**5. Conclusions**

Research progress in human-robot collaboration and the application of robot simulations toward industry 4.0 have been discussed in this chapter. The key components of collaborative robot in industrial applications are elaborated with various robot types that exist today. Indeed, the collaborative robots can be designed, modeled, and realized in computer simulation using open dynamic engine such as Marilou AnyKode. This virtual robot can serve as a testbed for different purposes from controller design implementation, robot interactions, to validation of robot in specific environment scenarios. Although existing robot simulation packages are equipped with many actuators and embedded sensors that support for application in collaborative robots, the simulation of collaborative robot is still rare to discuss in literature. Since the practical industrial application of full-body humanoid robot in the industry probably still has a long way to go, thus robot simulations can be a better choice for developing different types of robots for future applications, in particular in areas of human-robot collaboration and human-robot interaction for industrial application and home services. Another opportunity lies in virtual reality of humanrobot interaction, implementation of artificial intelligence in virtual robots, and synthesizing control algorithm for different robotic configurations.

## **Conflict of interest**

The author declares that there are no conflicts of interest in this work. All works from other resources in the article have been cited carefully.
