A5084487865- Hydraulic and Pneumatic Systems
- Prosthetics and Rehabilitation Robotics
- Robotic Locomotion and Control
- Soft Robotics and Applications
- Vehicle Dynamics and Control Systems
- Robot Manipulation and Learning
- Dynamics and Control of Mechanical Systems
- Control Systems in Engineering
- Hydraulic flow and structures
- Target Tracking and Data Fusion in Sensor Networks
- Water Systems and Optimization
- Iterative Learning Control Systems
- Brake Systems and Friction Analysis
- Space Satellite Systems and Control
- Gas Dynamics and Kinetic Theory
- Real-time simulation and control systems
- Electric and Hybrid Vehicle Technologies
- Advanced Sensor and Control Systems
- Soil Mechanics and Vehicle Dynamics
Yanshan University
2019-2025
Space Engineering University
2018
In this paper, the mathematical model of aviation pressure servo valve controlled actuator system(APSVCAS) considering nonlinearity is established based on a jet pipe in article. And dynamic characteristics and stability boundary APSVCAS are analyzed, which provides theoretical guidance for actual composition determination parameters. Firstly, jet-tube two-stage hydraulic system designed, an accurate multiple nonlinear factors. Meantime, influence 34 parameters analyzed by using second-order...
A hydraulic pipe is a basic component of the aero system, while high pressure and speed lead to enhancement multiple field coupling effects, such as structure, fluid, heat, sound pipe. larger elastic deformation more common unsteady flow fluid can aggravate vibration noise system. Based on 14-equation model fluid-structure-interaction (FSI) pipe, suitable for wide Reynolds number range proposed by comparing analyzing various kinds friction models. This used FSI dynamic behavior analysis...
The joint hydraulic drive unit (HDU) serves as a pivotal element in enabling the high-performance movements of legged robots. Functioning conduit linking oil source and actuator, flow channel significantly impacts actuator performance. Hence, optimizing HDU becomes imperative, enhancing not only efficiency but also overall system This paper introduces novel approach by aligning with arteriovenous layout cardiac vascular system, departing from conventional machining model. Through simulations...
Each joint of hydraulic drive legged robot adopts highly integrated electro-hydraulic servo system, and the system has two common forms, namely, valve-controlled cylinder pump-controlled system. The former a large energy loss, which restricts endurance in field. Although latter advantages saving high efficiency, overall response ability control is unsatisfied. In this paper, novel pump-valve compound (PCDS) designed. It combines can not only effectively reduce loss but also ensure ideal...
This paper takes the position control performance of pump-controlled hydraulic presses as research object. The methods are designed respectively for two motion stages rapid descent and slow in order to improve system. First all, accuracy model servo system (the system, which is called PCHPS) its MATLAB/Simulink simulation platform established. Based on theoretical analysis experimental data, interference factors affecting tracking positioning PCHPS analyzed. Then, an adaptive integral robust...
In order to estimate the motion state of hypersonic glide vehicle, a model based on aerodynamic parameters prototype CAV-H and an observation GEO infrared early-warning satellite were established. The exponential weighted recursive least square method with forgetting factor was used measure data measuring error in angle obtain fitting parameter describing polynomial target state, can focus local target, dilute influence early parameters, reduce estimation caused by manoeuvring. simulation...
Wheel braking devices is some of the most widely used landing deceleration in modern aircraft. Jet pipe pressure servo valves are large aircraft wheel brake control systems because their high anti-pollution ability, sensitivity and fast dynamic response. However, suffer vibration phenomena during process. The valve an important part hydraulic system, also factor affecting system. In order to solve problem system this paper present a two-stage design. We place feedback channels at both ends...
The hydraulic drive unit (HDU) applied in a legged robot joints adopts an outer loop impedance control method based on the control's inner during motion so that entire system obtains certain compliance characteristics. There are two types of loops, namely, position closed and force control; this paper studies which is improves its accuracy order to provide references for control. Therefore, designing compensation has important research significance. In view above significance, first deduces...
In this article, the hydraulic drive unit that drives movement of joint a legged robot was researched, aiming at improving control accuracy position-based impedance system with dual input and single output. The state feedback containing more information adopted to replace traditional output proportional-integral-derivative (PID) control, through real-time calculation time-varying parameters servo valve flow, nonlinear space expression derived, matrix transformation amplifier were obtained...
The wheel brake device is one of the most widely used landing deceleration devices in modern aircraft. For large aircraft, a multivalve parallel system usually used. When pressure servo valve certain type aircraft debugged, output shows obvious periodic oscillation with constant amplitude. This paper focuses on valve, which key component system. There are number feedback and adjustment segments can not only improve control accuracy but also introduce nonlinear factors to cause vibration....