The Movement-Related Cortical Activities under the Virtual Environment with Force Feedback

2015 ◽  
Author(s):  
Huang-Ren Chen ◽  
Shih-Ching Yeh ◽  
Kai-Chiun Li ◽  
Chun-Chuan Chen
Keyword(s):  
Virtual Environment ◽  
Force Feedback

X-Wing: Propeller-Based Force Feedback to Head in a Virtual Environment

2021 ◽  
Author(s):  
Koki Watanabe ◽  
Fumihiko Nakamura ◽  
Kuniharu Sakurada ◽  
Theophilus Teo ◽  
Maki Sugimoto
Keyword(s):  
Virtual Environment ◽  
Force Feedback

A Virtual Environment for the Simulation and Programming of Excavation Trajectories

2001 ◽  
Vol 10 (5) ◽  
pp. 465-476 ◽  
Author(s):  
Simon P. DiMaio ◽  
Septimiu E. Salcudean ◽  
Claude Reboulet
Keyword(s):  
Virtual Environment ◽  
Force Feedback ◽  
Control Strategies ◽  
Haptic Interface ◽  
Visual Environment ◽  
Heavy Duty ◽  
Interaction Forces ◽  
Impedance Model ◽  
Hydraulic Machines ◽  
Human Operators

An excavator simulator has been developed to facilitate the training of human operators and to evaluate control strategies for heavy-duty hydraulic machines. The operator controls a virtual excavator by means of a joystick while experiencing visual and force feedback generated by environment and machine models. The simulator comprises an impedance model of the excavator arm, a model for the bucket-ground interaction forces, a graphically rendered visual environment, and a haptic interface. This paper describes the simulator components and their integration.

Generation of Character Motion by Using Reactive Motion Capture System with Force Feedback

2008 ◽  
Vol 12 (2) ◽  
pp. 116-124
Author(s):  
Woong Choi ◽  
◽  
Naoki Hashimoto ◽  
Ross Walker ◽  
Kozaburo Hachimura ◽  
...  
Keyword(s):  
Virtual Environment ◽  
Motion Capture ◽  
Force Feedback ◽  
Task Environment ◽  
Motion Capture System ◽  
Motion Generation ◽  
Motion Data ◽  
Human Scale ◽  
Real Objects ◽  
Motion Capture Systems

Creating reactive motions with conventional motion capture systems is difficult because of the different task environment required. To overcome this drawback, we developed a reactive motion capture system that combines conventional motion capture system with force feedback and a human-scale virtual environment. Our objective is to make animation with reactive motion data generated from the interaction with force feedback and the virtual environment, using the fact that a person’s motions in the real world can be represented by the reactions of the person to real objects. In this paper we present the results of some animations made under various scenarios using animating reactive motion generation with our reactive motion capture system. Our results demonstrate that the reactive motion generated by this system was useful for producing the animation including scenes of reactive motion.

Development of Haptic-Enabled Virtual Reality Applications for Engineering, Medicine and Art

2015 ◽  
Author(s):  
Hugo I. Medellín-Castillo ◽  
Germánico González-Badillo ◽  
Eder Govea ◽  
Raquel Espinosa-Castañeda ◽  
Enrique Gallegos
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
Force Feedback ◽  
Research Work ◽  
Three Dimensional ◽  
Haptic Device ◽  
The Other ◽  
Virtual Objects ◽  
Other Hand ◽  
And Training

The technological growth in the last years have conducted to the development of virtual reality (VR) systems able to immerse the user into a three-dimensional (3D) virtual environment where the user can interact in real time with virtual objects. This interaction is mainly based on visualizing the virtual environment and objects. However, with the recent beginning of haptic systems, the interaction with the virtual world has been extended to also feel, touch and manipulate virtual objects. Virtual reality has been successfully used in the development of applications in different scientific areas ranging from basic sciences, social science, education and entertainment. On the other hand, the use of haptics has increased in the last decade in domains from sciences and engineering to art and entertainment. Despite many developments, there is still relatively little knowledge about the confluence of software, enabling hardware, visual and haptic representations, to enable the conditions that best provide for an immersive sensory environment to convey information about a particular subject domain. In this paper, the state of the art of the research work regarding virtual reality and haptic technologies carried out by the authors in the last years is presented. The aim is to evidence the potential use of these technologies to develop usable systems for analysis and simulation in different areas of knowledge. The development of three different systems in the areas of engineering, medicine and art is presented. In the area of engineering, a system for the planning, evaluation and training of assembly and manufacturing tasks has been developed. The system, named as HAMS (Haptic Assembly and Manufacturing System), is able to simulate assembly tasks of complex components with force feedback provided by the haptic device. On the other hand, in the area of medicine, a surgical simulator for planning and training orthognathic surgeries has been developed. The system, named as VOSS (Virtual Osteotomy Simulator System), allows the realization of virtual osteotomies with force feedback. Finally, in the area of art, an interactive cinema system for blind people has been developed. The system is able to play a 3D virtual movie for the blind user to listen to and touch by means of the haptic device. The development of these applications and the results obtained from these developments are presented and discussed in this paper.

Stability Control of Haptic Interface

2007 ◽  
Author(s):  
Jisheng Zhang ◽  
Jiting Li ◽  
Mileta M. Tomovic ◽  
Yuru Zhang
Keyword(s):  
Virtual Environment ◽  
Pid Control ◽  
Closed Loop ◽  
Force Feedback ◽  
Control Method ◽  
Stability Control ◽  
Haptic Device ◽  
System Stability ◽  
Haptic Devices ◽  
Loop Equation

Haptic devices and man-machine interaction have attracted intense research interest in recent years due to numerous potential applications, including medical, dental, military, and nuclear. One of the challenges involved with haptic devices is providing human operator realistic sensory feeling through force feedback output from the haptic device. In order to acquire adequate fidelity, the stiffness of the virtual environment must be sufficiently large. However, this is typically accompanied with vibration of the haptic device. Hence, one of the key issues related to haptic systems is to ensure system’s stability. Although some effort has been done to address this issue, this is so far an unresolved problem. This paper presents current closed-loop PID control method for achieving system stability on the example of one-degree-of-freedom haptic device. In order to identify parameters of the PID controller, the control system is first modeled and the equation of the current closed-loop PID control is formulated. Then, by generalizing the relationship between the motor output torque and the virtual force at the output end of the device, the current closed-loop equation is transferred into that of the force. In addition, the paper analyzes the robustness of PID controlled haptic device. To validate the method, three simulation experiments are performed, with spring model, damper model, and spring damper model. The results show that there is a set of PID parameters which result in stable haptic device. One of the advantages of the proposed method is that it can regulate PID parameters to fit different virtual environment. This provides a fundamental approach to improve stability of haptic systems. In addition, the proposed method can be embedded in the software.

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