Input rate flow control for high speed communications networks using burst level feedback control

In high-speed fluid dynamics, base pressure controls find many engineering applications, such as in the automobile and defense industries. Several studies have been reported on flow control with sudden expansion duct. Passive control was found to be more beneficial in the last four decades and is used in devices such as cavities, ribs, aerospikes, etc., but these need additional control mechanics and objects to control the flow. Therefore, in the last two decades, the active control method has been used via a microjet controller at the base region of the suddenly expanded duct of the convergent–divergent (CD) nozzle to control the flow, which was found to be a cost-efficient and energy-saving method. Hence, in this paper, a systemic literature review is conducted to investigate the research gap by reviewing the exhaustive work on the active control of high-speed aerodynamic flows from the nozzle as the major focus. Additionally, a basic idea about the nozzle and its configuration is discussed, and the passive control method for the control of flow, jet and noise are represented in order to investigate the existing contributions in supersonic speed applications. A critical review of the last two decades considering the challenges and limitations in this field is expressed. As a contribution, some major and minor gaps are introduced, and we plot the research trends in this field. As a result, this review can serve as guidance and an opportunity for scholars who want to use an active control approach via microjets for supersonic flow problems.

Download Full-text

Active Power Flow Control for Generating a Quiet Zone in a Thin Plate (Feedback Control System Based on Cluster Control Method)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.72.394 ◽

2006 ◽

Vol 72 (714) ◽

pp. 394-401 ◽

Cited By ~ 1

Author(s):

Akihide SAKANO ◽

Nobuo TANAKA

Keyword(s):

Control System ◽

Feedback Control ◽

Flow Control ◽

Thin Plate ◽

Power Flow ◽

Control Method ◽

Active Power ◽

Feedback Control System ◽

Power Flow Control ◽

Active Power Flow

Download Full-text

STAND-UP MOTION SUPPORT BY A MOBILE MANIPULATOR SYSTEM WITH HIGH SPEED TACTILE SENSORS

International Journal of Information Acquisition ◽

10.1142/s0219878911002458 ◽

2011 ◽

Vol 08 (03) ◽

pp. 181-195

Author(s):

ZHAOXIAN XIE ◽

HISASHI YAMAGUCHI ◽

MASAHITO TSUKANO ◽

AIGUO MING ◽

MAKOTO SHIMOJO

Keyword(s):

Fuzzy Logic ◽

Feedback Control ◽

Experimental Verification ◽

High Speed ◽

Center Of Pressure ◽

Tactile Sensor ◽

Mobile Manipulator ◽

Tactile Sensing ◽

Robot Arm ◽

Tactile Sensors

As one of the home services by a mobile manipulator system, we are aiming at the realization of the stand-up motion support for elderly people. This work is charaterized by the use of real-time feedback control based on the information from high speed tactile sensors for detecting the contact force as well as its center of pressure between the assisted human and the robot arm. First, this paper introduces the design of the tactile sensor as well as initial experimental results to show the feasibility of the proposed system. Moreover, several fundamental tactile sensing-based motion controllers necessary for the stand-up motion support and their experimental verification are presented. Finally, an assist trajectory generation method for the stand-up motion support by integrating fuzzy logic with tactile sensing is proposed and demonstrated experimentally.

Download Full-text