In this paper, we have reported results of the experimental tests for validating and characterizing a new design and its operation for a humanoid robot arm with one actuator only. The core of the arm system consists of clutches that are activated or deactivated according to a programmed manipulation path-planning. Experimental tests are discussed with measured results to characterize the functi...

In this paper we extend previous control design applied to an electropneumatic clutch actuator. A dual-mode switched nonlinear controller design and an adaptive nonlinear observer design are combined to achieve position control of the clutch actuator with only position measurements available. The observer provides estimates of position, velocity, chamber pressures, friction state and parameters...

Tolerance design is a vital factor which influences product and process development. Further, it determines the manufacturing cost, the functionality and quality of a product. It is evident that optimal tolerance normally leads to produce ample parts, better operation of mechanical systems and excellent assembling. In contrast, tight tolerance leads to increase in manufacturing cost for an asse...

This paper proposes a novel hybrid power system to improve the shift quality of electric vehicle (HEV). After selecting typical scheme, study focused on motor rotary velocity control algorithm and coordinated strategy for clutch. The effects various algorithms different target velocities were analyzed, proportional-integral-derivative (PID)–bang-bang–fuzzy compound intelligent was investigated....

Abstract. Clutch judder is a friction-induced self-excited vibration occurring in automotive drivelines, an NVH issue studied for more than forty years and attributed by the scientific community to three possible causes: stick-slip, negative gradient of coefficient friction geometric disturbances. However, these explanations fail describe kind this contribution, arising presence oscillating com...

In this paper, a complete model of an electro hydraulic driven dry clutch along with its performance evaluation has elucidated. Through precision modeling, a complete nonlinear physical and full order sketch of clutch has drawn. Ultimate nonlinearities existent in the system prohibits it from being controlled by conventional linear control algorithms and to compensate the behavior of the sy...

Theories on the evolution of clutch size are primarily influenced by examples from terrestrial animals, yet most animal phyla occur exclusively in water. Oxygen has a lower diffusion coefficient and lower solubility in water than in air, and siblings in aquatic clutches often compete for oxygen. Mitigating this competition could affect allocation of resources to offspring. Gelatinous clutches a...

How much effort to expend in any one bout of reproduction is among the most important decisions made by an individual that breeds more than once. According to life-history theory, reproduction is costly, and individuals that invest too much in a given reproductive bout pay with reduced reproductive output in the future. Likewise, investing too little does not maximize reproductive potential. Be...