Accuracy analysis of spatial overconstrained extendible support structures considering geometric errors, joint clearances and link flexibility

Yu, Dewen; Zhao, Qiangqiang; Guo, Junkang; Chen, Feifei; Hong, Jun

doi:10.1016/j.ast.2021.107098

Cited by 19 publications

(3 citation statements)

References 57 publications

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“…Li et al [9] use the Lankarana-Nikravesh contact force model and improved Coulomb friction model to analyze action and interaction of clearance joints, displaying motion property of journal in initial state, deployment phase and post-lock phase, providing foundations for effect analysis of overall dynamics character. Yu et al [10] develop a contact detection algorithm for rotating shaft and sleeve based on a comprehensive kinematic model of rotating joint with clearance, combined with contact conditions and structural constraints, and predict the posture error of the extensible support structure under joint clearance. Chen et al [11] aim at a planar multi-body mechanical system with multi-joint clearance, studying the clearance joint number, location and clearance size on its dynamic response.…”

Section: Introductionmentioning

confidence: 99%

Mobility Analysis of Space Deployable Truss Considering Joint Clearance and Friction

Wang,

Liu,

Cai

et al. 2024

Preprint

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Truss is an important component in the spacecraft system, its smooth deployment is significant to ensure the normal operation of the spacecraft. The parts in truss are connected by joints and clearance inevitably exists in joints. As the scale of truss structure expands, the number of joints in truss increases, resulting clearance having significant effect on the mobility of the truss, then influencing the operation of spacecraft. Firstly, in this paper, the multi-rigid-body Cartesian method is adopted to establish the deployment dynamics model of truss system with ideal joint. Then we establish contact dynamics model for clearance joint, obtaining normal contact force and tangential friction force by applying Hertz contact theory and Coulomb friction model, respectively. Finally, the effects of clearance, driving force and friction force on the mobility of truss system are analyzed by numerical simulations. The simulation results show that, the reduction of joint clearance and driving force, and the increase of joint friction both decrease the mobility of truss system.

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Section: Introductionmentioning

confidence: 99%

Mobility Analysis of Space Deployable Truss Considering Joint Clearance and Friction

Wang,

Liu,

Cai

et al. 2024

Preprint

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“…In order to realize the cumulative analysis of deviations in the assembly process, Whitney et al introduced the homogeneous coordinate transformation in robot kinematics to characterize the relative position offset caused by geometric deviation caused by machining deviation [4][5]. Based on SDT method and the homogeneous coordinate transformation theory [6][7][8], many scholars have proposed a series of improved prediction models and methods for the assembly accuracy of mechanical systems [9][10][11][12][13]. These modeling and analysis methods provide a rich theoretical basis for the prediction of system assembly accuracy and the comprehensive analysis of tolerance.…”

Section: Introductionmentioning

confidence: 99%

A novel collaborative optimization assembly process method for multi-performance of aeroengine rotors

Wen

Zhao

et al. 2023

Int J Adv Manuf Technol

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In the assembly process of aeroengine, the aeroengines have been rejected at pass off test for high vibration of high pressure rotor under the condition of meeting the geometric accuracy. Repeated disassembly and trial assembly will lead to interface damage, which will affect the safety and reliability of the engine. Therefore, a multi-objective collaborative optimization process method for geometric accuracy and dynamic performance is put forward based on the practical engineering problems. In the proposed method, the primal problem is firstly reveals the transfer mechanism of coaxiality and unbalance of rotor system, and the prediction model of the coaxiality and unbalance of the rotor system was established. Then, combined with the high-precision reduced order model of aeroengine high-pressure combined rotor, the system vibration responses under different assembly states are obtained. Finally, a multi-objective collaborative optimization assembly process method considering coaxiality, unbalance and vibration response is obtained. The results show that the collaborative optimization process method considering assembly accuracy and dynamic performance is the optimal assembly strategy, which can reduce the vibration amplitude of the key nodes of the rotor system while ensuring high assembly accuracy, and achieve the low-level vibration of the rotor system.

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“…It will also lead to the deterioration of dynamics performance or adverse vibrations and will mean that the dynamics behavior of the actual mechanism with clearance will deviate from the dynamics behavior of an ideal mechanism. The degree of freedom brought by a clearance joint is a significant source of error [1][2][3][4][5][6][7][8][9][10][11]. Aiming at the problems of low stability and intensified wear during the operation of a mechanism containing clearances, according to its kinematic and dynamics characteristics, we addressed this problem through the dynamics optimization of a mechanism with a clearance.…”

Section: Introductionmentioning

confidence: 99%

Dynamics Optimization Research and Dynamics Accuracy and Reliability Analysis of a Multi-Link Mechanism with Clearances

et al. 2022

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With the development of high-speed and lightweight mechanisms, and the continuous improvement of manufacturing accuracy requirements in industrial production, clearance joints have increasingly become one of the key factors affecting dynamics performance. Poor clearance will seriously compromise stability, accuracy, and dynamics performance. Based on a genetic algorithm, an efficient modeling methodology for the dynamics optimization of a planar complex multi-link mechanism containing multiple clearance joints is put forward. The model comprises a 2-degree of freedom (DOF) nine-bar mechanism that can be used as the main transmission mechanism of a hybrid drive multi-link press, which is taken as the research object. The optimization objective is to minimize the maximum acceleration of the slider and minimize the difference between the actual central trajectory and the ideal trajectory. By optimizing the quality parameters of key components, an optimal solution for the design parameters is obtained, and the effects of the different optimizations of the objective functions on dynamics response are compared and analyzed. At the same time, a new modeling and calculation methodology of the dynamics accuracy and reliability of a complex multi-link mechanism in terms of multiple clearances is proposed, and the effect of optimization on dynamics accuracy and the reliability of the mechanism is analyzed. Based on the optimization results obtained by taking the minimum difference between the actual center trajectory and the ideal trajectory as an optimization objective, the nonlinear characteristics before and after optimization are analyzed through a phase diagram and Poincaré map. A test platform was built to study the dynamics of the mechanism with clearances. Research not only provides a basis for the dynamics optimization of a multi-link mechanism containing clearances but also provides reference significance for the reliability analysis of a multi-link mechanism containing clearances.

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Accuracy analysis of spatial overconstrained extendible support structures considering geometric errors, joint clearances and link flexibility

Cited by 19 publications

References 57 publications

Mobility Analysis of Space Deployable Truss Considering Joint Clearance and Friction

Mobility Analysis of Space Deployable Truss Considering Joint Clearance and Friction

A novel collaborative optimization assembly process method for multi-performance of aeroengine rotors

Dynamics Optimization Research and Dynamics Accuracy and Reliability Analysis of a Multi-Link Mechanism with Clearances

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