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Human Motion Simulation

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Human Motion Simulation

Human Motion Simulation Book
Author : Karim Abdel-Malek,Jasbir Arora
Publisher : Academic Press
Release : 2013-05-30
ISBN : 0124046010
Language : En, Es, Fr & De

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Book Description :

Simulate realistic human motion in a virtual world with an optimization-based approach to motion prediction. With this approach, motion is governed by human performance measures, such as speed and energy, which act as objective functions to be optimized. Constraints on joint torques and angles are imposed quite easily. Predicting motion in this way allows one to use avatars to study how and why humans move the way they do, given specific scenarios. It also enables avatars to react to infinitely many scenarios with substantial autonomy. With this approach it is possible to predict dynamic motion without having to integrate equations of motion -- rather than solving equations of motion, this approach solves for a continuous time-dependent curve characterizing joint variables (also called joint profiles) for every degree of freedom. Introduces rigorous mathematical methods for digital human modelling and simulation Focuses on understanding and representing spatial relationships (3D) of biomechanics Develops an innovative optimization-based approach to predicting human movement Extensively illustrated with 3D images of simulated human motion (full color in the ebook version)

Memory based Human Motion Simulation

Memory based Human Motion Simulation Book
Author : Woojin Park
Publisher : Unknown
Release : 2003
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Memory based Human Motion Simulation book written by Woojin Park, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

A Three Dimensional Human Motion Simulation System

A Three Dimensional Human Motion Simulation System Book
Author : Michael Steven Goodrow
Publisher : Unknown
Release : 1985
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download A Three Dimensional Human Motion Simulation System book written by Michael Steven Goodrow, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

A Multibody Simulation Framework for Real time Human Motion Tracking and Analysis Within the Unity Environment

A Multibody Simulation Framework for Real time Human Motion Tracking and Analysis Within the Unity Environment Book
Author : John Richard Von Possel Abella
Publisher : Unknown
Release : 2019
ISBN : 9781085576628
Language : En, Es, Fr & De

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Book Description :

Abstract: There is increasing interest in performing real-time human motion analysis to provide immediate feedback for clinical, sports, and rehabilitation purposes. In this thesis, we present a multibody simulation framework within the Unity environment that can be used for real-time human motion analysis. The framework incorporates musculoskeletal models derived from OpenSim and combines concepts from robotics and biomechanics to derive closed-form definitions for muscle-routing kinematics and kinematic Jacobians. The framework also uses efficient motion decomposition and reconstruction algorithms to track motion in joint space. To demonstrate the performance of the framework, two live-motion simulation experiments were conducted. The first experiment investigated the behavior of the adopted motion reconstruction algorithms by tracking a jogging motion, while the second experiment involved the calculation of the muscular effort values of three different bicep curl forms. In both test simulations, motion tracking and motion analysis were performed simultaneously. For the more computationally expensive second experiment, the simulation update rate averaged to about 105 Hz.

Development of Marker based Human Motion Capture Systems for Assembly Simulation and Ergonomic Analysis

Development of Marker based Human Motion Capture Systems for Assembly Simulation and Ergonomic Analysis Book
Author : Sajeev C. Puthenveetil
Publisher : Unknown
Release : 2013
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

"In aerospace industry, the assembly operator is often exposed to potential ergonomic injuries due to awkward postures while working in confined spaces. Manually generating worker postures in simulation software for ergonomic analysis is cumbersome. This research focuses on the use of marker-based optical motion capture technology to generate human motion simulations in real-time for ergonomic analysis. To address the challenges involved in capturing human motions in a real work environment, an assembly operation was simulated in a four-walled Computer Automated Virtual Environment (CAVE) which provides an immersive 3D environment to the worker performing the assembly operation. Multiple cameras were set-up to capture motion data during fastening operation on a physical fuselage mock-up model as well as during virtual fastening developed using the CAVE. To facilitate the setting up of a portable turn-key motion capture system, a methodology for placing multiple cameras was developed. The process of transforming body joint coordinates of the human skeleton model in the motion capture system to the digital human model used for ergonomic analysis is explained. Anomalies in human motion simulation during motion capture were identified and corrected in real-time using anatomical body joint limits and a Kalman filter based predictive filtering algorithm, without the need for post-processing of motion data. The developed system has been demonstrated for human motion capture, graphic simulation and ergonomic analysis of fastening operation on a physical mock-up model and also virtual model of the belly section of an aircraft fuselage"--Abstract, leaf iii.

Simulation of Human Motion Data Using Short horizon Model predictive Control

Simulation of Human Motion Data Using Short horizon Model predictive Control Book
Author : Marco Jorge Tome da Silva
Publisher : Unknown
Release : 2008
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Many data-driven animation techniques are capable of producing high quality motions of human characters. Few techniques, however, are capable of generating motions that are consistent with physically simulated environments. Physically simulated characters, in contrast, are automatically consistent with the environment, but their motions are often unnatural because they are difficult to control. We present a model-predictive controller that yields natural motions by guiding simulated humans toward real motion data. During simulation, the predictive component of the controller solves a quadratic program to compute the forces for a short window of time into the future. These forces are then applied by a low-gain proportional-derivative component, which makes minor adjustments until the next planning cycle. The controller is fast enough for interactive systems such as games and training simulations. It requires no precomputation and little manual tuning. The controller is resilient to mismatches between the character dynamics and the input motion, which allows it to track motion capture data even where the real dynamics are not known precisely. The same principled formulation can generate natural walks, runs, and jumps in a number of different physically simulated surroundings.

Modeling Vehicle Ingress and Egress Using the Human Motion Simulation Framework

Modeling Vehicle Ingress and Egress Using the Human Motion Simulation Framework Book
Author : Matthew P. Reed,Stephanie Huang
Publisher : Unknown
Release : 2008
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The ease of getting into and out of passenger cars and light trucks is a critical component of customer acceptance and product differentiation. In commercial vehicles, the health and safety of drivers is affected by the design of the steps and handholds they use to get into and out of the cab. Ingress/egress assessment appears to represent a substantial application opportunity for digital human models. The complexity of the design space and the range of possible biomechanical and subjective measures of interest mean that developing useful empirical models is difficult, requiring large-scale subject testing with physical mockups. Yet, ingress and egress motions are complex and strongly affected by the geometric constraints and driver attributes, posing substantial challenges in creating meaningful simulations using figure models. Previous approaches to simulating ingress and egress have focused on the modification of stored motions from laboratory studies to achieve complex motion simulations. This paper presents a new approach using the Human Motion Simulation Framework, an integrated, modular, hierarchical system designed to provide flexible control for simulating both common and novel movements in any human figure model.

Human Motion Modelling for Simulation Testing of GNSS Equipment

Human Motion Modelling for Simulation Testing of GNSS Equipment Book
Author : Kimon Voutsis
Publisher : Unknown
Release : 2017
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Human Motion Modelling for Simulation Testing of GNSS Equipment book written by Kimon Voutsis, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Contributions to Contact Simulation and Human Motion Analysis

Contributions to Contact Simulation and Human Motion Analysis Book
Author : Farnood Gholami
Publisher : Unknown
Release : 2016
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

"This thesis contains contributions to contact simulation and human motion analysis. Effects of the foot and ankle modelling techniques on the foot kinematics and dynamics are investigated. The analyses are carried out based on experimental data obtained using a motion capture system. The appropriateness of modelling the human ankle joint based on a stationary axis of rotation is investigated and a technique is also proposed which is capable of predicting the directional changes of the ankle axis during the foot flexion. Furthermore, two main modelling assumptions related to the number of the foot segments and the dimension of the foot model were the subject of the foot dynamics analyses. Effects of these modelling assumptions on the ankle joint torque and power are determined. A framework was developed which quantifies the gait abnormality of multiple sclerosis (MS) patients using a Kinect camera. The reliability of such a framework in assessing gait parameters in MS patients is evaluated based on captured data by Kinect. Also, a novel set of MS gait indices based on the concept of dynamic time warping is introduced whichcan characterize a patient's gait pattern and quantify the subject's gait deviation from the healthy population. In the second part of the thesis, two algorithms, namely, the accelerated-box and the generalized inverse-based algorithms, were developed for contact dynamics simulation. The accelerated-box algorithm improves the simulation of rigid body contact problems, in particular when the system under consideration has redundant constraints. The mathematical formulation is expressed in terms of a mixed linear complementarity problem (MLCP). The accelerated-box approach is partly motivated by the box friction model which is one of the existing approaches to solve contact problems. The original box friction model suffers from certain drawbacks in the presence of a large number of contact points such as long computational time, divergence problems, and instability. On the other hand, the accelerated-box approach developed in this thesis overcomes such drawbacks by taking advantage of the sparse structure of the lead matrix of the MLCP. This new method reduces the sensitivity of the solution to the constraint relaxation terms and decreases the number of required pivots to obtain the solution, and hence, shorter computational times result. This approach accordingly suggests a more reliable method for real-time simulation of multibody systems. A method based on the use of the Moore-Penrose generalized inverse was developed to deal with systems with redundant contacts. This approach omits the necessity of relaxing the constraints when redundancy exists in the system. To develop such a method, the generalized inverse is incorporated inside the pivoting steps of the MLCP solver. The method is very stable and robust, and its computational time is considerably smaller than the counterpartmethods, specially for highly redundant systems. Finally, a novel complementarity problem formulation is introduced. In this formulation, contacts are characterized based on constraints for normal direction while friction forces are simultaneously regularized and incorporated into the formulation. The dimension of such a formulation is significantly lower in comparison with counterpart formulations in the literature. Redundant constraints can be handled via relaxing the constraints. The proposed regularized formulation is examined for benchmark examples and results show acceptable agreement with the expected behaviours, while the computational time is considerably reduced in comparison with other formulations in the literature. This formulation could be a useful and practical choice for real-time simulation of complex mechanical systems." --

Mathematical Modeling and Simulation of Human Motion Using 3 dimensional Multi segment Coupled Pendulum System

Mathematical Modeling and Simulation of Human Motion Using 3 dimensional  Multi segment Coupled Pendulum System Book
Author : Loay Ahmed-Wasfe Al-Zube
Publisher : Unknown
Release : 2004
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The use of mathematical models to investigate the dynamics of human movement relies on two approaches: forward dynamics and inverse dynamics. In this investigation a new modeling approach called the Boundary Method is outlined. This method addresses some of the disadvantages of both the forward and the inverse approach. The method yields as output both a set of potential movement solutions to a given motor task and the net muscular impulses required to produce those movements. The input to the boundary method is a finite and adjustable number of critical target body configurations. In each phase of the motion that occurs between two contiguous target configurations the equations of motion are solved in the forward direction as a two point ballistic boundary value problem. In the limit as the number of specified target configurations increases the boundary method approaches a stable algorithm for doing inverse dynamics. A 3-Dimensional, multi-segment coupled pendulum system, that mathematically models human motion, will be presented along with a derivation of a generalized formula that constructs the equations of motion for this model. The suggested model is developed to utilize the boundary method. The model developed in this thesis will lead to a long rang goal, which is the development of a diagnostic tool for any motion analysis laboratory that will answer the question of finding optimal movement patterns, to prevent injury and improve performance in human subjects.

A Study of Optimization based Predictive Dynamics Method for Digital Human Modeling

A Study of Optimization based Predictive Dynamics Method for Digital Human Modeling Book
Author : Mahdiar Hariri
Publisher : Unknown
Release : 2012
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Here, kinematics of the motion is assumed to be known. It is shown that this approach leads to more realistic values for the contact forces and moments for a human motion task as opposed to the ZMP based approach. The proposed approach appears to be quite promising and needs to be fully integrated into the predictive dynamics approach of human motion simulation. Some other insights are obtained for the predictive dynamics approach of human motion simulation. For example, it is mathematically proved and also validated that there is a need for an individual constraint to ensure that the normal component of the resultant global forces remains compressive for non-adhesive contacts between the body and the environment. Also, the ZMP constraints and stability margins are applicable for the problems where all the contacts between the environment and the body are in one plane; however, the NCM constraints and stability margins are applicable for all types of arbitrary contacts between the body and the environment. The ZMP and NCM methods are used to model the motion of a human (soldier) performing several military tasks: Aiming, Kneeling, Going Prone and Aiming in Prone Position. New collision avoidance theorems are also presented and used in these simulations.

Computer simulation of human motion applied to two types of backstroke starts

Computer simulation of human motion applied to two types of backstroke starts Book
Author : Ingrid Monika Tichy
Publisher : Unknown
Release : 1981
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Computer simulation of human motion applied to two types of backstroke starts book written by Ingrid Monika Tichy, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Contact Modelling for Forward Dynamics of Human Motion

Contact Modelling for Forward Dynamics of Human Motion Book
Author : Peter Brown
Publisher : Unknown
Release : 2017
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Multibody forward dynamics models of the human body are often used in predictive simulations of human motion. An important component of these models is contact modelling. For example, foot-ground contact plays a crucial role in obtaining accurate results from a walking or running simulation and contact models of joints are necessary to determine accurate joint pressures. Contact models increase multibody system equation complexity (often dramatically) and can introduce nonlinearities and discontinuities into the system equations. This is particularly problematic in predictive simulations, which may determine optimal performance by running a model simulation thousands of times. A desirable contact model should be accurate enough to recreate physiological motion and contact pressures yet still efficient enough to use in an optimisation. A suitable contact model for multibody biomechanics is volumetric contact modelling. Volumetric contact modelling is ideally suited for large, conforming contacts, as is found in biomechanic applications, and has relatively simple, analytical equations (provided the contact surfaces can be approximated as simplified shapes). Another advantage is that volumetric contact can be used to calculate contact pressure, which is difficult to do with simpler point-contact models. In this thesis, volumetric contact was used in two biomechanics models to test its applicability: an anatomical knee model with tibiofemoral contact and a foot-ground contact model. The volumetric knee model was based on another knee model in the literature, with the contact model replaced with volumetric contact. The volumetric model ran faster than real-time and had similar contact forces to the original model. Further improvements are possible by using medical images to determine the contact geometry and including muscles in the model. A friction model is an important part of some biomechanic contact models, particularly the foot-ground contact model. A literature review revealed that many current friction models introduce discontinuities into system equations or are unnecessarily complex. A novel continuous friction model was developed which uses a minimum number of parameters for easy parametrisation. A novel, three-dimensional foot-ground contact model was developed and validated, for future use in a human gait simulation. The foot model used volumetric contact equations for ellipsoidal geometry (which were derived in this thesis, as an improvement on previous sphere-plane contact models). A gait experiment was used to parametrise and validate the model (except for the friction parameters). The model ran over 100 times faster than real-time (in an inverse simulation) and matched experimental normal force and centre of pressure location (with less than 7% root-mean-square error). It was discovered that the designed gait experiment could not be used to determine the friction parameters for the foot-ground model. A possible alternative was suggested, and the validation of the friction portion of the model was left to a future study. In conclusion, volumetric contact can be used to produce a computationally efficient and accurate contact model.

Development of Kinect superscript TR Applications for Assembly Simulation and Ergonomic Analysis

Development of Kinect superscript TR  Applications for Assembly Simulation and Ergonomic Analysis Book
Author : Chinmay Prakash Daphalapurkar
Publisher : Unknown
Release : 2012
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

"Marker-less motion capture technology has been harnessed for several years to track human movements for developing various applications. Recently, with the launch of Microsoft Kinect, researchers have been keenly interested in developing applications using this device. Since Kinect is very inexpensive (only $110 at the time of writing this thesis), it is a low-cost and a promising substitute for the comparatively expensive marker-based motion capture systems. Though it is principally designed for home entertainment, numerous applications can be developed with the capabilities of Kinect. The skeleton data of a human being tracked by a single Kinect device is enough to simulate the human movements, in some cases. However, it is highly desirable to develop a multiple Kinect system to enhance the tracking volume and to address an issue of occlusions. This thesis presents a novel approach for addressing the issue of interference of infrared light patterns while using multiple Kinect devices for human motion capture without lowering the frame rate. This research also presents a software solution to obtain skeleton data from multiple Kinect devices using Kinect for Windows SDK. It also discusses the development of an application involving auto scaling of a human model in digital human modeling software by Siemens Jack and human motion simulation using skeleton tracking data from Kinect to assist the industries with a flexible tool for ergonomic analysis. Further, the capability of this application for obtaining assembly simulations of fastening operations on an aircraft fuselage is also presented."--Abstract, leaf iii.

Real time Animation of Walking and Running Using Inverse Kinematics

Real time Animation of Walking and Running Using Inverse Kinematics Book
Author : Ying Ying She
Publisher : Unknown
Release : 2006
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Real time Animation of Walking and Running Using Inverse Kinematics book written by Ying Ying She, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Human Motion

Human Motion Book
Author : Bodo Rosenhahn,Reinhard Klette,Dimitris Metaxas
Publisher : Springer Science & Business Media
Release : 2008
ISBN : 1402066929
Language : En, Es, Fr & De

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Book Description :

The study of human motion dates back more than 2000 years. With the event of information technology, new areas have been added to this field. Research using computer vision and computer graphics contributes to a transformation of biomechanics into a discipline that now applies computing technology throughout; on the other hand, computer vision and computer graphics also benefit from defining goals aimed at solving problems in biomechanics. Besides interactions, all three areas also developed their own inherent research dynamics towards studying human motion. Researchers from all three of these areas have contributed to this book to promote the establishment of human motion research as a multi-facetted discipline and to improve the exchange of ideas and concepts between these three areas. Some chapters review the state of the art whilst others report on leading edge research results, with applications in medicine, sport science, cinematography and robotics.

Handbook of Digital Human Modeling

Handbook of Digital Human Modeling Book
Author : Vincent G. Duffy
Publisher : CRC Press
Release : 2016-04-19
ISBN : 1420063529
Language : En, Es, Fr & De

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Book Description :

The rapid introduction of sophisticated computers, services, telecommunications systems, and manufacturing systems has caused a major shift in the way people use and work with technology. It is not surprising that computer-aided modeling has emerged as a promising method for ensuring products meet the requirements of the consumer. The Handbook of Digital Human Modeling provides comprehensive coverage of the theory, tools, and methods to effectively achieve this objective. The 56 chapters in this book, written by 113 contributing authorities from Canada, China, France, Germany, the Netherlands, Poland, Sweden, Taiwan, UK, and the US, provide a wealth of international knowledge and guidelines. They cover applications in advanced manufacturing, aerospace, automotive, data visualization and simulation, defense and military systems, design for impaired mobility, healthcare and medicine, information systems, and product design. The text elucidates tools to help evaluate product and work design while reducing the need for physical prototyping. Additional software and demonstration materials on the CRC Press web site include a never-before-released 220-page step-by-step UGS-Siemens JackTM help manual developed at Purdue University. The current gap between capability to correctly predict outcomes and set expectation for new and existing products and processes affects human-system performance, market acceptance, product safety, and satisfaction at work. The handbook provides the fundamental concepts and tools for digital human modeling and simulation with a focus on its foundations in human factors and ergonomics. The tools identified and made available in this handbook help reduce the need for physical prototyping. They enable engineers to quantify acceptability and risk in design in terms of the human factors and ergonomics.

Scheidegger Urs 1943

Scheidegger Urs  1943     Book
Author : Anonim
Publisher : Unknown
Release : 1963
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Zeitungsausschnitte.

Novel Approaches in Human Musculo skeletal Modelling

Novel Approaches in Human Musculo skeletal Modelling Book
Author : Matthew Paul Benham
Publisher : Unknown
Release : 2001
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Novel Approaches in Human Musculo skeletal Modelling book written by Matthew Paul Benham, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.