Hydraulic Control Systems for Automatic Transmissions

1962 ◽  
Author(s):  
J. R. Doidge ◽  
C. W. Cline
Keyword(s):  
Control Systems ◽  
Hydraulic Control ◽  
Automatic Transmissions

scholarly journals Synthesis of High-Precision Hydraulic Control Systems of an Excavator

2018 ◽  
Vol 196 ◽  
pp. 04033 ◽  
Author(s):  
Konstantin Galitskov ◽  
Stanislav Galitskov ◽  
Ivan Dudanov
Keyword(s):  
Control Systems ◽  
Hydraulic Drive ◽  
Loop System ◽  
Pid Controllers ◽  
Practical Implementation ◽  
Hydraulic Control ◽  
Structural Synthesis ◽  
Satellite Navigation System ◽  
Automatic Control Systems ◽  
Rotary Platform

Practical implementation of the program controlling the movement of the excavator’s working tool (including the use of satellite navigation system) imposes stringent requirements on the dynamic and static accuracy of automatic control systems for the hydraulic excavator’s operating mechanisms, in conditions of non-stationary parameters of these mechanisms as control objects. The authors describe the effective solution of this problem by implementing structural synthesis of each servo hydraulic drive as a multi-loop system with one measured coordinate (MLSOMC). The EO-4121 excavator with four hydraulic drives (rotary platform, boom, arm and ladle) was used as an example to demonstrate that the implementation of three circuits in the multi-loop system with one measured coordinate in each of these drives with typical PID-controllers allows to ensure the robustness of the ACS for known uncertainties, as well as the required rates of control quality in static and dynamic modes.

Development of a High-Speed on/off Digital Valve for Hydraulic Control Systems using a Multilayered PZT Actuator

2000 ◽  
Vol 1 (2) ◽  
pp. 5-10 ◽  
Author(s):  
Hironao Yamada ◽  
Guy Wennmacher ◽  
Takayoshi Muto ◽  
Yoshikazu Suematsu
Keyword(s):  
Control Systems ◽  
High Speed ◽  
Hydraulic Control ◽  
Pzt Actuator

scholarly journals Design of PI Controllers for Hydraulic Control Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
LJubiša Dubonjić ◽  
Novak Nedić ◽  
Vojislav Filipović ◽  
Dragan Pršić
Keyword(s):  
Control Systems ◽  
Transmission Lines ◽  
Relative Stability ◽  
High Order ◽  
Hydraulic Control ◽  
Hydraulic Systems ◽  
Algebraic Equations ◽  
Nyquist Criterion ◽  
Pi Controllers ◽  
Nonlinear Algebraic Equations

The paper proposes a procedure for design of PI controllers for hydraulic systems with long transmission lines which are described by models of high order. Design is based on the combination of the IE criterion and engineering specifications (settling time and relative stability) as well as on the application ofD-decomposition. In comparison with some known results, the method is of graphical character, and it is very simple (solving nonlinear algebraic equations is eliminated). The paper presents the algorithm of software procedure for design of the controller. The method is compared with other methods at the level of simulation, and its superiority is shown. By applying the Nyquist criterion, it is shown that the method possesses robustness in relation to non modelled dynamics.

Sign in / Sign up

Export Citation Format

Share Document