State Estimation For An Agonistic‐Antagonistic Muscle System

Thang Tien Nguyen; Holly Warner; Hung La; Hanieh Mohammadi; Dan Simon; Hanz Richter

doi:10.1002/asjc.1916

State Estimation For An Agonistic‐Antagonistic Muscle System

Asian Journal of Control ◽

10.1002/asjc.1916 ◽

2018 ◽

Vol 21 (1) ◽

pp. 354-363 ◽

Cited By ~ 1

Author(s):

Thang Tien Nguyen ◽

Holly Warner ◽

Hung La ◽

Hanieh Mohammadi ◽

Dan Simon ◽

...

Keyword(s):

State Estimation ◽

Muscle System ◽

Antagonistic Muscle

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On the State Estimation of an Agonistic-Antagonistic Muscle System

Volume 1: Aerospace Applications; Advances in Control Design Methods; Bio Engineering Applications; Advances in Non-Linear Control; Adaptive and Intelligent Systems Control; Advances in Wind Energy Systems; Advances in Robotics; Assistive and Rehabilitation Robotics; Biomedical and Neural Systems Modeling, Diagnostics, and Control; Bio-Mechatronics and Physical Human Robot; Advanced Driver Assistance Systems and Autonomous Vehicles; Automotive Systems ◽

10.1115/dscc2017-5304 ◽

2017 ◽

Cited By ~ 1

Author(s):

Thang Nguyen ◽

Holly Warner ◽

Hanieh Mohammadi ◽

Dan Simon ◽

Hanz Richter

Keyword(s):

State Estimation ◽

Control Method ◽

The State ◽

Reference Trajectory ◽

State Variables ◽

Muscle System ◽

Spring Force ◽

Antagonistic Muscle ◽

Estimation Scheme ◽

The Hill

In this paper, an agonistic-antagonistic muscle system is presented. This dual muscle system is based on the Hill muscle model. The problem of estimating the state variables and activation signals of the dual muscle system is addressed. A proposed estimation scheme which combines a super-twisting observer and an input estimator is given to provide a solution to the problem. A backstepping control method is used to track a reference trajectory. Numerical results are conducted to show that the relative error for state estimation is about 1% and that for the unknown inputs is about 3% when the measurements of the length of a muscle and its nonlinear spring force are affected by noise profiles whose normalized amplitude is 0.005.

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The Fluid Dynamics of the Bivalve Molluscs, Mya and Margaritifera

Journal of Experimental Biology ◽

10.1242/jeb.45.2.369 ◽

1966 ◽

Vol 45 (2) ◽

pp. 369-382

Author(s):

E. R. TRUEMAN

Keyword(s):

Fluid Dynamics ◽

High Pressures ◽

Mantle Cavity ◽

The Body ◽

Mya Arenaria ◽

Bivalve Molluscs ◽

Muscle System ◽

Close Interaction ◽

Antagonistic Muscle ◽

Pressure Changes

1. A comparison is made of the fluid dynamics of a shallow, yet actively, burrowing bivalve, Margaritifera, with the sessile, deeply buried Mya arenaria. 2. In both adduction produces high pressures (up to ioo cm.) in the mantle and the pericardial cavities which are utilized in Margaritifera for locomotory purposes, in Mya principally for siphonal extension. 3. With siphonal and pedal apertures closed the mantle cavity of Mya is virtually watertight and acts, together with the blood, as the fluid of an antagonistic muscle system, whereby adduction causes siphonal extension and siphonal retraction produces an increase in gape of the valves. The close interaction between these two muscle systems is illustrated by pressure recordings of Mya in the normal buried position. 4. Siphonal movements are shown to be associated with divarication of the valves and accompanying pressure changes. 5. Consideration is given to the haemodynamics of Mya and by contrast with the high pressures involved in locomotion or siphonal movement, maximum pressures of only 2.5 cm. were recorded from the heart, producing a sluggish circulation. The higher pressures derived from the body musculature make an important contribution to movements of the blood.

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