A Method of Generating Timing for a Given Target Current Waveform in Electromagnetic Launch Technology

Jin, A. J.; Zhang, B. Dongdong; Yuan, Chenxi; Yuan, Ruimin; Wei-dong, XU; Yan, Ping

doi:10.1109/tps.2017.2706219

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…Studies can be found in the Table 2. Muzzle velocity GA Current [8] Max velocity, max efficiency GA, NSGA-II Accelaration [9] Max velocity, max efficiency GA, NSGA-II Current [5] Desired current waveform GA [12] Muzzle velocity Harmony Search, ODM Current…”

Section: Literature Survey Of Ttopmentioning

confidence: 99%

“…(R emf ). Although back-emf is not a resistive component from a physical perspective, it can be modeled with a resistor from a mathematical perspective like in (5,6).…”

Section: The Simulation Modelmentioning

confidence: 99%

“…The triggering time's nonprogrammable nature results in large numbers of input parameters, i.e., each triggering time becomes a parameter. Thus, GA has better performance on large dimensional input space so that it is a convenient way to use in TTOP [5]- [9]. However, the relation between rail current waveform and the set of triggering times in fact can be programmable in specific rail current shapes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electromagnetic Launcher Speed Control with a Multilevel Fast Triggering Time Algorithm (MFTTA)

Tosun¹

2020

Preprint

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Section: Literature Survey Of Ttopmentioning

confidence: 99%

“…(R emf ). Although back-emf is not a resistive component from a physical perspective, it can be modeled with a resistor from a mathematical perspective like in (5,6).…”

Section: The Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electromagnetic Launcher Speed Control with a Multilevel Fast Triggering Time Algorithm (MFTTA)

Tosun¹

2020

Preprint

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“…In order to produce a few MJ electrical energy, several capacitor-based PPS modules should be connected in parallel. Since there are many units in the PPS, each unit's triggering time affects the total discharge current waveform [5]. Thus, timing sequence PPS should be optimized in order to enhance the performance of the EML.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Launcher Speed Control with a Multilevel Fast Triggering Time Algorithm (MFTTA)

Tosun

Polat

Keysan

2021

2021 IEEE Pulsed Power Conference (PPC)

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Electromagnetic launchers (EMLs) can provide accurate speed control of a projectile compared to gun-powder based alternatives. However large-caliber launchers have several pulse power supply (PPS) modules connected in parallel to reach the required current levels. Determination of the triggering instants of these parallel PPS modules is a crucial part of the launch mechanism. The triggering instants does not only affect the exit velocity but also the forces on the armature which can lead to transition i.e. separation of the armature from the rails. In this study, a triggering sequence optimization method that is faster than other alternatives in the literature and take into account speed-dependent parasitic masses and transition phenomena. Real-coded genetic algorithm (RCGA) and Partical Swarm Optimization (PSO) are used to create bencmarks. 32 capacitive PPS modules with 8 MJ total energy is used. With the achieved accuracy and speed, this study offer: An effective speed control algorithm with several physical constraints.

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“…The essence of electromagnetic launch technology is energy conversion [2]. Therefore, it is the key link of an electromagnetic launch system that its converters have high reliability and wide applicability [3, 4]. Moreover, the core equipment of converter is inverter [5].…”

Section: Introductionmentioning

confidence: 99%

DC‐link capacitor voltage balance strategy of independent double three‐phase common bus five‐level NPC/H‐bridge inverter based on finite control set

Wang

2020

IET Power Electronics

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This study aims at the DC-link capacitor voltage imbalance problem of independent double three-phase common bus five-level neutral point-clamped/H-bridge inverter, which is applied to an electromagnetic launch system under instant highpower and high-current conditions. First, the traditional method of voltage balance strategy based on redundant vectors is described, and the key factors leading to the DC-link capacitor voltage fluctuation is analysed in detail. Second, the objective function is constructed to predict the variation trend of DC-link capacitance voltage difference. Third, an optimised voltage balance strategy is proposed. At first, the optimised strategy calculates the variation trends of the voltage difference for all threephase switch vector combinations. Then, the results make up a voltage balance finite control set. At last, compare the results in the set to select the vector combination corresponding to the minimum variation for output. Finally, tested by the semi-physical real-time simulation platform, and the proposed optimised voltage balance strategy is verified effective for improving DC-link capacitor voltage imbalance and inhibiting the voltage difference fluctuation.

show abstract

A Method of Generating Timing for a Given Target Current Waveform in Electromagnetic Launch Technology

Cited by 8 publications

References 7 publications

Electromagnetic Launcher Speed Control with a Multilevel Fast Triggering Time Algorithm (MFTTA)

Electromagnetic Launcher Speed Control with a Multilevel Fast Triggering Time Algorithm (MFTTA)

Electromagnetic Launcher Speed Control with a Multilevel Fast Triggering Time Algorithm (MFTTA)

DC‐link capacitor voltage balance strategy of independent double three‐phase common bus five‐level NPC/H‐bridge inverter based on finite control set

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