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This paper deals with the usage of a toolkit Control Design & Simulation in development software LabVIEW for simulation of a two-position controller. This automatic control can be used to regulate regulation processes with high rise time such as temperature processes. Many of these processes can be categorized as second order systems. Main topic of this paper is the description of on-off controllers, their abilities and shortcomings and the way of use of such controllers to regulate processes of a second order. The publication then describes the development software LabVIEW, mainly useful toolbox Control Design & Simulation. This module was then used to design, simulate and optimize two-position controller. [ABSTRACT FROM AUTHOR]

The paper presents the design of positioning unit acting in a different way with respect to the known methods of controlling the positioning devices. The prototype positioning unit consists of a double-acting cylinder and electromagnetic brake. The proposed hybrid positioning unit allows to free programming of the displacement of the actuator. In the illustrated solution significant disadvantages which often occur in the positioning pneumatic drives were eliminated. The proposed hybrid positioning system provides to maintain the desired position, shorter positioning times, a higher average speed of the piston and a higher positioning accuracy. The fulfilment of such parameters provide a construction of accordingly developed unit which consist of pneumatic drive and control system. Element of control system is the measuring card NI PCI-6221 for data acquisition and control system positioning. LabVIEW allow to control the object, carrying out the visualization of the process control and analysis of measurement data. [ABSTRACT FROM AUTHOR]

Estimating damping in structure composed of different materials (steel, brass, aluminum) and processes still remains as one of the most extremely vast challengers. The paper presents Structural damping effect on beam vibration by impact hammer. Structural damping contributes to about 10-15% of total system damping. The main objective of this work is to estimate the natural frequency and damping ratio of cantilever beams of Aluminum, Brass, and Steel by LabVIEW software and validate the result with vibration analysis and Harmonic analysis utilizing ANSYS. Free vibration analysis was carried out for identifying the natural frequencies and the harmonic analysis was carried out for obtaining frequency replication curves from which damping ratios were estimated utilizing Half- power Band Width Method. It is observed that damping ratio is higher for brass than steel than aluminum. [ABSTRACT FROM AUTHOR]

This paper proposes a simulation model established according to sedimentation process basis of high rate slurry thickener using modified Kynch flux theory and empirical formulas. A numerical simulation of the model has been developed using LABVIEW software in order to evaluate and predict the performance of sedimentation process in thickeners. Numerical solution of partial differential equations (PDE), which describe the model, is the result of resolving a selected numerical scheme using space-time discretization analysis, where the inputs are design/operation parameters, and ore settling characteristics. This study offers a convenient simulation system platform for both batch and continuous thickening, which can be used as a forecasting tool to identify thickener output operating conditions. [ABSTRACT FROM AUTHOR]

In this paper a Backtracking Search Optimization Algorithm (BSA) toolkit has been developed in the LabVIEW™ environment. LabVIEW™ provides a graphical programming environment to design measurement and control applications. The development of BSA toolkit was motivated by the fact that only Differential Evolution (DE) toolkit was provided in LabVIEW™. Thus to design BSA toolkit, several modular virtual instruments have been developed for each BSA process. Developed BSA toolkit has been tested on several benchmark test functions and a comparative study with inbuilt DE toolkit has been performed, which shows results obtained from BSA toolkit are found superior to DE toolkit. [ABSTRACT FROM AUTHOR]

This paper focuses and presents the online performance, characteristics evaluation and parameters estimations for stand-alone Photovoltaic (PV) panel. The PV panel is subjected to very harsh working surrounding conditions characterized by very high air temperature, very high humidity fluctuations. The local area experience heavy and seasonal dust storms. The area is rarely cloudy and the irradiation level is on the high side in most period of the year. This experimental work is centralized around Laboratory Virtual Instrument Engineering Workbench (LabVIEW) environment. Three LabVIEW graphical programming blocks are developed to acquire data, to present numerical display and to store environment and electrical parameters. The Fourth block is dedicated to execute graphical online display of environment data. The Fifth module follows and display the electrical variables under clean and dusty condition. The sixth block is designed to acquire the I-V and P-V characteristics simultaneously. The seventh module estimates series and shunt resistance of PV panel under changing condition. The developed environment was fast and accurate in collecting and storing the data. It was very satisfactory to monitor the weather parameters and its impact on the electrical PV performance. The developed system was successful to reach I-V and P-V characteristics accurately. The series and shunt resistance were estimated and found to very close to the simulation results. [ABSTRACT FROM AUTHOR]

This paper deals with the modelling and the identification of an electromechanical Diesel engine actuator. The studied Bosch GPA-S actuator is designed for swirl/tumble flaps to control the air amount entering into the cylinder. This study aims to design a complete simulator that reproduces, with sufficient accuracy, the actuator dynamics taking into account the effects of the friction phenomenon. Hence, an overview of the actuator structure and its operation principle is first given. Then, its mathematical model as well as the nonlinearity, related to its behaviour, is discussed. Next, three identification procedures, which allow estimating both the system parameters and the friction model coefficients, are introduced. Finally, simulation results, using MATLAB, and experimental results, using LabVIEW, are presented demonstrating the effectiveness of the proposed techniques. [ABSTRACT FROM AUTHOR]

In this paper, a newly approach of human gait analysis for rehabilitation monitoring is presented. We developed a prototype for the gait analysis system and display the gait pattern by using LabVIEW software tool. The analysis is carried out by using the gait analysis hardware (GAH) that complete with sensory board, ultrasonic and wireless communication system. There are two types of system which are Gait Analysis Software Ultrasonic (GAS-US) and Inertial Measurement Unit (GAS-IMU) have been simulated to get minimum foot clearance (MFC) and orientation measurement. For the complete solution with the feature of error correction, both of GAS-US and GAS-IMU have been combined to perform a gait analysis system. The gait patterns that produce by the systems is displayed and achieved the rapid analysis of human gait by using LabVIEW. [ABSTRACT FROM AUTHOR]

Abstract: This paper proposes a software architecture based on LabVIEW for controlling discrete event systems. The proposed architecture is an adaptation of the producer–consumer design pattern. This work uses the control software of a multifunctional robotic end-effector as a test-bed for analyzing the applicability of the software architecture and its limitations and advantages. This case study demonstrates the effectiveness of the architecture for dealing with the integration of multiple functionalities in the control system. For this case study, the validation of the architecture is performed using two verification techniques: (1) a formal verification using timed automata and the UPPAAL model checker and (2) the CoFI (Conformance and Fault Injection) method for defining the set of test cases to check the software product. Both verification techniques identified errors that were introduced into the control system during the programming phase. [Copyright &y& Elsevier]