برداشت انرژی از سیستم دیسک صلب چرخان با دو تیر طره و پیزوالکتریک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مکانیک- دانشگاه صنعتی خواجه نصیرالدین طوسی- تهران- ایران

2 دانشکده مکانیک-دانشگاه خواجه نصیر الدین طوسی-تهران- ایران

چکیده

در این پژوهش یک سیستم برداشت انرژی که در آن دو تیر طره کوپل شده با لایه های پیزوالکتریک به یک دیسک ‏صلب چرخان متصل هستند معرفی شده است. ‏ابتدا معادلات سیستم با استفاده از روابط الکترومکانیکال لاگرانژ نوشته و سپس به روش حل دقیق و ‏تقریب رزونانسِ حل دقیق، حل شده است. همچنین سیستم برداشت انرژی به کمک نرم افزار شبیه سازی گردیده ‏است. اثر سرعت زاویه ای بر ولتاژ، مقاومت الکتریکی و توان بهینه بررسی و مشاهده شد که با افزایش سرعت زاویه ای، ولتاژ و مقاومت بهینه ابتدا کاهش و سپس افزایش می یابد ولی توان بهینه ابتدا افزایش و سپس کاهش می ‏یابد. کمینه ولتاژ و مقاومت بهینه و بیشینه توان بهینه در سرعت 44 رادیان بر ثانیه بدست می آید. ‏‎ ‎نتایج نشان ‏داد که در این سیستم به منظور تولید توان حداکثر مطلقِ 0/094 وات به مقاومت الکتریکی 1115 اهم نیاز است. ‏همچنین تغییرات توان بر حسب تغییرات ولتاژ و مقاومت الکتریکی بررسی شده است. مقایسه نتایج سه روش ‏استفاده شده نشان داد که مطابقت بالایی میان نتایج حاصل از حل معادلات و شبیه سازی وجود دارد و پاسخ های ‏تقریب رزونانس ساده تر از پاسخ های حل دقیق بوده و خطای ناچیزی دارد.‏

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Energy harvesting from a rotating rigid disk system with two console beams and piezoelectric

نویسندگان [English]

  • esmaeil shirazi 1
  • Ali asghar jafari 2
1 Faculty of Mechanics -K.N. TOOSI UNIVERSITY OF TECHNOLOGY- Tehran-Iran
2 Faculty mechanical engineering- K. N. Toosi University of Technology-Tehran-Iran
چکیده [English]

In this research, a energy harvesting system was introduced in which two console beams coupled with ‎piezoelectric layers are ‎connected to a rotating rigid disk. ‎First, the system equations were written using the ‎electromechanical Lagrange equations and then solved by exact solution and resonance ‎approximation of the exact solution methods. The energy harvesting system was also simulated ‎in software. The effect of angular velocity on resistance, voltage and optimal power was ‎investigated and observed that increasing angular velocity, the optimal resistance and voltage ‎first decrease and then increase, but the optimal power first increases and then decreases. ‎Optimal minimum resistance and voltage and maximum optimal power are obtained at 44 ‎rad/s. The results showed that in this system in order to produce absolute maximum power of ‎‎0.094 W, electrical resistance of 1115 Ω is required. Power were also evaluated versus ‎electrical voltage and resistance. Moreover, comparison of the results of the three methods ‎showed very good agreement between the results of solving equations and simulation and ‎resonance approximation solution responses are simpler than exact solution ones and have ‎negligible error.‎

کلیدواژه‌ها [English]

  • Energy Harvesting
  • Piezoelectric
  • Rotating beam
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