There are several types of tire models implemented in Chrono::Vehicle: * Rigid tire (simplest possible model) is based solely on rigid body contact. This “tire” model is defined by its geometry and contact material properties. * FEA tires (arguably the most complex) are defined by their geometry (FEA mesh), elastic material properties, and contact material properties. * Handling tires (also called “force element” tires in Chrono) depend on a large number of parameters, specific to the particular model implemented (Pacejka, Fiala, TMeasy, TMsimple). Parameters for these models must be consistent and are typically obtained as a complete set for a particular tire. TMeasy provides some utility functions to estimate the model parameters based on a standard tire specification and tire type (passenger car or truck). Best way to understand what parameters mean for these tire models is to look up the respective formulas online or in publications. Chrono::Vehicle uses variable names close to what you’ll find there.
In general, you can find out about the meaning and purpose of various model parameters (whether for tires or other Chrono::Vehicle subsystems) by looking at the comments in the implementation header files (for tires, these will be files with names Ch***Tire.h) or else looking at the JSON key names in the associated JSON specification files for a concrete subsystem (you will find examples of such JSON files in the Chrono data directory, under data/vehicle/) --Radu From: '马浩楠' via ProjectChrono <[email protected]> Sent: Friday, August 11, 2023 10:49 AM To: ProjectChrono <[email protected]> Subject: [chrono] Re: Questions about the usage of the vehicle library Thank you for your response. I want to define this tire more specifically, not limited to just its radius and width. For example, attributes like the tire's mass should also be included. How extensive can this customization be? 在2023年8月11日星期五 UTC+8 15:07:16<[email protected]<mailto:[email protected]>> 写道： you can refer to demo_VEH_WheeledJSON.cpp, this is an example of how to use templated vehicle dynamics 在2023年8月11日星期五 UTC+8 14:47:36<[email protected]> 写道： Hello, I'm a beginner and I've been using the vehicle library for about two days. I want to modify the JSON data for certain vehicles in the vehicle library, such as "Maximum Torque". However, I'm not familiar with cars and I don't know which JSON nodes correspond to specific value ranges. Is there any related development documentation available? -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]<mailto:[email protected]>. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/669534d0-7ee3-4945-a5cb-60c60b7f0b88n%40googlegroups.com<https://groups.google.com/d/msgid/projectchrono/669534d0-7ee3-4945-a5cb-60c60b7f0b88n%40googlegroups.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/PH0PR06MB82373E81171046119D5297E5A710A%40PH0PR06MB8237.namprd06.prod.outlook.com.
