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In battery management system (BMS), the sampled current signals are always contaminated by colored noises, which make the accurate battery state of charge (SOC) estimation hardly be achieved. Existing methods for current noise processing are too complex to be adopted in engineering applications. By augmenting the model states with current bias, this paper presents an offset-free equivalent circuit...
State of charge(SOC) estimation is key to the battery management system used on electric vehicles. Recent studies often focus on the extended Kalman filter method for its theoretically optimal estimation property, but its effectiveness heavily depends on the priori information of noises and high precise battery models, therefore it is unable to deal with complex noises, and tend to fail on extreme...
This paper proposes a kind of coordinative control strategy of FWID EV's wheel velocity and torque, which can ensure that FWID EV drives stably and efficiently. This paper analyzes FWID EV's four-wheel steering angle and speed control strategy when the vehicle drives on the conditions of going-straight, turning, oblique-line-driving, transverse-driving and spinning-around. The control strategy calculates...
Automatic guided vehicles (AGVs) are pervasively used in plants, warehouses, institutes, and ports. Research on AGVs for foodstuff, biochemistry, medical testing, etc. however, due to their speciality, attracted little attention. In this paper, a novel double-deck AGV for material transporting in a narrow enclosed channel is proposed. This vehicle is composed of a trailer (the upper deck) and a tractor...
This paper concentrates on the corona discharge of overhead line insulators. Based on the fusion of corona discharge theory, high voltage insulation theory and ultraviolet photon detection theory, a new method of detection of insulator partial discharge is proposed, which applies ultraviolet pulse detection method in the detection of insulator corona discharge. So that the health conditions of overhead...
CAN field-bus is a technology of serial communication network effectively supporting distributed or real time control system. This paper presents a method to design a kind of distributed control system based on CAN bus, narrates application of CAN field- bus in supervision and control system of Production Line of Power Battery, and presents the structure of the system and of the intelligent control...
For power lithium battery pack assembly manipulator quick accurate positioning lithium battery layer groups demand, put forward a kind of stepping motor s-shaped speed curve control method, combined with a laser sensor, to precision positioning power lithium battery layer groups X, Y axis .Finally, the laser sensor experimental results prove this method can be used in lithium-ion power battery pack...
This paper took electric vehicle as research object and concentrated on its energy recovery system. In our experimental project, the idea of motor-generator integration was proposed. Theory and method to accomplish the integration was also presented in detail. Additionally, an intelligent gearbox was assembled into our vehicle model, which is a relatively new attempt to the research of electric vehicle...
Artificial neural network inverse system control method is being used widely in nonlinear system. This method is introduced to solve nonlinear distortion of acoustic directional system in this article. To acoustic directional system, a effective inverse model is built. Combined with traditional PID control model, a pseudo linear control system is provided. The results of simulation show that the proposed...
This paper based on the pure electric bus for research object, according to the requirements of electric vehicle performance, the parameters of electric motors and battery could be selected and designed. Combined with the electric vehicle simulation software ADVISOR to simulate the dynamic performance and driving range. Simulation software can not optimize the parameters, so the total capacity of...
In order to maximize the performance of lithium-ion batteries, an advanced rapid charging pattern is required. In this paper, it proposed a strategy of lithium-ion battery's rapid charging with ant-cycle system, which improved the rechargeable speed under the promise of little effect on lithium-ion battery life. Experimental results show that the obtained rapid charging pattern is capable of charging...
This paper elaborates using particle swarm optimization (PSO) algorithm to solve the problem that the operating efficiency of induction motor is too low. In this paper, optimizing the structure parameters for induction motor design is proposed. The presented method is based on the principle that the induction motor structure parameters have complex relationship with efficiency; its advantage is that...
In modern numeric control (NC) servo systems, manual tuning approaches are still dominant in servo parameters regulation due to systems' complexity. In manual tuning, it is not easy to evaluate the regulated systems from frequency responses. With regard to such problems, in this paper, we put forward a fuzzy comprehensive evaluation method, where three different features are proposed based on expert...
This paper describes an exact SOC-estimate mathematic model, which uses the battery State-Of-Charge (SOC) as a state variable and can simulate the whole progress of discharge accurately. The model parameters can be calculated according to the experimental data. The correction parameter C influences the accuracy of the open voltage model and the paper puts forward the optimal parameter identification...
This paper presents two methods for estimating the ground vehicle hand-wheel steering signals and for detecting the voltage-to-angle conversion and hand-wheel steering sensor faults. An enhanced input observer is used to estimate the actual hand-wheel steering angular signal and a sliding mode approach is utilized to improve the robustness of the method with respect to the parametric uncertainties...
Three-phase grid-connected voltage source inverter (VSI) acts as a key part of distributed generation (DG). The behavior of DG technologies that use dc sources such as photovoltaic and fuel cells relies mostly on the performance of the inverters. The dqo transformation and space vector pulse width modulation (SVPWM) are introduced for the control of the three-phase VSI. PI controller, fuzzy logic...
This paper investigates the application of stochastic model predictive control (SMPC) methodology for developing power management strategies tailored for the serial hydraulic hybrid vehicle (SHHV). The velocity demand from the driver is expressed as a random Markov process. A forward-facing closed-loop model of the SHHV powertrain is built and simulated in MATLAB/SIMULINK. The predictive model in...
Aiming at directivity design and analysis of acoustic directional dispersing device, this paper has explored theoretically directivity calculation of circular piston transducer array with units arranged at will. Based on superposition principle of sound, a formula used for the directivity calculation has been derived. With this formula, this paper has analyzed directivity of octagon transducer plane...
Acoustic feedback is a common phenomenon in public addressing systems. Howling, which results from acoustic feedback, restrains the gain of amplifier and affects the transmissive sound's definition. When feedback goes serious, the public addressing systems even can't work. So making acoustic feedback under control is an key gist to the designer of public address system. By researching the process...
This paper presents a microcontroller implementation of a fuzzy control algorithm applied to the self-developed AGV platform. The method applies fuzzy control theory to obtain the appropriate velocities of left wheel and right wheel by selecting optimal parameter of fuzzy logic controller. In order to put the fuzzy controller into operation, the run-time inference is reduced to a table look-up which...
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