Hi Mariah – I think that you’d stand a better chance of getting help if you post the simplest Chrono model that still shows your problem.
Otherwise, folks might have only very high-level advice, if any. Dan ------------------------------------------------ Bernard A. and Frances M. Weideman Professor NVIDIA CUDA Fellow Department of Mechanical & Aerospace Engineering Department of Computer Science University of Wisconsin - Madison 4150ME, 1513 University Avenue Madison, WI 53706-1572 608 772 0914 http://sbel.wisc.edu/ http://projectchrono.org/ ------------------------------------------------ From: [email protected] <[email protected]> On Behalf Of M. Pereira Sent: Monday, May 18, 2026 4:27 AM To: ProjectChrono <[email protected]> Subject: [chrono] Detent Mechanism with ChRSDA issue Hi everyone, I’ve been using the ChLinkRSDA method to model the behavior of a detent mechanism in chrono. I added a preload torque so the mechanism has an initial resisting torque even before any external force is applied. However, after introducing the preload torque, the simulation became severely unstable. The moving part tends to separate or “break loose” from the pivot/frame connection during the simulation. Has anyone experienced similar instability issues when using RSDA? If so, how did you handle it? Also, I’d be interested to hear if anyone has modeled a detent mechanism using a different approach in Chrono that worked more reliably. I've been needing to reduce the timestep too much (to the power of -6) to make it a little more stable. Thanks in advance for any suggestions. -- 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 visit https://groups.google.com/d/msgid/projectchrono/89209ac1-ceb2-4af4-9a32-a4c3a6c8a6den%40googlegroups.com<https://urldefense.com/v3/__https:/groups.google.com/d/msgid/projectchrono/89209ac1-ceb2-4af4-9a32-a4c3a6c8a6den*40googlegroups.com?utm_medium=email&utm_source=footer__;JQ!!Mak6IKo!La2n1Ne2qp0J6h1NiuIBnr_KMyFhrgEGfF_Wlwf6snfPiO1vVR0M0zYfd2wrRtXYtnxYR3KoAhcvLFgwJpD8riNq$>. -- 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 visit https://groups.google.com/d/msgid/projectchrono/DM8PR06MB7703E5164B71407401EF1D41B1002%40DM8PR06MB7703.namprd06.prod.outlook.com.
