Swarm Robotics: Past, Present, and Future [Point of View]

May combine two claims.

Specific robots developed to solve specific (toy) problems have opened new research directions but not always resulted in reusable components to be borrowed in different contexts.

“On the one hand, specific robots have been developed to solve specific (toy) problems (e.g., termes [56] and kilobots [30]).These examples have opened new research directions but not always resulted in reusable components to be borrowed in different contexts.”

• cites [56] sourceNot checked — no full text of the source
• cites [30] sourceDisputed

  The citing sentence uses this source as an example of kilobots, but Materials and Methods (“The task and the environment”; page unavailable) explicitly says the experiments used simulated foot-bot robots. The paper’s discussion of its robotics task does not establish the separate claim about whether components were reusable in other contexts. (LLM, conf=0.84)

  Checked by a reasoning model — may be wrong.

  Experimental — accuracy not yet measured

May combine two claims.

The kilobot was conceived to support the first demonstration of a large robot swarm designed for shape formation and has been later used for several successful studies, allowing swarm robotics to be demonstrated in physical settings with hundreds of robots.

“Kilobots were conceived to support the first demonstration of a large robot swarm designed for shape formation [31] and have been later used for several successful studies, allowing swarm robotics to be demonstrated in physical settings with hundreds of robots [32]- [34].”

• cites [30] sourceDisputed

  Split into 2 atoms — 0 confirmed, 0 partially supported, 1 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

  Checked by a reasoning model — may be wrong.

  Experimental — accuracy not yet measured
• cites [31] sourceNot checked — no full text of the source
• cites [32] sourceNot checked — no full text of the source

May combine two claims.

In the last two decades, swarm robotics has grown from a small domain initiated by a few studies with a clear biological inspiration to a mature research field involving several labs and researchers worldwide.

“In the last two decades, swarm robotics has grown from a small domain initiated by a few studies with a clear biological inspiration [9]- [12] to a mature research field involving several labs and researchers worldwide.”

• cites [9]Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

• cites [10] sourcePartly supported

  The Introduction says engineers drew inspiration from social insects to design swarm-robotics systems, supporting the biological-inspiration part of the cited clause. It does not say that the field began with a few studies or was initially a small domain. The citation appears before the sentence’s claim about later worldwide growth, which this paper also does not establish. (LLM, conf=0.83)

  Experimental — accuracy not yet measured
• cites [11]Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

May combine two claims.

Machine learning as a design methodology suffers from problems associated with the automatic design of robot swarms, additional constraints of online learning by trial and error, episodic rewards, and coordination problems.

“Machine learning as a design methodology suffers from the problems associated with the automatic design of robot swarms [44], with the additional constraints given by online learning of behaviors by trial and error [93], with episodic rewards and coordination problems.”

• cites [44]Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

• cites [93] sourceCould not verify

  The cited paper’s discussion (p. 3) describes a model of coordination in moving animal groups and suggests it may inform the design of grouping robots. It does not address online machine learning by trial and error or episodic rewards; searches for those terms found no supporting passage. In the citing sentence, the citation to this paper is attached specifically to the online-learning constraint. (LLM, conf=0.78)

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S4 (based).

As of today, only a few experiments have managed to demonstrate a large number of autonomous self-organizing robots.

“As a matter of fact, as of today, only a few experiments have managed to demonstrate a large number of autonomous self-organizing robots”

Probably not a substantial claim: may not pass S3 (load-bearing).

The Swarmanoid project extended the ideas and algorithms developed in Swarm-bots to heterogeneous robot swarms composed of three types of robots-flying, climbing, and ground-based-that collaborated to carry out a search and retrieval task.

“The Swarmanoid project (2006)(2007)(2008)(2009)(2010) extended the ideas and algorithms developed in Swarm-bots to heterogeneous robot swarms composed of three types of robots-flying, climbing, and ground-based-that collaborated to carry out a search and retrieval task [28], [29].”

• cites [28] sourceNot checked — no full text of the source
• cites [29] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).

The miniaturization of hardware will be a key element for experimentation in the lab with large swarms and for many future applications.

“Finally, it should be added that the miniaturization of hardware will be a key element for experimentation in the lab with large swarms and for many future applications.”

May combine two claims.

The e-puck is probably the most used swarm robotics platform to date, but research with more than 30 e-pucks remains complex and costly.

“The e-puck [37] is probably the most used swarm robotics platform to date, but research with more than 30 e-pucks remains complex and costly.”

• cites [37] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

While aquatic and underwater technologies still need substantial development efforts to become mature, drones are already commercialized and represent a very promising platform for remote sensing applications in different domains, being currently hindered only by the lack of a legal framework authorizing autonomous and group flight.

“While aquatic and underwater technologies still need substantial development efforts to become mature, drones are instead already commercialized and represent a very promising platform for remote sensing applications in different domains, being currently hindered only by the lack of a legal framework authorizing autonomous and group flight.”

May combine two claims.

These data show that, even though the swarm robotics research field finds its roots in a few seminal works published in the 1990s, it is only with the year 2000 that it started to significantly grow.

“These data show that, even though the swarm robotics research field finds its roots in a few seminal works published in the 1990s, it is only with the year 2000 that it started to significantly grow.”

May combine two claims.

Swarm robotics is not limited to ground platforms: recent work has considered aquatic surface and underwater robots, as well as swarms of flying drones.

“Swarm robotics is not limited to ground platforms: recent work has considered aquatic surface [38] and underwater robots [39], as well as swarms of flying drones [40], [41].”

• cites [38] sourceNot checked — no full text of the source
• cites [39] sourceNot checked — no full text of the source
• cites [40] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S2 (checkable).

Achieving swarm behavior in robots demands much more than simply applying swarm intelligence algorithms to existing robotic platforms.

“However, it has quickly become evident that achieving swarm behavior in robots demands much more than simply applying swarm intelligence algorithms to existing robotic platforms.”

May combine two claims.

The kilobot, being conceived for swarm robotics research, is widely used, but it is severely limited in its abilities, so much that virtualization environments have been proposed to increase the research possibilities.

“The kilobot, being conceived for swarm robotics research, is widely used, but it is severely limited in its abilities, so much that virtualization environments have been proposed to increase the research possibilities [59], [60].”

• cites [59] sourceNot checked — no full text of the source
• cites [60] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).

To date, research has only scratched the surface of a domain with huge potential (miniature robots).

“To date, research has only scratched the surface of a domain with huge potential.”

May combine two claims.

Hierarchies are observed in many animal societies and often coexist with self-organization.

“The introduction of some form of hierarchical control might also be justified by the fact that hierarchies are observed in many animal societies where they often go side by side with self-organization [86], [87].”

• cites [86] sourceNot checked — no full text of the source
• cites [87] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

Addressing the micro-macro problem-how to design the swarm behavior (macro-level), given we can only directly program the individual robots (micro-level) that compose the swarm-is probably the most difficult aspect to be considered.

“Indeed, the second lesson that we have learned is that addressing the micro-macro problem-how to design the swarm behavior (macro-level), given we can only directly program the individual robots (micro-level) that compose the swarm-is probably the most difficult aspect to be considered.”

Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

Although the collaboration between biologists and roboticists has been very fruitful, it has often been unidirectional, with robotics taking more than what it gave back to biology.

“It is also interesting to note that, although the collaboration between biologists and roboticists has been very fruitful, it has often been unidirectional, with robotics taking more than what it gave back to biology.”

May combine two claims.

The homogeneity assumption still pervades research in swarm robotics: all robots are identical and all run the same control software, they are all replaceable, and only the individual history of interactions with the (social) environment can lead to the expression of a somewhat specialized behavior.

“The homogeneity assumption still pervades research in swarm robotics: all robots are identical and all run the same control software, they are all replaceable, and only the individual history of interactions with the (social) environment can lead to the expression of a somewhat specialized behavior.”

Probably not a substantial claim: may not pass S4 (based). May combine two claims.

Microrobots and nanorobots are confronted with different physical laws than at the macroscopic scale, requiring novel models of collective behavior.

“Microrobots and nanorobots are confronted with different physical laws than at the macroscopic scale, requiring novel models of collective behavior.”

Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

The question of decentralization versus hierarchy, or of how to integrate these two aspects, is currently understudied.

“The question of decentralization versus hierarchy, or of how to integrate these two aspects, is currently understudied.”

Probably not a substantial claim: may not pass S2 (checkable).

It is unlikely that biological inspiration will be able alone to guide us when the behaviors required of the robot swarm become very application-specific.

“It is, therefore, unlikely that biological inspiration will be able alone to guide us when the behaviors required of the robot swarm become very application-specific.”

May combine two claims.

Integrating conventional ways of perception and action is extremely challenging, demanding a rethink of the strategies for designing and controlling such swarms.

“Also, integrating conventional ways of perception and action is extremely challenging [82], demanding a rethink of the strategies for designing and controlling such swarms.”

• cites [82] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based). May combine two claims.

Taming the complexity of the self-organized behavior displayed by heterogeneous entities is still very challenging but promises great advances for the domain as a whole.

“Taming the complexity of the self-organized behavior displayed by heterogeneous entities is, however, still very challenging but promises great advances for the domain as a whole.”

Probably not a substantial claim: may not pass S3 (load-bearing).

The problem known in robotics as the simulation-reality gap is that differences between the models used in simulation and their real-world counterparts cause a drop in performance when robot controllers developed in simulation are used in the real world.

“The problem, known in robotics as the simulation-reality gap [62], is that differences between the models used in simulation and their real-world counterparts cause a drop in performance when robot controllers developed in simulation are used in the real world.”

• cites [62] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S4 (based).

Current practices do not address providing performance guarantees sufficiently, being limited to empirical assessments of performance statistics.

“Finally, providing performance guarantees is very much needed, but current practices do not address this point sufficiently, being limited to empirical assessments of performance statistics.”

Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

How to command and control a swarm is extremely important, in order to let users interact with the robotic system in a meaningful and effortless way.

“How to command and control a swarm is also extremely important, in order to let users interact with the robotic system in a meaningful and effortless way.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Self-organizing processes in some wasp colonies lead to the formation of a linear hierarchy and the emergence of a single reproducing individual.

“This would be similar to what occurs in some wasp colonies where self-organizing processes lead to the formation of a linear hierarchy and the emergence of a single reproducing individual [87].”

• cites [87] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

The possibility of integrating autonomous robots into natural swarms offers novel research directions that are just starting to be explored.

“In addition, the possibility of integrating autonomous robots into natural swarms offers novel research directions that are just starting to be explored [18], [74]- [76].”

• cites [18] sourceNot checked — no full text of the source
• cites [74] sourceNot checked — no full text of the source
• cites [75] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

The homogeneity assumption stems from theoretical models of collective behavior, which often simplify a complex phenomenon to gain tractability.

“This assumption stems from theoretical models of collective behavior, which often simplify a complex phenomenon to gain tractability.”

May combine two claims.

Centralized or hierarchical control approaches would require machinery that makes the system vulnerable to a single point of failure and difficult to scale.

“Unfortunately, these approaches would require the introduction of machinery that would make the system vulnerable (single point of failure) and difficult to scale.”

May combine two claims.

Solutions that design the hardware to present self-organizing properties are plausible although, in this case, it may be difficult to obtain flexible and adaptive behavior.

“Solutions that design the hardware to present self-organizing properties are also plausible [83], [84] although, in this case, it may be difficult to obtain flexible and adaptive behavior.”

• cites [83] sourceNot checked — no full text of the source
• cites [84] sourceNot checked — no full text of the source

May combine two claims.

Crazyflies are also becoming very much used as flying platforms for swarm robotics studies even though they were not conceived for swarm robotics research.

“Crazyflies [61] are also becoming very much used as flying platforms for swarm robotics studies [41] even though they were not conceived for swarm robotics research.”

• cites [61] sourceNot checked — no full text of the source
• cites [41] sourceNot checked — no full text of the source

May combine two claims.

ARGoS allows the real-time dynamical simulation of up to 10 000 robots due to a clever modular design and the possibility to parallelize the simulation, and it includes the models of some of the most used robots in swarm robotics (e-pucks and kilobots).

“ARGoS [63] stands out for the native support to swarm robotics research.ARGoS allows the real-time dynamical simulation of up to 10 000 robots due to a clever modular design and the possibility to parallelize the simulation.Moreover, it includes the models of some of the most used robots in swarm robotics (e-pucks and kilobots).”

• cites [63] sourceNot checked — no full text of the source

May combine two claims.

Individuals within natural swarms can be very different from each other, both physically and behaviorally, with individual personalities affecting the response to environmental and social cues.

“However, individuals within natural swarms can be very different from each other, both physically and behaviorally, with individual personalities affecting the response to environmental and social cues [85].”

• cites [85] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S2 (checkable).

Translating theoretical findings into working robotic systems often requires a complete rethink of the approaches to introduce features and constraints not considered in the necessarily simplified theoretical models and to account for the specificity of the target application domain.

“However, translating theoretical findings into working robotic systems often requires a complete rethink of the approaches to introduce features and constraints not considered in the necessarily simplified theoretical models and to account for the specificity of the target application domain.”

Probably not a substantial claim: may not pass S3 (load-bearing).

A notable first step proposes hybrid systems where hierarchical control structures resulting from self-organizing processes can appear on the fly in an ad hoc manner.

“A notable first step in this direction [88] proposes to create hybrid systems where hierarchical control structures resulting from self-organizing processes can appear on the fly in an ad hoc manner.”

• cites [88]Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

Security against external attacks is needed to make swarms resilient to malicious users trying to sneak into and seize the swarm.

“Security against external attacks is needed to make swarms resilient to malicious users trying to sneak into and seize the swarm.”

Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

All these features (flexibility, adaptivity, resilience) would benefit robot swarms, but heterogeneity is not exploited as much as it should.

“All these features would benefit robot swarms, but heterogeneity is not exploited as much as it should.”

• AssumptionRests on an assumption: Heterogeneity is fundamental to grant collectives with flexibility of behavior, adaptivity to new conditions, and resilience to external perturbations.

Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

Robot swarms could truly help biologists, providing artificial, controllable models to study the effects of embodiment, perception, action, and the individual cognitive requirements necessary to support collective behavior.

“We believe that this situation can be improved and that robot swarms could truly help biologists, providing artificial, controllable models to study the effects of embodiment, perception, action, and the individual cognitive requirements necessary to support collective behavior [19], [73].”

• cites [19] sourceNot checked — no full text of the source
• cites [73] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S2 (checkable).

Providing other properties not intrinsically granted by self-organizing robot swarms, such as robustness, flexibility, or adaptivity, is even more difficult.

“The difficulties are even larger if one wants to provide other properties not intrinsically granted by self-organizing robot swarms, such as robustness, flexibility, or adaptivity (see the glossary in Table 1 for a definition of these terms).”

Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

Achieving and controlling collective behavior in such systems will require novel paradigms, as the ability to precisely governing the individual behavior will be forcedly limited.

“Achieving and controlling collective behavior in such systems will require novel paradigms, as the ability to precisely governing the individual behavior will be forcedly limited.”

Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

A high level of explainability is necessary to foster acceptance and trust of swarms by users and laypeople.

“This also requires a high level of explainability, which is necessary to foster acceptance and trust of swarms by users and laypeople.”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

Flightmare is a (multi-)UAV simulator capable of photorealistic rendering of the environment, useful for studies of visual navigation and remote sensing.

“Another interesting example is Flightmare [64], a (multi-)UAV simulator capable of photorealistic rendering of the environment, useful for studies of visual navigation and remote sensing.”

• cites [64] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

Both precision agriculture and infrastructure inspection happen in somewhat static environments.

“Both precision agriculture and infrastructure inspection happen in somewhat static environments (the crop field or the infrastructure to inspect).”

Probably not a substantial claim: may not pass S3 (load-bearing).

Research in robot swarm security is still in its infancy.

“Research in robot swarm security is still in its infancy.”

May combine two claims.

Robots sent out in space cannot be easily repaired or substituted, which is addressed by the swarm robotics focus on redundant systems where the failure of one robot causes only a graceful degradation of swarm performance.

“Robots that are sent out in space cannot be easily repaired or substituted, which is well addressed by the swarm robotics focus on redundant systems where the failure of one of the robots does cause only a graceful degradation of the swarm performance.”

May combine two claims.

These initial works allow addressing how to keep information in a swarm private, how to avoid disruption due to malicious robots, and how to counter Sybil attacks.

“These initial works allow to address issues such as how to keep information in a swarm private [98], [100], how to avoid disruption due to the presence of malicious robots [101], and how to counter Sybil attacks [99].”

• cites [98] sourceNot checked — no full text of the source
• cites [100] sourceNot checked — no full text of the source
• cites [101] sourceNot checked — no full text of the source

Classified as probably not a substantial claim.

The main difficulty in human-swarm interaction is that, with the swarm being self-organized, there is no clear entity with which a human could establish communication.

“The main difficulty is given by the fact that, with the swarm being self-organized, there is no clear entity with which a human could establish communication.”

May combine two claims.

Applications such as precision agriculture or infrastructure inspection and maintenance require dealing with an unstructured, unpredictable environment often covering extensive areas and can benefit from parallelization and collaboration between robots in a swarm.

“Conversely, applications such as precision agriculture or infrastructure inspection and maintenance require dealing with an unstructured, unpredictable environment-often covering extensive areas-and can benefit from parallelization and collaboration between robots in a swarm.”

Probably not a substantial claim: may not pass S4 (based). May combine two claims.

Swarm robotics is a young discipline and there are still many open research questions.

“However, this is a very difficult question, especially so given that swarm robotics is a young discipline and that, as discussed above, there are still many open research questions.”

Probably not a substantial claim: may not pass S2 (checkable).

The design of any human-swarm interaction solution will require an understanding of the psychological effects induced on humans who interact with a robot swarm in order to favor interaction modalities that reduce stress and improve usability and trust.

“The design of any HSI solution will also require an understanding of the psychological effects induced on humans who interact with a robot swarm in order to favor interaction modalities that reduce stress [111], [112] and improve usability and trust [113].”

• cites [111] sourceNot checked — no full text of the source
• cites [112] sourceNot checked — no full text of the source
• cites [113] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S4 (based).

There is a lack of working methodologies to move from problem specification to robot swarm implementation and deployment.

“Given the lack of working methodologies to move from problem specification to robot swarm implementation and deployment, in the following we discuss a few general guidelines that should direct the choice of swarm robotics solutions when dealing with a concrete application problem.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Initial work is investigating how traditional and less traditional approaches to security can be exploited either to add security layers or to be fully integrated in the control architecture of robot swarms.

“Initial work is investigating how traditional (e.g., cryptographic Merkle trees [98]) and less traditional (blockchain [99]) approaches to security can be exploited either to add security layers or to be fully integrated in the control architecture of robots swarms.”

• cites [98] sourceNot checked — no full text of the source
• cites [99] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

Although service robots are usually not organized as a swarm, the coordination of activities and allocation of tasks performed by each robot can be decentralized and self-organized to some extent.

“For instance, although service robots are usually not organized as a swarm, the coordination of activities and allocation of tasks performed by each robot can be decentralized and self-organized to some extent.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Current practice consists of evaluating the suitability of swarm robotics solutions on the basis of expected advantages with respect to other solutions, factoring in constraints imposed by available technologies.

“As a consequence, the current practice consists of evaluating the suitability of swarm robotics solutions on the basis of the expected advantages with respect to other solutions, factoring in the constraints imposed by available technologies.”

Probably not a substantial claim: may not pass S2 (checkable).

Direct control of a swarm by a user is complicated because understanding what the swarm is doing might be very challenging due to the multitude of interactions, which might be hard to read for a human observer.

“Direct control of a swarm by a user is complicated by the fact that understanding what the swarm is doing might be very challenging due to the multitude of interactions happening within the swarm, which might be hard to “read” for a human observer.”

Probably not a substantial claim: may not pass S4 (based).

As of today, the only prominent use of machine learning in swarm robotics has been the exploitation of evolutionary algorithms for developing simple neural controllers driving the behavior of individual robots in the swarm.

“As of today, the only prominent use of machine learning in swarm robotics has been the exploitation of evolutionary algorithms (see the glossary in Table 1) for the development of simple neural controllers driving the behavior of individual robots in the swarm.”

Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

The great interest in swarm robotics research recorded to date is due to the expected forthcoming ubiquity of autonomous robots in real-world applications and to the challenge of letting them cooperate with each other and with their human users while avoiding the pitfalls of centralized control.

“The great interest in swarm robotics research recorded to date [114]- [116] is due to the expected forthcoming ubiquity of autonomous robots in real-world applications and to the challenge of letting them cooperate with each other and with their human users avoiding the pitfalls of centralized control.”

• cites [114]- [116]Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

May combine two claims.

Interaction with a single machine or robot is a very well-studied problem, while interaction with a robot swarm opens completely new avenues.

“While the interaction with a single machine/robot is a very well-studied problem [102], the interaction with a robot swarm opens completely new avenues.”

• cites [102] sourceNot checked — no full text of the source

May combine two claims.

The application of robot swarms is sought by defense agencies worldwide, which find appealing a system that cannot be easily shut down.

“The application of robot swarms is sought by defense agencies worldwide, that find extremely appealing a system that cannot be easily shut down [127].”

• cites [127] sourceNot checked — no full text of the source