Design engineers play a vital role in conceptualizing and designing an assembly. The assembly is then disintegrated into several subassemblies and geometric tolerance symbols and values are allocated. Often, the alloc...
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Design engineers play a vital role in conceptualizing and designing an assembly. The assembly is then disintegrated into several subassemblies and geometric tolerance symbols and values are allocated. Often, the allocated symbols and values are not realistic and conflict occurs as a result of improper assembly function, difficulty in manufacturing, and increased time and production costs. This article proposes a new design methodology. First, the functional behaviour of the assembly is predicted through finite element analysis, and the deformed geometry is expressed as a geometric tolerance zone constraint. Then, the functional assembly requirement is mathematically defined as a fit constraint. Simultaneously, rotational and planar machining constraints are developed. Finally, a combinatorial optimization problem is formulated to minimize the manufacturing cost. For optimal trade-offs, the bacterialforagingalgorithm is applied to solve the combinatorial optimization problem;when it is applied to a mounted disc brake assembly, promising results are obtained.
In order to improve the performance of bionic quadruped robot, some parameters of leg structure need to be optimized. The kinematic modeling of the leg mechanism of the bionic quadruped robot is analyzed, and the opti...
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In order to improve the performance of bionic quadruped robot, some parameters of leg structure need to be optimized. The kinematic modeling of the leg mechanism of the bionic quadruped robot is analyzed, and the optimization goal is determined. The simulation analyses showed that the improved bacterialforagingalgorithm had higher convergence accuracy, and was not easy to fall into local extremum. The improved multi-strategy bacteria foragingoptimizationalgorithm was used to find the optimal leg structure parameters under the original working space. Numerical simulation verifies that the leg structure designed runs smoothly after optimization, which lays a foundation for further research.
Non-orthogonal multiple access(NOMA)is a strong contender multicarrier waveform technique for the fth generation(5G)communication *** high peak-to-average power ratio(PAPR)is a serious concern in designing the NOMA **...
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Non-orthogonal multiple access(NOMA)is a strong contender multicarrier waveform technique for the fth generation(5G)communication *** high peak-to-average power ratio(PAPR)is a serious concern in designing the NOMA ***,the arrangement of NOMA is different from the orthogonal frequency division ***,traditional reduction methods cannot be applied to NOMA.A partial transmission sequence(PTS)is commonly utilized to minimize the PAPR of the transmitting NOMA *** choice phase aspect in the PTS is the only non-linear optimization obstacle that creates a huge computational complication due to the respective non-carrying sub-blocks in the unitary NOMA *** this study,an efcient phase factor is proposed by presenting a novel bacterial foraging optimization algorithm(BFOA)for PTS(BFOA-PTS).The PAPR minimization is accomplished in a two-stage *** the initial stage,PTS is applied to the NOMA signal,resulting in the partition of the NOMA signal into an act of *** the second stage,the best phase factor is generated using *** performance of the proposed BFOA-PTS is thoroughly investigated and compared to the traditional *** simulation outcomes reveal that the BFOA-PTS efciently optimizes the PAPR performance with inconsequential *** proposed method can signicantly offer a gain of 4.1 dB and low complexity compared with the traditional OFDM.
Cellular manufacturing has the potential to reduce the complexity of a manufacturing system, decoupling a complex factory in mini-factories or cells. This concept has an immense potential to be implemented in remanufa...
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Cellular manufacturing has the potential to reduce the complexity of a manufacturing system, decoupling a complex factory in mini-factories or cells. This concept has an immense potential to be implemented in remanufacturing, which is a promising circular economy strategy which allows to recover the value added to used products. A remanufacturing system is complex, and this creates a barrier to its implementation. This study introduces an ant-based algorithm which addresses the formation of product/part families and remanufacturing cells. A novel approach used in this study mimics ant behaviour by using an artificial pheromone that reinforces similarities between machines and parts, allowing the definition of cells and families with superior performance over Genetic algorithms (GA) and bacterial foraging optimization algorithm (BFOA) in the solution of benchmark problems.
Aiming at the low power level of the two-level Z-source inverter, the current and voltage harmonic distortion rate is high, the output power quality is low, The diode Neutral Point Clamp (NPC) three-level Z source inv...
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Aiming at the low power level of the two-level Z-source inverter, the current and voltage harmonic distortion rate is high, the output power quality is low, The diode Neutral Point Clamp (NPC) three-level Z source inverter has insufficient boost capacity, and the capacitor voltage stress is low, the Z source network of the three-level inverter is improved and applied to photovoltaic grid-connected. In order to speed up the dynamic response speed of the quasi-Z-source photovoltaic grid-connected system, and for the quasi-Z-source photovoltaic grid-connected system with the existing current inner loop control output harmonic distortion rate is high, and the steady-state error is large. the power feedforward bacterialforaging proportional complex integral (BFOA-PCI) control method is put foreward. The system about this method reduces the steady-state error through the PCI controller, and adds the bacterialforagingoptimization proportional coefficient K_P and integral coefficient K_i, makes K_P and K_i any the optimal conditions can be achieved, and introduces the output power feedforward of the photovoltaic array in the voltage outer loop, and its output is used as the reference value of the current inner loop. The method speeds up the system's response changes to the external environment, reduces the harmonic distortion rate, improves steady-state accuracy and the output power quality.
The electrical demand and generation in power systems is currently the biggest source of uncertainty for an electricity provider. For a dependable and financially advantageous electricity system, demand response (DR) ...
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The electrical demand and generation in power systems is currently the biggest source of uncertainty for an electricity provider. For a dependable and financially advantageous electricity system, demand response (DR) success as a result of household appliance energy management has attracted significant attention. Due to fluctuating electricity rates and usage trends, determining the best schedule for apartment appliances can be difficult. As a result of this context, the Improved Cockroach Swarm optimizationalgorithm (ICSOA) is combined with the Innovative Apartments Appliance Scheduling (IAAS) framework. Using the proposed technique, the cost of electricity reduction, user comfort maximization, and peak-to-average ratio reduction are analyzed for apartment appliances. The proposed framework is evaluated by comparing it with BFOA and W/O scheduling cases. In comparison to the W/O scheduling case, the BFOA method lowered energy costs by 17.75%, but the ICSA approach reduced energy cost by 46.085%. According to the results, the created ICSA algorithm performed better than the BFOA and W/O scheduling situations in terms of the stated objectives and was advantageous to both utilities and consumers.
Aiming at the low power level of the two-level Z-source inverter, the current and voltage harmonic distortion rate is high, the output power quality is low, The diode Neutral Point Clamp (NPC) three-level Z source inv...
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Aiming at the low power level of the two-level Z-source inverter, the current and voltage harmonic distortion rate is high, the output power quality is low, The diode Neutral Point Clamp (NPC) three-level Z source inverter has insufficient boost capacity, and the capacitor voltage stress is low, the Z source network of the three-level inverter is improved and applied to photovoltaic grid-connected. In order to speed up the dynamic response speed of the quasi-Z-source photovoltaic grid-connected system, and for the quasi-Z-source photovoltaic grid-connected system with the existing current inner loop control output harmonic distortion rate is high, and the steady-state error is large. the power feedforward bacterialforaging proportional complex integral (BFOA-PCI) control method is put foreward. The system about this method reduces the steady-state error through the PCI controller, and adds the bacterialforagingoptimization proportional coefficient K-P and integral coefficient K-i, makes K-P and K-i any the optimal conditions can be achieved, and introduces the output power feedforward of the photovoltaic array in the voltage outer loop, and its output is used as the reference value of the current inner loop. The method speeds up the system's response changes to the external environment, reduces the harmonic distortion rate, improves steady-state accuracy and the output power quality.
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