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| 1 | Control strategy of a novel electric power steering system integrated with active front steering function显示文摘A novel electric power steering system(EPS) integrated with active front steering(AFS) is developed.It has functions of both AFS system and EPS system with two actuator units:the AFS actuator unit and the EPS actuator unit.The AFS actuator unit controls the displacement transfer behavior of the steering system,and improves the handling stability under adverse road conditions by varying the steering ratio directly related to the speed and road conditions.The EPS actuator unit controls the force transfer behavior of the steering system,and improves the steering portability and road feel of the vehicle.Based on a dynamic model,the mixed H2/H∞ control strategy of the EPS actuator and the active steering intervention control strategy of the AFS actuator are designed.The simulation indicates that the novel EPS system with the designed control strategies has obvious advantages in vehicle handling stability and the driver's road feel over the traditional EPS system,and extends the vehicle's steering performance. | ZHAO WanZhong LIN Yi WEI JianWei SHI GuoBiao | 2011 | Science China(Technological Sciences)2011，54，6： | 25 |
| 2 | Tracking Performance of Electric Power Steering System Based on the Mixed H_2/H_∞ Strategy显示文摘The tracking performance of motor current is an important factor that affects the assistance torque of electric power steering (EPS) system. Bad tracking performance will cause assistant torque delay, and make road feeling bad, and is influenced by the input steering torque and system measuring noise. However the existing methods have some shortages on system's robust dynamic performance and robust stability. The mixed H2/H∞ strategy for recirculating ball-type EPS system in a pure electric bus is proposed, and vehicle dynamic model of the system is established. Due to the existence of system model uncertainty, disturbance signals, sensor noises and the demand of system dynamic performance, the indexes of robust performance and road feeling for drivers are defined as the appraisal control objectives. The H∞ method is introduced to design the H∞ controller, and the H2 method is applied to optimize the H∞ controller, thus the mixed H2/H∞ controller is designed. The response of EPS system to the motor current command with amplitude of 20 A, the road disturbance with amplitude of 500 N and the sensor random noise with the amplitude of 1 A is simulated. The simulation results show that the recirculating ball-type EPS system with the mixed H2/H∞ controller can attenuate the random noises and disturbances and track the boost curve well, so the mixed H2/H∞ controller can improve the system's robust performance and dynamic performance. For the purpose of verifying the performance of the designed control strategy, the motor current tracking performance ground tests are conducted with step response input of the steering wheel, double-lane steering test and lemniscate steering test, respectively. The tests show that the mixed H2/H∞ controller for the recirculating ball-type EPS system of pure electric bus is feasible. The designed controller can solve the robust performance and robust stability of the system, thus improve the tracking performance of the EPS system and provide satisfied road feeling for the drivers. | ZHAO Wanzhong SHI Guobiao LIN Yi NIE Hong | 2011 | Chinese Journal of Mechanical Engineering2011，24，4： | 10 |
| 3 | Analysis of precipitation in a Cu-Cr-Zr alloy显示文摘Precipites in Cu-0.42%Cr-0.21%Zr alloy were analyzed by using scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDXS)and transmission electron microscope(TEM).After the solid solution was performed at 980oC for 2 h,water-quenched and aged at 450oC for 20 h,the precipite had a bimodal distribution of precipitate size.The coarse precipitates are pure Cr and Cu5Zr,the dispersed fine precipitate is CrCu2(Zr,Mg)and pure Cr ranging from 1 to 50 nm.The coarse phases formed during solidification and were left undissolved during solid solution.The fine precipitates are the hardening precipitates that form due to decomposition of the supersaturated solid solution during aging. | Zhao Mei Lin Guobiao wang Zidong Zhang Maokui | 2008 | China Foundry2008，5，4： | 5 |
| 4 | Effects of axial gap and nozzle distribution on aerodynamic forces of a supersonic partial-admission turbine显示文摘The turbine in an LH2/LOX rocket engine is designed as a two-stage supersonic partialadmission turbine. Three-dimensional steady and unsteady simulations were conducted to analyze turbine performance and aerodynamic forces on rotor blades. Different configurations were employed to investigate the effects of the axial gap and nozzle distribution on the predicted performance and aerodynamic forces. Rotor blades experience unsteady aerodynamic forces because of the partial admission. Aerodynamic forces show periodicity in the admission region, and are close to zero after leaving the admission region. The unsteady forces in frequency domain indicate that components exist in a wide frequency region, and the admission passing frequency is dominant.Those multiples of the rotational frequency which are multiples of the nozzle number in a fulladmission turbine are notable components. Results show that the turbine efficiency decreases as the axial gap between nozzles and the 1 st stage rotor(rotor 1) increases. Fluctuation of the circumferential aerodynamic force on rotor 1 blades decreases with the axial gap increasing. The turbine efficiency decreases as the circumferential spacing between nozzles increases. Fluctuations of the circumferential and axial aerodynamic forces increase as the circumferential spacing increases. As for the non-equidistant nozzle distribution, it produces similar turbine performance and amplitudefrequency characteristics of forces to those of the normal configuration, when the mean spacing is equal to that of the normal case. | Jinpeng JIANG Jiawen LI Guobiao CAI Jue WANG Qiyan LIN | 2017 | Chinese Journal of Aeronautics2017，30，6： | 4 |
| 5 | Perovskite-based color camera inspired by human visual cells显示文摘There are two primary types of photoreceptor cells in the human eye:cone cells and rod cells that enable color vision and night vision,respectively.Herein,inspired by the function of human visual cells,we develop a high-resolution perovskite-based color camera using a set of narrowband red,green,blue,and broadband white perovskite photodetectors as imaging sensors.The narrowband red,green,and blue perovskite photodetectors with color perceptions mimic long-,medium-,and short-wavelength cones cells to achieve color imaging ability.Also,the broadband white perovskite photodetector with better detectivity mimics rod cells to improve weak-light imaging ability.Our perovskite-based camera,combined with predesigned pattern illumination and image reconstruction technology,is demonstrated with high-resolution color images(up to 256 x 256 pixels)in diffuse mode.This is far beyond previously reported advanced perovskite array image sensors that only work in monochrome transmission mode.This work shows a new approach to bio-inspired cameras and their great potential to strongly mimic the ability of the natural eve. | Yujin Lu Zhong Ji Guobiao Cen Hengchao Sun Haibao Wang Chuanxi Zhao Zhong Lin Wang Wenjie Mai | 2023 | Light(Science & Applications)2023，12，2： | 2 |
| 6 | Research of the temperature distribution of the hollow conductor in the evaporative cooling hydro-generators显示文摘 | RUAN Lin GU Guobiao TIAN Xindong | 2005 | Electrical power components and systems2005，33，2： | 1 |
| 7 | Brazed joints of Cf/SiC composite to Ti-alloy using Ag-Cu-Ti-( Ti + C ) mixed powder as interlayer 显示文摘 | Lin Guobiao Huang Jihua | 2006 | Powder Metallurgy2006，49，4： | 1 |
| 8 | Research of the temperature distribution of the hollow conductor in the evaporative cooling hydro-generators显示文摘 | Ruan Lin Gu Guobiao Tian Xindong | 2005 | Electric Power Components and Systems2005，33，2： | 1 |
| 9 | Numerical simulation for circulating systems and experimental comparison of the closed-loop, self-circulating evaporative cooling of hydro-generators显示文摘 | Ruan lin Gu Guobiao Tian Xindong | 2004 | Electrical Engineering2004，186，3： | 1 |
| 10 | Joints of carbon fiber-reinforced SiC composites to Ti-alloy brazed by Ag-Cu-Ti short carbon fibers显示文摘 | Lin Guobiao Huang Jihua Zhang Hong | 2007 | Journal of Materials Processing Technology2007，189，13： | 1 |
| 11 | Simulation of straight-line type assist characteristic of electric power-assisted steering显示文摘 | Shi Guobiao Lin Yi Zhang Xin | 2004 | SAE Paper2004，，： | 1 |
| 12 | Microstructure andmechanical performance of the brazed joints of Cf/SiC compositeand Ti-alloy using Ag-Cu-Ti-W显示文摘 | Lin Guobiao Huang Jihua Zhang Hua | 2006 | Science and Technology ofWelding and Joining2006，11，4： | 1 |
| 13 | Joints of carbon fi-ber-reinforced SiC composites and Ti-alloy brazed by Ag-Cu-Ti-short carbon fibres显示文摘 | Lin Guobiao Huang Jihua Zhang Hua | 2007 | Journal of Materials Processing Technolo-gy2007，189，13： | 1 |
| 14 | Microstructure and mechanical performance of the brazed joints of C1/SiC composite and Ti-alloy using Ag-Cu-Ti-W 显示文摘 | Lin Guobiao Huang Jihua Zhang Hua | 2006 | Science and Technology of Welding and Joining2006，11，4： | 1 |
| 15 | Brazed joints of Cf/SiC composite to Ti alloy using Ag-Cu-Ti-(Ti + C) mixed powder as interlayer 显示文摘 | Lin Guobiao Huang Jihua | 2006 | Powder Metallurgy2006，49，4： | 1 |
| 16 | Joints of carbon fiber - reinforced SiC composites to Ti - alloy brazed by Ag - Cu - Ti short carbml fibers 显示文摘 | Lin Guobiao Huang Jihua Zhang Hong | 2007 | Journal of Materials Processing Technology2007，189，13： | 1 |
| 17 | Joints of carbon fiberreinforced SiC composites to Ti-alloy brazed by Ag-Cu-Ti short carbon fibers显示文摘 | Lin Guobiao Huang Jihua Zhang Hong | | 0，，1： | 1 |
| 18 | A regulatory perspective on recombinant collagen-based medical devices显示文摘As a class of novel biomaterials manufactured by synthetic biology technologies,recombinant collagens are candidates for a variety of medical applications.In this article,a regulatory scientific perspective on recombinant collagens and their medical devices is presented with a focus on the definition,translation,classification and technical review.Recombinant collagens are categorized as recombinant human collagen,recombinant humanized collagen and recombinant collagen-like protein,as differentiated by specific compositions and structures.Based on their intended uses and associated risks,recombinant collagen-based medical devices are generally classified as Class Ⅱ or Ⅲ in China.The regulatory review of recombinant collagen-based medical devices aims to assess their safety and efficacy demonstrated by scientific evidences generated from preclinical and clinical evaluations.Taken together,opportunities as well as challenges for their future clinical translation of recombinant collagen-based medical devices abound,which highlights the essential role of regulatory science to provide new tools,standards,guidelines and methods to evaluate the safety and efficacy of medical products. | Wenbo Liu Hai Lin Peng Zhao Lina Xing Jie Li Zehua Wang Shan Ju XinLi Shi Yinghui Liu Gang Deng Guobiao Gao Lei Sun Xindong Zhang | 2022 | Bioactive Materials2022，7，6： | 1 |
| 19 | Joints of carbon fiber-reinforced SiC composites to Ti-alloy brazed by Ag-Cu-Ti short carbon fibers显示文摘 | LIN Guobiao HUANG Jihua ZHANG Hong | 2007 | Journal of Materials Processing Technology2007，189，123： | 1 |
| 20 | A novel natural circulation evaporative cooling system for super-high power intensity ECR ion sources显示文摘Cooling is very important for the safe operation of an electron cyclotron resonance ion source(ECRIS),especially when the window current density is very high(up to 11 A/mm2).We proposed an innovative cooling method using evaporative cooling technology.A demonstration prototype was designed,built and tested.The on-site test results showed that the temperature of the solenoids and permanent magnets maintains well in the normal operational range of 14–18 GHz.A simple computational model was developed to predict the characteristics of the two-phase flow.The predicted temperatures agreed well with the on-site test data within 2 K.We also proposed useful design criteria.The successful operation of the system indicates the potential for broad application of evaporative cooling technology in situations in which the power intensity is very high. | RUAN Lin XIONG Bin GU GuoBiao | 2016 | Science China(Technological Sciences)2016，59，4： | 1 |
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