Circuit Control System Research Articles

Development and Motion Mode Analysis of IPMC Bionic Jellyfish Based on App Bluetooth Remote Control

This paper mainly studies a kind of bionic jellyfish driven by IPMC remote control based on mobile APP. The bionic jellyfish has four bionic tentacles made by IPMC. The shell preparation, internal circuit connection and control system design process of bionic jellyfish are introduced. Finally, the paper discusses the implementation of the bionic jellyfish first-class fixed-speed cruise, secondary fixed-speed cruise, acceleration, deceleration, and steering modes.

Research and Development of Automatic Monitoring System for Livestock Farms

In this study we have developed an automatic monitoring system based on wireless communication networks in both dairy and pig farms to replace traditional manual data collection of the environmental conditions and manual controls of fans and water control valves in livestock farms to solve the man-power shortage problem for livestock farming. Firstly, sensors for detecting temperature, humidity, illumination, wind speed and the control circuit and communication system were installed. The monitoring programs were subsequently designed to transmit the data back to the user interface display of the office through RFU-400 wireless communication modules, and the data collected from the farm environment have been stored in a database for data analysis. Finally, the fans and water spray valves have been automatically activated duly to improve the temperature and humidity of the livestock farms. We analyzed the data collected from the sensors with regard to the lactation yields for dairy cows, and suggested optimized environmental parameters for dairy cows to increase their appetite and lactation yield, or increase the feed conversion rate of the pigs. We expect the process and results of this study can result in helpful reference to livestock farming, and help to achieve the best economic benefits in raising cattle, pigs and so forth.

Development of a 10-kV regional compensation dynamic voltage restorer with multiple functions

ABSTRACTThe first 10-kV regional compensation dynamic voltage restorer (DVR) has been installed in a 110-kV substation in Shenzhen power grid, to protect plenty of sensitive loads in a wide area simultaneously from the disturbances caused by voltage sags. The location selection and performance indicators of the DVR are determined based on the voltage sag statistic results in recent years of Shenzhen power grid. The implementation schemes of main circuit elements, such as the energy storage unit, inverter and LC filter are presented. To further improve the DVR’s cost-effectiveness, a novel virtual impedance control strategy is proposed to provide the DVR with a function of a Fault Current Limiter (FCL) or a Series Compensator (SC) besides the function of voltage sag compensation. Simulation and field experimental results are provided to show the correctness and effectiveness of the main circuit design and control system development of the 10-kV DVR.

Energy Saving Oriented Improvement of Public Lighting Circuit System in Wisdom Classroom

According to the existing problems of the public lighting control circuit in classroom, we improve the lighting control circuit system by using the single chip microcomputer. On the premise of not changing the layout of classroom lamps, the existing lighting control circuit is updated from one row one control to one lamp one control. Depending on the actual light in the classroom, it is decided whether or not and in which position the lights need to be turned on. The intelligence of the public lighting facilities is an important part of the intelligent campus.

Mass balance control of crushing circuits

This paper describes a novel circuit-wide control scheme that addresses the challenging problem of mass balance control of crushing circuits. The control objective is to ensure 100% utilization at the circuit bottleneck and hence push the realized performance towards the theoretical maximum. The present control problem is challenging due to long transport delays, complex circuit layout, under-actuated process, several uncontrolled disturbance flows, varying number of active equipment, varying downstream demand, and changing bottleneck location.The proposed mass balance control scheme involves feeding the circuit according to actual demand and realized circuit throughput, whilst maintaining the amount of material accumulated into the circuit and ensuring the physical integrity of the circuit. Therefore, the circuit feeding is based on the realized processing capacity, rather than an individual bin level or an operator decision. To ensure the efficient use of available surge capacity, a limiting control structure is proposed to simultaneously realize the in-circuit multi-objective limit violation control and loose bin level control strategy. The proposed scheme offers a simple solution for the otherwise complex control problem, which can be easily and efficiently implemented using classic control methods.The paper details an entire design procedure, from the fundamental theory, through dynamic modeling and controller tuning, to the complete circuit control system design and implementation. The proposed scheme is evaluated under extensive full-scale and simulated experiments at various production scenarios and equipment combinations. The rigorous control experiments revealed that the proposed scheme delivered the desired behavior in every possible scenario. This enables the circuit to reach its true potential.

Microcontroller Based Circuit Protection and Control

The automated microcontroller-based circuit protection and control system is integrated with IoT element, which consisted of both hardware software components, and communication devices. The designed system is to acquire the electrical parameters such as current and voltage as well the power consumption using sensors. ThingSpeak is engaged, mainly used to acquire data from the microcontroller via wireless communication, to further analyse and visualize it in the required form and sends SMS notification to the user through Wi-Fi, such as over/under current, over/under voltage, & excessive power consumption, depending on the data analysis. Once user received notification, remedial action can be further taken to isolate faulted part from circuit, or to take desired action for safety purpose. The designed prototype is enhanced circuit protection (automated), incorporating data storage, monitor/control of electrical loads intelligently and offers user safety and security of the electrical operation.

Design of PID Coprocessing Module for CPT Atomic Clock Control SoC

The CPT (Coherent Population Trapping) atomic clock is very small because there is no microwave cavity. However, the circuit control system is becoming the constraint of further miniaturization of CPT atomic clock. The CPT atomic clock control SoC integrates control related circuit into a single chip. There are many control loops in the CPT atomic clock which require PID (Proportional-Integral-Derivative) algorithm. CPU in this SoC can not afford the computation of PID algorithm. So a PID coprocessing module is integrated into this SoC. The PID algorithm can be decomposed into multiply-add operations. The coprocessing module mainly consists of a multiply-add module. Compared with SoC without PID coprocessing module, SoC with this module can reduce the time of calculating PID algorithm to 24.808%, and the area consumption increases by only 8.89%.

Design of unmanned airplane scheme (UAS) energy system

Forthcoming Unmanned Airplane Schemes (UASs) are anticipated to be approximately self-sufficient and constituted of various Unmanned In-flight Mediums. However, present investigation concentrations on UAV avionics and mechanism procedures, powdered assignment computerization has arisen notification of scholars. Meanwhile, the cleanest energy such as solar power is considered as one of the major driver serve energy for the UAS energy systems. And in order to enlarge the UAS manoeuvre capacity as well as releases humanoid operatives, advance scheme reportage and facilitate procedure in dangerous surroundings. In this paper, we recommend switch power control system, main circuit control system and secondary circuit control system to estimate the coverage of a prearranged UAS.

Study of an adaptive energy harvesting system for high voltage piezoelectric generators

An adaptive energy harvesting system for high voltage piezoelectric generators is presented in this paper. Maximum power point tracking scheme is applied in the adaptive system. Low-power-consumption schemes are applied in the control system and harvesting circuit. A self-startup circuit is also applied to the system. Theoretical analysis was explored to determine optimal parameters for the harvesting system. Experiments were done to verify the theoretical analysis. The experimental results show that the harvesting system can achieve an efficiency of 17.5 ∼ 73.3% for piezoelectric generator with a peak open-circuit voltage of 6 ∼ 20 V. And the harvesting system can be self-powered from low input power as 25 μW. The average power consumption of the microcontroller can be low as 3.5 μW.

Development of Electro - hydraulic Control Platform for High Speed Slipper Pair Friction Test Machine

In order to reveal the friction and wear properties of the high-pressure axial piston pump sliding shoe, the paper designed the electro-hydraulic control platform for the performance test of the sliding shoe according to the requirements of the side structure and performance testing of the shoe. This platform includes the hydraulic system design and circuit control system development. The simulation results show that the hydraulic system is simulated by AMESim, and the open and closed loop comparison curves are obtained. Based on the PLC language platform, the circuit control program is written, which can make the electro-hydraulic control platform improve the test results of the slipper pair friction performance. At the same time, this platform also provides a solid hardware support for the study of the friction performance of the slipper pair.

Structural design of giant magnetostrictive actuator

Structural parameters of giant magnetostrictive actuator (GMA) have a greater impact on its output characteristics and how to design them is related to give full play to the material characteristics. On the basis of analyzing working principle of GMA, this paper respectively designs and optimizes the structural parameters of exciting coil, magnetic circuit, preload device and temperature control system. The initial best working conditions are achieved by research on static experiments. The experiment results show that this GMA has better static and dynamic output characteristic, which further improves GMA design theory and expands its applications.

(Vittorio de Nora Award Address) New Tools for Brain Research

At the system level neuroscience is trying to understand how neural circuits work in learning, memory, multisensory integration, motor coordination and how the electrochemical function of these circuits is compromised in the case of disease. Diseases that involve the nervous system are highly complex and mostly not well understood. The Global Burden of Disease Study 2010 (GBD 2010), estimated that a substantial proportion of the world’s disease burden came from mental, neurological and substance use disorders. We need new tools and methods at the system level to effectively tackle these conditions and to better elucidate brain function and disease. One such tool is a novel cognitive computing platform, IBM's TrueNorth chip, that enables the use of deep learning techniques in an ultra-low power environment. We have used deep learning with a convolutional neural network (CNN) and TrueNorth technologies for real-time analysis of brain-activity data at the point of sensing. This approach has the potential to create true closed-loop insights (analytics) and therapies for next generation of wearable and implantable devices at the intersection of neurobiology and artificial intelligence. Neurotransmitters are small proteins secreted between neurons to facilitate neural communication. These compounds are key to information processing during behavior. However, until recently, this chemical communication had not been characterized because biosensors suitable to monitor sub-second chemical events in micron dimensions were unavailable. Cyclic voltammetry at carbon-fiber microelectrodes provides measurements with sub-second time resolution and has been used to examine the dynamics of neurotransmitter concentrations. To enhance the sensitivity and the selectivity of these measurements, we have developed polymeric coatings for bare carbon electrodes. Dopamine, serotonin and adenosine are neurotransmitters that were measured with this methodology. Another tool that we have developed is a novel nanoscale electrode array with superior sensitivity and improved spatial resolution which can be used in the future to gain improved understanding of dopamine dysregulation. We report on the scalable fabrication of dopamine neurochemical probes of a nanostructured glassy carbon that is smaller than any existing dopamine sensor and arrays of more than 6000 nanorod probes. Compared with a flat glassy carbon surface, the nanostructured glassy carbon nanorods provide about 7X higher signal per unit area (current density) for dopamine sensing. The glassy carbon nanorods were fabricated by pyrolysis of a lithographically defined polymeric nanostructure with an industry standard semiconductor fabrication infrastructure. The scalable fabrication strategy offers the potential to integrate these nanoscale dopamine rods with an integrated circuit control system, with other sensors and with different modalities of neural activation.

Depth perception based on omnidirectional ring structured light

A depth perception method based on omnidirectional image and ring structured light is proposed. Firstly, a new omnidirectional ring structured light pattern (ORSL) was presented. ORSL can simplify feature point extraction and locate the scene position more robust and fast. Secondly, a new sensor is proposed, which including an omnidirectional camera, laser projector and control circuit system. Thirdly, measurement accuracy was improved on error correction methods. Finally, a pose estimation method is designed to compute the location and direction of the imaging system. The experimental results demonstrated that the proposed method can acquire omnidirectional depth information about large-scale scene. The error analysis of multiple sets of depth data show the effectiveness of the method.

Broadband acoustic phased array with subwavelength active tube array

Acoustic metasurfaces provide a way to manipulate wavefronts at anomalous reflection or refraction angles through subwavelength structures. Here, based on the generalized Snell's refraction law for acoustic metasurfaces and the classical acoustic phased array (PA) theory, a broadband acoustic PA with a subwavelength active tube array has been proposed to form a special acoustic beam and to determine the directivity characteristics of the acoustic source. Theoretical analysis shows that the dispersionless wavefront manipulation can be realized by the gradient model of the active tube array, and a wide working frequency band can be obtained in practical applications from the simulated and experimental results. The numerical results of forming a special acoustic beam and establishing an acoustic focus model with an arbitrary focal position are consistent with the theoretical predictions. The experimental results agree well with the simulated results in the model of forming the acoustic beam of 45°. By combining acoustic metamaterials and conventional acoustic PA, the model of the active tube array paves a way to design a composite acoustic PA with high radiation efficiency and system robustness without the need for any complex circuit control system. This design concept is expected to be used in the design of ultrasonic therapy devices and high-efficiency transducers.

Scalable Nanostructured Carbon Electrode Arrays for Enhanced Dopamine Detection.

Dopamine is a neurotransmitter that modulates arousal and motivation in humans and animals. It plays a central role in the brain "reward" system. Its dysregulation is involved in several debilitating disorders such as addiction, depression, Parkinson's disease, and schizophrenia. Dopamine neurotransmission and its reuptake in extracellular space takes place with millisecond temporal and nanometer spatial resolution. Novel nanoscale electrodes are needed with superior sensitivity and improved spatial resolution to gain an improved understanding of dopamine dysregulation. We report on a scalable fabrication of dopamine neurochemical probes of a nanostructured glassy carbon that is smaller than any existing dopamine sensor and arrays of more than 6000 nanorod probes. We also report on the electrochemical dopamine sensing of the glassy carbon nanorod electrode. Compared with a carbon fiber, the nanostructured glassy carbon nanorods provide about 2× higher sensitivity per unit area for dopamine sensing and more than 5× higher signal per unit area at low concentration of dopamine, with comparable LOD and time response. These glassy carbon nanorods were fabricated by pyrolysis of a lithographically defined polymeric nanostructure with an industry standard semiconductor fabrication infrastructure. The scalable fabrication strategy offers the potential to integrate these nanoscale carbon rods with an integrated circuit control system and with other complementary metal oxide semiconductor (CMOS) compatible sensors.

CONJOINT WORK OF A FUZZY REGULATOR WITH A MATHEMATICAL MODEL OF PREPARATION OF EXTRA HEAVY CRUDE OIL

In this paper we propose a variant of conjoint work of a fuzzy controller with a mathematical model of the preparation of extra heavy crude oil by reducing energy expenditures for transportation of heavy oil. This is accomplished through the use of models-identifiers of state of the flows in the circuit of control system of installation for oil heating in the primary preparation of extra heavy crude oil for it’s adaptation in the conditions of uncertainty on the basis of systemstructured mathematical modeling of the process.

Design of warm-acupuncture technique training evaluation device

To design a warm-acupuncture teaching instrument to train and evaluate its manipulation. We refer to the principle and technical operation characteristics of traditional warm-acupuncture, as well as the mechanical design and single-chip microcomputer technology. The device is consisted of device noumenon, universal acupoints simulator, vibration reset system and circuit control system, including frame, platform framework, the swing framework, universal acupoints simulator, vibration reset outfit, operation time circuit, acupuncture sensation display, and vibration control circuit, etc. It can be used to train needle inserting with different angles and moxa rubbing and loading. It displays whether a needle point meets the location required. We determine whether the moxa group on a needle handle is easy to fall off through vibration test, and operation time is showed. The device can objectively help warm-acupuncture training and evaluation so as to promote its clinical standardization manipulation.

INCREASING CONTROL’S EFFICIENCY FOR THE SHIP'S TWO-MASS ELECTRIC DRIVE

Purpose. For shipboard lifting and transporting machinery (LTM) with AC thyristor electric drives (ED) the problem of minimizing sway through the formation of the special law to change the principle of ED control over the lifting process is solved. Methodology. This goal was achieved through the following objectives: analysis of current studies on the reduction of the negative effects of load fluctuations, fixed on the suspension with variable parameters; determining the criteria to optimize the movement of the lifting mechanism and transfer control laws under which the load fluctuations are reduced; develop the methodology and experimental study of the main characteristics of the mobile model ED lifting mechanism with its load suspended from the perspective of both the parameterization of the control system (CS) as well as elements of ED. For realization of tasks in research methods of mathematical modeling of dynamic processes on the computer, structural methods of control theory, experimental studies in the laboratory setting have been used. Results. Based on analysis of current research can be concluded that the stability of the ED of LTM to the disturbing points provided coincidence zero electric coordinates and speed deviation diametric plane of the vessel from the vertical position. Criteria for optimizing CS used by the ED LTM mathematical description of its dynamics differential equations to the estimated coefficients derived from the functions of state variables. The experimental dependence of dynamic equations of motion of an object under the influence of disturbing forces in the coordinate plane allowed to parameterize characteristic equation to the form, providing the solution to sustainability since the motor shaft of LTM. The functional circuit of CS eliminates the aperiodic components in the control in compliance with the criteria of sustainability and quality of transients by applying all-range regulator coordinate characteristics of forcing overcoming the dead zone and increase electric resistance as the dynamic object. Practical value. Completion of the complex research may find practical application in the ED of ship’s LTM, which will improve their performance, decrease between the operating and maintenance simple.

Research on Web Press Tension Control System

Tension control of press is a key and difficult point of the whole machine control. The stand or fall of tension is directly related to the quality of the products. According to the characteristics of the web press tension control, this paper expounds the main factors influencing tension and the purpose of tension control, researches on the tension control principle of web tape, analyzes control rule and control circuit of tension control system, illustrates the advantages of PID control law adopted in the tension control system, and concludes the influencing factors of paper tape tension control system and the corresponding problems needed to solve in the control.

Design of generalised orthogonal filters: application to the modelling of dynamical systems

In this article, we define a new class of orthogonal filters with complex poles and zeroes inside their transfer function. This further improvement of classical orthogonal filters allows the possibility to model a wider range of real systems, that is, the systems whose mathematical models have complex zeroes besides real ones. These filters can be applied in the following areas: circuit theory, telecommunications, signal processing, bond graphs, theory approximations and control system theory. First, we describe the rational functions with complex poles and zeroes, and prove their orthogonality. Based on these functions, we designed the block diagram of orthogonal Legendre-type filter with complex poles and zeroes. After that an appropriate analogue scheme of this filter for practical realisation is derived. To validate theoretical results, we performed an experiment with a cascade-connected system designed and practically realised in our laboratories. The experiments proved the quality of the designed orthogonal model in terms of accuracy and simplicity.