A humanoid robot is a machine that resembles and behaves like people. These robots are designed to move and act, and do things in spaces that were originally created for people.
Humanoid robots are gaining importance with their walking and grasping capabilities, as well as communicative ones. This guide unpacks how they work, what they are made of, and the trade-offs involved in their use.
What is a Humanoid Robot?
Humanoid robots are humanoid machines that have a bipedal form, similar to that of humans, and are intended to operate with people. They would be able to “see” and do things like lift, transport objects, or carry packages in real-world situations.
They are built not only to look human, but also to work in human environments and perform tasks where being adaptive and working around humans is important.
In robotics, a humanoid robot is generally considered to be one with a solid body, a head, two legs, and arms. But significance is not just form. These robots include:
Human-like locomotion: A suite of actuators, sensors, and a control system that can result in walking, manipulation, and interaction.
Interactivity: They can adapt to surroundings, recognize speech, and identify faces using AI.
Design: Their design to mimic humans allows them to interact with humans and their surroundings.
How Do Humanoid Robots Work?
In the modern world, humanoid robots highly depend on artificial intelligence to carry out tasks or interact with humans. To navigate and process their surroundings, they use sensors and software.
These humanoids are initially trained in simulation, where they practice movements and responses before they carry them out in real-world situations. The simulation prepares the humanoid to handle unpredictable situations.
Once the humanoid finished training, AI is installed in their onboard computer and integrated with sensors and motion systems to help them perform tasks. The humanoid robot’s main purpose and advantage are to interact with humans in workspaces without intensive training.
Key Components of Humanoid Robots
For a humanoid to function smoothly, it depends on systems to operate and carry out tasks.
Mechanical Structure
A humanoid’s structural frame resembles a human body frame with a head, torso, arms, and legs. These robotic parts are lightweight but made of strong materials. They are usually made with aluminum and carbon fiber. Motors and actuators serve as joints and muscles to help them move.
Sensors and Perception Systems
Humanoids have sensors and perception systems that allow them to navigate and assess their surroundings. Sensors help them detect movements. Cameras help them see and navigate, and microphones help them recognize sound and speech. They also have sensors in their hands to help them safely grip objects. To maintain balance, IMUs use gyroscopes and accelerometers.
Control Systems
The humanoid’s central processor serves as the brain. It analyzes what the sensor says and initiates movement. Modern algorithms give the humanoid the capability to adapt to its surroundings.
Power Supply
Batteries such as rechargeable lithium-ion power humanoid robots. They balance the efficiency and function of robots to operate at a given time with a fully charged battery.
Types of Humanoids
There are various types of humanoid robots depending on their systems and the tasks they can carry out. The main categories consist of two types: the leg-based and the wheel-based.
Leg-Based Humanoids
Leg-based humanoids are designed to move like humans. From the term itself, they have legs that allow them to walk and move like humans, so they can carry out tasks that need them to navigate their surroundings through human-like motion.
Bipedal Robots
This type walks on two legs, basically like a human who can move around with balance. An example of this is the Unitree Robotics’ G1.
Quadrupedal Hybrids
This type may have more than two legs, as the name suggests, but this four-legged humanoid has the stability of a human-like upper structure.
Wheel-Based Humanoids
Wheel-based humanoids are robots that function on flat surfaces because they need to sustain their balance with their wheels to move around and carry out tasks.
Hybrid Platforms
The hybrid type is a half-humanoid upper body and half-wheeled robot that supports speed and efficiency. A balance in the strong human-like structure, plus the convenience of wheels for added speed, makes it a winning combination.
Task-Specific Designs
This type is mostly used in predictable environments where speed is more important than human-like balance in walking.
How Do You Train Humanoid Robots?
Humanoid training requires simulation, modern algorithms, and real-world applications. These trainings allow humanoids to practice walking, gripping, and interacting with humans.
It is a task for developers to integrate AI systems, data processing, and simulation scenarios to train the robots effectively. Virtual simulations often work for humanoids to train without the risk of damage. During these simulations, developers can introduce sounds and scenarios that robots may learn from. Here are some training methods:
Machine Learning
Algorithms are in place to help them analyze data from a past scenario to help them in real-time decision-making
Imitation Learning
Robots mimicking human movements and actions are recorded and saved by their cameras and sensors so they can learn tasks that require complex motion and processing.
Reinforcement Learning
This type of learning is a reward and penalty system based on their appropriate actions and errors. This learning improves performance in the long run.
These trainings are like skills refining stimulations where they can enhance their skills to effectively do their tasks in real-life applications and situations.
How Do Humanoid Robots Move?
Through bipedal locomotion and robotic arms and legs, a humanoid’s motion highly depends on precision and balance.
Locomotion (Walking and Balance)
To enable stable walking, and even more complex motions like running or jumping, robots balance their center of mass and hip movement to avoid going off-balance. One system that uses feedback loops to copy human balance is called Little HERMES.
Manipulation (Gripping and Precision)
Gripping and manipulation mechanisms are enhanced by robotic hands like the Shadow Dextrose Hand. The delicate gripping mechanism for holding objects is enhanced by tendon motors. Developers also use artificial intelligence to improve balance, strength, and flexibility to efficiently perform tasks.
Motion Control Algorithms
The early models of robots were moving with stiff joints. The modern ones we have move can control whole body motion and human-like movement thanks to their predictive learning. Some examples are the Tesla Optimus, capable of walking and gripping with AI-powered control, the Boston Dynamics’ Atlas, which is capable of complex movements such as parkour, and the Engineered Arts’ Ameca, which can mimic gestures and expressions.
Benefits of Humanoid Robots
Human-Robot Interaction
Their ability to interact and work side by side with humans in various workspaces and environments makes work collaboration easier and more convenient for both humans and humanoids.
Versatility and Adaptability
They can use tools and equipment already made for humans.
It’s still amusing to see a robot able to use tools that are made for humans. The ability to adapt to environments and tasks is helpful to increase productivity in the workplace.
Productivity
Helping with routine tasks increases productivity when humanoids can deliver efficiency in tasks. Because of their programmed movements, it can even minimize errors.
Enhanced Safety
When robots perform risky tasks, it reduces human accidents in the workplace. Reduces human labor’s exposure to risky situations.
Humanoid Robots Applications
Manufacturing
Humanoids’ deployment to factories to assist with assembly, packing, and other repetitive tasks. The humanoid’s flexibility and efficiency increase productivity and minimize errors.
Warehouse and Logistics
Repetitive tasks like packing, inventory, or even delivery can make use of humanoids as a helpful coworker in warehouse and logistics applications.
Healthcare
Humanoids’ assistance in facility operations and even patient care are vital applications of humanoids in the healthcare industry.
Home Assistants
Busy homes with no one to take charge of chores are one of the common applications of humanoids. Here, they can do chores and carry out daily routines while having the ability to communicate with the humans in the house.
Customer Service
Busy establishments can utilize humanoids to assist and guide customers by organizing queues, giving directions, or even managing public services effectively.
Challenges to Developing Humanoid Robots
Though humanoids offer a variety of benefits, developing such a helpful smart machine can be challenging too.
Limited Training Data
Human movements are based on scenarios that often happen in real-life environments and not just simulations. This makes it difficult to collect data that the robot can adapt and learn from while training.
Design
The design itself is a pattern because it highly depends on how powerful and efficient you want the robot to be. Not to mention the software integrated in each robot to ensure its intelligence and processing capabilities.
Energy Efficiency
Limitations in terms of power use may limit a robot’s functionality. When a robot can only stand functioning for a few hours when fully charged, you may need to charge it again to use it, and that means downtime for the tasks.
Degrees of Freedom
An optimized degree of freedom helps humanoids perform more tasks as they are able to move more like humans. But this may complicate the coordination of mechanical and control systems. A comprehensive system must be in place to ensure balance in both.
Functional Safety in Humanoid Robots
Safe robot means safe operations, which is why safety is always a crucial factor in humanoid deployment in industries.
Traditional Functional Safety
Traditional functional safety ensures balance in both the structure and system of robots to ensure smooth operations.
Robotics Safety
Integrating emergency stop mechanisms is important to avoid accidents during unforeseen malfunctions.
Collaborative Safety
The robot must have the ability to adapt to human presence in the workplace to ensure collaborative success.
Sensor Safety
Humanoids’ ability to sense their surroundings is essential, which is why testing their sensors must be a part of the safety practice.
AI Safety
Prevents errors from misinterpreting data.
Artificial intelligence is a great help, but it may fail in humanoids when they encounter errors, when the data collected is misinterpreted. There are standards like IEC 61508, ISO 13849, and ANSI/RIA R15.606 that ensure that AI is effectively integrated in robots.
Humanoid Robots vs Industrial Robots
Humanoids are designed to mimic human functions, which is why they are designed with a human-like structure. The head, torso, arms, and legs help them love like humans.
Industrial robots, on the other hand, are built for tasks that are usually fixed and programmed. They are designed to do repetitive work in one location without the need for complex locomotive skills.
Conclusion
Humanoid robots play a significant role in the future of robotics. It utilizes the combination of human-like structure and movements while incorporating advanced technology to carry out complex tasks in various human-centered workspaces.
Whether you are a beginner exploring humanoid robots that can support your startup or a developer who wants to take your robotic journey to a whole new level, RobotCNCParts provides engineering and manufacturing expertise to help you with your humanoid project. Contact us today so we can get started.
