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This paper proposes a method to verify the performance of a redundant 4 degree of freedoms (DOF) hydraulic manipulator when Virtual Spring-damper (VSD) algorithm is applied. It is combined with a control based on the VSD algorithm proposed by Ari-moto et al. To verify the applicability of VSD algorithm to the hydraulic robot manipulator of redundancy 4-DOF,(More)
The Quadruped walking robot “JINPOONG” is developed to be able to walk in the field which is use to detection, surveillance, reconnaissance, security, and assistance. It can move, carry the luggage of 60kg or more and walk at the uneven terrain such as gravel road and slope of 15 degrees or more. By adjusting the length of the leg caused by(More)
This paper presents a simple method to control the motion of a quadruped robot in unknown rough terrains using a full dynamic model. First, using typical stiffness control method, the four legs' behavior is approximated to 3D spring damper systems. By this way, we can easily derive the dynamic equations of motion in Cartesian space. Based on these(More)
JINPOONG is a platform that has been developed in order to move an uneven terrain as quadrupeds. Each leg was designed to have 4 degrees of freedom to utilize a broad workspace. A solution of inverse kinematics of this system was found out using the closed form solution, considering motion control of JINPOONG. Therefore, this paper explains the calculation(More)
JINPOONG, a walking robot using hydraulic pressure, requires a power source to operate the power-pack. Therefore, power was supplied to JINPOONG by using an engine that has high power per unit engine weight. Hydraulic pump requires a constant rotating speed in order to supply stable hydraulic pressure because the pressure and flow rate changes according to(More)
The Spring Loaded Inverted Pendulum (SLIP) describes the dynamic walking of humans and animals in a simplified manner. However, realizing such movements by means of a combination of typical articulated legs and linear actuators has some limitations. This paper proposes a leg mechanism that accurately reflects the SLIP based on its mechanical constitution.(More)