Abstract
Several mechanisms have been proposed to solve shock response control problems in vehicle engineering. The momentum exchange impact damper (MEID) mechanism has been considered for solving shock response control problems in spacecraft landing systems. The effectiveness of MEIDs against the shock responses of a running cart collision problem was investigated using simulation. A novel hybrid MEID mechanism is proposed by considering the time-difference operation of both passive and active MEIDs to optimize the actuator parameters. In this time-difference hybrid MEID (TDHMEID), the amount of passive momentum exchange can be easily identified. Therefore, TDHMEID can be used to set the optimal parameters for active actuator operation. The effectiveness of the TDHMEID mechanism on controlling the shock response and saving actuator energy is verified by simulation.
Highlights
When mechanical structures receive a large impact such as an automobile crash, it leads to undesirable results
Gan et al applied an momentum exchange impact damper (MEID) to solve a horizontal shock response control problem [4]; hardware restrictions reduced the performance of the system
The hybrid MEID (HMEID) is the ideal mechanism in this case because the momentum exchange rate can be controlled by setting the passive MEID (PMEID) and AMEID parameters
Summary
When mechanical structures receive a large impact such as an automobile crash, it leads to undesirable results. The momentum exchange impact damper (MEID) mechanism based on the Newton’s cradle principle (Figure 1) has been proposed to solve shock response control problems in spacecraft landing systems [2]. Conventional HMEIDs simultaneously operate the mechanism of the active and passive MEIDs to further suppress the consumed energy of the AMEID and to exchange sufficient momentum. The HMEID is the ideal mechanism in this case because the momentum exchange rate can be controlled by setting the PMEID and AMEID parameters. We propose a novel HMEID mechanism that includes the time-difference operation of both active and passive MEIDs to optimize the actuator operation parameters. The time-difference hybrid MEID (TDHMEID) mechanism can control the momentum exchange rate more effectively than the conventional HMEID mechanism. This study considers the cart crash problem in the fundamental investigation, and the effectiveness of the proposed TDHMEID is verified by simulation
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