Research on a lightweight unmanned sightseeing vehicle frame based on multi-condition and multi-objective optimization

Tang, Pei; Yang, Ruiqi; Xiao-hua, NI; Zhao, Haojie; Xu, Fei

doi:10.1177/16878132221131748

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Compared with the pre-optimization, the weight of the optimized structure was reduced by 86.5 kg, the weight reduction rate was up to 10%, and the bending stiffness was significantly improved. Tang et al 15 proposed a lightweight optimization method based on multiple working conditions and objectives, and completed the optimization design of the frame of a crewless sightseeing vehicle. The results show that the optimized structure can reduce the weight by 5.4% while satisfying the strength requirements of various working conditions.…”

Section: Introductionmentioning

confidence: 99%

Lightweight design of temporary support device of rectangular shield for the robot system of coal mine roadway excavation

Wang

et al. 2023

Advances in Mechanical Engineering

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Owing to the existing problems of the temporary shield support device in a coal mine, such as considerable component weight, difficult disassembly, and large chamber installation, the design of the temporary rectangular shield support device was optimized. A module division method combining the functional analysis method and a similar feature clustering method was proposed, which completes the division of the functional module and establishes the structural module. A structural optimization method of “variable density topology optimization, parameter sensitivity analysis and Optimal Space-Filling Design (OSF)” was proposed. A variable-density topology optimization model of the device was established using the variable-density topology optimization method. The key variables of the device were determined using a parameter sensitivity analysis. The sample points of the critical variables were generated using the optimal space-filling design method, the approximate response surface models of mass, displacement, and stress were constructed, and the optimal solution of the device’s weight was obtained under the constraint conditions of pressure and displacement. A lightweight matching method of modularization based on transportability, disassembly, maintainability, and reliability was proposed, and the optimal matching scheme for the volume and mass of the device was determined. As a result, the weight of the temporary shield support device was reduced by 11.2%, and the maximum stress was reduced by 13.4%, under the premise of ensuring reliability. It realizes the convenience of transportation and high efficiency of assembly and disassembly in different design requirements, which is of great significance to accelerate the intelligent construction of coal mine.

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Section: Introductionmentioning

confidence: 99%

Lightweight design of temporary support device of rectangular shield for the robot system of coal mine roadway excavation

Wang

et al. 2023

Advances in Mechanical Engineering

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“…As intelligent driving vehicles emerge, they showcase vast potential across various domains. However, given the intricate and unpredictable nature of road traffic conditions, ensuring safe obstacle avoidance in complex settings [3,4] stands as a pivotal challenge in this area of research.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Path Planning for Obstacle Avoidance in Intelligent Driving Sightseeing Cars Using Spatial Perception

Yang,

Wu,

et al. 2023

Applied Sciences

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The increasing prevalence of intelligent driving sightseeing vehicles in the tourism industry underscores the critical importance of real-time planning for effective local obstacle avoidance paths when these vehicles encounter obstacles during operation. To fulfill this requirement, it is imperative to establish real-time dynamic perception as the foundational element. Thus, this paper introduces a novel local path planning algorithm founded on the principles of spatial perception. In the diverse array of road environments characterized by varying spatial features, sightseeing vehicles can effectively achieve safe and comfortable obstacle avoidance maneuvers. The proposed approach employs a high-precision positioning module and a real-time dynamic perception module to acquire real-time spatial information pertaining to the sightseeing vehicle and the road environment. It comprehensively integrates spatiotemporal safety constraints and obstacle avoidance curvature constraints to derive control points for the obstacle avoidance path. Specific control points undergo optimization and adjustment, ultimately resulting in the generation of the obstacle avoidance spatiotemporal path through discrete interpolation using B-spline curves. These locally tailored paths are subsequently compared with local obstacle avoidance paths generated using Bezier curves. The empirical validation of the proposed local obstacle avoidance path algorithm is conducted through a combination of simulation analysis and real vehicle verification. The research outcomes affirm that the algorithm can indeed produce smoother local obstacle avoidance paths, resulting in reduced front-wheel steering angles and yaw angle variations. This enhancement substantially contributes to the overall stability of sightseeing vehicles during obstacle avoidance maneuvers.

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“…The research results showed that the optimized frame can meet the requirements, the modal frequency also avoided the vibration frequency caused by the excitation of the engine, and achieved the optimization goal. To achieve the lightweight design of the frame, many scholars have conducted optimization designs based on different methods [15,16]. He Rui [17] established a frame model for performance analysis and lightweight problem of a certain truck frame, conducted a bending stiffness analysis and bending stiffness tests on it, and conducted a multidisciplinary and multi-objective optimization design on the thickness values of the main components based on the integrated platform.…”

mentioning

confidence: 99%

Analysis of Static and Dynamic Characteristics and Lightweight Design of Titanium Alloy Frame

Zheng

2024

Manufacturing Technology

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In the field of modern automobile manufacturing, the frame, as the core load-bearing component of automobiles, has always been a hot research topic in terms of strength, stiffness, and lightweight design. In response to the shortcomings of traditional car frames in strength and stiffness, as well as the problem of weight redundancy, this research focuses on titanium alloy frames and conducts in-depth analysis of static and dynamic characteristics and lightweight design. Firstly, this article used the finite element analysis method to simulate four representative working conditions and performed a static analysis on the titanium alloy frame. Through analysis, the stress distribution and deformation of the frame under different load conditions were obtained, providing an important basis for the subsequent optimization design. Second, to gain a more comprehensive understanding of the dynamic performance of the frame, this research conducted a modal analysis and explored the natural frequencies and vibration modes of the frame. These analysis results not only reveal potential problems in the vibration process of the frame but also provide strong guidance for subsequent optimization design. Third, through harmonic response analysis, the changes in amplitude and frequency of the frame during use were thoroughly studied, further verifying the rationality of the frame structure and the stability of dynamic performance. On the basis of the analysis of the static and dynamic characteristics of the frame, topology optimization and lightweight design were carried out on the frame. Through refined design adjustments, the weight of the frame has been successfully reduced while improving its strength and stiffness. Finally, this research validated and compared the optimized titanium alloy frame. The results showed that the optimized frame weight was reduced by 13.76%, the maximal stress was reduced by 5.19%, and the maximal deformation was reduced by 0.37%. The improved performance of the optimized frame fully demonstrates the feasibility and superiority of the optimization plan. This research not only provides a method to analyze the static and dynamic characteristics and the design of the topology optimization of the frame but also provides strong technical support for the lightweight development of the automotive manufacturing industry. Titanium alloy frame Topology optimizationFinite element analysis Lightweight design

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Research on a lightweight unmanned sightseeing vehicle frame based on multi-condition and multi-objective optimization

Cited by 5 publications

References 24 publications

Lightweight design of temporary support device of rectangular shield for the robot system of coal mine roadway excavation

Lightweight design of temporary support device of rectangular shield for the robot system of coal mine roadway excavation

Real-Time Path Planning for Obstacle Avoidance in Intelligent Driving Sightseeing Cars Using Spatial Perception

Analysis of Static and Dynamic Characteristics and Lightweight Design of Titanium Alloy Frame

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