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.

A Hybrid Physical-Dynamic Tire/Road Friction Model

2012 ◽  
Vol 135 (1) ◽  
Author(s):  
Jingliang Li ◽  
Yizhai Zhang ◽  
Jingang Yi
Keyword(s):  
Physical Model ◽  
Normal Load ◽  
Friction Model ◽  
Model Parameters ◽  
Dynamic Friction ◽  
Contact Patch ◽  
Road Friction ◽  
Friction Models ◽  
Vehicle Maneuver ◽  
And Control

We present a hybrid physical-dynamic tire/road friction model for applications of vehicle motion simulation and control. We extend the LuGre dynamic friction model by considering the physical model-based adhesion/sliding partition of the tire/road contact patch. Comparison and model parameters relationship are presented between the physical and the LuGre dynamic friction models. We show that the LuGre dynamic friction model predicts the nonlinear and normal load-dependent rubber deformation and stress distributions on the contact patch. We also present the physical interpretation of the LuGre model parameters and their relationship with the physical model parameters. The analysis of the new hybrid model's properties resolves unrealistic nonzero bristle deformation and stress at the trailing edge of the contact patch that is predicted by the existing LuGre tire/road friction models. We further demonstrate the use of the hybrid model to simulate and study an aggressive pendulum-turn vehicle maneuver. The CARSIM simulation results by using the new hybrid friction model show high agreements with experiments that are performed by a professional racing car driver.

On the Hybrid Physical/Dynamic Tire/Road Friction Model

2009 ◽  
Author(s):  
Jingang Yi
Keyword(s):  
Physical Model ◽  
Model Comparison ◽  
Friction Model ◽  
Model Parameters ◽  
Dynamic Friction ◽  
Preliminary Model ◽  
New Development ◽  
Road Friction ◽  
Estimation And Control ◽  
And Control

We present new development of a hybrid physical/dynamic tire/road friction model for real-time friction estimation and control. We extend the LuGre tire/road friction model by considering the physical model-based deformation distribution on the tire/road contact patch. Relationship between the physical friction model and the LuGre dynamic friction model has been built and developed. We have shown that the LuGre dynamic friction model predicts the similar deformation and stress characteristics of the physical model, and therefore the friction model parameters can be interpreted with physical meaning and estimated experimentally. We demonstrate preliminary model comparison study through the “smart tire” sensor measurements on a mobile robot platform.

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.

Evolutionary Optimization of Model Parameters for Electro-Injectors in Common Rail Diesel Engines

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
Paolo Lino ◽  
Guido Maione ◽  
Fabrizio Saponaro ◽  
Kang Li
Keyword(s):  
Diesel Engines ◽  
Combustion Efficiency ◽  
Common Rail ◽  
Evolutionary Strategy ◽  
Model Parameters ◽  
Modeling And Control ◽  
Injection Process ◽  
Fuel Flow ◽  
High Level ◽  
And Control

One of the main issues in the design, modeling, and control of innovative automotive engines is to reduce energy consumption and emission of pollutants and, at the same time, to guarantee a high level of performance indices. In particular, enhanced model-based control of the injection process has been a hot research topic in recent years to increase the combustion efficiency in common rail (CR) diesel engines and to meet strict legislations. This paper focuses on the development of a more accurate model for the electro-injector in CR diesel engines. The model takes into account the mechanical deformation of relevant parts of the electro-injector and the nonlinear fuel flow. Model parameters are then optimized by an evolutionary strategy. Simulation results confirm that the optimized model can be helpful for predicting the real trend of the injected fuel flow rate, evidenced by experimental data, thus can be helpful for injection control of CR diesel engines.

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