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We aimed to construct an ideal speech production substitute for patients with phonation disorder and developed the artificial larynx by using piezo-vibrator as the sound source. To develop this artificial larynx, we investigated the control method using the electromyographic (EMG) signal of human neck muscle. A previous research study confirmed that the EMG signal of the sternohyoideus is effective...
Integrating repetitive control and RBF neural network PID control , a novel control scheme for DC servo system is proposed for the high accuracy of Oscillating Mirrorsystem . The repetitive control is used to improve the steady-state characteristi of the control serosystem and enhance its ability to withstand the disturbance with same frequency; the RBF neural network PID control is used to enhance...
The article proposes a new type of short-range wireless information transmission equipment. It is mainly composed of a transmitter and a receiver. The transmitter and the receiver all use the high integrated and high performance single chip solution. The transmitter is only composed of pure hardware. It features simple structure, stable performance and simple debugging. The receiver not only has simple...
An ac voltage regulating system of doubly Salient Electro-magnetic Generator has been performed in this paper. In order to maintain the high voltage 360VDC stable, the dual boost converter with fixed frequency PWM controlled is adopted. Three-phase dual buck inverter was adopted to output 115VAC/400Hz. the generating system configuration, control strategy of dual boost converter and three-phase dual...
Microgrid has lots of advantages and effective methods in usage and control of DGs, and has developed rapidly at each country. Electric Vehicles regarded as new traffic method has been paid more common attention. Batteries of electric vehicles can be regarded as mobile power storage devices, which will affect the stability of the power grid when paralleled in the grid. A common structure of the microgrid...
The main purpose of this paper is to design a pulse-width-modulated (PWM) pulse power supply to test the performance of the solenoid valve. In order to achieve this purpose, from hardwave stage, one of the main part of designing is to use a microcontroller unit (MCU) as the core in the control system cooperating with the functional generator chip MAX038 and SG3525 to output the desired PWM waveform...
To improve the effect of existing inter-area oscillation control system in wide area network and multi-Agent system, the paper presents the control collaborative model of the inter-area oscillation based on multi-Agent and PMU for solving the problems presently such as centralized control and delay of wide-area power system in the control mode of the inter-area oscillation. It designs the monitoring...
In this paper, a program-controlled current source system which is based on direct digital frequency synthesis technology has been proposed. The system adopts PIC16F877 microcontroller as the control center, chooses the AD9850 chip to achieve the program. Through closed-loop design, software use discrete incremental digital PID algorithm to realize precise control of output current system of small...
By analyzing luminous process and volt-ampere characteristics of gas discharge lamp, a piecewise linear regress mathematical model is proposed. An illuminated loop-locked intelligent adjust light controller is designed by using power switching devices and SPWM variable voltage variable frequency controlling means. The above design can modify pulse and control carrier-to-noise ratio. Within a certain...
In order to eliminate steady-state errors and chatter caused by quantization error of the conventional fuzzy controller, based on the self-adjustment of quantified proportionality factors fuzzy controller, this paper establishes the flexible fuzzy controller, and can achieve the online parameters self-adjusting function. This method is used in inflation process of pneumatic membrane structure, which...
The paper introduces a new type of coal chemical industry, the automatic coal blending network system. The system includes the field automation production center and the centralized monitoring control center. The field automated production center uses the PROFIBUS-DP protocol to build a network, connect every controller to form the control network, through obtaining the flux feedback value of nuclear...
A 5V, 0.6μm CMOS phase locked loop (PLL) is presented. The circuit design of the PLL, which consists of a phase-frequency-detector (PFD), charge-pump (CPP), bias-generator (BG), voltage controlled oscillator (VCO) and differential to single converter (DSC), is introduced and the simulation results are given. The details of design theory and calculation are also described. The PLL is integrated in...
This thesis mainly divide into two parts - hardware and software. The new system with additional frequency hopping function is based on traditional FM system. Also, it proves the correctness and feasibility of the design, and provides important technical instance to it.
This paper describes a fuzzy control system and simulation for ultrasonic motors. Although ultrasonic motor has much merit, such as small size, light weight, high precision, fast control dynamics and large driving force when low speed, etc. However, the nonlinear dynamic characteristic and the accurate mathematical model is difficult to obtain. So the traditional control method is almost no effect...
The use of an adaptive feedback canceller (AFC) based on signals pre-whitening/filtering in hearing aids seems very attractive, since it limits desired signal degradation when amplification gain is increased. In this paper, we present a comparative assessment of the performances of some existing pre-whitening decorrelation based methods. The used criteria consider the adaptive filter performances,...
This paper introduces a novel rendezvous protocol (RAC2E) for dynamic control channel provisioning among cognitive radios in a decentralized and cooperative ad-hoc environments. Unlike previous work in the field, RAC2E does not require synchronization in the radio environment. Its main characteristics are lightweight design and scalability. The paper elaborates RAC2E operation, gives a numerical analysis...
Recently, various wireless networks are emerging and it leads to spectrum congestions. Cognitive radio, which allows users of the emerging wireless networks to opportunistically utilize the unused bands of the existing primary systems, can alleviate this problem. As one of the emerging wireless networks, 802.16 networks are suggested to explore TV “White Space” and then it is necessary to study cognitive...
This paper addresses the problem of sharing primary frequency control reserves among non-synchronous AC systems connected by a multi-terminal HVDC grid. We focus on a control scheme that modifies the power injections from the different areas into the DC grid based on remote measurements of the other areas' frequencies. This scheme is proposed and applied to a simplified system in a previous work by...
This paper presents a methodology to make EV able to contribute to secondary frequency regulation, by participating in Automatic Generation Control (AGC). The aggregator entity is used in this methodology to act as intermediate between the AGC and the EV controllers. The case-study used is an approximation of the Portuguese transmission/generation network, including existing tie lines with Spain,...
Herein, the concept of an ancillary service manager is developed for the provision of additional control reserve capacity. The aggregating entity clusters time-varying, aggregated battery capacity from plug-in hybrid electric vehicle (PHEV) fleets and power reserves from conventional generators. It is shown that providing additional control reserve capacity from time-varying sources such as PHEVs...
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