This paper introduces a method using an accelerometer and Fast Fourier Transform (FFT) to recognize vibration spectrum. This spectrum will be compared with standard one built by the manufacturer. In this paper, the standard spectrum of well-known elevator manufacturers such as Otis, Schindler etc. will be introduce (introduced?) for reference of Vietnamese elevator manufacturer. | TẠP CHÍ PHÁT TRIỂN KH&CN, TẬP 20, SỐ K1-2017 5 Study on vibration threshold of the elevator in Vietnam Luu Thanh Tung Abstract— Nowadays, elevators are installed for most of buildings and they are familiar with everyone in modern life. Thus, the elevators are required smoother and quieter. However, elevator manufacturing factories have no method and equipment to measure vibration in elevators. This paper introduces a method using an accelerometer and Fast Fourier Transform (FFT) to recognize vibration spectrum. This spectrum will be compared with standard one built by the manufacturer. In this paper, the standard spectrum of well-known elevator manufacturers such as Otis, Schindler etc. will be introduce (introduced?) for reference of Vietnamese elevator manufacturer. Index Terms— FTT, vibration amplitude. 1 INTRODUCTION N ew buildings in cities, not only commercial, but hotels and residential blocks are rising higher than ever. Architects are driven to design skyscrapers due to expensive land cost. These buildings require elevators run at super high speeds so as to save travel times within the buildings. To meet this requirement, some elevator manufacturers have in recent years developed technologies to allow elevators to achieve speed as high as 810m/min (). The increase in speed of elevator does not only lead to riding comfort problem for passengers inside lift car while also caused a series of problems in regards to the generation of noise and vibration in the elevators [1]. Most nowadays elevators consist of an electric traction engine pulling on wire ropes attached to the top of the lift car. The motor unit is often Manuscript Received on October 27th, 2016, Manuscript Revised February 27th, 2017 Luu Thanh Tung – Ho Chi Minh City University of Technology, Vietnam National University – Ho Chi Minh City. (e-mail: ttluu@). located on top of the building in a dedicated penthouse lift room. Air-borne noise from lifts has generally never
