstly, four-bar linkage mechanism has been adopted as the main actuator for the motion track achievement, the real motion track of sliding door can be guaranteed through the verification of ADAMS simulation. Secondly, the compression test has been carried out to calculate the reaction force of door sealing strips, thus the resistance device of test bench for simulating reliable locking process of electric lock has been designed. The miniaturized durability test bench can replace the existing durability test method which only performed by the whole vehicle testing, thus providing a low-cost and reliable test device for relevant manufacturers.

Design, Analysis and Application of Single-Wheel Test Bench for All-Electric Antilock Braking System in Electric Vehicles

An antilock braking system (ABS) is one of the most important components in a road vehicle, which provides active protection during braking, to prevent the wheels from locking-up and achieve handling stability and steerability. The all-electric ABS without any hydraulic components is a potential candidate for electric vehicles. To demonstrate and examine the all-electric ABS algorithms, this article proposes a single-wheel all-electric ABS test bench, which mainly includes the vehicle wheel, the roller, the flywheels, and the electromechanical brake. To simulate dynamic operation of a real vehicle’s wheel, the kinetic energy of the total rotary components in the bench is designed to match the quarter of the one of a commercial car. The vertical force to the wheel is adjustable. The tire-roller contact simulates the real tire-road contact. The roller’s circumferential velocity represents the longitudinal vehicle velocity. The design and analysis of the proposed bench are described in detail. For the developed prototype, the rated clamping force of the electromechanical brake is 11 kN, the maximum vertical force to the wheel reaches 300 kg, and the maximum roller (vehicle) velocity reaches 100 km/h. The measurable bandwidth of the wheel speed is 4 Hz–2 kHz and the motor speed is 2.5 Hz–50 kHz. The measured results including the roller (vehicle) velocity, the wheel velocity, and the wheel slip are satisfactory. This article offers the effective tools to verify all-electric ABS algorithms in a laboratory, hence saving time and cost for the subsequent test on a real road.

Design and research of hydraulic screed test bench

In order to meet the requirements of the performance test of the screed, a hydraulic test bench for screed is designed, which realizes the action of the screed. On this basis, the test bench measurement and control software based on LabVIEW is developed, it completes the tests and data analysis of screed. The test results show that the system has perfect functions and meets the requirements of screed test.

Design and construction of an experimental test bench for the study of a mechanical system used for coupling power sources

This study investigates the experimental test bench specially created fortestingaplanetary mechanism with two degrees of freedom in the configuration of hybrid electric vehicle powertrain. For the experimental study, it was necessary to build a test bench that consists of a metal frame on which other mechanical and electrical components are positioned: the mechanical coupling system, the thermal engine, a three-phase electric motor and an alternator. The test bench can simulate road load, during which time it is measured with the help ofa torque sensor the mechanical moment developed by the electric motor used in this configuration.

Design of an Experimental Test Bench to Obtain I-V Curve and to Track Maximum Power Point of PV Modules under Different Conditions

Yakın tarihte artan sanayileşmeyle beraber enerjiye olan ihtiyaç artmıştır. Konvansiyonel enerji ham maddelerinin azalması ve çevreye olan kötü etkilerinin artmasından dolayı yenilenebilir enerji kaynaklarının önemi artmıştır. Günümüzde güneş enerjisi yenilenebilir enerji kaynakları arasında en çok bilinen ve tercih edilenlerden biridir. Güneş enerjisini elektrik enerjisine dönüştürmek için fotovoltaik (PV) güneş panelleri kullanılmaktadır. Bir PV hücrenin elektriksel karakteristiği genellikle akım-gerilim (I-V) eğrisi ile temsil edilir. Bu eğri ışınım, sıcaklı vb. dış ortam değişkenlerine bağlı olarak değişkenlik göstermektedir. Dış ortam değişkenlerine bağlı olarak PV güç-gerilim (P-V) eğrisi üzerinde maksimum güç noktası takibi (MPPT) yöntemleri ile yapılmaktadır. Bu çalışmada, PV panellerin I-V ve P-V eğrilerinin çıkartılıp bir ekranda gösterilmesi ve maksimum güç takibi yapan devre tasarlanmıştır. MPPT için Sars&Gözlemle (P&O) algoritması kullanılmıştır. MPPT devresinde yükseltici dc-dc dönüştürücü tercih edilmiştir. Sensörler yardımıyla panelden elde edilen akım ve gerilim değerleri, kontrol kartına aktarılarak değerlendirilmiş ve yükseltici tip dönüştürücüdeki anahtarlama elemanı için anahtarlama sinyallerinin üretimi gerçekleştirilmiştir. Böylece PV panelin o anki verebileceği maksimum güç elde edilmiştir. Ayrıca farklı durumlar altında elde edilen akım gerilim değerleri bilgisayar ortamına aktarılmıştır.

Design of a High Performance Hydraulic Valve Comprehensive Test Bench

Design of a High Performance Hydraulic Valve Comprehensive Test Bench

FP-TES: A Fluidisation-Based Particle Thermal Energy Storage, Part I: Numerical Investigations and Bulk Heat Conductivity

Renewables should become more continuously available, reliable and cost-efficient to manage the challenges caused by the energy transition. Thus, analytic and numerical investigations for the layout of a pilot plant of a concept called Fluidisation-Based Particle Thermal Energy Storage (FP-TES)—a highly flexible, short- to long-term fluidised bed regenerative heat storage utilising a pressure gradient for hot powder transport, and thus enabling minimal losses, high energy densities, compact construction and countercurrent heat exchange—are presented in this article. Such devices in decentralised set-up—being included in energy- and especially heat-intensive industries, storing latent or sensible heat or power-to-heat to minimise losses and compensate fluctuations—can help to achieve the above-stated goals. Part I of this article is focused on geometrical and fluidic design via numerical investigations utilising Computational Particle Fluid Dynamics (CPFD). In the process a controlled transient simulation method called co-simulation of FP-TES is developed forming the basis for test bench design and execution of further co-simulation. Within this process an advanced design of rotational symmetric hoppers with additional baffles in the heat exchanger (HEX) and internal pipes to stabilise the particle mass flow is developed. Moreover, a contribution bulk heat conductivity is presented to demonstrate low thermal losses and limited needs for thermal insulation by taking into account the thermal insulation of the outer layer of the hopper.

Design and Construction of a Low-Cost Test Bench for Testing Agricultural Spray Nozzles

Droplet size distribution is probably the most important feature of a spray as it affects all aspects of a phytosanitary treatment, i.e., biological, environmental, and safety aspects. This study describes a low-cost laboratory test bench able to analyze agricultural spray nozzles under realistic conditions. The design of the equipment was mainly based on the ISO 5682-1 standard. It has a couple of 3 m long rails, along which the nozzle under test moves while spraying, controlled by a closed-loop position and speed controller. The drops were captured with three Petri dishes containing silicone oil, photographed by means of a digital single-lens reflex (DSLR) camera, and then analyzed with the ImageJ software in order to measure the usual spray parameters: the volumetric diameters, the Sauter mean diameter, and the number mean diameter. Spray trials and tuning of the system parameters were managed by means of a purposely designed user interface running on a Windows 10 PC. Some tests were carried out by using an Albuz ATR80 orange hollow cone nozzle at the working pressures of 0.3, 0.5, 1.0, and 1.5 MPa. The results about spray quality agree with the factory information, and the whole system, even if some aspects still need improvements, has proven reliable.