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Search Results: 1 - 10 of 9491 matches for " 皇甫宜耿 "
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质子交换膜燃料电池系统建模仿真与控制
Modelling and Simulation System of Proton Exchange Membrane Fuel Cell

皇甫,石麒,李玉忍
- , 2015,
Abstract: 对质子交换膜燃料电池(PEMFC)建立合适的数学模型,有助于改善 PEMFC 的设计。结合燃料电池的电场与温度场,建立了包含质子交换膜燃料电池的电化学模型与温度模型的数学模型,通过MATLAB软件进行仿真,仿真结果表明该模型较好地反映出 PEMFC 系统的动态特性,并研究了工作温度、反应气体工作压力以及质子交换膜面积变化对电池输出性能的影响。与此同时结合所建立的质子交换膜燃料电池模型设计了一款采用PID控制的Boost升压电路,将燃料电池输出不稳定的电压转变成可供给负载稳定使用的24V电压。
Appropriate modelling and simulation system of Proton exchange membrane fuel cell is helpful to improving PEMFC design. In this paper, based on the electric field and temperature field of fuel cells, a mathematical model of a number of proton exchange membrane fuel cells is built, using the temperature and the electrochemical model. Through MATLAB simulation, the results show that the model better reflects the dynamic PEMFC system properties. The changes of operating temperature, gas pressure and membrane area, which affect the performance of the fuel cell output, were studied. At the same time, we designed a boost converter using PID control for proton exchange membrane fuel cell model, thus converting the fuel cell output voltage into stable supply 24 V for load
大扰动Buck-Boost变换器的鲁棒高阶滑模控制
吴宇, 皇甫, 张琳, 周雒维
中国电机工程学报 , 2015, DOI: 10.13334/j.0258-8013.pcsee.2015.07.023
Abstract: 在利用诸如风、光、氢等随机性新能源发电的过程中,由于间歇性的能量输入和不断变化的输出负载等原因,对电源变换器的鲁棒性设计提出了更高的要求。针对传统滑模控制变换器自身存在不可避免的抖颤问题,该文基于一种Super-Twisting高阶滑模控制算法,设计了以TMS320F28035为控制核心的无抖颤、强鲁棒滑模电源变换器。并以Buck-Boost变换器为例,针对随机性新能源发电中输入输出端存在的大扰动问题,与增量式PI控制效果进行对比实验。实验结果表明:高阶滑模控制变换器在输出负载大扰动下具有很强的鲁棒性;高阶滑模控制变换器在输入电压大扰动下同样具有很强的鲁棒性。
一种带耦合电感和充电泵的单级式高增益光伏微逆变器拓扑
Single Stage High Gain Micro-Inverter with Tapped Inductor and Charge Pump

赵犇, 马瑞卿, 皇甫, Alexander Abramovitz
- , 2016,
Abstract: 传统的双级式微逆变器通常由一级具有最大功率点跟踪功能的高增益DC-DC变换器和一级全桥逆变器串级组成。单级式微逆变器可以在一级功率拓扑中实现上述功能,因而具有结构简单、器件少的优势。然而,单级式拓扑在高增益升压、功率解耦方面给设计工作带来了挑战。提出一种带耦合电感和充电泵的单级式高增益微逆变器拓扑,引入耦合电感和充电泵实现高电压增益;利用Boost变换器与全桥逆变器共用开关管实现单级式拓扑;同时保留了高压直流母线,从而可以减小解耦电容容值。仿真和实验结果验证了该拓扑具有较高的电压增益、较小的解耦电容、高质量的正弦输出、以及较高的变换效率。
Traditional two-stage micro-inverter is usually comprised of a high gain step-up DC-DC converter under maximum power point tracking control and a cascaded full bridge inverter. Single stage micro-inverter can achieve the functions above in one power stage, thus it has the advantages of simpler circuit and less components. Nevertheless, single stage topology has some challenges on high gain voltage step-up and power decoupling. This paper proposed a single stage high gain micro-inverter topology with tapped inductor and charge pump. Tapped inductor and charge pump are employed to attain high gain voltage step-up. A single power stage is realized by Boost converter sharing the switches with full bridge inverter. And the high voltage DC bus results in less power decoupling capacitance. The simulated and experimental results have proved that the proposed topology has the merits of high gain voltage step-up, less power decoupling capacitance, high quality sinusoidal output and good conversion efficiency
基于滑模变结构的燃料电池离心空压机流量控制
Flow Control of Fuel Cell Centrifugal Compressor Based on Sliding Mode Variable Structure

赵冬冬,华志广,张璐,皇甫
- , 2017,
Abstract: 质子交换膜燃料电池是利用氢气与氧气的电化学反应产生电能的装置,其中空气压缩机是关键部件,负责向燃料电池的阴极供给空气(含约21%氧气),与氢质子、电子产生电化学反应。供给空气的流量与压力之间影响到燃料电池的输出性能,即V-I特性曲线,同时对燃料电池系统的安全性产生影响。不足的空气供给会使燃料电池产生"氧气饥饿"现象,会降低燃料电池的寿命,严重情况下会破坏质子交换膜。采用滑模变结构方法控制离心压缩机的输出流量,使其在动态负载情况下满足燃料电池对空气供给的要求,采用基于super-twisting的二阶滑模控制压缩机的驱动转矩,实现对输出流量的动态调节,仿真结果证明了该方法的有效性。
Air compressor is the key component in the proton exchange membrane fuel cell (PEMFC) system which utilizes the electrochemical reaction of the hydrogen and oxygen to produce electricity. Compressed air (including 21% oxygen) provided by the compressor has to be supplied to the cathode of PEMFC. The mass flow and pressure of the supplied air directly influence the output performance, i.e., the V-I characteristics, as well as the safety of the fuel cell. Insufficient air flow may lead to the "oxygen starvation" phenomenon which reduces the fuel cell lifespan and could damage the membrane in the sever case. In order to satisfy the fuel cell requirement, a sliding model controller is developed in this paper to control the mass flow. A super-twisting method is used to control the compressor driving torque and thereby the mass flow dynamics. The proposed method is validated by the simulation results
一种鲁棒高阶滑模Super-Twisting算法的全桥逆变器
A Super-Twisting Algorithm of Robust High Order Sliding Mode Control for Full-Bridge Inverter

皇甫,王毅,赵冬冬,梁波
- , 2015,
Abstract: 利用高阶滑模super-twisting算法设计一种全桥逆变电路的控制器。该算法的核心思想是将离散控制律转移至更高阶的滑模面,从本质上消除一介滑模的抖颤影响。为了验证算法的可行性和有效性,利用MATLAB仿真软件对控制系统进行了对比实验,结果表明:1)在稳态性能下,相比于典型PI控制高阶滑模控制具有更好的跟踪效果。2)在输入和负载的扰动情况下,高阶滑模控制显示出强鲁棒性,对输入和负载的扰动不敏感。
Based on Super-Twisting algorithm of high order sliding mode, this paper designs a controller of full bridge inverter. The core idea is to transfer the discrete control law to high order sliding manifold, essentially eliminating the impact of chattering effect. In order to justify the feasibility and effectiveness of the algorithm, it uses MATLAB to simulate control systems and compare results. The simulation results and their analysis show preliminarily that:(1) under the steady state condition, compared with the typical PI control, the high order sliding mode has better tracking; (2) under the condition of large disturbances in input and output, the high order sliding mode control shows strong robustness to the input and output disturbances
电机转速环节Super-Twisting算法二阶滑模控制律设计与研究
Second-Order Sliding Mode Control Based on Super-Twisting Algorithm for the Speed Outer Loop of Motors

张庆超,马瑞卿,皇甫,王姣
- , 2016,
Abstract: 针对电机转速环节,研究了以Super-Twisting算法(STA)为基础的转速闭环二阶滑模控制律设计方法,无需对转速求导或求解转速极值。利用Lyapunov函数证明了系统的稳定性,并分析了系统中比例滑模项对系统收敛的稳定性和快速性的影响,以及不同类型比例滑模项的共同点与区别。仿真结果表明,在STA基础上人为增加比例滑模项可以提高系统的收敛速度,而不受系统工作状态影响,并且不改变系统的STA二阶滑模特性。由于各种电机都具有统一的转子运动方程,因此,研究结果对各种电机的转速环节二阶滑模闭环控制具有通用性。
Aiming at the speed outer close-loop control for the motors, the design method of the second-order sliding mode control law based on the Super-Twisting algorithm(STA) is researched, which doesn't need the derivative or the extreme value of the speed. The stability is proved by using Lyapunov function. And the influence for the system stability and the rapidity of convergence by the proportional of the sliding mode variable is analyzed, also the commonality and the differences of the various types proportional of the sliding mode variable. Simulation results show that the introduced proportional of the sliding mode variable in STA can improve the convergence speed of the system regardless of the running state of the motor, and the STA second-order sliding mode features of the motor system is not changed. Due to the unified rotor motion equation, the analyzed result of this paper is general to the speed loop second-order sliding mode control for all kinds of motor
飞机防滑刹车系统滑移率自适应滑模控制研究
Adaptive Sliding Mode Control Strategy for the Aircraft Antiskid Braking System Based on Slip Ratio

付龙飞,田广来,王鹏,梁波,皇甫
- , 2015,
Abstract: 针对含有参数不确定的非线性系统,提出了一种自适应滑模控制(ASMC)算法。根据飞机地面滑跑特性的受力分析,建立了飞机防滑刹车系统(ABS)的地面动力学模型;通过对飞机防滑刹车系统模型的非线性分析,针对非线性系统的不确定参数提出了以双极性sigmoid函数为趋近函数的滑模控制(SMC)算法,并针对切换增益和边界层设计了自适应控制算法以减小滑模控制的抖振现象;最后采用李雅普诺夫理论分析了设计的自适应滑模算法的敛散性。 MATLAB仿真结果表明,自适应滑模控制算法相较于传统的滑模算法能在更短的时间内获取跑道的最大结合系数,达到最佳滑移率,缩短刹车时间。
An adaptive sliding mode control (ASMC) algorithm was proposed to control the nonlinear system with parameter uncertainty. The complex characteristics of aircraft antiskid braking system (ABS) were analyzed. According to uncertainty about the system, a sliding mode control (SMC) algorithm was presented with bipolar sigmoid function reaching law. The sliding mode gain factor and boundary layer were discussed and its adaptive algorithm was designed in order to decrease the chattering. The convergence of the ASMC algorithm was analyzed with Lyapunov theory at last. The results from simulation indicate that ASMC strategy, compared with the traditional SMC strategy, makes the ABS obtain the maximum friction coefficient in a shorter time. Additionally it is shown that the system works under optimal slip ratio and shortens the braking time
大扰动下Buck电源变换PCL控制器设计
PCL Sliding Mode Controller Design for Buck Converter under Large Disturbances

许佳妮,皇甫,卓生荣,庞圣钊
- , 2016,
Abstract: 为提高系统在大扰动下的响应的快速性和鲁棒性,针对纯电动汽车上的DC-DC变换器,设计了一种基于prescribed convergence law(PCL)算法的鲁棒滑模控制器。以Buck变换器为例,验证该滑模算法在有限时间内的收敛性,并与PI和传统滑模控制效果进行对比。结果表明:①无扰动时,PCL滑模算法稳态精度高,调节时间短,输出纹波小;②输入电压和负载电阻大扰动时,PCL滑模算法响应速度更快,鲁棒性更强。
On the basis of Prescribed Convergence Law(PCL) algorithm, this paper presents a robust sliding mode controller for the DC-DC converter in the pure electric vehicle in order to improve the rapidity and robustness under large disturbances.Taking Buck converter as an example, this paper verifies the convergence of the sliding mode algorithm in finite time, and compares it with PI and the traditional sliding mode control. The simulation results and their analysis show preliminarily that:① without disturbances PCL control has high steady state accuracy, short regulation time, and small output ripple,② under large disturbances in the input voltage and output load, PCL control shows faster response and stronger robustness
光伏用FIBC变换器稳定分析与谐振抑制方法
Stability Analysis and Resonance Suppression Method with FIBC Converter System for PV Application

庞圣钊, 皇甫, 郭亮, 骆光照, Babak Nahid-Mobarakeh
- , 2017,
Abstract: 针对光伏发电系统输出电压低、功率不稳定、电压波动等电能质量问题,提出了一种二阶低通滤波器和高增益FIBC变换器的组合结构。为了解决滤波器和变换器级联可能造成的谐振现象,设计了一种可有效抑制谐振发生的稳定器,能够在不增加系统体积重量和功率损耗的前提下,抑制系统的振荡和波形畸变。首先建立了系统的数学模型,并利用Lyapunov第一法对系统的稳定性能进行分析,证明了该方法的可行性。仿真结果验证了所提控制策略和拓扑结构的正确性和有效性。
In order to solve the power quality problems, such as low voltage output, power instability and voltage fluctuation. A combined structure of two order low-pass filter and high gain FIBC converter is presented. By way of disposing the resonance phenomenon caused by the cascade of filter and converter, this paper designs a kind of stabilizer which can restrain the resonance effectively. It can suppress the oscillation and distortion of the system without increasing the volume weight and power loss of the system. Firstly, the mathematical model of the system is established. Then, the stability of the system is analyzed by using Lyapunov method, and the feasibility of the method is proved. The simulation results verify the correctness and effectiveness of the proposed control strategy and topology
一种基于STD的Buck变换器滑模控制
A STD Based Sliding Mode Control Design for DC-DC Buck Converter

皇甫,卓生荣,王小飞,蒋康博
- , 2016,
Abstract: 针对新能源用DC-DC Buck变换器常规滑模控制需要同时检测变换器输出电压和滤波电容电流,提出一种基于super-twisting微分器(STD)的滑模控制器。与常规滑模控制器相比,所提出的控制方法只需检测变换器输出电压,无需测量电容电流,因此可以将电流传感器从控制环路中移除,从而简化控制系统。仿真实验结果表明,与常规滑模控制器相比,所提出的STD滑模控制具有更小的稳态误差,同时保留了对输入电压扰动和输出负载扰动的强鲁棒性。
The conventional sliding mode control design for DC-DC buck converter needs to measure the converter output voltage and the capacitor current simultaneously. In contrast to this, the paper proposes an innovative super-twisting differentiator (STD) based sliding mode control for DC-DC buck converter. The STD based sliding mode control only needs to measure the converter output voltage. There is no need to measure the capacitor current, such that the current sensor can be removed from the control loop, thus the control system is simplified. It has been demonstrated by simulation results that when compared with conventional sliding mode control, the proposed STD sliding mode control can achieve smaller steady state voltage error and at the same time, the strong robustness against the input voltage perturbation and load resistance disturbance can also be preserved
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