Analyses and Simulation of Fuzzy Logic Control for Suspension System of a Track Vehicle

The vibration caused by terrible road excitation affects the ride quality and safety of track vehicles. The vibration control of suspension systems is a very important factor for modern track vehicles. A fuzzy logic control for suspension system of a track vehicle is presented. A mechanical model and a system of difft, rential equations of motion taking account of the mass of loading wheel are established. Then the fuzzy logic control is applied to control the vibration of suspension system of track vehicles for sine signal and random road surfaces. Numerical simulation shows that the maximum acceleration of suspension system can be reduced to 44 % of the original value for sine signal road surface, and the mean square root of acceleration of suspension system can be reduced to 21% for random road surface. Therefore, the proposed fuzzy logic control is an efficient method for the suspension systems of track vehicles.

Design and Assembly of an Improvised Logic Gates Simulator

This study aimed at designing and assembling an improvised Logic Gates Simulator that can be utilized as an instructional device in basic digital electronics instruction at Caraga State University Cabadbaran Campus, Philippines. This instructional device is believed to enhance the teaching-learning process and would also help address the scarcity of instructional equipment in the school and in the country. Descriptive method of research was employed to come up with the design of the simulator based on the course content of basic digital electronics subject. Acceptability of the improvised simulator based on standards set in this study was?gathered from the experts as respondents using a self-made questionnaire. The data were treated using average weighted mean utilizing parametric scales with verbal descriptions. Findings revealed that the improvised logic gates simulator is highly acceptable in terms of its cost and availability of components,?design and construction,operations, and troubleshooting features. It is concluded that the improvised logic gates simulator is at par in terms of standards on instructional devices based on the evaluation results of experts and is therefore recommended to be used in basic digital electronics instruction. The simulator is an innovative answer and an alternate solution to the scarcity of instructional materials and devices at Caraga State University Cabadbaran Campus.

CircuitVerse:A Simulator for Teaching and Learning of Digital Logic Circuit

Digital Logic is a fundamental course of majors in electronic information.The simulation experiment is an essential measure to help students understand the principles of digital logic.It can improve the efficiency of physical experiments and decrease instrument damage caused by operating errors.CircuitVerse is an open-source and Web-based tool of circuit design and simulation for teaching purposes.And now,teachers and students in many colleges and universities use it to assist teaching and learning.Firstly,through a particular example,the features of CircuitVerse and its usage are explained.Secondly,we briefly introduce the application of CircuitVerse in our teaching as well as the following development plans.We believe that our introduction can help teachers understand the software and how to make full use of this tool.

基于Simulink/Stateflow的三轴车辆ABS系统仿真

车辆防抱死系统(ABS)是一种使用率较高的车辆主动安全技术。民用市场上ABS使用率已经达到80%,大幅度提高了车辆的安全行驶性能,但是ABS系统在军用装甲轮式车辆的运用较少。本文建立了基于某三轴轮式装甲车辆建立了制动器模型、轮胎模型、垂直载荷模型,组成了整车模型。然后利用Simulink/Stateflow建立以滑移率和角加速度为逻辑控制参量,在不同附着系数的路面上ABS制动器模型。给定初值条件,在一定门限值条件下对ABS模型进行仿真,得到仿真结果表明该仿真系统能够较为真实地反映车辆ABS系统的实际工作过程,有效的缩短制动距离,提高安全性。

基于Simulink/Stateflow的ABS逻辑门限控制器仿真分析

以昆明理工大学道路交通模拟实验室的驾驶模拟器为研究对象,对其防抱制动系统的控制原理及其控制算法进行研究,并用Matlab6.0软件中的SIMULINK和STATEFLOW工具包编制ABS控制器模型。通过计算模拟,比较常规制动与防抱制动的不同效果。

基于Simulink／Stateflow的汽车防抱死系统的建模与仿真

防抱死系统（即ABS）是汽车关键的安全装置之一。该文在Simulink／Stateflow的环境下对ABS进行建模，用逻辑门限控制算法来建立控制模型，并对所建立的汽车制动系统模型进行仿真，得到仿真曲线，以验证汽车在不同路面上行驶时的制动性能。

基于Adams/Car和Matlab/Simulink的汽车半主动悬架模糊控制研究

基于Adams/Car软件创建汽车半主动悬架系统多体模型,利用改进遗传算法优化模糊规则的策略,实现汽车半主动悬架系统模糊控制器的设计,为了证明模糊控制器的控制效果和遗传算法的优化性能,在Matlab/Simulink环境中对汽车半主动悬架系统多体模型实现联合仿真分析。与被动悬架系统的分析对比说明,基于Adams/Car和Matlab/Simulink软件创建的汽车半主动悬架系统模糊控制器在很大程度上降低了人身加速度、改善车辆的乘坐舒适性和驾驶平顺性,同时也证明了采取联合仿真方法的有效性和准确性。

数字逻辑电路的Simulink仿真

数字逻辑电路的逻辑验证是一件繁琐的工作，费时又费力。本文采用MATLAB附带的图形仿真工具Simulink实现了数字逻辑电路的仿真，简单方便，成本低。为数字逻辑电路的逻辑验证和实验教学提供了一种新的方法。

Fuzzy logic for large mining bucket wheel reclaimer motion control—from an engineer's perspective

The bucket wheel reclaimer(BWR) is a key piece of equipment which has been widely used for stacking and reclaiming bulk materials(i.e.iron ore and coal) in places such as ports,iron-steel plants,coal storage areas,and power stations from stockpiles.BWRs are very large in size,heavy in weight,expensive in price,and slow in motion.There are many challenges in attempting to automatically control their motion to accurately follow the required trajectories involving uncertain parameters from factors such as friction,turbulent wind,its own dynamics,and encoder limitations.As BWRs are always heavily engaged in production and cannot be spared very long for motion control studies and associated developments,a BWR model and simulation environment closely resembling real life conditions would be beneficial.The following research focused mainly on the implementation of fuzzy logic to a BWR motion control from an engineer's perspective.First,the modeling of a BWR including partially known parameters such as friction force and turbulence to the system was presented.This was then followed by the design of a fuzzy logic-based control built on a model-based control loop.The investigation provides engineers with an example of applying fuzzy logic in a model based approach to properly control the motion of a large BWR following defined trajectories,as well as to show possible ways of further improving the controller performance.The result indicates that fuzzy logic can be applied easily by engineers to overcome most motion control issues involving a large BWR.

Controlling Torque Distribution for Parallel Hybrid Vehicle Based on Hierarchical Structure Fuzzy Logic

The Hierarchical Structure Fuzzy Logic Control (HSFLC) strategies of torque distribute for Parallel Hybrid Electric Vehicle (PHEV) in the mode of operation of the vehicle i. e. , acceleration, cruise, deceleration etc. have been studied. Using secondly developed the hybrid vehicle simulation tool ADVISOR, the dynamic model of PHEV has been set up by MATLAB/SIMULINK. The engine, motor as well as the battery characteristics have been studied. Simulation results show that the proposed hierarchical structured fuzzy logic control strategy is effective over the entire operating range of the vehicle in terms of fuel economy. Based on the analyses of the simulation results and driver’s experiences, a fuzzy controller is designed and developed to control the torque distribution. The controller is evaluated via hardware-in-the-loop simulator (HILS). The results show that controller verify its value.

Application of Fuzzy Logic for Autonomous Bay Parking of Automobiles

In this paper, we investigate the control problem of autonomous bay parking system. We choose a referenced parking lot and define a suitable parking spot based on some measurements at various places. A kinetic model is set up for the convenience of analysis and simulation. The pose of the car during the parking procedure can be determined by the initial pose, the backward speed, and the steering angle of the wheel. Then, both a fuzzy speed controller and a fuzzy steering controller are designed for the bay parking. Finally, simulation results show the effectiveness of our designed controllers.

基于Matlab/simulink的交—交变频器仿真研究

根据余弦交点法原理,对晶闸管触发控制的交—交变频器进行了研究,而变频器的控制采用无环流逻辑控制方式,利用Matlab/simulink和Power System工具箱进行交—交变频器的建模,最后分析了仿真结果的正确性。

Fuzzy Logic for Solving an Optimal Control Problem of Hypoxemic Hypoxia Tissue Blood Carbon Dioxide Exchange during Physical Activity

This paper aims at using of an approach integrating the fuzzy logic strategy for hypoxemic hypoxia tissue blood carbon dioxide human optimal control problem. To test the efficiency of this strategy, the authors propose a numerical comparison with the direct method by taking the values of determinant parameters of cardiovascular-respiratory system for a 30 years old woman in jogging as her regular physical activity. The results are in good agreement with experimental data.

基于Simulink/Stateflow的某型战机燃油系统功能仿真

针对某型战机飞行模拟器燃油系统功能仿真中复杂的数值计算和逻辑控制问题,提出一种基于Simulink/Stateflow的燃油系统建模与仿真方法。在分析仿真需求基础上,应用Simulink/Stateflow构建某型战机燃油系统的功能模型并进行仿真验证,说明模型代码的生成及使用。仿真结果表明:该方法能够直观有效地实现某型战机燃油系统的建模与仿真,并生成C++代码嵌入到仿真平台中,减少代码编写工作量,可为其他机型飞行模拟器燃油系统的开发提供参考。

Fuzzy Logic Control for Suspension Systems of Tracked Vehicles

A scheme of fuzzy logic control for the suspension system of a tracked vehicle is presented. A mechanical model for the whole body of a tracked vehicle, which is totally a fifteen-degree-of-freedom system, is established. The model includes the vertical motion, the pitch motion as well as the roll motion of the tracked vehicle. In contrast to most previous studies, the coupling effect among the vertical, the pitch and the roll motions of the suspension system of a tracked vehicle is considered simultaneously. The simulation of fuzzy logic control under road surface with random excitation shows that the acceleration, pitch angle and roll angle of suspension system can be efficiently controlled.

Fuzzy Logic Approach for Solving an Optimal Control Problem of an Uninfected Hepatitis B Virus Dynamics

We aimed in this paper to use fuzzy logic approach to solve a hepatitis B virus optimal control problem. The approach efficiency is tested through a numerical comparison with the direct method by taking the values of determinant parameters of this disease for people administrating the drugs. Final results of both numerical methods are in good agreement with experimental data.

Skyrmion-based logic gates controlled by electric currents in synthetic antiferromagnet

Skyrmions in synthetic antiferromagnetic(SAF) systems have attracted much attention in recent years due to their superior stability, high-speed mobility, and completely compensated skyrmion Hall effect. They are promising building blocks for the next generation of magnetic storage and computing devices with ultra-low energy and ultra-high density.Here, we theoretically investigate the motion of a skyrmion in an SAF bilayer racetrack and find the velocity of a skyrmion can be controlled jointly by the edge effect and the driving force induced by the spin current. Furthermore, we propose a logic gate that can realize different logic functions of logic AND, OR, NOT, NAND, NOR, and XOR gates. Several effects including the spin–orbit torque, the skyrmion Hall effect, skyrmion–skyrmion repulsion, and skyrmion–edge interaction are considered in this design. Our work may provide a way to utilize the SAF skyrmion as a versatile information carrier for future energy-efficient logic gates.

A Novel Design of Octal-Valued Logic Full Adder Using Light Color State Model

Due to the demand of high computational speed for processing big data that requires complex data manipulations in a timely manner,the need for extending classical logic to construct new multi-valued optical models becomes a challenging and promising research area.This paper establishes a novel octal-valued logic design model with new optical gates construction based on the hypothesis of Light Color State Model to provide an efficient solution to the limitations of computational processing inherent in the electronics computing.We provide new mathematical definitions for both of the binary OR function and the PLUS operation in multi valued logic that is used as the basis of novel construction for the optical full adder model.Four case studies were used to assure the validity of the proposed adder.These cases proved that the proposed optical 8-valued logic models provide significantly more information to be packed within a single bit and therefore the abilities of data representation and processing is increased.

A tunable fuzzy logic controller for the vehicle semi-active suspension system

On the basis of analyzing the system constitution of vehicle semi-active suspension, a 4-DOF (degree of freedom) dynamic model is established. A tunable fuzzy logic controller is designed by using without quantification method and taking into account the uncertainty, nonlinearity and complexity of parameters for a vehicle suspension system. Simulation to test the performance of this controller is performed under random excitations and definite disturbances of a C grade road, and the effects of time delay and changes of system parameters on the vehicle suspension system are researched. The numerical simulation shows that the performance of the designed tunable fuzzy logic controller is effective, stable and reliable.

Fuzzy Logic Strategy for Solving an Optimal Control Problem of Glucose and Insulin in Diabetic Human

This paper aims at the development of an approach integrating the fuzzy logic strategy for a glucose and insulin in diabetic human optimal control problem. To test the efficiency of this strategy, the author proposes a numerical comparison with the indirect method. The results are in good agreement with experimental data.