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We developed a violin playing robot that consists of a bow mechanism and a string shifting mechanism and operates by sound feedback control. The bow mechanism was developed as a 2-degree-of-freedom moving mechanism that can independently adjust bow speed and bow pressure. The string shifting mechanism was also developed as a rigid mechanism that can withstand the high speed motion of the bowing mechanism...
In this paper, we report the first rapid control prototyping (RCP) system with a sub-nanosecond (ns) high-resolution Pulse Width Modulation (PWM) for server power supply circuits. Conventional RCP systems are designed mainly for engine and motor control. Based on the relevant response time and control accuracy requirements, their PWM update periods and resolutions are over 100 microseconds (µs) and...
A cooling control method based on a model predictive control (MPC) for a modular datacenter utilizing the fresh-air is proposed. The proposed method reduces the total energy consumption of information technology (IT) equipment and cooling facilities in the data center, while considering a relationship between energy-savings and the temperature information of IT equipment. This method based on MPC...
Tow phase double-ended forward converter is suitable for more than 2kW high efficiency power supply by the feature of low surge voltage. One issue of the converter is dead-time loss of synchronous rectifier FETs. In this paper, we propose a precise digital dead-time control method for a 2.5 kW (12 V / 208 A) output power supply. Proposed method is confirmed by experiment and theoretical analysis that...
It is difficult to obtain ideal target tracking when using conventional PID to control Exhaust Gas Recirculation (EGR) and Variable Nozzle Turbocharger (VNT) in diesel engines. One apparent cause is non-linearity due to saturation of EGR and VNT. In this paper, we apply Model Predictive Control (MPC) to overcome this problem by treating the saturation as a constraint condition. In addition, we construct...
The present invention relates to a simulation or control method and apparatus for a manipulator apparatus and makes it possible to calculate three-dimensional dynamics of the entire manipulator apparatus on the real time basis using the laws of conservation of momentum/angular momentum of the entire system, reverse dynamics or normal dynamics of a wheel system to display motion of the manipulator...
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