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Introduce Wheel Ramping in Simulation#3805

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Andrewyx wants to merge 7 commits into
UBC-Thunderbots:masterfrom
Andrewyx:Andrewyx/sim_ramping
Open

Introduce Wheel Ramping in Simulation#3805
Andrewyx wants to merge 7 commits into
UBC-Thunderbots:masterfrom
Andrewyx:Andrewyx/sim_ramping

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@Andrewyx

@Andrewyx Andrewyx commented Jun 25, 2026

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Description

Currently, wheel velocity ramping is performed in the field via rampWheelVelocity, however, in sim, we do not do any ramping at all and assume we always maintain ideal velocity, To reduce the disparities between our sim and real observations, this PR introduces ramping to the simulator and tweaks correlated tests to adhere to this new behaviour.

Testing Done

All tests pass, thunderscope runs at an expected rate. Thresholds for tests loosened as little as possible and within reasonable limits.

Resolved Issues

Length Justification and Key Files to Review

Review Checklist

It is the reviewers responsibility to also make sure every item here has been covered

  • Function & Class comments: All function definitions (usually in the .h file) should have a javadoc style comment at the start of them. For examples, see the functions defined in thunderbots/software/geom. Similarly, all classes should have an associated Javadoc comment explaining the purpose of the class.
  • Remove all commented out code
  • Remove extra print statements: for example, those just used for testing
  • Resolve all TODO's: All TODO (or similar) statements should either be completed or associated with a github issue

williamckha
williamckha previously approved these changes Jun 26, 2026
williamckha
williamckha previously approved these changes Jul 4, 2026
@nycrat

nycrat commented Jul 5, 2026

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@Andrewyx you'll have to pull from master or else ci fails

@nycrat nycrat left a comment

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LGTM !

Comment on lines +392 to +412
auto prev_it = prev_ramp_velocities->find(robot_id);
if (prev_it == prev_ramp_velocities->end())
{
LocalVelocity seed{Vector(0, 0), AngularVelocity::zero()};
auto robot_state_it = robot_map.find(robot_id);
if (robot_state_it != robot_map.end())
{
seed = LocalVelocity{robot_state_it->second.localVelocity(),
robot_state_it->second.angularVelocity()};
}
prev_it = prev_ramp_velocities->insert({robot_id, seed}).first;
}

direct_control = getRampedVelocityPrimitive(
prev_it->second.linear, prev_it->second.angular, *direct_control_no_ramp,
primitive_executor_time_step);

// Persist the ramped command as the setpoint to ramp from next tick.
const auto& ramped =
direct_control->motor_control().direct_velocity_control();
prev_it->second =

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nit: prefer structured bindings for iterators over ->first and ->second for readability. For example:

// ...
{
	auto& [id, state] = *robot_state_it;
}
// ...
auto& [id, prev_velocity] = *prev_it;

Or just create a variable since we don't use ->first in this code:

auto& state = robot_state_it->second;
auto& prev_velocity = prev_it->second;

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3 participants