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Envisioning the future of robotics

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16 March 2017



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Image: Ryan Etter

Robotics is said to be the next technological revolution. Many seem to agree that robots will have a tremendous impact over the following years, and some are heavily betting on it. Companies are investing billions buying other companies, and public authorities are discussing legal frameworks to enable a coherent growth of robotics.

Understanding where the field of robotics is heading is more than mere guesswork. While much public concern focuses on the potential societal issues that will arise with the advent of robots, in this article, we present a review of some of the most relevant milestones that happened in robotics over the last decades. We also offer our insights on feasible technologies we might expect in the near future.

Copyright © Acutronic Robotics 2017. All Rights Reserved.


Pre-robots and first manipulators

What’s the origin of robots? To figure it out we’ll need to go back quite a few decades to when different conflicts motivated the technological growth that eventually enabled companies to build the first digitally controlled mechanical arms. One of the first and well documented robots was UNIMATE (considered by many the first industrial robot): a programmable machine funded by General Motors, used to create a production line with only robots. UNIMATE helped improve industrial production at the time. This motivated other companies and research centers to actively dedicate resources to robotics, which boosted growth in the field.


Sensorized robots

Sensors were not typically included in robots until the 70’s. Starting in1968, a second generation of robots emerged that integrated sensors. These robots were able to react to their environment and offer responses that met varying scenarios.

Relevant investments were observed during this period. Industrial players worldwide were attracted by the advantage that robots promised.


Worldwide industrial robots:  Era of the robots

Many consider that the Era of Robots started in 1980. Billions of dollars were invested by companies all around to world to automate basic tasks in their assembly lines. Sales of industrial robots grew 80% above the previous years’.

Key technologies appeared within these years: General internet access was extended in 1980; Ethernet became a standard in 1983 (IEEE 802.3); the Linux kernel was announced in 1991; and soon after that real-time patches started appearing on top of Linux.

The robots created between 1980 and 1999 belong to what we call the third generation of robots: robots that were re-programmable and included dedicated controllers. Robots populated many industrial sectors and were used for a wide variety of activities: painting, soldering, moving, assembling, etc.

By the end of the 90s, companies started thinking about robots beyond the industrial sphere. Several companies created promising concepts that would inspire future roboticists. Among the robots created within this period, we highlight two:

  1. The first LEGO Mindstorms kit (1998): a set consisting of 717 pieces including LEGO bricks, motors, gears, different sensors, and a RCX Brick with an embedded microprocessor to construct various robots using the exact same parts. The kit allowed the learning of  basic robotics principles. Creative projects have appeared over the years showing the potential of interchangeable hardware in robotics. Within a few years. the LEGO Mindstorms kit became the most successful project that involved robot part interchangeability.
  2. Sony’s AIBO (1999): the world’s first entertainment robot. Widely used for research and development, Sony offered robotics to everyone in the form of a $1,500 robot that included a distributed hardware and software architecture. The OPEN-R architecture involved the use of modular hardware components — e.g. appendages that can be easily removed and replaced to customize the shape and function of the robots — and modular software components that could be interchanged to modify their behavior and movement patterns. OPEN-R inspired future robotic frameworks, and minimized the need for programming individual movements or responses.

Integration effort was identified as one of the main issues within robotics, particularly related to industrial robots. A common infrastructure typically reduces the integration effort by facilitating an environment in which components can be connected and made to interoperate. Each of the infrastructure-supported components are optimized for such integration at their conception, and the infrastructure handles the integration effort. At that point, components could come from different manufacturers (yet when supported by a common infrastructure, they will interoperate).

Sony’s AIBO and LEGO’s Mindstorms kit were built upon this principle, and both represented common infrastructures. Even though they came from the consumer side of robotics, one could argue that their success was strongly related to the fact that both products made use of interchangeable hardware and software modules. The use of a common infrastructure proved to be one of the key advantages of these technologies, however those concepts were never translated to industrial environments. Instead, each manufacturer, in an attempt to dominate the market, started creating their own “robot programming languages”.


The dawn of smart robots

Starting from the year 2000, we observed a new generation of robot technologies. The so-called fourth generation of robots consisted of more intelligent robots that included advanced computers to reason and learn (to some extend at least), and more sophisticated sensors that helped controllers adapt themselves more effectively to different circumstances.

Among the technologies that appeared in this period, we highlight the Player Project (2000, formerly the Player/Stage Project), the Gazebo simulator (2004) and the Robot Operating System (2007). Moreover, relevant hardware platforms appeared during these years. Single Board Computers (SBCs), like the Raspberry Pi, enabled millions of users all around the world to create robots easily.


The boost of bio-inspired artificial intelligence

The increasing popularity of artificial intelligence, and particularly neural networks, became relevant in this period as well. While a lot of the important work on neural networks happened in the 80’s and in the 90’s, computers did not have enough computational power at the time. Datasets weren’t big enough to be useful in practical applications. As a result, neural networks practically disappeared in the first decade of the 21st century. However, starting from 2009 (speech recognition), neural networks gained popularity and started delivering good results in fields such as computer vision (2012) or machine translation (2014). Over the last few years, we’ve seen how these techniques have been translated to robotics for tasks such as robotic grasping. In the coming years, we expect to see these AI techniques having more and more impact in robotics.


What happened to industrial robots?

Relevant key technologies have also emerged from the industrial robotics landscape (e.g.: EtherCAT). However, except for the appearance of the first so-called collaborative robots, the progress within the field of industrial robotics has significantly slowed down when compared to previous decades. Several groups have identified this fact and written about it with conflicting opinions. Below, we summarize some of the most relevant points encountered while reviewing previous work:

  • The Industrial robot industry :  is it only a supplier industry?
    For some, the industrial robot industry is a supplier industry. It supplies components and systems to larger industries, like manufacturing. These groups argue that the manufacturing industry is dominated by the PLC, motion control and communication suppliers which, together with the big customers, are setting the standards. Industrial robots therefore need to adapt and speak factory languages (PROFINET, ETHERCAT, Modbus TCP, Ethernet/IP, CANOPEN, DEVICENET, etc.) which for each factory, might be different.
  • Lack of collaboration and standardized interfaces in industry
    To date, each industrial robot manufacturer’s business model is somehow about locking you into their system and controllers. Typically, one will encounter the following facts when working with an industrial robot: a) each robot company has its own proprietary programming language, b) programs can’t be ported from one robot company to the next one, c) communication protocols are different, d) logical, mechanical and electrical interfaces are not standardized across the industry. As a result, most robotic peripheral makers suffer from having to support many different protocols, which requires a lot of development time that reduces the functionality of the product.
  • Competing by obscuring vs opening new markets?
    The closed attitude of most industrial robot companies is typically justified by the existing competition. Such an attitude leads to a lack of understanding between different manufacturers. An interesting approach would be to have manufacturers agree on a common infrastructure. Such an infrastructure could define a set of electrical and logical interfaces (leaving the mechanical ones aside due to the variability of robots in different industries) that would allow industrial robot companies to produce robots and components that could interoperate, be exchanged and eventually enter into new markets. This would also lead to a competitive environment where manufacturers would need to demonstrate features, rather than the typical obscured environment where only some are allowed to participate.

The Hardware Robot Operating System (H-ROS)

For robots to enter new and different fields, it seems reasonable that they need to adapt to the environment itself. This fact was previously highlighted for the industrial robotics case, where robots had to be fluent with factory languages. One could argue the same for service robots (e.g. households robots that will need to adapt to dish washers, washing machines, media servers, etc.), medical robots and many other areas of robotics. Such reasoning lead to the creation of the Hardware Robot Operating System (H-ROS), a vendor-agnostic hardware and software infrastructure for the creation of robot components that interoperate and can be exchanged between robots. H-ROS builds on top of ROS, which is used to define a set of standardized logical interfaces that each physical robot component must meet if compliant with H-ROS.

H-ROS facilitates a fast way of building robots, choosing the best component for each use-case from a common robot marketplace. It complies with different environments (industrial, professional, medical, …) where variables such as time constraints are critical. Building or extending robots is simplified to the point of placing H-ROS compliant components together. The user simply needs to program the cognition part (i.e. brain) of the robot and develop their own use-cases, all without facing the complexity of integrating different technologies and hardware interfaces.


The future ahead

With latest AI results being translated to robotics, and recent investments in the field, there’s a high anticipation for the near future of robotics.

As nicely introduced by Melonee Wise in a recent interview, there’s still not that many things you can do with a $1000-5000 BOM robot (which is what most people would pay on an individual basis for a robot). Hardware is still a limiting factor, and our team strongly believes that a common infrastructure, such as H-ROS, will facilitate an environment where robot hardware and software can evolve.

The list presented below summarizes, according to our judgement, some of the most technically feasible future robotic technologies to appear.


Acknowledgments

This review was funded and supported by Acutronic Robotics, a firm focused on the development of next-generation robot solutions for a range of clients.

The authors would also like to thank the Erle Robotics and the Acutronic groups for their support and help.


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Víctor Mayoral Vilches is one of the founders of Erle Robotics and an ex-researcher in the field of robotics...
Víctor Mayoral Vilches is one of the founders of Erle Robotics and an ex-researcher in the field of robotics...





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