scholarly journals A Visitor’s Hybrid Smart Guide Control System

2019 ◽  
Vol 7 (1) ◽  
pp. 9-18
Author(s):  
Cliff Orori Mosiori
Keyword(s):  
Control System ◽  
Control Systems ◽  
Hybrid Systems ◽  
Hybrid Control ◽  
Reactive Systems ◽  
Discrete Systems ◽  
Industrial Society ◽  
Continuous Control ◽  
General Terms ◽  
Technical University

Modern industrial society is filled with hybrid systems. The effectiveness of a control system is now a basic requirement in any institution. In general terms, hybrid systems are reactive systems that intermix discrete and continuous control components in which the discrete part of that control system makes the decision on behaving for the whole designed system and further decides if it can allow it to switch to another set of control protocols when appropriate conditions are availed. The continuous part only functions according to a specified protocol. Hybrid systems are common models used in digital (logic) and continuous networks and devices. Digital control programs detect, control, and supervise continuous and discrete systems using differential or difference equations. This principle was utilized in our design and reported thereof. Although this work developed a different method to deal with specific problems facing students at Technical University of Mombasa.  An upgrade was recommended so as to extend the control system to the eye- impaired students and visitors. Since the issue of optimal smart control systems cannot be ignored in the design of new control systems with today's requirements in our learning institutions, it was concluded that further research was necessary to bring about a fully reliable and well-developed control system able to use real-time and real routes as they exist at the university ground. This work reports a hybrid control guide system designed and implemented at the Technical University of Mombasa.  

Adaptive Hybrid Control for Rotationally Oscillating Drill (Ros-Drill©), Using a Low-Resolution Sensor

2011 ◽  
Author(s):  
Zhenyu Zhang ◽  
Jhon Diaz ◽  
Nejat Olgac
Keyword(s):  
Control System ◽  
Hybrid Control ◽  
Control Procedure ◽  
Practical Case ◽  
Continuous Control ◽  
Motion Sensors ◽  
Low Resolution ◽  
Control Logic ◽  
Biological Damage ◽  
Rotational Oscillations

A novel hybrid (i.e., discrete/continuous) control system is studied on a cellular microinjector technology called the Ros-Drill© (Rotationally Oscillating Drill). Ros-Drill© is developed primarily for ICSI (Intra-Cytoplasmic Sperm Injection). It is an inexpensive set-up, which creates high-frequency rotational oscillations at the tip of an injection pipette tracking a harmonic motion profile. These rotational oscillations enable the pipette to drill into cell membranes with minimum biological damage. Such a motion control procedure presents no particular difficulty when it uses sufficiently precise motion sensors. However, size, costs and accessibility of technology on hardware components may severely constrain the sensory capabilities. Then the trajectory tracking is adversely affected. In this paper we handle such a practical case, and present a novel adaptive-hybrid control logic to overcome the hurdles. The control is implemented using a commonly available microcontroller and extremely low-resolution position measurements. First, the continuous control system is analyzed and designed. Then, an adaptive, robust and optimal PID (proportional-integral-derivative) control strategy is performed. We demonstrate via simulations and experiments that the tracking of the harmonic rotational motion is achieved with desirable fidelity.

scholarly journals Hybrid Electromagnetic Shunt Damper for Vibration Control

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Ahmad Paknejad ◽  
Guoying Zhao ◽  
Simon Chesné ◽  
Arnaud Deraemaeker ◽  
Christophe Collette
Keyword(s):  
Control System ◽  
Power Consumption ◽  
Control Systems ◽  
Active Control ◽  
Hybrid Control ◽  
Current Source ◽  
Voltage Source ◽  
Control Law ◽  
Electromagnetic Devices ◽  
Hybrid Control System

Abstract It has been shown that shunting electromagnetic devices with electrical networks can be used to damp vibrations. These absorbers have however limitations that restrict the control performance, i.e., the total damping of the system and robustness versus parameter variations. On the other hand, the electromagnetic devices are widely used in active control techniques as an actuator. The major difficulty that arises in practical implementation of these techniques is the power consumption required for conditioners and control units. In this study, robust hybrid control system is designed to combine the passive electromagnetic shunt damper with an active control in order to improve the performance with low power consumption. Two different active control laws, based on an active voltage source and an active current source, are proposed and compared. The control law of the active voltage source is the direct velocity feedback. However, the control law of the active current source is a revisited direct velocity feedback. The method of maximum damping, i.e., maximizing the exponential time-decay rate of the response subjected to the external impulse forcing function, is employed to optimize the parameters of the passive and the hybrid control systems. The advantage of using the hybrid control configuration in comparison with purely active control system is also investigated in terms of the power consumption. Besides these assets, it is demonstrated that the hybrid control system can tolerate a much higher level of uncertainty than the purely passive control systems.

On Hybrid Control System Methods for Traffic and Transportation System

2012 ◽  
Vol 253-255 ◽  
pp. 1438-1442
Author(s):  
Xue Lei Meng ◽  
Li Min Jia ◽  
Yong Qin ◽  
Jie Xu
Keyword(s):  
Control System ◽  
Hybrid Systems ◽  
Hybrid System ◽  
Hybrid Control ◽  
Transportation System ◽  
The Future ◽  
Discrete Part ◽  
Hybrid Control System

Hybrid system is a whole system in which the discrete part and continual part interact each other. It discusses the definition and the character of the hybrid systems. Then the hybrid characters of the traffic and transportation system is described. It sums up the hybrid system methods of studying transportation system, points out the shortcomings of the current studying methods and forecasts the future studying fields and methods.

Digitalization of continuous control systems

SIMULATION ◽  
1965 ◽  
Vol 5 (5) ◽  
pp. 329-337
Author(s):  
M.A. Breuer
Keyword(s):  
Control System ◽  
Control Systems ◽  
Sampling Rate ◽  
Continuous System ◽  
Computer Programs ◽  
Continuous Control ◽  
Feedback Network ◽  
Simulated System ◽  
Hybrid Computer ◽  
Equivalent Program

This paper deals with the development of methods for analysis, and derivation of computer programs, for digitalizing continuous control systems. More spe cifically, given a continuous control system, we wish to determine an "equivalent" computer program to take the place of some analog shaping network in the system. An equivalent program is one for which the response of the digital system approximates the response of the continuous system in the time do main. Time and frequency comparisons between the responses of continuous and digitalized systems to step inputs are given. Equivalent computer programs for various standard shaping networks are derived. Revised programs are determined, where use is made of prediction and extrapolation techniques to com pensate for digital computation delay time. Finally, the feedback network in a missile control system containing an unstable aerodynamic airframe is digitalized, and the simulated system is run on an analog-digital hybrid computer system. Results are given, indicating system performance as a function of sampling rate, computation delay, and system gains.

Art.4 Parts and Components

2016 ◽  
Author(s):  
Casey-Maslen Stuart ◽  
Clapham Andrew ◽  
Giacca Gilles ◽  
Parker Sarah
Keyword(s):  
Control System ◽  
Control Systems ◽  
General Terms ◽  
System P ◽  
National Control

This chapter analyses Article 4 of the ATT. The article discusses the central obligations with respect to parts and components, requiring states parties to regulate the export of these items through their national control systems and to apply the provisions of Article 6 (Prohibitions) and Article 7 (Export and Export Assessment) to such exports. In general terms, states parties are only required to regulate the export of parts and components, not other types of transfers. Additionally, Article 4 requires states parties to regulate the export of parts and components where the export is in a form that provides the capability to assemble the conventional arms covered in Article 2(1) through a national control system.

Hybrid Control System for Seismic Protection of the Benchmark Model

2012 ◽  
Vol 193-194 ◽  
pp. 801-804
Author(s):  
Jian Fang Fu ◽  
Xin Jian Feng ◽  
Jian Lin Zhang
Keyword(s):  
Genetic Algorithm ◽  
Control System ◽  
Control Systems ◽  
Hybrid Control ◽  
Seismic Protection ◽  
Control Parameters ◽  
Objective Functions ◽  
Benchmark Model ◽  
Damper Control ◽  
Hybrid Control System

In this paper, a 20-storey Benchmark model is used to compare the effects of various control systems, including Damper control system, TMD control system and Hybrid control system. In the course of the optimization, the displacement reducing coefficient (DRF) and the storey drift reducing coefficient (SDRF) are used as the objective functions to optimize the control parameters based on Genetic Algorithm (GA). Numerical results prove the advisability of the Hybrid control system of dampers and TMD, which can not only decrease the floor displacement, but also improve the mutation of the storey drift.

scholarly journals The estimation of the dynamics of indirect control switching systems

2011 ◽  
Vol 48 (1) ◽  
pp. 197-213
Author(s):  
Miroslava Růžičková ◽  
Olena Kuzmych ◽  
Denys Ya. Khusainov
Keyword(s):  
Control System ◽  
Lyapunov Function ◽  
Nonlinear Control ◽  
Control Systems ◽  
Hybrid Systems ◽  
Hybrid System ◽  
Switching Systems ◽  
Time Switching ◽  
Indirect Control ◽  
Separate Control

Abstract The paper deals with the time switching hybrid systems described by nonlinear control equations with nonlinearity of a sector form. The estimation of the solution of the control system at any moment is established through the method of Lyapunov function. Both cases, stable and unstable control systems are considered. The final estimation of the solution of the hybrid system is obtained from the composition of perturbations of the separate control systems using the condition of solution continuity in the points of switching.

Research on the Improvement of Internal Control under Accounting Informationization Environment

2014 ◽  
Vol 687-691 ◽  
pp. 1962-1965 ◽  
Author(s):  
Xi Wang
Keyword(s):  
Information Technology ◽  
Control System ◽  
Control Systems ◽  
Internal Control ◽  
Information Society ◽  
Rapid Development ◽  
Case Analysis ◽  
Typical Case ◽  
Industrial Society ◽  
Internal Control System

Nowadays, developed information technology is leading human from the industrial society to information society. Internet and e-commerce are rapid development. Under accounting informationization, internal control is faced with many challenges, more and more problems happen which forces all enterprises to strengthen their internal control systems. This paper puts the internal control which is under the environment of information on research using the method of summarizing and case analysis. Then this thesis analyses the impacts of informatization to internal control. And according to the informatization, new risks of internal control under the environment of enterprise some countermeasures for improving the internal control of the corresponding enterprises are proposed. The improvement of internal control in the environment of information is discussed in this thesis through a typical case, which can provide reference and guidance of internal control system in the environment of information for so many enterprises.

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