NORDIC SUPPLIERS
must first be filtered and analysed by experts. Instead of data, customers
should receive regular reports and clear insights that help them take the
service actions needed.”
This is the key behind those solutions that have been successful on the
market. Achieving predictive maintenance requires an integration of
technology and human expertise, where algorithms suppl y the basis for
smarter decisions.
One of the suppliers who has been successful in this regard is Bosch
Rexroth, whose predictive maintenance solution for Hägglunds direct drive
systems, Hägglunds CMp, supports a rapidly expanding group of customers
worldwide.
Hägglunds CMp establishes a secure link to the customer’s drive system,
where sensors are installed throughout. Bosch Rexroth’s internal firewalls
protect all information that connects transmitted data with the customer,
who has access via a gated cloud interface. While in transit, the data itself
is meaningless, since the raw numbers cannot be paired with a sensor’s
location.
Evaluation is created by a proprietary analysis tool called ODiN, which
Hägglunds CMp uses to interpret the sensor readings. During an initial
machine learning phase, ODiN creates a health index that provides an
accurate picture of the drive system’s normal state. It is this health index –
not the individual sensor signals – that makes the difference for customers
when combined with Bosch Rexroth expertise.
The health index created with Hägglunds CMp is used to assess and
regularly report on the condition of the customer’s drive system. When a
divergence from the health index is spotted in the drive’s operation, Bosch
Rexroth experts interpret the cause and determine what service actions
might be needed to keep the system running.
Instead of simply receiving an alarm, the customer gets a concrete
recommendation for actions to be taken. The information provided is not
abstract data, but rather clear information that the customer can put into
use.
“It’s the combination of health index and expert analysis that makes our
solution work for the customer,” says Mattias Ljungdahl, Application
Manager, Hägglunds Inside Intelligence at Bosch Rexroth. “With the health
index, our analysts can not only see the trends, but also understand and
predict the drive behavior for the customer. And because our algorithm is
constantly learning, the solution gets better the more it works with an
application.”
A clear advantage of Hägglunds CMp is its integration with Bosch
Rexroth’s total service offering. This aspect is emphasised by Wolfram
Ulrich, Vice President Sales & Service for Hägglunds Products at Bosch
Rexroth, who says customers buy not just knowledge, but also the ability to
act.
“There are phone apps that can inform you of a fire alarm in your house,
but what you really want is to check if there is a fire, and in that case to put
the fire out,” Ulrich explains. “The connectivity Bosch Rexroth offers is
paired with fast, professional reaction by technicians with deep
knowledge.”
Ljungdahl takes this idea a step further, pointing out that service
becomes faster, simpler and more effective when the supplier has detailed
knowledge of the customer’s drive system. It is not only the alarms that
make a difference, but also the regular reports that form a long-term basis
for understanding.
“The solution increases the efficiency of our own service organisation,”
Ljungdahl explains. “When our service technicians go to a customer with
Hägglunds CMp, it’s not just the problem they know before they get there.
They’re familiar with the machine and how the application works normally,
which makes it easier for them to get things working properly.”
Efficiency, of course, is also the deeper goal of many customers, who are
increasingly focused on lifecycle costs and productivity. Being able to plan
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JUNE 2018 | International Mining 19