A procedure for estimating the relevant forces in the human knee using a four-bar mechanism | Semantic Scholar (2024)

The Freudenstein's equation was determined and from that equation it was possible to obtain the real value of the bond angle and realvalue of the output angle and the mathematical model obtained can be used in PIMI 1504 Project.

The main contribution of this paper is to show the influence of double support phases for cyclic stable walking gaits with this novel bipedal robot.

A force calculation process based on Lagrange multipliers that provides a closed-form solution to the problem of dynamic indeterminacy is solved without the need to use an iterative process and can be integrated into real time control systems.

The designed mechanism executes nominal performance in four parameters and offers enhanced toe-clearance during mid-swing, a significant improvement over the existing designs for amputees to navigate comfortably on irregular terrain in developing countries.

A new technique based on the use of a 3PRS parallel robot for applying a predefined dynamical load is proposed, where force patterns can be reproduced in a similar way as the used during actual experimental measures.

The theoretical results suggest that, with relatively simple measurements, the model was able to reproduce major features of the natural knee joint and provide necessary information for further mechanical analysis.

A two-dimensional model of the tibio-femoral joint was constructed by using the results of cadaver knee dissections together with radiographic landmarks on healthy knees loaded at various angles of flexion, indicating that high forces may arise in the anterior cruciate ligament in the straight knee.

A model is developed of the human lower extremity to study how changes in musculoskeletal geometry and musculotendon parameters affect muscle force and its moment about the joints and the joint moments calculated with the model compare well with experimentally measured isometric joint moments.

The procedures described in this paper were successful in creating valid simulations of normal movement, and in simulating injuries that are caused by perturbed neuromuscular control.

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