A5101737636- Iterative Learning Control Systems
- Piezoelectric Actuators and Control
- Optical Systems and Laser Technology
- Advanced Measurement and Metrology Techniques
- Advanced Sensor and Control Systems
- Industrial Technology and Control Systems
- Advanced Surface Polishing Techniques
- Force Microscopy Techniques and Applications
- Advanced MEMS and NEMS Technologies
- Advanced Algorithms and Applications
- Control Systems in Engineering
- Electric Motor Design and Analysis
- Gear and Bearing Dynamics Analysis
- Image and Video Stabilization
- Advanced Control and Stabilization in Aerospace Systems
- Hydraulic and Pneumatic Systems
- Teleoperation and Haptic Systems
- Advanced Measurement and Detection Methods
- Mechanical Engineering and Vibrations Research
- Soft Robotics and Applications
- Advanced machining processes and optimization
- Image Processing Techniques and Applications
- Adaptive Control of Nonlinear Systems
- Geoscience and Mining Technology
- Control and Stability of Dynamical Systems
National University of Defense Technology
2015-2025
Imperial College London
2025
Chinese Academy of Medical Sciences & Peking Union Medical College
2025
Peking Union Medical College Hospital
2025
Beijing Aerospace Flight Control Center
2023
Fast steering mirrors (FSM) are widely used in high precision image stabilization system, which beam adjustment can be realized to enhance the quality of system. mirror is usually fixed optical path and direction changed by adjusting attitude mirror, so as adjust position on imaging platform. Based theory coordinate transformation law light vector reflection, relationship between platform FSM. Shift rotation studied meanwhile. The kinematic model shift high-precision system established,...
Ultrasonic motor (USM) combines piezoelectric actuator with friction drive, and there is a non-negligible speed fluctuation. The pulsation of the rotating affects stability accuracy ultrasonic motor. In order to describe inherent characteristics fluctuation characteristics, this paper first analyses error source eccentric inclination shaft relative stator, tests rotor under different parameters in comprehensive experimental device driven by multiple parameters. Finally, results are analysed...
Super-resolution imaging technology is essential for precision optoelectronic equipment, including reconnaissance satellites, guidance seekers and airborne pods to enhance image resolution. The micro-scanning actuator achieves sub-pixel level scanning through precise fixed-point micro-motion, rapidly accurately collecting multiple low-resolution frames, which are then synthesized into higher-resolution images. Given the harsh operating environments extremely limited installation space, these...
The fast steering mirror driven by a voice coil motor is key electromechanical servo component in modern precision imaging and image stabilization systems. has high response bandwidth prone to torque ripple caused switching noise when using PWM driver, which turn leads small oscillations of the reflector, limiting its contro l accuracy resolution. Reducing output current driver satisfy requirements control one issues design high-precision drivers. switch through LCCR filters an effective way...
Micro-positioning stages, capable of fine orientation adjustment for manipulation light paths, play an important role in micro-scanning imaging systems. However, conventional electromagnetic actuators and guide flexures are unsuitable compact opto-electromechanical In this paper, a novel micro-positioning stage driven by with active decoupling design is proposed. Actuators moving permanent magnets have been designed employed, providing high torque 3 degrees freedom the working plane....
Abstract Introduction This study protocol specifies the primary research line and theoretical framework of 2024 Survey Psychology Behavior Chinese Population. It aims to establish a consistent database residents’ psychological behavioral surveys through multi center large sample cross sectional provide robust data support for developing in related fields. will track public’s physical health more comprehensively systematically. Methods The was conducted from June 23, September 29, 2024, using...
To investigate the clinical features and treatment outcomes of anti-leucine-rich glioma-inactivated 1 (anti-LGI1) encephalitis in patients with SLE. Between October 2014 April 2024, serum or cerebrospinal fluid samples were collected from 332 SLE suspected autoimmune encephalitis. Cell-based assays used to detect antibodies, including anti-LGI1 antibodies. Four tested positive for their clinical, radiological data analysed. All four exhibited signs limbic encephalitis, short-term memory...
Abstract. This article proposes a novel monolithic compliant spatial parallel XY stage (SPXYS). An important feature of the SPXYS lies in that it can deliver centimeter travel range and sustain large out-of-plane payload while possessing compact structure, which makes suitable for some special applications such as Ultra-Violet Nanoimprint Lithography soft-contact lithography. Different from conventional positioning stages, proposed consists linear mechanism (SPLCM) driven by four matching...
Abstract Micro-stepping motion of ultrasonic motors satisfies biomedical applications, such as cell operation and nuclear magnetic resonance, which require a precise compact-structure non-magnetization positioning device. When the pulse number is relatively small, stopping characteristics have non-negligible effect on entire stepwise process. However, few studies been conducted to show rule open-loop motion, especially shutdown stage. In this study, modal differences stage are found...
Since most of XY positioning stages with large travel range proposed by former researchers suffer from loose structure and low out-of-plane payload, this article presents a novel monolithic parallel stage based on spatial prismatic–prismatic joints centimeters range, compact size, high payload capacity. The linear compliant mechanism the is composed four joints, which two compound leaf spring parallelograms serially connected in cubical space to obtain travel, capacity simultaneously....
In this paper, we propose a one-finger nonprehensile manipulation strategy for repositioning and reorienting 3D object in frictional environment. The proposed consists of the periodic searching pushing modes robotic finger. mode, finger starts from its initial configuration searches start-to-push point on surface. manipulability distribution can be quickly evaluated by defining three factors reflecting continuous distance, contact force transmissibility, demand object. is planned to drive...
Limitations of beam steering in Risley prisms, induced by total internal reflection, are investigated for the four typical configurations. The incident angles at exit surfaces double prisms calculated nonparaxial ray tracing and compared with critical angle. On this basis, limitations opening angle, relative orientation deviation power system derived. It is shown that reaches its extreme value when increase to a certain limit given prism material. As exceed value, prisms' limited. With...
In the harmonic gear servo system, friction is associated with not only velocity of input shaft but also its angle position. Traditional compensation based on cannot guarantee high motion accuracy. To address this problem, article proposed a new model which related to both and The includes two parts: in presliding region, static determined by maximum elastic deformation recovery shaft, sliding has Stribeck effect from series relative shaft’s article, parameters were obtained preliminary...
With the advantages of high resolution, structural simplicity, reliability, compact size, and sensitivity, inductive sensors have been widely used in nanopositioning systems. However, measuring range traditional are usually limited to 0.2 mm. A novel analysis design methodology miniaturized sensor with large nanoscale resolution is proposed. Firstly, an accurate leakage inductance model established. Secondly, a rule armature size proposed by considering fringing effect. Then, error terms...
In this article, a decoupling control method is proposed to solve the coupling problem of differential cable drive inertially stabilized platform. First, transmission chain and motion platform are briefly illustrated, dynamics analysed based on Lagrange equation. According established dynamic equation, inertia, torque angular position between two motors analysed. Then, controller used address problems, numerical simulation realized in MATLAB/Simulink. The experimental results show that...
In this paper, a composite control method combined finite-duration impulse-response digital (FIR) filter and an additional feedback of the difference between motor load speeds is proposed to suppress vibration. The structure analysed, where FIR used resonance compliant buffer shelf, harmonic gear tram. Simulation results validate algorithm.