simpack user meeting 2003 flexible implementation … · domains (mbs, simulink) ... output...

SIMPACK User Meeting 18.04.2003, Kett

SIMPACK User Meeting 2003

Flexible Implementation of Fluid Power Systems in SIMPACK using the

DSHplus Simulation Tool Chain (STC)

by

Ronald Kett, FLUIDON [email protected], www.fluidon.com


Service Portfolio of FLUIDON


Fluid Power System Design with DSHplus

• Libraries to hydraulics,pneumatics, mechanics/driveengineering, thermo-hydraulicand control technology

• Component orientedmodeling concept

• Simulation models withcircuit diagram analogy

• Parameterization is basedon catalog data

• Open source code ofthe simulation models

Program features


Editable Source Code of the DSHplus Model

• Open source guaranties translucency of calculation

• Technology relevant data or calculations can be hidden in sub-functions

• Interfaces allow linking of measuring and control hardware (hardware in the loop)

• Convenient integration user defined calculation approaches or available C/C++ algorithms

• Interfaces allow the export of the model description into other simulation domains (MBS, Simulink)


Classical Application of Fluid Power Simulation

Forging PressSimulation Modelof the Forging Press


DSHplus for Hardware in the Loop Applications

Synthetic Model of the Plant

Real Controller Hardware

•The simulation generates synthetic sensor signals which are processed to new command signals for the simulation by the external controller hardware


DSHplus -HIL with external Controller Hardware

The DSHplus-HIL-Box

The DSHplus-Interface to the HIL-Box

•Development of new controller routines and control concepts

• Inspection of safety routines by simulation of crucial operating states

•Presetting of controller parameters


DSHplus -HIL to Test a Plant Main Control System

Catapult Systemfor the Drop Towerin Bremen Simulation Model

of the Catapult System

• Inspection of the safety routines of the plant main control system by simulation of crucial operating states

•Presetting system parameters


Fluid Power Systems for Real Time Applications

©


DSHplus Advanced Component Development (1)

©



©



Pump Torque

DSHplus Pump Model

MechanicalPump Model

DSHplus Piston Pressures

©


DSHplus Historical Program Interfaces

Komplexes reales System

mit fluidtechnischem Subsystem

Komplexes Gesamtsimulationsmodell

...

Bildung eines Gesamtsimulators

Auswahl einesgeeigneten Simulations-

programms

Modellierung des fluid-technischen Systems

Modellierung z. B. desmechanischen Systems

Copyright 1995-2000 byAll rights reserved. Gesellschaft für Fluidtechnik mbH

DSH 3

Right from its beginning DSHplus offers a variety of easily usable Program Interfaces. The main objective of these interfaces is to provide the design engineer with options that enable a convenient integration of new or adaptation of existing functionality/component behavior into the simulation.

Matlab®/Simulink® InterfaceBesides the possibility to run Matlab® M-files or Simulink® models in the back ground of a DSHplus simulation it is also possible to export the complete DSHplus

simulation model into a Simulink® S-function.

Multi-Body Simulation Interface It is now possible to interface a DSHplus

model into SIMPACK® , MSC.ADAMS®, LMS.DADS® and a number of company specific multi-body simulation programs.Due to the open model approach of DSHplus

there are different possibilities to accomplish such an interface.


The Idea of the DSHplus-STC


Potentialities of the DSHplus –STCin a Multi Domain System Development


Flexibility of the DSHplus -STC

• DSHplus-STC modules can be used wherever fluid power systems interfere with mechanical structures orcomplex controller set-ups.

• Examples are suspension,breaking and steering systems in automotive applications, construction vehicles,railway and aeronautic industry, transport technology, and mechanical and plan engineering wherepresses, elevators and machine parts are actuated by fluid power systems.


The DSHplus Open Interface Functions

DSHplus model with signal inputand signal output components

DSHplus -OIF5 Functions which the customer can access with own

routinesWhat ever interface – to external programor hardware – is required

DSHplus InteraktiveSimulation Interface

DSHplus Hardware Interface

DSHplus Co-Simulation Interface


The DSHplus-STC Module

DSHplus model with signal input and signal output components as a starting point for theDSHplus-STC model export

DSHplus-STC Module4 Functions over which the module can be linked into

other programs

what ever interface is required


The Coupling Procedure

Co-Simulation or Embedded Mode

Stop

StartInitialization

Send initial values

Terminate calculation

Receive dataIndividual InterfaceSet-up

External Simulation

Environment

Send data

InitializationGet initial values

Terminate calculation

Send data

Receive data

DSHplus -OIFInterface to

DSHplus-Co-Simulation Dialog

DSHplus-STC Module

Flag to switch betweenCo-Simulation

or Embedded Mode


Inter- & Extrapolation of Exchanged Values

Purpose: Avoidance of jump shaped value changes, decrease in CPU time

DSHplus

Co-Simulationor Embedded

Extern

1

2

3

4

IP IP

EP

IP

EP

Step 1 Step 2 Step 3


DSHplus -STC-Dialog in SIMPACK

CoSimu (PC)

DSHplus

runsSIMPACK

runsSharedMemory

Routines

Embedded (PC, Workstation)

SIMPACKruns

f(x)

Routines DSHplus

Module

Co-Simulation Flag


Co-Simulation of Cylinder Drive(Testing Environment)

Internal state vari-ables (pressures)

Interface variables in DSHplus

(stroke, force)

Position controlled cylinder drive

Mass with user defined force element

Interfacevariables in SIMPACK (stroke, force)


Simulation of a Power Steering

Co-simulation interface dialog

Pressure amplification of the steering valvePower steering model

with interface ports for mechanical, hydraulic, and control values

Automotive plus car model

simpack user meeting 2003 flexible implementation … · domains (mbs, simulink) ... output...

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