In this study, the active force cancellation performance of a robust H∞ controller is investigated on a near resonance vibrating system consisting of a rotating machine hard mounted on a flexible base. This configuration and phenomenon can be present in vehicle engine mounts. The model of the vibrating system was first identified experimentally. The uncompensated system frequency response is then used to design the controller. The control objective is to reduce the system (RMS) gain. The effectiveness of the controller has been demonstrated experimentally through implementation on a digital signal processor. Results show reductions of the measured RMS transmitted forces at different mount locations when the machine is operated at speeds near the principal mode of vibration. However at frequency where the vibration is not significant, the reduction in transmitted force level can be minimal.
- Inderscience Publishers
- Active force cancellation of a near resonance vibrating system ...
University plans to provide 50 napkin incinerators to educational institutions
Trichy: Bharathidasan University has planned to provide 50 electrical sanitary napkin incinerators (ESNIs) worth about Rs 21 lakh to schools and colleges. In this connection, the university has signed a memorandum of understanding with BHEL, Trichy.Twenty-five electrical sanitary napkin incinerators were supplied to the identified institutions during the first phase that began last year.BHEL, under its corporate social responsibility (CSR) scheme, signed an agreement on Thursday with the Bharathidasan University&rs...
GHS Label Requirements
While the initial December 1, 2013 training deadline for the revised Hazard Communications Standard (HCS) has come and gone, companies are still responsible for providing employees with on-going safety data sheets and GHS label training. With this in mind, we thought it would be helpful to provide a recap of the six elements that are now required on a GHS label.In conjunction with updating your company’s hazard communications program, and updating all of your safety data sheets to meet the new 16 Section...
White Paper & Video on FTIR multigas analysis
Gasmet Technologies has published a free White Paper and a video on the simultaneous measurement of multiple gases in a wide variety of applications using FTIR. Both the video and the White Paper can be found here at www.gasmet.com or by visiting the Quantitech stand 62/63 at AQE 2017. With the ability to measure almost any gas, FTIR technology is employed in an enormous variety of applications including Continuous Emissions Monitoring, Stack Testing, Process Control, Industrial Hygiene, Engine Emissions,...
ANSI Compliant Safety Showers in the manufacturing, pharmaceutical and oil & gas industries
How you react in the first 10 to 15 seconds after exposure to a toxic substance, particularly if it is corrosive, is crucial. A delay in treatment, even for just a few seconds, can lead to serious long-term health issues or painful injuries. As such, emergency safety showers must be situated within any hazardous or industrial workplace.Manufacturing Industry Handling raw materials and chemicals can all be dangerous for workers in the manufacturing industry. In order to prevent or lessen injuries, emergency...
Bringing aeroconservation down to Earth
From migrating birds to pollinating bees to seed-dispersing plants, thousands of species depend on the quality of the aerosphere — the layer of air that surrounds our planet. Despite this, aircraft, wind farms, drones, telecommunication towers and other anthropogenic infrastructure increasingly crowd this critical habitat. Current species conservation efforts are generally focused on terrestrial and aquatic habitats, but not on airspace as a similarly important ecosystem. This needs to change, says a...