Papers by Keyword: Simulation

Abstract: Parallel robots are widely used in the manufacturing industry. In this paper, a planar 3-RRR parallel robot is studied. The inverse kinematics mathematical model is established for this kind of mechanism. Furthermore, a physical simulation model is established by virtue of MATLAB/SimMechanics and a relevant inverse kinematics simulation is implemented at the assumption of known conditions of the end-effector of robot. Through inverse kinematics simulation, the motion rules of driving parts of the planar 3-RRR parallel robot are obtained, and visualization of simulation process is realized in the system. The simulation results show that this method is much more effective and convenient when a certain simulation is implemented for the parallel mechanisms. Meanwhile, it provides a theoretical foundation and a better analytical approach of simulation for the controller design and further analysis of complex multi-linkage mechanisms in the future.

Abstract: This article describes the advantages and disadvantages of several common maximum power point tracking (MPPT) control algorithms. And integrating various control algorithms, we propose a novel MPPT control algorithm that using the short-circuit current method at the left of maximum power point, next to the maximum power point using the perturbation and observation method of variable step, which becomes gradually approaching step by step to search, the right of the maximum power point using the open circuit voltage method. In order to verify the effectiveness of the improved algorithm, this paper also compares the traditional perturbation and observation method with the improved algorithm for the simulation, the solar cell output power curve obtained in the experiment will be introduced in the text in detail.

Abstract: Based on the mathematical model of brushless DC motor, a simulation model of brushless DC motor (BLDCM) double closed-loop control system is established by using the voltage equation, the electromagnetic torque equation and the motion equation based on Matlab, then introduces the sub-modules of the controlling system in detail. PID control is used in the speed loop and hysteresis current track of PWM is used in the current loop. The reasonability and validity are testified by the simulation results and this novel method offers a new thought way for designing and debugging actual motors.

Abstract: In this paper, we present a virtual prototype for a Upper-Limb Rehabilitation Robotic System is review, where the conflict of stability for a non-linear system its implemented, using as a model a double inverted pendulum and its response in Matlab - SimMechanics. It demonstrates the ability and ease of using new computerized tools where simulation and modeling of a system becomes an important utility to understand control concepts and carry them out in a controlled environment, it also can be of great help ensuring the complete characterization of a system, in which it can also result in experimental results. A soft trajectory follower PID controller is implemented to provide individual rehabilitation movements in a 2 DoF robotic system.

Abstract: In light of the integrated control of language, music and motion rhythm by human brain, the paper proposes a preliminary scheme to overcome a long-standing obstacle in the design paradigm of contemporary intelligent robot, i.e., by employing a set of simulated rhythm sensing systems and without changing the hard drive capacity, it offers a solution to the contradiction between synchronization of perception, planning and execution and excessive calculation task, thus fulfilling the long dream of "bottleneck breaking through"

Abstract: Fermentation process using recombinant strain for production of recombinant protein is widely used in commercialization of the biotechnologies. The continuous stirred tank reactor (CSTR) is a typical microbial cultivation method, has the major advantage of high productivity. Mathematical modeling and simulation is useful for analysis and optimization of the CSTR fermentation process. Most of the mathematical models developed for CSTR are black box models without information of the intracellular dynamics and regulations. In this research, a mathematical model is built based on gene regulation for recombinant protein production using CSTR, and simulation is made using this model.

Abstract: Temperature characteristic analysis of the triple-junction solar cell was carried out using circuit simulator under concentration conditions. The temperature exponent of saturation current density for each single-junction solar cell was derived. Extracted temperature exponents were used in the equivalent circuit model for the triple-junction solar cell, and the calculations of solar cell performance were carried out at various temperatures and concentration ratios. The calculation results agreed well with the measured results.

Abstract: This paper introduces some closer aspects of mechatronical and process oriented machine tool design. Basis of the considerations are the demands of the machining process and the workpiece dimensions and material. The machining area, the axis and the technical features are designed on characteristic parameters. The forces, torque and speed are derived out of these parameters. Control technique is adapted to the process specific demands of the machine and the workpiece. The machine tool behavior is adapted to the process demands so that the costs and energy consumption are minimized. Some examples are included to present properties concerning accuracy, dynamic behavior and influencing parameters.

Abstract: The intake system sub-model, the fuel dynamics sub-model and the power output sub-model are studied in this paper based on Elbert Hendricks engine mean model. Engine output characteristics using computational model is established in MATLAB/Simulink. Parameter of the modeling and simulation process is obtained through experiments, and finally, the engine bench test is done, and compared it with the simulation curve in same conditions. The results show that the model calculation has smaller error, higher precision, and which can meet the basic requirements of the engine modeling in actual control.

Abstract: In this paper, the operation of a wind energy conversion system (WECS) incorporating a Double-Fed Induction Generator (DFIG), under various wind speeds and faulty conditions, is investigated through simulation. In this study the simulation of such a system (DFIG-WECS) was held by using the software Matlab/Simulink.. The simulation results are presented and evaluated for the issues of fault diagnosis and identification. More specifically, a DFIG-WECS has been simulated under various wind speeds and when a short-circuit occurs in the back-to-back converter and in the DC link from the point of view of these issues. In this work, it has been concluded that the investigated faults have caused a specific and unique harmonic content in grid, rotor and stator phase currents, which could be used for fault diagnosis and identification.