A novel hybrid machine tool integrating a symmetrical redundantly actuated parallel mechanism: Design, kinematics, prototype and experiment

Fang, Hanliang; Tang, Tengfei; He, Zhen; Liu, Yuanchang; Zhang, Jun

doi:10.1016/j.mechmachtheory.2022.105013

Cited by 9 publications

(8 citation statements)

References 37 publications

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“…The pairs of isolators have been installed π/3 apart on a circle of radius R, as plotted in Figure 2(a). Based on the VPI's structure, the seat's VPI dynamic model is built in Under the influence of vibrations from the floors of vehicle or cab transmitted to the lower base of PVI at q 1À3 , the vertical forces of the seat's VPI (F 1À3 ) have been calculated by: 16,17…”

Section: Designing the Horizontal-parallel Isolatormentioning

confidence: 99%

“…Under the influence of vibrations from the floors of vehicle or cab transmitted to the lower base of PVI at q 1−3 , the vertical forces of the seat’s VPI ( F 1−3 ) have been calculated by: 16,17 where i = 1 then n = 1 and m = 0; i = 2, 3 then n = m = 0.5.…”

Section: Designing Three Seat Isolator Systemsmentioning

confidence: 99%

“…Another simple structure in the seat isolator designed by the verticalparallel isolator (VPI) using three isolated pairs was also studied and used on the off-road vehicle. [15][16][17][18] The damping values in the VPI were then controlled for ameliorating the comfort of the driver. 18 The study result also showed that the vertical vibration, pitch vibration, and roll vibration in the driver's seat were significantly improved compared to the traditional isolator of the seat, particularly the seat's pitching and rolling angles.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 2(b). Herein, the VPI's parameters and symbols have been listed in the same "Abbreviations".Under the influence of vibrations from the floors of vehicle or cab transmitted to the lower base of PVI at q 1À3 , the vertical forces of the seat's VPI (F 1À3 ) have been calculated by:16,17 …”

mentioning

confidence: 99%

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Designing and analyzing the efficiency of seat’s three vibration isolator modes in improving the driver’s comfort

Wang,

Nguyen,

Zhang

et al. 2024

Noise & Vibration Worldwide

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This study proposes three vibration isolator modes of the seat designed by horizontal-parallel isolator (HPI), vertical-parallel isolator (VPI), and negative-stiffness isolator (NSI) for improving the vehicle seat’s comfort. The influence of the dynamic parameters of three vibration isolator models is then analyzed based on their three dynamic models. Their dynamic parameters have been then optimised for comparing the isolation performance of HPI, VPI, and NSI based on root-mean-square (RMS) accelerations in the vertical, pitch, and roll directions of the driver’s seat. Research shows that driver comfort has been insignificantly affected by dimensions whereas driver comfort has been greatly affected by dynamic parameters of three vibration isolator modes. Based on the optimized parameters of HPI, VPI, and NSI, the vertical comfort of the driver with the NSI has been improved better than that of both the HPI and VPI, conversely, the pitch comfort and roll comfort of the driver with the VPI has been improved better than that of both the HPI and NSI. In order to improve the comfort of the driver in three directions, the VPI should be combined with the NSI to design the seat isolator of vehicles.

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Section: Designing the Horizontal-parallel Isolatormentioning

confidence: 99%

Section: Designing Three Seat Isolator Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Designing and analyzing the efficiency of seat’s three vibration isolator modes in improving the driver’s comfort

Wang,

Nguyen,

Zhang

et al. 2024

Noise & Vibration Worldwide

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show abstract

“…Liu [5] designed a 5-DOF 6PUS-UPU over-constrained RAPM and analyzed the dynamics deformation compatibility of the RAPM. To increase the load-carrying capacity, and avoid singularity points, Fang [6] proposed 2PRU-(2PRU)R RAPMs based on type synthesis methodology. Yan [7] put forward 4PUS-PPPU redundantly actuated parallel mechanism five-face machining.…”

Section: Introductionmentioning

confidence: 99%

Type synthesis and trajectory planning of 5-DOF redundantly actuated parallel robots with large output rotational angles for large workpieces

Jiang,

Huang,

Zhu

et al. 2023

Robotica

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Aerospace represents the development of national science and technology. It is an important foundation for exploring space and an important guarantee for the construction of aerospace power. There are many large workpieces in the aerospace field. The box insulation layer of large workpieces is an important processing problem. A new thick processing equipment is proposed to process the box insulation layer of large workpieces. The thick processing equipment consists of the XYZ shaft long guide rail and five degrees of freedom (5-DOF) RAPA. The mechanical structure of the 5-DOF RAPA is a redundantly actuated parallel mechanism (RAPM). Meanwhile, this paper proposes a new method to design 5-DOF redundantly actuated parallel mechanisms (RAPMs) with large output rotational angles. Based on configuration evolution and Li group, two articulated moving platforms (AMPs) and four kinds of limbs are designed, and a series of 3T2R (T represents translation, R represents rotation) RAPMs and 2T3R RAPMs are synthesized. To verify the designed RAPMs with large angle, an example of RAPMs, 4UPS-{2UPR}-R is analyzed. To ensure that the RAPM has no mechanism vibration impact in movement, this paper represents the RAPM adopts a newly proposed trajectory planning method. The results show that the 4SPU-(2UPR)R mechanism possesses large angles and verifies the efficiency of the new proposed trajectory planning method in simplified trajectories. This work lays the foundation for processing the box insulation layer of large workpieces with straight lines and arcs paths.

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A Compact Spatial Pose Adjustment Mechanism Driving by Stick-Slip

Li,

Zhang

et al. 2023

Mechanisms and Machine Science

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A novel hybrid machine tool integrating a symmetrical redundantly actuated parallel mechanism: Design, kinematics, prototype and experiment

Cited by 9 publications

References 37 publications

Designing and analyzing the efficiency of seat’s three vibration isolator modes in improving the driver’s comfort

Designing and analyzing the efficiency of seat’s three vibration isolator modes in improving the driver’s comfort

Type synthesis and trajectory planning of 5-DOF redundantly actuated parallel robots with large output rotational angles for large workpieces

A Compact Spatial Pose Adjustment Mechanism Driving by Stick-Slip

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