The steering kinematics and dynamics of articulated loadersare analyzed in theory and simulated with MATLAB in this paper Both the relationship ofthe displacement of steering pistons and steering angle and the relationship ofthe steering arm of force and steering angle are derived The regulation and the main influencing factors of the moment of insitusteering resistance are analyzed And it is proved by the experiment on ZL40A loader that all the results of theoretic analysis and simulation are correct
For changing law of force arm and moment in research process about plate bend, with the help of mathematical operation experiment research, the mathematical model on "U shape" parts for plate bend and the kinematics figure has been set up.
A group of warp runs in one size box,the generating of length difference in each warp beam should check the warp unwinding mechanism such as air cylinder and checking force arm and strengthen the control of warp quality.
The results turn out that the larger the horizontal tail volume coefficient, the higher pitch agility will be, and at the same horizontal tail volume coefficient the larger the horizontal tail area , the higher pitch agility will be, compared with the larger of the horizontal tail moment arm.
The method is based on that elements on major diagonal of transfer matrix are used as equilibrium lever fulcrum to calculate equivalent lever arm coefficients in the same column in order to uncouple equations and reduce orders of matrix and characteristic determinant, and as a result, simplify calculation work.
Approach 2: the empirical expression of the flexural lever arm of the section, which was obtained by the statistics and regression of the experimental data, was adopted as the computational formula of the internal arm of forces in equilibrium conditions of the sections.
These moment arms often depended on the joint position in the axis of the moment arm and, to a lesser degree, on the extension/ flexion angle as well.
The effect of IP flexion is linked to rotation of the force direction where joint torque switches from extension to flexion, while the effect of MCP extension is more likely related to changes in muscle length and MCP moment arm.
However, the directional preference (orientation) of three of the four neck muscles did not correspond to the muscle's moment arm, indicating that maximizing a muscle's mechanical advantage is not the only factor in determining muscle activation.
Alignment of joints with respect to the leg axis reduces the moment arm of external forces and therefore joint torques.
Length and moment arm of human leg muscles as a function of knee and hip-joint angles
The required simulation parameters, like moment of inertia, stiffness of the components and lever arm length.
The relatively great torque during the double-stance phase is caused mainly by the medially directed, short-term impact peak at heel strike, with the stride length as lever arm.
If the loss of quadriceps function was more than 40%, a proportional loss of flexion torque was seen, indicating a functional impairment of the knee joint muscles not solely attributable to the loss of the lever arm.
Thus, the data suggest that the quadriceps lever arm was improved, which might have positive effect in mobilization of patients after TKA.
The BFm had equal lever arm lengths to the hip and knee joints, appears to function as a hip extensor, and may contribute to knee flexion or femoral rotation.