Papers by Keyword: Hardware in the Loop (HIL)

Abstract: Having studied Adaptive differential technology of In-wheel motor driving midibus, analyzed the differences in terms of self-adaptive differential between traditional cars and in-wheel motor drive cars by comparison, introduced the method to realize the adaptive differential technology. By building the hardware in loop simulation of model electric bus, simulation including step steering, sine steering and steady turning conditions, we verify the in-wheel motor driving midibus under various driving conditions has good self-adaptive differential performance.

Abstract: This paper discussed the brake performance and reviewed the research progress of the eddy current-hydraulic hybrid brake system. The paper mainly described the design principle of HIL testing bench, and presented a structure drawing of HIL testing bench. Based on the basic principle and structure of HIL testing bench, a real testing bench including hardware, software, interface, and virtual controller on PCs etc., is manufactured. Through two kinds of experiments on wet and dry road, the results indicates that the hybrid brake system has a perfect performance, the HIL testing bench of hybrid brake system is very convenient to study and simulate the braking system. Because the simulation on PCs cannot solve lots of actual problems, with the HIL testing bench, more actual research project can be done in the future.

Abstract: This paper presents a method to solve the Evolutionary Algorithm (EA) problems for optimal tuning of the Proportional-Deferential (PD) controller parameters. The major efficiency of the proposed method is the Genetic Algorithm (GA) stuck avoidance as well an appropriate estimation for GA lower and upper bounds. Also by this method for the Particle Swarm Optimization (PSO) methodology the initial choice of the controller parameters can be fulfilled to achieve the acceptable performance accuracies. For both GA and PSO methods, the Linear Quadratic Regulator (LQR) obtained trend is used as the reference for the determination of the aforementioned bounds and initial guess. The presented algorithm was applied to regulate a PD controller for the attitude control of a virtual satellite and also with Hardware-in-the-loop (HIL) reaction wheels. Heavy burden trying and error was eliminated from the PD controller design which can be mentioned as the important merit of the presented study.

Abstract: Engine rotational dynamics can be estimated from the tooth signals of the crankshaft wheel. The accuracy of the calculation rises when the number of tooth increases. However, the engine control unit (ECU) needs to detect the tooth position and converts it into time information. It will overload the interrupt system. In order to overcome this problem, the field programmable gate array (FPGA) is proposed to implement the engine rotational dynamics calculation with stroke identification algorithm. The FPGA can accelerate the interpolation and the multiplication processes by implementing them in parallel computation. Thus, the proposed method can calculate the engine rotational dynamics in real time, and then the calculation results can be transferred into the robust Kalman filter which was established by Matlab/Simulink in a computer, i.e., a simulated ECU. Finally, a 125cc scooter is utilized to verify the proposed algorithm. The test results show that the proposed method can be used to obtain precise information of engine rotational dynamics.

Abstract: Organic Light Emitting Diodes (OLED) are receiving increased attention due to tremendous application potential these devices hold in the areas of large area displays and lighting applications. However, the problems of efficiency, stability and shelf life are major challenges for making OLEDs an attractive alternative. The simple device structure involving anode, emissive layer and cathode is no longer the norm. Recently, various buffer layers like Hole Injection Layer (HIL), Hole transport Layer (HTL), Electron Injection Layer (EIL), Electron Transport Layer (ETL) etc. are being widely used as integral parts of the OLED architecture to enhance the performance parameters. The nomenclature of these layers is often confusing and sometimes used by different authors to mean different layers and a common and universal nomenclature for layers is still wanting. Applying a buffer layer, often called as the hole injecting layer (HIL) between anode and emissive layer is a general technique for increasing the efficiency and stability of organic light emitting diodes. Poly- (3,4-ethyhylene dioxythiophene): poly- (styrenesulphonate) (PEDOT:PSS) is a very common and popular such HIL used in OLEDs. In this chapter, a basic structure of OLEDs has been discussed in perspective with this HIL material and the effect of annealing this PEDOT: PSS layer on the characteristics of the device at different temperatures ranging from 100°C to 300°C in vacuum. Devices fabricated in clean room conditions are characterized for their electrical and optical properties. Equivalent circuits of the devices are deduced using impedance spectroscopy and discussed. Surface morphology of the HIL layers using atomic force microscopy (AFM) provides reasons for the variation of the device properties with the annealing of HIL.