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Research objective is motion control of a humanoid robot limb with considerations of characteristics of biological subjects. There are some differences between biological subjects and conventional humanoid robots from the point of its mechanisms and control method. From the point of mechanism, biological subjects have two joints simultaneous drive, which is called bi-articular simultaneous drive....
Generally, friction/disturbance compensation is an important issue in high-precision motion control applications. In particular, when the system under control undergoes low-speed or reversal motions, the friction force and external disturbances will degrade motion accuracy. Therefore, to achieve satisfactory motion performance, it is necessary to simultaneously compensate for the friction force and...
This paper proposes a new smooth touch control for operating industrial robots in unknown environments. The touch control is an useful strategy for the smooth switching from the position control to the force control. Many applications require flexibility to the environments. For example, direct teaching by using a manual control is one of the typical applications. A highperformance force control method...
Multiphase electric drives have been recently proposed for applications where the highest overall system reliability, combined with a reduction in the total power per phase, are required. Strategies like Field Oriented Control (FOC) and Direct Torque Control (DTC) have been traditionally used in these high performance applications. In this paper, a Predictive Torque Control (PTC) method is introduced...
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