Katsuya Kanaoka

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— This paper proposes power assist controllers that realize control input minimization using resonance of passive elements. To satisfy the objective, two types of systems are considered and controllers are proposed for each system. These controllers require no biosignals and satisfy causal manner. Convergence of the controllers is discussed theoretically.(More)
— In this paper, we propose a power assist system that amplifies sinusoidal human's torque and attains minimization of control input requirement using an impedance control and resonance. This impedance control is designed to realize the following features: 1) Sinusoidal torque amplification. 2) Minimization of control input requirement by adjusting(More)
— This paper proposes a tracking control method of sinusoidal motions utilizing stiffness adjustment of mechanical elastic elements for serial link systems. Although dynamics of the controlled objects is nonlinear, the stiffness adjustment realize a condition similar to a resonance of linear systems. We present a controller that adjusts stiffness of the(More)
— In the case of control for nonlinear mechanical systems, which have complex actuator dynamics, the total system becomes high-order and nonlinear. Generally speaking, it is not easy to tune feedback gains for state feedback. In this paper, we propose a feedback control scheme for motion control of nonlinear high-order systems. We prove that the proposed(More)
In this paper, we propose a passivity monitor which evaluates stability of a system based on the concept of passivity, and a software limiter which turns the system stable if it is originally unstable. It is shown that asymptotic stability will be guaranteed for arbitrary robots with arbitrary control schemes and environments , even if their properties are(More)
— In this paper, a Virtual Power Limiter System is proposed. This requires no modeling and makes it possible to guarantee the stability of control systems which include unknown characteristics: flexibility in flexible manipulators, compressibility in pneumatic servo systems, human dynamics in man-machine systems, hardware nonlinearity in mecha-tronic(More)
— We have proposed the concept of Man-Machine Synergy Effectors. These are high-performance tools for human use, which are realized by introducing robot technology. It becomes possible to perform conventionally impossible tasks by human alone or robot alone, because the system synergizes better assets of both parties. In this paper, the concept of(More)
— The force-projecting master-slave (MS) control scheme is the reversed implementation of the conventional force-reflecting scheme. This paper presents a method to stabilize force projecting MS systems using a linear phase-lead compensator and a new nonlinear filter. The nonlinear filter is a modified version of Jin et al.'s parabolic sliding mode filter,(More)
—Estimation of joint torque is an important objective in the analyses of human motion. In particular, many applications seek to discern torque during a desired human motion, which is equivalent to solving the inverse dynamics. The computed torque method is a conventional means of calculating inverse dynamics. The obtained torque, however, invariably(More)