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This study, which examined five healthy young male subjects, was intended to evaluate wheelchair adaptability based on physical and mental loads. Joint torque and muscle energy consumption of the upper limbs were used as indexes of the physical load. Salivary α-amylase activity (sAMY) was used as an index of the physical and mental loads. To examine the influence of the driving resistance and wheelchair...
A critical problem facing the mechanical design community is that of bridging the gap between mechanical CAD data and finite element models.In this paper, We developed a 2D finite element analysis (FEA) data creating system in which the data is generated from DXF (drawing interchange file) data, which is one of the most famous CAD data. The system is proposed and the usefulness of the system is clarified...
The basic advantage of stepper motors over other types of motors is that it can be driven by digital and open-loop control. However an open loop control shows a poor dynamic performance and is insufficient in precise motions which require a high dynamic, so a closed loop control is required. This paper describes field oriented control which will improve the dynamic performance of the Hybrid stepper...
It is a timeless and actual problem to develop vehicle's active safety. In case of commercial vehicle category more sophisticated difficulties could be found. Increased mass and inertia are the fundamental differences between a usual passenger car and a truck. At the same time, the low series number requests cheap solutions. The aim is in this way to ensure low cost solutions to control increased...
The paper presents aspects concerning the modeling, driving scenarios and control structures of two classes of vehicular power train systems with continuously variable transmission (CVT). The modeling includes an analysis of the systems' components which include the spark-ignition internal combustion engine, the torque converter, the continuously variable transmission and the wheels. The CVT offers...
This article takes the two-stage screw type solar array which has multi-deployment and lock function as a study object, and simplifies the joint hinge as rotation vice according to the transmission order of multi-deployment and lock joint hinge. Based on the kinematics characteristic analysis of solar array's deployment and the Kane dynamic equation, the dynamics analysis model of solar array's deployment...
The main aim of this paper is to design a hybrid force-position controller using fuzzy logic (FL) for the robotic arm of a 9 degrees of freedom (DOF) upper limb wearable exoskeleton rehabilitation robot. The robot is designed and built in our lab for assisting in the rehabilitation of patients post-stroke. The robotic arm of the rehabilitation robot is driven by pneumatic muscles (PM) and its dynamic...
The mathematical models of hydraulic braking system were built through studying the braking system of the wind turbine. The AMESim software was used to establish the simulation model of hydraulic braking system and the controller model, which was employed to the coupling of the simulation, constructed in Matlab/Simulink. The designed soft braking system was tested in the wind turbine. The analysis...
In order to achieve sensorless control for permanent magnet synchronous motor (PMSM), an observer based on model reference adaptive system (MRAS) is designed to estimate the rotor speed according to the mathematic model. A speed sensorless vector control system is established and simulated with Simulink. Simulation results show that the MRAS-based control system, which is able to implement the speed...
To maintain the stability of the vehicle and to guarantee the traction performance, an acceleration slip regulation (ASR) system is proposed for a front-axle drive electric passenger car. The control strategy of ASR based on the ASR system mentioned above is developed, which is realized in MATLAB/Stateflow. In order to study the characteristics of the ASR system better and to evaluate the performance...
A novel doubly salient permanent magnet motor named flux switch permanent magnet motor (FSPM) was designed and analyzed. The stator and rotor of FSPM are all salient structures. There are a marked verge domino effect and serious saturation phenomenon. Due to high nonlinearities of FSPM, finite element method (FEM) was used to analyze magnetic field distribution, permanent magnet flux linkage, electromotive...
A testing device for torque extraction generator based on IPC is presented in this paper. It may be automatic and manual operating. Its hardware adopts industry PC, multifunction cards, communication card, kinds of sensor and electric equipment. The brushless dc motor is adopted as the drive electrical machinery. Its software is Windows XP and LabView technology. It can measure voltage, current, power,...
The mathematical model was presented for the servo loading system with secondary regulation. Control performance under the disturbance of hydraulic and mechanical coupling was simulated with MATLAB. Simulation reveals that increasing of load pressure, output torque and rotational speed may deteriorate control precision. Load pressure fluctuation causes more influence on torque control system than...
For the system of macro micro-feed table, deformed guide rail joints is designed using of flexible hinge. The 2D stiffness matrix is derived from principle of minimum potential. And the stiffness matrix is applied to micro-feed table which contains deformed guide rail joints. The simplifying computation model of the micro-feed table is obtained. The results of simplifying model are compared with finite...
This paper deals with the trajectory planning of a full-rotate parallel robot for wafer transfer operations. With the path length in work space of the robot as parameter, the dynamic model is parameterized. The system constraints-input torque and velocity constraints and the task constraints-output velocity, acceleration, and jerk limits are set; with the minimized operation time as the optimization...
This paper presents a specific simulation modeling of a hydraulic system with regenerative braking used to improve vehicle emissions and fuel economy. To optimize the bus integrated performance, an exact modeling of hydraulic component has been built up in Matlab/Siumulink. The simulation has been run on both designated parameters and CYC-UDDS drive cycle. At last, experiment results show that the...
As an economic, quick, effective pavement preventive maintenance (PPM) technology, Micro-surfacing Treatment is playing the very important role in Chinese for developing highway today. The article unified the domestic and foreign experimental regulations and the literature related to micro-surfacing, took Liaoning Province Shen-Shan highway preventive maintenance item as the backing, made the comprehensive...
Because of the higher efficiency, higher power factor, higher power density and better dynamic performance, there is ever increasing attention to applying permanent magnet synchronous motors (PMSM) to traction system. In this paper, the parameter selection of the permanent magnet traction drive motor (PMTDM) was carried out. Some useful conclusion was obtained. At last, a motor design program was...
A novel neural network, retina neural network (RNN) is put forward, and its definition, network structure, parameters, and characteristic are presented. After training it using a set of samples, an ideal training waveform is obtained, which is a great guide for future research. Moreover, a model of permanent magnet synchronous motor (PMSM) PI controller is constructed based on RNN to test drive performances...
The stator flux observer is a key part in the method of Direct Torque Control (DTC). However, the accuracy of the stator flux estimation directly affected the performance of DTC. The traditional induction motor stator flux observation method have been analyzed in This paper. And for the Shortcomings of existing methods, a on-line identification methods based on Radial Basis Function(RBF) have been...
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