Hidayat, Dony
Lembaga Penerbangan dan Antariksa Nasional

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INVESTIGASI GAYA KONTAK/IMPAK PADA MAIN LANDING GEAR PESAWAT KOMUTER DENGAN PENDEKATAN MULTI-BODY SIMULATION (MBS) RIGID MODELS Hidayat, Dony; Istiyanto, Jos; Sumarsono, Danardono Agus; Marta, Aryandi
Jurnal Teknologi Dirgantara Vol. 15 No. 1 Juni 2017
Publisher : Lembaga Penerbangan dan Antariksa Nasional

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Abstract

Landing Gear Drop Test (LGDT) which aims to determine the characteristic of contact/impact force that occurs in the time of the touchdown landing has been conducted. Experimental tests using the apparatus requires a substantial time and cost. Virtual Landing Gear Drop Test (vLGDT) using MSC ADAMS software is one of the solutions for initial stage to testing landing gear. Stiffness values and damping coefficient obtained from vLGDT are 5.0e5 N/m and 1600 N.sec/m. Contact/impact force that occurs on vLGDT is 75996 N, while from experimental is 73612 N. The difference between vLGDT and experimental result is 3.14%.Abstrak:Pengujian landing gear yang bertujuan untuk mengetahui karakteristik gaya kontak/impak yang terjadi saat touchdown landing telah dilakukan. Pengujian eksperimental menggunakan apparatus membutuhkan waktu yang lama dan biaya yang besar. Vitual Landing Gear Drop Test (vLGDT) menggunakan perangkat lunak MSC ADAMS merupakan salah satu alternatif untuk pengujian tahap awal landing gear. Dari simulasi menggunakan vLGDT diperoleh nilai k = 5.0e5 N/m dan cmax = 1600 N.detik/m. Gaya kontak/impak yang terjadi pada simulasi menggunakan vLGDT sebesar 75996 N, sedangkan dari eksperimental sebesar 73612 N. Hasil vLGDT lebih besar 3.14% dibandingkan eksperimental.
Pengaruh Corporate Social Responsibility Terhadap Nilai Perusahaan Dengan Prosentase Kepemilikan Manajemen Sebagai Variabel Moderating (Studi Empiris Pada Perusahaan Yang Terdaftar di Bursa Efek Indonesia) Hidayat, Dony
JURNAL KOMPETITIF Vol 5 No 1 (2019)
Publisher : Universitas Islam Al-Azhar Mataram

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Abstract

This research aims is to know the influence of corporate social responsibility towards the firm value and Percentage of  management ownership as moderating variables. Goal of this research is to know: (1) The influence of Corporate Social Responsibility to the firm value, (2) The influence of Percentage of  management ownership as moderating variables in the relationship between Corporate Social Responsibility and the firm value. The data used are secondary data. Data obtained from the Consumer Goods companies listed in the Indonesian Stock Exchange (IDX). After the sample selection is done in accordance with the criteria specified, the obtained research sample of 34 companies. The tools to analyze the data used in this research is multiple regression analysis. The conclusions of this research are: (1) Corporate Social Responsibility (X1), the percentage of  management ownership (X2) and insteraction of Corporate Social Responsibility with the percentage of  management ownership (X1X2) are simultaneously with evident effect on the firm value. (2) Corporate Social Responsibility (X1) not significantly partialy affect the firm value, but the percentage of  management ownership included as a moderating variable, Corporate Social Responsibility and insteraction of Corporate Social Responsibility with the percentage of  management ownership (X1X2) have a significant effect on the firm value, while the percentage of  management ownership not significantly affect the firm value at Consumer Goods Companies in Indonesia Stock Exchange.