The systematic design for high speed interpolated/averaging ADC

2016 ◽  
Author(s):  
He Tang ◽  
Yong Peng ◽  
Xizhu Peng
Keyword(s):  
High Speed ◽  
Systematic Design

Disturbance Observers for Rigid Mechanical Systems: Equivalence, Stability, and Design

2002 ◽  
Vol 124 (4) ◽  
pp. 539-548 ◽  
Author(s):  
Erwin Schrijver ◽  
Johannes van Dijk
Keyword(s):  
Disturbance Rejection ◽  
Disturbance Observer ◽  
High Speed ◽  
Design Procedure ◽  
Systematic Design ◽  
Direct Drive ◽  
Robot Tracking ◽  
Feedback Structure ◽  
Drive Systems ◽  
The One

Mechanical (direct-drive) systems designed for high-speed and high-accuracy applications require control systems that eliminate the influence of disturbances like cogging forces and friction. One way to achieve additional disturbance rejection is to extend the usual (P(I)D) controller with a disturbance observer. There are two distinct ways to design, represent, and implement a disturbance observer, but in this paper it is shown that the one is a generalization of the other. A general systematic design procedure for disturbance observers that incorporates stability requirements is given. Furthermore, it is shown that a disturbance observer can be transformed into a classical feedback structure, enabling numerous well-known tools to be used for the design and analysis of disturbance observers. Using this feedback interpretation of disturbance observers, it will be shown that a disturbance observer based robot tracking controller can be constructed that is equivalent to a passivity based controller. By this equivalence not only stability proofs of the disturbance observer based controller are obtained, but it also provides more transparent controller parameter selection rules for the passivity based controller.

Systematic design and modelling of high-resolution, high-speed pipeline ADCs

Measurement ◽  
2005 ◽  
Vol 37 (4) ◽  
pp. 344-351 ◽  
Author(s):  
M. Parenti ◽  
D. Vecchi ◽  
A. Boni ◽  
G. Chiorboli
Keyword(s):  
High Resolution ◽  
High Speed ◽  
Systematic Design ◽  
Pipeline Adcs

An International Consortium on High-Speed Propulsion

1996 ◽  
Vol 33 (03) ◽  
pp. 203-210
Author(s):  
Spyros A. Kinnas
Keyword(s):  
High Speed ◽  
Systematic Design ◽  
Propeller Blade ◽  
Computational Tools ◽  
International Consortium ◽  
Cavitation Performance ◽  
Research Plan ◽  
Ultimate Objective ◽  
User Friendly ◽  
New Generation

Recent demands for higher speed ocean vehicles and, at the same time, for more efficient propulsion, have made the appearance of cavitation inevitable. Thus, contemporary hydrofoil or propeller blade designs must take advantage of controlled cavitation in order to increase the efficiency of propulsion. An International Consortium on Cavitation Performance of High-Speed Propulsors has been put together by the author. The ultimate objective of this effort is to develop a new generation of reliable and user-friendly computational tools for the analysis and systematic design of efficient cavitating hydrofoils or propulsors. Fifteen participants have joined this consortium thus far. They include research centers, propeller manufacturers, shipyards, and high-speed boat industries from the U.S., Europe, and Asia. An overview of the research plan and the approach for some of the research tasks are presented.

A Systematic Design of Tilting Pad Journal Bearing for a 1.2MW Turboblower

2011 ◽  
Vol 110-116 ◽  
pp. 2268-2276
Author(s):  
Hyeonmin Jo ◽  
Chaesil Kim ◽  
Sooyong Cho
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Journal Bearing ◽  
General Purpose ◽  
Rotor System ◽  
Systematic Design ◽  
Tilting Pad ◽  
Fluid Properties ◽  
Bearing Design ◽  
Tilting Pad Journal Bearing

Studies on bearing properties have been carried out to develop a rotor system with improved high-speed stability and high efficiency. However, there have been few presentations on systematic design of a tilting pad journal bearing with analysis of rotor vibration and fluid properties. Therefore, this paper presents a method to systematically design a tilting pad journal bearing, where stability of the rotor system is taken into consideration, using the general-purpose software, ARMD. This paper describes the bearing design process, which meets the conditions of 0.12mm-bearing clearance and metal temperature below 75°C.

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