How Highly Integrated Robotic Actuators Enable Superior Robot Motion

Why Modern Robots Need Highly Integrated Actuators

As robots evolve from “being able to move” to achieving “high-performance motion,” the demands on real-time responsiveness, precision, and stability are rapidly increasing. Whether in humanoid robots, quadruped robots, or exoskeleton systems, the core challenge is no longer just completing movements, but achieving more natural, faster, and safer motion control.

In this process, traditional distributed actuation solutions are gradually exposing clear limitations: long control chains lead to increased latency, multi-module coordination raises system complexity, and it becomes difficult to stably implement advanced control algorithms such as force control and impedance control.

The emergence of highly integrated actuators is precisely aimed at solving these “system-level problems.” By moving the control loops inside the actuator, they significantly reduce signal latency, improve response speed, and greatly enhance overall control stability. This enables robots to achieve higher-frequency and more precise motion control, allowing them to maintain balance and perform complex movements in dynamic environments.

Therefore, robots are increasingly relying on highly integrated actuators because:

The performance bottleneck is gradually shifting from the “algorithm layer” to the “actuation system layer.”

What Is a Highly Integrated Robotic Actuator

A highly integrated robotic actuator is a modular power unit that integrates multiple core components into a single system, typically including:

• Motor (provides fundamental driving force)

• Gear reducer (increases torque output)

• Motor driver (enables precise current control)

• Sensors (such as encoders for position and velocity feedback)

• Control algorithms (enable current / velocity / position closed-loop control)

Compared with the traditional “motor + external driver + external sensors” architecture, a highly integrated actuator encapsulates all these functions into a compact module, achieving:

• Lower-latency local closed-loop control

• Higher system integration and reliability

• Simpler engineering deployment (plug-and-play)

From an engineering perspective, it is not only a form of hardware integration, but also an upgrade in system architecture—transforming complex control systems into standardized and reusable functional modules.

In modern robotics, highly integrated actuators are becoming the core power unit. By deeply integrating motors, reducers, drivers, and sensors, these actuators significantly improve system compactness and reliability, while reducing control latency and system complexity. This allows robots to achieve a better balance between performance and engineering implementation. In simple terms, the actuation system largely determines a robot’s torque capability, control precision, and dynamic response.

Under this technological trend, the “performance ceiling” of robots is being redefined.

As robots transition from “being able to move” to “being truly usable,” the limiting factor is no longer the mechanical structure itself, but the actuation system.

Especially in humanoid robots, quadruped robots, and exoskeleton devices, actuators must not only “drive motion,” but also simultaneously deliver:

• Power output

• Precise control

• Dynamic response

• Safe interaction

The CubeMars AK series of highly integrated actuators (AK60 / AK70 / AK80) was developed under this background, aiming to solve the limitations of traditional solutions in size, latency, and control complexity.

AK Series Robotic Actuator System: Full Coverage from Lightweight to High Load

The CubeMars AK series is not a single product, but a modular actuation system covering different load requirements.

Lightweight and High-Precision Actuators: AK60 Series

Positioning keywords: Lightweight / Compact / Precision control

Suitable for:

• Small robot joints

• Educational and research platforms

• Light-load robotic arms

Features:

• Compact size, easy integration

• High control precision

• Low energy consumption

Key advantage: Ideal for fine motion in space-constrained scenarios

AK60 Series Core Parameter Comparison

Balanced General-Purpose Actuators: AK70 Series

Positioning keywords: Versatile / Balanced / Dynamic performance

Suitable for:

• Quadruped robots

• Medium-sized robotic joints

• Mobile robots

Features:

●  Balanced torque and size

●  Excellent dynamic response

●  Strong stability

Summary advantage: Ideal for “dynamic motion + general development” scenarios

AK70 Series Core Parameter Comparison

High-Torque, High-Power Actuators: AK80 Series

Positioning keywords: High load / High power / Strong output

Suitable for:

• Humanoid robot hip joint motors

• Humanoid robot knee joint motors

• Exoskeleton systems

• Industrial robots

Features

• High torque output

• Enables complex motions such as jumping and load-bearing tasks

• Excellent force control performance

Summary advantage: Ideal for “load-bearing + high dynamic motion” scenarios

AK80 Series Core Parameter Comparison

How CubeMars Actuators Enable High-Performance Robotic Motion

High Torque Density: Breaking the Size Constraint

Traditional motors often face the limitation that “larger size → higher torque.” The AK series

overcomes this through:

• High-performance permanent magnet materials

• Optimized magnetic circuit design

• Improved slot fill factor and electromagnetic efficiency

Achieving: higher torque output in a smaller volume

Engineering significance:

• Reduces overall robot weight

• Improves energy efficiency

• Enhances motion agility

FOC (Field-Oriented Control): The Key to Smooth Motion

The AK series adopts advanced FOC control algorithms, implementing a three-loop control

system:

• Current loop

• Velocity loop

• Position loop

Benefits:

• Jitter-free start and stop

• Smooth acceleration and deceleration

• High-precision trajectory tracking

Compared to traditional control:

• Faster response (millisecond-level)

• Significantly improved control accuracy

High-Resolution Encoding System: Precise Motion Sensing

Built-in high-precision encoders enable:

• Real-time angle feedback

• High-resolution position detection

• Multi-turn absolute measurement (on some models)

Supporting advanced control:

• Torque control

• Impedance control

• Compliant control

Integrated Structure: From Component Assembly to System Optimization

The core advantage of the AK series lies in its high level of integration.

Traditional solution:

Motor + reducer + driver + encoder → separated

CubeMars solution:

Highly integrated actuator module

Engineering value::

• Reduced signal latency

• Improved system stability

• Simplified mechanical and electrical design

• Significantly shortened development cycle

  
  

How actuators are applied in different robotic scenarios

In robotics, “better specifications” do not equal “successful applications.” True value is proven in real-world scenarios such as medical, competition, and extreme environments.

The CubeMars AK series (AK60-6, AK70, AK80) has already been deployed in multiple real projects.

一、  Low-Cost Intelligent Prosthesis: How AK60-6 Improves Accessibility

Project background

A student team in Nepal developed a low-cost ankle-foot prosthesis to address the high cost and limited accessibility of prosthetics in developing countries.

Challenges:

• High cost

• Limited functionality

• Difficulty replicating natural gait

Solution:

• 3D-printed structure

• Human-motion-based control logic

• CubeMars AK60-6 actuator as core drive

Key contributions:

• High torque + high precision control

• Fast response

• High reliability

Results:

• Successful prototype development and validation

• Significant cost reduction

• Practical solution for developing regions

Core value:

High-performance actuators = key driver of accessible medical technology

二、  Mars Rover Competition: Reliable Drive in Extreme Environments

Project background

Toronto MetRobotics participated in the University Rover Challenge (URC), aiming to develop robots capable of operating in Mars-like environments.

Challenges:

• Complex terrain

• High-load mobility

• Long-duration operation

Solution:

• High torque output

• High reliability design

• Efficient energy use

Results:

• Achieved 2nd place in Canada in the URC competition

• Stable performance in harsh environments

Core value:

High reliability + high torque = sustained operation in extreme conditions

三、  Autonomous Rehabilitation Stretching Device

Project background

A patient with muscular dystrophy collaborated with a team to develop an autonomous calf stretching device for daily rehabilitation.

Challenges:

• Manual dependency

• Inconsistent training

• Low control precision

Solution:

• Smooth and safe motion control

• Real-time adjustment

• Low noise and high stability

Results:

• Automated rehabilitation

• Improved user experience

• Promoted home rehabilitation development

Core value:

Precision control + stability = medical-grade user experience

Summary of the core competitive advantages of the AK series robotic actuators

1、Performance advantages

• High torque density

• Fast response

• High precision

2、Engineering advantages

• Integrated design

• Easy integration

• Shorter development cycle

3、Application advantages

• Multi-scenario coverage

• Proven in real-world projects

Future Trends of Highly Integrated All-in-One Actuators

Robot actuation systems are evolving toward:

• Higher power density

• Lower latency control

• Smarter control (AI + force control)

• More standardized and modular solutions

CubeMars continues to iterate in this direction, driving robots from “functional” to “high-performance.”

Conclusion

From an industry perspective, robotics is evolving from a stage of functional realization to one of performance-driven competition. In this transition, the true factor that determines a robot’s upper performance limit is no longer just mechanical design or algorithm capability, but the performance and integration level of the actuation system itself.

Represented by the CubeMars AK series, highly integrated all-in-one actuators are redefining the design paradigm of robotic power systems:

• From discrete components → highly integrated systems

• From basic operation → high-performance motion

• From complex development → rapid deployment

From a product perspective, the AK series establishes a comprehensive actuator ecosystem:

• AK60: Lightweight + high-precision control

• Designed for fine motion, small joints, and research applications AK70: Balanced performance + dynamic response

• Ideal for quadruped robots and general motion control AK80: High torque + high load capacity

This product matrix not only covers a wide range of load and application requirements, but more importantly, it unifies control logic and system architecture. This enables developers to rapidly transfer and reuse solutions across different robotic platforms, significantly improving R&D efficiency.

From an engineering standpoint, the value of highly integrated actuators goes far beyond parameter improvements—it represents a leap in system-level capability:

• Lower latency → enabling true real-time control

• Higher integration → reducing system failure points

• Greater consistency → improving overall system stability

• Simplified development → shortening time-to-market

In real-world applications—whether low-cost medical prosthetics, Mars exploration robots, or rehabilitation devices—these cases demonstrate one key fact:

High-performance actuators are becoming the critical infrastructure that enables robots to move from the laboratory into the real world.

Looking ahead, the evolution of robotic actuation systems is becoming increasingly clear:

• Higher power density (smaller size, greater output)

• Lower control latency (millisecond-level or beyond)

• Smarter control (integration of force control and AI)

• More standardized modules (true plug-and-play systems)

Through continuous iteration of the AK series, CubeMars is driving robots forward—from simply being able to move, to moving better, and ultimately to moving more like humans.