CRAM v0.5.0

New features:

  • Created new package CRAM-PR2-FETCH-DELIVER-PLANS with FETCHING and DELIVERING plans that fetch an object from a surface in the environment and deliver it at the specified location on a surface.
  • Created new types of plan failures, mostly high-level ones, such as OBJECT-UNFETCHABLE.
  • Created new package CRAM-PR2-PROJ-REASONING where projection-based reasoning is done, etc. reasoning about collisions.
  • Created new package CRAM-PR2-PICK-PLACE-DEMO with a pick and place scenario in the kitchen.
  • Manipulation configuration calculations have been majorly improved:
    • Pregrasp and postgrasp are now transforms and not poses to enable easy multiplication
    • The gripper coordinate frame of different robots does not influence object grasping configuration anymore
    • Pregrasp configuration is now calculated w.r.t the object, such that the gripper approaches the object without tipping it over.
    • Grasping actions can now also accept a list like ”'(left right)”
    • Some new objects have been added, such as cereal, etc.
    • Old offsets have been fixed to work better on the real robot.
  • Basic logging for pick and place actions has been implemented, see “cram_cloud_logger” package:
    • Object designators can be logged.
    • Poses can be logged.
    • Location designators can be logged.
    • Fetch and deliver action designators can be logged with their parameters but without action hierarchy.
    • Success or failure boolean of an action can be logged.
  • When picking action asks for IK solutions, now a torso angle sampling is also done to increase the robot's reachability area.
  • Implemented a caching mechanism for IK solver as it seemed to have a problem with configurations that have already been processed.
  • A pretty printer for DESIGNATOR class has been implemented.
  • TF utilities from “cram_pr2_cloud” package were moved into “cram_tf” package, they're quite useful (multiplying transform-stamped-s etc.), check them out.
  • Perceived object events are now handled correctly by the belief state, such that perceived objects get spawned in the bullet world etc.
  • Object attachment and detachment events are now handled correctly, including Bullet world attachments.
  • (a location (of (an object (pose … ) now returns the pose of the object.
  • Implemented WITH-PROJECTED-ROBOT & WITH-SIMULATED-ROBOT & WITH-REAL-ROBOT macros for running plans accordingly.
  • Renamed:
    • cram_pr2_pick_place_plans → cram_mobile_pick_place_plans
    • cram_pr2_plans → cram_pr2_plans_deprecated
  • Rearranged and cleaned up a lot of code, especially the pick and place plans.
  • An initial version of a script for checking ASDF dependencies and configuring workspaces with CATKIN_IGNORES was implemented.

See ChangeLog for more details.

2018/01/30 18:02 · Gayane Kazhoyan

CRAM v0.4 is out

The development of CRAM continues and we have a new version out!

The biggest changes in CRAM v0.4.0 is comparison to v0.3.0 is the restructuring: all main CRAM repositories got merged into one big repo, which makes maintenance and installation easier. Now we can be sure that all the packages have compatible with each other versions. Moreover, to install CRAM you now only need to clone one repository from GitHub, run rosdep install and you're ready to go.

For those who worry about huge repositories with enormous dependencies: don't worry! With the new script for managing dependencies, only the dependencies of a particular high-level package you want to use or a particular tutorial code, will be installed on your system. It's a smart script that crawls the package.xml file of the entry high-level package and all its dependencies and adds CATKIN_IGNORE files automatically to all the unused packages. More about this in the v0.4.1 blog post, stay tuned.

The tutorial on using PR2 for pick and place tasks in a fast simulation environment has been updated with new cool plans, so do check it out. The beginner tutorials have also been updated and majorly improved, with these tutorials learning CRAM hasn't ever been more fun than it is now.

2017/09/19 17:05 · Gayane Kazhoyan

CRAM v0.3.0

A new version of CRAM is out!

Here is what's new since v0.2.0:

  • In cram_core, we've got 2 new features together with small nicifications and fixes, no API breakage. Now we have motion designators, which are a new class of designators used to interface with process modules, calling PERFORM on them results in calls to process modules. PERFORMing action designators, on the other hand, now calls other plans. Check out the tutorial for this new feature.
  • In cram_3rdparty, yason has been updated to a newer version with no API breakage
  • cram_plans got renamed into cram_common, which seems to be a much more fitting name for the repo. Also, cram_transforms_stamped got renamed into cram_tf, which is shorter. No API breakage except the renamings. There have been important bugfixes in the location costmap functionality, better initialization of cram_tf variables, some new utility functions in cram_tf and cram_robot_interfaces and a new package cram_commander to execute CRAM actions over ROS.
  • cram_semantic_maps got renamed into cram_knowrob and there were some bugfixes and updates to support newer KnowRob APIs and the new semantic map of the kitchen.
  • cram_3d_world got rid of some unused dependencies, moveit-specific things were moved away into the cram_pr2 repo, household objects were renamed into items to support other domains than human household, new utility functions, nicifications etc.
  • in cram_pr2 there have been lots of changes: process module bugfixes, a new cram_motion_manager package to support different motion planners, reachability costmap now supports moveit IK interface, there are new low-level interfaces, designators and plans also available for PR2, etc.
  • the rosinstall file for CRAM has been updated to use the newest version.

All the main CRAM repositories now contain a file!

On the aforementioned repositories, there have been 39 PRs merged, 15 issues solved, and there are currently no PRs or issues open!

Bug reports and requests for new features are as always most welcome.

2017/03/16 15:22 · Gayane Kazhoyan

CRAM at SHERPA EU project review

Our FP7 project, SHERPA, came to an end with a final review between 1st and 3rd March in Davos, Switzerland.

We had the chance to demonstrate our HMI-enabled high-level planing and reasoning in a wide-area rescue scenario, where CRAM was used as a reactive planner and an executive.

The hardware was simulated using the Unreal game engine with a ROS interface and our RoboSherlock perception system took care of the vision.

The demonstration has received very positive feedback from the reviewers and partners. We thank all of the contributors for this successful project!

(Post originally from IAI blog)

2017/03/16 15:16 · Gayane Kazhoyan

Autogenerated API documentation for CRAM Plan Language

There is a new reference manual for the cram-language ASDF system! Check it our here. More autogenerated API to come.

2016/02/01 18:49 · Gayane Kazhoyan

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