Study of Martian Exploration Rover with Center-of-Gravity Shift Mechanism and Hybrid Wheel

Abstract:In this study we have attempted to classify the acceleration signal, while walking both at horizontal level, and upstairs and downstairs, using wavelet analysis. The acceleration signal close to the body’s center of gravity was measured while the subjects walked in a corridor and up and down a stairway. The data for four steps were analyzed and the Daubecies 3 wavelet transform was applied to the sequential data. The variables to be discriminated were the waveforms related to levels -4 and -5. The sum of the square values at each step was compared at levels -4 and -5. Downstairs walking could be discriminated from other types of walking, showing the largest value for level -5. Walking at horizontal level was compared with upstairs walking for level -4. It was possible to discriminate the continuous dynamic responses to walking by the wavelet transform.

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Assessment of the risk of derailment of tank cars with various height of the center of gravity of freight when driving along the track with real irregularities in plan and profile

Modern technologies System analysis Modeling ◽

10.26731/1813-9108.2020.1(65).182-191 ◽

2020 ◽

Keyword(s):

Center Of Gravity

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UJI TARIK HIDRODINAMIKMODEL KAPAL BERSAYAP WiSE DENGAN LAMBUNG DASAR BERSTEP

Jurnal Sains dan Teknologi Indonesia ◽

10.29122/jsti.v12i3.860 ◽

2013 ◽

Vol 12 (3) ◽

Author(s):

Iskendar Iskendar ◽

Andi Jamaludin ◽

Paulus Indiyono

Keyword(s):

Comparative Study ◽

Model Test ◽

Hydrodynamic Model ◽

Surface Effect ◽

Center Of Gravity ◽

Test Results ◽

Flat Bottom ◽

Towing Tank ◽

Test Models ◽

Wetted Surface Area

This paper describes hydrodynamic model tests of Wing in Surface Effect (WiSE) Craft. These craft was fitted with stephull form in different location on longitudinal flat bottom (stepedhull planning craft) to determine the influences of sticking and porpoising motion performances. These motions are usually occured when the craft start to take-off from water surfaces. The test models with scale of 1 : 7 were comprised of 4 (four) stephull models and 1 (one) non-stephull model as a comparative study. The hydrodynamic tests were performed with craft speed of 16 – 32 knots (prototype values) in Towing Tank at UPT. Balai Pengkajian dan Penelitian Hidrodinamika (BPPH), BPPT, Surabaya. The resistance (drag) was measured by dynamo meter and the trim of model (draft changing at fore and aft of model due to model speed) was measured by trim meter. By knowing the value of model trim, the wetted surface area can be determined. Then, the lift forces were calculated based on these measured values. The model test results were presented on tables and curves. Test results show that models with step located far away from center of gravity of the WiSE craft tend to porpoising and sticking condition, except if the step location on the below of these center of gravity. While model without step tends to sticking conditions.

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Optimalisasi sistem pergudangan pada industri air minum dalam kemasan (studi kasus pergudangan pt. ima montaz sejahtera).

Jurnal POLIMESIN ◽

10.30811/jop.v8i2.1368 ◽

2010 ◽

Vol 8 (2) ◽

pp. 803

Author(s):

Ramli Usman ◽

Achmad As'ad Sonief ◽

Bambang Indrayadi

Keyword(s):

Center Of Gravity ◽

Centre Of Gravity

PT. Ima Montaz Sejahtera merupakan suatu Perusahaan Industri Air Minum Dalam Kemasan (AMDK) dengan merk “Mount Agua” dan perusahaan ini menghasilkan produk berupa produk gallon 19 liter, produk botol 1500 ml, produk botol 600 ml, dan produk gelas 240 ml. Pabrik PT. Ima Montaz Sejahtera memiliki dua buah gudang yaitu gudang material dan gudang produk jadi, didalam pengoperasian proses produksi banyak waktu yang terbuang untuk mengangkut material dari gudang ke mesin produksi dan ini disebabkan letak gudang material jauh dari mesin produksi dan juga dalam mengangkut material dari gudang ke mesin produksi harus melalui gudang produk jadi sehingga mengganggu aktifitas proses produksi. Metode yang digunakan pada penelitian ini menggunakan metode center of gravity yaitu menentukan titik pusat letak gudang baru berdasarkan tata letak mesin-mesin produksi.Dengan meningkatnya waktu produksi maka dengan sendirinya kapasitas produksi juga meningkat untuk produk gallon 19 liter sebesar 36 gallon per minggu (0,490 %), produk botol 1500 ml sebesar 211 karton per minggu (2,475 %), produk botol 600 ml sebesar 71 karton per minggu (1,172 %), dan produk gelas 240 ml sebesar 186 karton per minggu(0,731 %).Kata Kunci: Optimalisasi, Tata Letak Gudang, Centre of Gravity, Lay Out.

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