Atıf Sayısı
1
Görüntüleme
4
İndirme
1
Bu çalışmada, standart değerinden düşük lastik şişirme basıncının frenleme esnasında taşıta olan etkisi deneysel olarak incelenmiştir. Deneysel çalışma laboratuvar ortamında taşıt fren testlerinin yapılmasını sağlayan, yarım taşıt modeli olarak dizayn edilmiş Fren-Süspansiyon Test Cihazında gerçekleştirilmiştir. Testler yapılırken 24 psi’dan 34 psi standart değerine kadar toplam altı farklı lastik şişirme basıncı ele alınmıştır. Her bir lastik şişirme basıncı için ayrı ayrı gerçekleştirilen deneyler neticesinde basınç değişiminin frenleme esnasında taşıt süspansiyonun da oluşan yunuslama kuvvetini karakterize eden parabolik bir eğri elde edilmiştir. Deney sonuçlarında yola çıkılarak elde edilen eğriye uygun iki farklı matematik model lineer olmayan regresyon ile türetilmiştir. Lineer olmayan regresyon işlemi için klasik regresyon algoritması ile Newton-Raphson İterasyon metodu birleştirilerek elde edilen Hibrit bir iteratif regresyon algoritması kullanılmıştır. Fourier Seri açılımı ve üçüncü derece polinom temel alınarak iki farklı matematik model elde edilmiştir. Elde edilen matematik modellerin sırasıyla R2=0,9957 ve R2=0,9104 mertebesinde hassasiyet sağladığı görülmüştür.
In this study, the impact of the pneumatic swelling pressure below the standard value during braking has been experimentally studied. Experimental work was carried out in the brake-suspension test device designed as a semi- vehicle model, which enables vehicle brake tests to be performed in the laboratory environment. During the tests, a total of six different tire swelling pressure from 24 psi to 34 psi standard value was addressed. As a result of tests performed separately for each tire swelling pressure, a parabolic curve was obtained that characterizes the swelling force of the vehicle suspension during the braking of the pressure change. Two different mathematical models were derived by non-linear regression according to the curve obtained by the output in the experimental results. For the non-linear regression process, a hybrid iterative regression algorithm, obtained by combining the Newton-Raphson iteration method with the classic regression algorithm, was used. Fourier series openings and third degree polynomium are based on two different mathematical models obtained. The mathematical models were found to provide sensitivity at R2 = 0.9957 and R2 = 0.9104 degrees respectively.
In this study, the influence of the tire inflation pressure lower than the standard value to pitching force was examined experimentally. Experimental studies were carried out in a laboratory environment by using Brake-Suspension Test Device. That device is designed as a half-vehicle model due to perform vehicle braking tests. Five different tire inflation pressures, from 26 psi to 34 psi standard value, were considered when testing was conducted. As a result of the experiments carried out separately for each tire inflation press, a parabolic curve is obtained which characterizes the effect of pressure variation on the vehicle during braking. Two different equations for the parabolic curve obtained from the test results are derived by nonlinear regression. Nonlinear regression is made by using a hybrid iterative nonlinear regression algorithm, which is obtained by combining the conventional regression algorithms and the Newton Raphson Iteration Method. Two different mathematical models were obtained based on Fourier Series expansion and third order polynomial. The obtained mathematical models were provided high accuracy such as R2 = 0.9957 and R2 = 0.9104, respectively.
Alan : Fen Bilimleri ve Matematik; Mühendislik
Dergi Türü : Ulusal
Makale Detay 
Atıf Yapanlar
Benzer Makaleler
PDF Görüntüle
Dergi Bilgisi
Eseri Dinleyin
Bu Sayfayı Yazdırın
Paylaş
Mendeley
