implementing own vehicle as cad
Hello, currently my plan is to implement a vehicle (buggy) as cad, model it so it includes joints etc and then make an event like slalom. I will keep it simple so it will contain:
1)Chassis
2)Tires
3)control arms for suspensions
4) springs-absorbers
5) knuckles for joints tires with suspensions
There will be no engine, steering wheel.
WHat could i implement from the vehicle tools libraries to make it easier. I was thinking about tires.
Whats the procces of implementing tires to the model? Is there a guide?
also when i decide to make the slalom event, i guess the most reasonant way is setting an altair driver in the model. Is this even possible when i havent included engine/steering wheel or i should use motions to make this event feel like it ??
will this be enough to make the premade tires keep in contact with ground and follow the diy event? will this work as it is supposed to ? is there any easier way ?
Any tips are welcome.
Thanks in advance.
Best Answer
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Hi @Pantelis_Myrio,
Implementing your own vehicle model can mainly be approached 2 ways:
- Modifying an assembly created using our Assembly Wizard
- Creating the entire model from scratch
In most cases, there is an assembly model that is close to your vehicle configuration that will allow you to skip ~80% of model creation and save a considerable amount of time, especially if you are new to the product.
To answer your specific questions:
From the Entity Browser, navigate to Vehicle Tools » Components » Tire
Use the Guide Bar to define an attachment body, wheel center point, tire marker. and road marker.
Please look at any of the assembly models or example models for examples of what bodies/points/markers are chosen for definition.
You will need to add the necessary kinematics to the model in order to simulate the vehicle. You can't just import the CAD and expect it to simulate properly. After adding in the necessary constraints, tires, etc., then you can implement the Altair Driver Model to navigate driven events.
Almost identical to above, please add the Altair Driver Model from the Entity Browser » Vehicle Tools » Components » Driver. Use the Guide Bar to select the first set of necessary entities, then further define the Driver in the Entity Editor:
Altair has plenty of in-depth resources to help you learn and master various Altair products, such as eLearning, Community Discussions, and Tutorials.
Altair offers an introductory course, MotionView/MotionSolve Introduction eLearning, for solving multi-body dynamics (MBD) problems using HyperWorks and illustrates constructing, solving and post-processing MBD problems. This course focuses on general Multibody mechanisms and is a starting point for learning modeling in MotionSolve.
You can find it at the following link:
Altair Engineering Inc. - Sign InAltair also offers a specialized multi-body dynamics (MBD) course for vehicle modeling, called MotionSolve for Vehicle Modeling eLearning. This class introduces the application of MotionSolve for vehicle modeling applications, such as assembly of half or full car models, vehicle event creation, generating event reports, modifying vehicle subsystems, and preliminary verification methods.
You can find it at the following link:
Hope this helps!
Adam Reid
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Altair Employee
Answers
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Hi @Pantelis_Myrio,
Implementing your own vehicle model can mainly be approached 2 ways:
- Modifying an assembly created using our Assembly Wizard
- Creating the entire model from scratch
In most cases, there is an assembly model that is close to your vehicle configuration that will allow you to skip ~80% of model creation and save a considerable amount of time, especially if you are new to the product.
To answer your specific questions:
From the Entity Browser, navigate to Vehicle Tools » Components » Tire
Use the Guide Bar to define an attachment body, wheel center point, tire marker. and road marker.
Please look at any of the assembly models or example models for examples of what bodies/points/markers are chosen for definition.
You will need to add the necessary kinematics to the model in order to simulate the vehicle. You can't just import the CAD and expect it to simulate properly. After adding in the necessary constraints, tires, etc., then you can implement the Altair Driver Model to navigate driven events.
Almost identical to above, please add the Altair Driver Model from the Entity Browser » Vehicle Tools » Components » Driver. Use the Guide Bar to select the first set of necessary entities, then further define the Driver in the Entity Editor:
Altair has plenty of in-depth resources to help you learn and master various Altair products, such as eLearning, Community Discussions, and Tutorials.
Altair offers an introductory course, MotionView/MotionSolve Introduction eLearning, for solving multi-body dynamics (MBD) problems using HyperWorks and illustrates constructing, solving and post-processing MBD problems. This course focuses on general Multibody mechanisms and is a starting point for learning modeling in MotionSolve.
You can find it at the following link:
Altair also offers a specialized multi-body dynamics (MBD) course for vehicle modeling, called MotionSolve for Vehicle Modeling eLearning. This class introduces the application of MotionSolve for vehicle modeling applications, such as assembly of half or full car models, vehicle event creation, generating event reports, modifying vehicle subsystems, and preliminary verification methods.
You can find it at the following link:
Hope this helps!
Adam Reid
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Okay i see.
Instead of implementing the driver, if i just apply motions (rotational to the rear tires and steering to the front) will this also work ? (i guess by the time the tires come from the library, then they create forces so it will work) Does it seem reasonant to you ?
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Hi @Pantelis_Myrio,
This will not allow you to use any of the standard events from the Entity Browser. Other than for a simple test of your model, I would encourage you to implement the few entities required to utilize the powerful features of the Altair Driver Model and Standard Events.
Hope this helps!
Adam Reid
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understood.
In order to import the driver should i follow this guide: https://help.altair.com/hwsolvers/ms/topics/tutorials/mv/tut_mv_8800_add_driver_2wheeler_t.htm
and then will I be able to implement events like slalom?
Is there a guide for car?
Do I have to create a steering rack in order to be able to choose the steering joint? (right now I can only rotate manually the joints on each wheel to steer).
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Hi @Pantelis_Myrio,
Yes, that would be a suitable guide.
The approach is almost identical for a car model.
You will need a steering system to steer the vehicle. It does not need to be complete back to a steering wheel, but you will need a singular revolute joint to steer the vehicle.
Hope this helps!
Adam Reid
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Okay, thanks for your help !
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