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A friction electro-hydraulic load simulator (FEHLS) has little disturbances of actuator by friction loading. To prove the loading performance of the FEHLS, this paper compares the motion disturbance characteristics between traditional electro-hydraulic load simulator (TEHLS) and FEHLS. Their mathematical models and principle block diagrams are constructed according to their structures. Their motion...
As an electro-hydraulic load simulator (EHLS) is a typical passive force or torque control system, strong motion disturbance has been the key problem. This paper constructs mathematical model of EHLS system and analyzes theoretically the root cause of extraneous torque. A compound control strategy is proposed to improve the loading performance of EHLS. The motion compensation controller based on the...
In this paper, we present a ranging experiment performed in a typical indoor environment with a digital ultra wideband (UWB) system. At first, the structures of UWB transceivers are introduced, based on which the time of arrival (TOA) estimation algorithm based on energy detection is proposed consequently. Then the experiment background including the environment and measure method is illustrated....
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