Model-based Simulation of a Hydraulic Closed-loop Rotary Transmission with Automatic Control

2021 ◽  
Author(s):  
Gunnar Grossschmidt ◽  
Mait Harf
Keyword(s):  
Power Systems ◽  
Automatic Control ◽  
Closed Loop ◽  
Visual Programming ◽  
Hydraulic Motor ◽  
Model Based ◽  
Graphical Environment ◽  
Functional Scheme ◽  
Fluid Power Systems ◽  
High Level

Model-based simulation of a hydraulic closed-loop rotary transmission with automatic control of hydraulic pump and hydraulic motor is considered in the paper. The approach is based on multi-pole modelling and intelligent simulation. In the paper the functional scheme of the transmission is proposed and multi-pole models of components are introduced. Mathematical multi-pole models of components for steady state conditions and for dynamic transient responses are presented. A high-level graphical environment CoCoVila (compiler compiler for visual languages) is used as a tool for describing models and performing simulations. Object-oriented multi-pole models, visual programming environment, automatic program synthesis and distributed computing are as original approach in simulation of fluid power systems.

scholarly journals Modalys-ER for OpenMusic (MfOM): virtual instruments and virtual musicians

2002 ◽  
Vol 7 (3) ◽  
pp. 325-338 ◽  
Author(s):  
Richard Polfreman
Keyword(s):  
Physical Model ◽  
Visual Programming ◽  
Virtual Instruments ◽  
Model Parameters ◽  
Future Directions ◽  
Graphical Environment ◽  
Automation And Control ◽  
High Level ◽  
Musical Sounds ◽  
And Control

Modalys-ER is a graphical environment for creating physical model instruments and generating musical sounds with them. While Modalys-ER provides users with a relatively simple-to-use interface, it has only limited methods for mapping control data onto model parameters for performance. While these are sufficient for many interesting applications, they do not bridge the gap from high-level specifications such as MIDI files or Standard Western Notation (SWN) down to low-level parameters within the physical model. With this issue in mind, a part of Modalys-ER has now been ported to OpenMusic, providing a platform for developing more sophisticated automation and control systems that can be specified through OpenMusic's visual programming interface. An overview of the MfOM library is presented and illustrated with several musical examples using some early mapping designs. Also, some of the issues relating to building and controlling virtual instruments are discussed and future directions for research in this area are suggested. The first release is now available via the IRCAM Software Forum.

Energy Regenerative Actuator for Motion Control With Application to Fluid Power Systems

2004 ◽  
Vol 127 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Donald Margolis
Keyword(s):  
Power Systems ◽  
Motion Control ◽  
Power Flow ◽  
Fluid Power ◽  
Electric Signal ◽  
Absorbed Power ◽  
Fluid Power Systems ◽  
Power Application ◽  
High Level ◽  
Reduced Power Consumption

Motion control is principally involved with moving a load along some prescribed trajectory. Flight simulators and numerically controlled machine tools are examples where motion control is required. Actuators for motion control are typically electrohydraulic, electropneumatic, or electromechanical. An electric signal from a controller modulates high-power elements that control motion of a load in some prescribed manner. Since loads are continuously being accelerated and decelerated, actuators absorb energy as frequently as they output energy, but power is required from the supply regardless of the direction of power flow in the actuator. The absorbed power is simply dissipated in the actuator or power supply. An actuator concept is developed here in which energy storage elements become part of the actuator, and absorbed power is recovered while still performing a high level of motion control. The concept is developed for a fluid power application, but is not restricted to fluid-type devices. Practical realizations of this concept will allow downsizing of power supplies as well as reduced power consumption for any particular application.

Sign in / Sign up

Export Citation Format

Share Document