Oh, I see, have a try .Thank you very much 在2022年11月8日星期二 UTC+8 16:56:36<Radu Serban> 写道：
> There is a function Sedan::SetInitialFwdVel which would allow you to > impose an initial velocity on the chassis body (in its forward X > direction). You may also want to impose consistent wheel angular > velocities (using Sedan::SetInitWheelAngVel). The velocities of all bodies > in the vehicle system will be inconsistent at the initial time, but that > should be resolved after the first simulation step. However, with a proper > powertrain and driveline, the vehicle will not maintain this initial speed > and should slowly decelerate. > > > > If you want to force the vehicle to move in a straight line with constant > speed, you should use lateral and longitudinal controllers to adjust the > vehicle inputs (steering, throttle, and braking) accordingly. Look at any > demos using such PID-controller based driver model, for example the > combined ChPathFollowerDriver as used in demo_VEH_SteeringController > <https://github.com/projectchrono/chrono/blob/main/src/demos/vehicle/controllers/demo_VEH_SteeringController.cpp> > . > > --Radu > > > > *From:* [email protected] <[email protected]> *On > Behalf Of *ji li > *Sent:* Tuesday, 8 November 2022 09:47 > *To:* ProjectChrono <[email protected]> > *Subject:* Re: [chrono] How to modify speed > > > > Hi Radu, > > Thank you for your reply > > > > I want to say, when initializing the car, can I give the Sedan > a speed and let it run at this speed? > > > > 在2022年11月8日星期二 UTC+8 15:36:39<Radu Serban> 写道： > > I am not quite sure I understand your question. In general, the speed of > a Chrono vehicle cannot be set directly. Instead, you accelerate / > decelerate a vehicle through its throttle and braking inputs. How you do > this depends on what ‘driver’ model you use. > > > > If you are talking about demo_VEH_Sedan in particular, that one uses a > ‘driver’ model which expects keyboard user inputs. You control the vehicle > with the AWSD keys. > > > > --Radu > > > > *From:* [email protected] <[email protected]> *On > Behalf Of *ji li > *Sent:* Tuesday, 8 November 2022 08:19 > *To:* ProjectChrono <[email protected]> > *Subject:* [chrono] How to modify speed > > > > Hello, > > When I tested this project recently, I found that the speed of the > Sedan could not be modified. I want to know how to modify the speed. > > -- > 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/045130e8-9383-4413-a244-665342bc50b4n%40googlegroups.com > > <https://groups.google.com/d/msgid/projectchrono/045130e8-9383-4413-a244-665342bc50b4n%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/19dafd96-2c6d-440f-8517-38f0dc4fafb3n%40googlegroups.com > > <https://groups.google.com/d/msgid/projectchrono/19dafd96-2c6d-440f-8517-38f0dc4fafb3n%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/08eda76e-6ed1-4133-9f07-b75ff134a8c0n%40googlegroups.com.
