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According to the mathematical model of a brushless DC motor, using MATLAB / Simulink to build various independent functional modules, and integrated into the simulation model of brushless DC motor control system. The system uses the double loop of control mode, including the inner current loop and the outer speed loop, to ensure that the motor is performance well in the high and low speed, and system...
Snore sound (SnS) data has been demonstrated to carry very important information for diagnosis and evaluation of sleep related breathing disorders with high prevalence, such as Primary Snoring and Obstructive Sleep Apnea (OSA) — a serious chronic sleep disorder with a big community. With the increasing number of collected SnS data from subjects, how to handle such large amount of data is a big challenge,...
Due to the constraints of satellite platforms and Inter-Satellite Links (ISL), very limited ISLs can be equipped on the satellites, making the ISLs intermittently available. Meanwhile, the Ground-Satellite Links (GSL) are also intermittent due to the rotation between the constellation and the earth. Intermittent connectivity of both ISLs and GSLs makes the satellite constellation network a typical...
Virtual catheter training system is a typical application of Virtual reality(VR) technology in the medical field. Doctors must operate catheters through experience accurately in traditional minimally invasive surgery(MIS) to ensure the safety of the operation. In order to improve the operation skills we proposed the force feedback-based robotic catheter training system. In this paper, we can obtain...
Amphibious spherical robots that achieve the correct navigation need to collect surround information and clear perception. In addition to equip various sensors, the robot collecting information can also rely on the video images, which include rich texture and information of color. In this paper, we present a video image mosaic method to collect surrounding information of the amphibious spherical robot...
As an advanced form of wireless sensor networks, directional sensor networks (DSNs) are used in a range of areas monitoring and surveillance applications. In this paper, we study sensor scheduling problems based on DSNs for subarea multi-demands of coverage, also called the $p$- coverage. With regard to different subarea coverage requirements $p$, the initial area is divided into small subareas and...
In this paper, we make a lot of research for the signal termination and crosstalk reducing methods, when the wearable device working in its particular working condition. Made an in-depth analysis of complex crosstalk signal analysis & match, in actually limited working condition. In this experiment, we made a Two-dimensional field analysis for the health monitor band's circuit board by using the...
The terrain defilade effect was utilized to propose a low altitude penetration 3D route planning method in consideration of blind space. Firstly, the digital elevation map and blind space model were established to obtain the terrain blind space range. Then, the blind space data was invocated in real-time in the planning algorithm. Lastly, A* algorithm was promoted and the planned route was smoothing...
In multi-robot cooperative control system where robots will complete a common task, it is significant to have a better communication among robots. This paper proposed a multi-robot cooperative control system for the spherical amphibious robot. The aim of this method is to set up a point to multipoint network which supports multiple robots link in. Moreover, Multi-robot cooperative control system is...
According to the world health organization survey, the number of patients died of disease of heart head blood-vessel per year up to 15 million, a serious threat to human health. Vascular Interventional Surgery (VIS) has been an effective method for treatment of vascular diseases. However, the surgeons are exposed to X-ray threatening the surgeons' health due to the depositing which lasts long. It...
The capsule microrobot will play an important role in the medical application such as the minimally invasive surgery in the future. In this paper, we proposed the spherical capsule robot system driven by the external magnetic field. And then we did the finite element analysis of the electromagnetic device involved in the system using ANSYS software. In the end, to verify our analysis results and establish...
In recent years, wheeled robots have get widely used and developed because of its advantages. But they also have some disadvantages, for example, they obviously can't be compared with the spherical amphibious robots on rough ground. The four-legged spherical amphibious robots can move quickly and smoothly on rough ground and have superior carrying capacity. This paper deeply analyzed the movement...
The rehabilitation exoskeleton robot is more and more used in the assisting stroke patients in implementing rehabilitation training. In this paper, a novel exoskeleton hand robot which was driven by cable has been proposed to aim at helping varieties of paralyses patients recover motor function. This exoskeleton hand rehabilitation robot system mainly consists of exoskeleton hand robot, EEG system,...
The exoskeleton robotic rehabilitation training system is a branch of the field of robotics, it is the external mechanical system that is consistent with the similar joints of the human body, and attached to the human body. With the development of exoskeleton rehabilitation robotic system, the biomechanics influence of device should be considered in rehabilitation training. This paper proposes a novel...
This paper proposed a novel muscle force evaluation method to evaluate the patient's rehabilitation condition in the process of rehabilitation training. According to the related literature research, the complexity of the electromyography (EMG) signals were different under different muscle force. The physiological features and the state of muscle can be indirectly speculated by detecting the change...
A novel piecewise model for pHEMTs with accurate Ids and its first three derivatives (gm, gm2 and gm3) is presented. The entire operating region is divided into several subregions. Aiming at improving the model accuracy in each subregion, the conventional Angelov models are developed with different optimized parameters. To solve the problem of the discontinuity between adjacent subregions, the artificial...
An automatic disturbance rejection control (ADRC)-based model predictive torque control (MPTC) strategy is developed for permanent magnet synchronous motors (PMSMs) fed by three-phase four-switch inverters. The model of a PMSM fed by a three-phase four-switch inverter is built firstly. Then the ADRC and MPTC are respectively designed. The resultant ADRC-based MPTC PMSM fed by an unhealthy inverter...
The reliability of RF/microwave power amplifiers (PAs) is key issue for the transceivers, since the PA is one of the most critical building blocks in RF front-ends of the wireless/mobile communication systems. To effectively evaluate the reliability of the RF/microwave PAs, it is essential to conduct specific reliability test, especially for the temperature, since temperature is considered to be the...
The broad range of applications to science prescribes the need for the complex permittivity (εr=ε′-jε″) and permeability (μr=/μ′-jμ″) of many emerging materials. Unfortunately, due to the strong absorption across the entire microwave and millimeter wave spectrum there are gaps in available permittivity data for many materials over the millimeter-wave regimes. Here two attempts are made to fill a portion...
Reasonable ratio of air to fuel is an important measure to ensure combustion efficiency for rolling reheating furnace, the optimization of which in the real operation is more like art than science. The target of energy saving can be achieved by adjusting air-fuel ratio according to online measured combustion state. However, in most engineering application, only atmosphere in gas flue is detected for...
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