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process-controlled resonant testing

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220047
EISBN: 978-1-62708-341-6
... off the SCR’s in the inverter circuit. A feedback circuit from the resonant tank, together with power- and voltage-control signals, is fed to a local oscillator whose output signal then controls the inverter firing rate. The system then operates at a frequency along the straight portion of the tank’s...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110563
EISBN: 978-1-62708-247-1
... for these phenomena are implemented whenever possible and as aggressively as possible. For example, once a gyro has been characterized (i.e., the fab process and circuitry work properly when the process in in control), the electrical measurement of resonant frequency and Q are quick and effective. Good results...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360091
EISBN: 978-1-62708-435-2
... and the actual gearing element spiking resonance. Under forced vibration, a spiking phenomenon may occur either due to a gear element resonance or a housing resonance, or both. To separate these two possibilities, a methodology has been developed. Identification of Spiking Vibrations One of the tests...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870333
EISBN: 978-1-62708-314-0
..., shear wave), bond tests (resonance, pitch/catch, mechanical impedance) and eddy current (single and dual frequency). Summary of bond testing techniques Table 12.1 Summary of bond testing techniques Resonance method Transducer is driven at the resonance frequency (25–500 kHz), causing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050025
EISBN: 978-1-62708-311-9
... Abstract This chapter discusses the basic components in an induction heat treating system. It describes the design and operating characteristics of power supplies, load-matching transformers, tuning capacitors, power regulators, controllers, process monitors, and diagnostic systems. It also...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780343
EISBN: 978-1-62708-281-5
... pertinent to structure analysis. This is followed by a review of the characterization of plastics by infrared and nuclear magnetic resonance spectroscopy. The article then provides information on the distribution of molecular weight of an engineering plastic. It further discusses the methods used in thermal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110485
EISBN: 978-1-62708-247-1
... of the sample (e.g., topography, material properties, etc…). Laser/Detector - senses probe response to sample interactions. Detection and Control System - electronic system that processes tip response and controls the scanning system in all three axes (x, y, z), where x and y define the location...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220027
EISBN: 978-1-62708-341-6
... tuned. The chapter describes these procedures, including the processes involved in tuning induction heating circuits and load matching, impedance matching by means of a transformer, and tuning used for specific types of power supplies. capacitor tuning impedance matching induction heating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720393
EISBN: 978-1-62708-305-8
... Abstract Fabricated powder metallurgy (P/M) parts are evaluated and tested at several stages during manufacturing for part acceptance and process control. The various types of tests included are dimensional evaluation, density measurements, hardness testing, mechanical testing...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360107
EISBN: 978-1-62708-435-2
... due to Gear Tooth Geometry Error Quality control engineers at a gas turbine manufacturing company reported failure of four offset parallel gearboxes of similar design. Two failures occurred in the package test and two occurred in the field, all due to unacceptable levels of vibration. Figure 6.1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
... Abstract This chapter discusses the selection, use, and integration of methods to control process variables in induction heating, including control of workpiece and processing temperature and materials handling systems. The discussion of temperature control includes a review of proportional...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780089
EISBN: 978-1-62708-281-5
... properties of reactive thermoset systems, while the second utilizes these thermal characteristics as the basis for monitoring and control during processing. thermoset resins chromatography infrared spectroscopy physical test thermal analysis THERMOSETTING RESINS are unique among engineering...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... philosophies, inspection techniques and practices, material development, and material processing and controls and have redefined the criteria for failure. Furthermore, the pursuit of understanding how and why these failures occurred has resulted in the development of structural integrity programs, enhanced...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.htpa.t53310091
EISBN: 978-1-62708-346-1
... the sample with a defined test force. Its resonance frequency increases as soon as the indenter is brought into contact with the sample, during the generation of the indentation. The resonance frequency shift, Δ f , is determined under test force. It depends on the size of the contact area...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180029
EISBN: 978-1-62708-256-3
...) Improper testing Assembly errors Fabrication/manufacturing errors Design errors (design, stress, material selection, etc.) Service or Operation Today, service or operation is the first suspect when a failure occurs. As noted earlier, most components and machines, even processes, have...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
... density, elastic modulus, rheological behavior, particle size, formulation control, feedstock mixing, and feedstock properties. The chapter also provides information on the processes involved in feedstock preparation and testing. elastic modulus feedstock density feedstock mixing mixture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860343
EISBN: 978-1-62708-348-5
... In acoustic tests, acoustic energy is imparted to the specimen in a manner’ that simulates actual events inside typical liquid or gaseous oxygen systems. Acoustic tests include the pneumatic impact test (or adiabatic compression test), explosive shock tests, and resonance tube ignition. The pneumatic impact...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720267
EISBN: 978-1-62708-305-8
... scanning system. Also, advances in microprocessor technology have extended the data acquisition and signal processing capabilities of ultrasonic inspection systems. In most instances, the entire electronic assembly, including the controls and display, is contained in a single instrument. A typical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780359
EISBN: 978-1-62708-281-5
..., plasticizers, colorants, antidegradants, and process aids. It is this combination of molecular structure and complex formulation that requires specialized testing ( Ref 2 ). While the chemical composition of a failed metal component can often be evaluated using a single spectroscopic technique, a similar...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
... in the environment. Plasticizers Some naturally occurring polymers, such as rubber, are flexible and readily processed by appropriate machines. However, other naturally occurring polymers, such as gutta-percha, lignin, shellac, cellulose, and proteins, are relatively stiff. Both the cellulose present in paper...